Journal articles: 'Master-slave coupling'

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Biswas, Dhrubajyoti, and Sayan Gupta. "Mirroring of synchronization in a bi-layer master–slave configuration of Kuramoto oscillators." Chaos: An Interdisciplinary Journal of Nonlinear Science 32, no. 9 (2022): 093148. http://dx.doi.org/10.1063/5.0109797.

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The phenomenon of mirroring of synchronization is investigated in dynamically dissimilar, unidirectionally coupled, bi-layer master–slave configuration of globally coupled Kuramoto oscillators. The dynamics of the master layer depends solely on the distribution of the natural frequencies of its oscillators. On the other hand, the slave layer dynamics depends not only on the distribution of the natural frequencies of its oscillators but also on the unidirectional coupling with the master layer. The standard Kuramoto order parameter is used to study synchronization in the individual layers and of the bi-layer network. A transition to a completely mirroring state is observed in the dynamics of the slave layer, as the mirroring coefficient in the unidirectional coupling is increased. We derive analytically and verify numerically the conditions for the slave layer to fully mimic the synchronization properties of the master layer. It is further shown that while the master and slave layers are individually synchronized, the bi-layer network exhibits a state of frustrated synchronization.

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Jia, Yijun, Nan Zhang, and Zhaozhe An. "Double machine vibration synchronization system based on GA-PID." Journal of Physics: Conference Series 2174, no. 1 (2022): 012077. http://dx.doi.org/10.1088/1742-6596/2174/1/012077.

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Abstract Aiming at the problem that it is difficult to realize the synchronization of motor speed under the electromechanical coupling condition of DC motor and vibrating mass in double machine drive vibration system, the PID parameters of DC motor are optimized by using master-slave control mode and genetic algorithm. Firstly, the electromechanical coupling model of the vibration system is established, and the differential equation of motion of the system is obtained by using Lagrange equation; Using master-slave control structure and genetic PID control algorithm, a controller based on master motor speed difference and slave motor phase difference is designed; The MATLAB/Simulink simulation model is established to verify the effectiveness of the control system. The experimental results show that the genetic PID algorithm based on master-slave control structure can better realize the synchronous control of dual machine driven vibration system. The research content can provide a theoretical basis for the design, control and application of this type of vibration system.

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DE ABREU, J., P. GARCÍA, and J. GARCÍA. "A DETERMINISTIC APPROACH TO THE SYNCHRONIZATION OF NONLINEAR CELLULAR AUTOMATA." Advances in Complex Systems 20, no. 04n05 (2017): 1750006. http://dx.doi.org/10.1142/s0219525917500060.

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In this work, we introduce a deterministic scheme of synchronization of nonlinear cellular automata with chaotic behavior, connected through a master–slave coupling. By using a definition of Boolean derivative, we utilize the linear approximation of the cellular automata rules to design a deterministic and simple coupling function that ensures synchronization. Our results show that it is possible to synchronize nonlinear chaotic cellular automata using a deterministic coupling function that does not introduce into the slave all the information about the state of the master.

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CHEN, YUN, and XIAOFENG WU. "GLOBAL CHAOS SYNCHRONIZATION OF NONAUTONOMOUS GYROSTAT SYSTEMS VIA VARIABLE SUBSTITUTION CONTROL." International Journal of Bifurcation and Chaos 18, no. 12 (2008): 3719–30. http://dx.doi.org/10.1142/s0218127408022676.

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This paper suggests a master-slave nonautonomous synchronization scheme with variable substitution control. According to the scheme, some sufficient algebraic criteria for global chaos synchronization of the master and slave nonautonomous gyrostat systems via various single-variable coupling are derived. The effectiveness of the obtained criteria is numerically verified by some examples.

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Garashchuk, I. R., and D. I. Sinelshchikov. "Excitation of a Group of Two Hindmarsh – Rose Neurons with a Neuron-Generated Signal." Nelineinaya Dinamika 18, no. 4 (2022): 0. http://dx.doi.org/10.20537/nd220901.

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We study a model of three Hindmarsh – Rose neurons with directional electrical connections. We consider two fully-connected neurons that form a slave group which receives the signal from the master neuron via a directional coupling. We control the excitability of the neurons by setting the constant external currents. We study the possibility of excitation of the slave system in the stable resting state by the signal coming from the master neuron, to make it fire spikes/bursts tonically. We vary the coupling strength between the master and the slave systems as another control parameter. We calculate the borderlines of excitation by different types of signal in the control parameter space. We establish which of the resulting dynamical regimes are chaotic. We also demonstrate the possibility of excitation by a single burst or a spike in areas of control parameters, where the slave system is bistable. We calculate the borderlines of excitation by a single period of the excitatory signal.

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Yang, Shu-Chih, Debra Baker, Hong Li, et al. "Data Assimilation as Synchronization of Truth and Model: Experiments with the Three-Variable Lorenz System*." Journal of the Atmospheric Sciences 63, no. 9 (2006): 2340–54. http://dx.doi.org/10.1175/jas3739.1.

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Abstract The potential use of chaos synchronization techniques in data assimilation for numerical weather prediction models is explored by coupling a Lorenz three-variable system that represents “truth” to another that represents “the model.” By adding realistic “noise” to observations of the master system, an optimal value of the coupling strength was clearly identifiable. Coupling only the y variable yielded the best results for a wide range of higher coupling strengths. Coupling along dynamically chosen directions identified by either singular or bred vectors could improve upon simpler chaos synchronization schemes. Generalized synchronization (with the parameter r of the slave system different from that of the master) could be easily achieved, as indicated by the synchronization of two identical slave systems coupled to the same master, but the slaves only provided partial information about regime changes in the master. A comparison with a standard data assimilation technique, three-dimensional variational analysis (3DVAR), demonstrated that this scheme is slightly more effective in producing an accurate analysis than the simpler synchronization scheme. Higher growth rates of bred vectors from both the master and the slave anticipated the location and size of error spikes in both 3DVAR and synchronization. With less frequent observations, synchronization using time-interpolated observational increments was competitive with 3DVAR. Adaptive synchronization, with a coupling parameter proportional to the bred vector growth rate, was successful in reducing episodes of large error growth. These results suggest that a hybrid chaos synchronization–data assimilation approach may provide an avenue to improve and extend the period for accurate weather prediction.

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Uriostegui-Legorreta, Ulises, and Eduardo Salvador Tututi-Hernández. "Master-slave synchronization in the Rayleigh and Duffing oscillators via elastic and dissipative couplings." Revista de Ciencias Tecnológicas 5, no. 1 (2022): 151–64. http://dx.doi.org/10.37636/recit.v51151164.

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In this work, a master-slave configuration to obtain synchronization between the Rayleigh and the Duffing oscillators is studied. For this configuration, we analyze the system when the dissipative coupling and one that combines the elastic and dissipative couplings are used. We analyzed the coupling parameters to find the range where synchronization between the oscillators is achieved. We found synchronization in the oscillators for large values of the coupling parameter. Our numerical findings show that for the dissipative coupling, there exists partial synchronization while for the others there is complete synchronization.

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Li, Dong Jie, Wei Bin Rong, Li Ning Sun, and Wan Zhe Xiao. "Stability and Performance of Virtual Reality-Based Telenanomanipulation System in SEM." Advanced Materials Research 183-185 (January 2011): 1746–51. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1746.

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In this paper, a master/slave telenanomanipulation control system with force feedback is established with the micro-positioner (Attocube) working in scanning electron microscope (SEM) as the slave side and the haptic device (Omega3) as the master side. An improved virtual coupling (IVC) algorithm is introduced based on nanoscale virtual coupling (NSVC) by adding a proportional- plus-integral (PI) velocity controller in the haptic interface. The stability and performance of the established system are discussed. This method leads to an explicit design procedure for virtual coupling networks which give greatest performance while guaranteeing stability both on moving carbon nanowires in SEM and measuring force at the point of device-human contact.

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Sung, Gang Neng, Chien Ming Wu, Wen Ching Chen, and Chun Ming Huang. "Design of DC Power Line Communication System Using Time-Division Multiplexing." Applied Mechanics and Materials 431 (October 2013): 325–30. http://dx.doi.org/10.4028/www.scientific.net/amm.431.325.

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This work investigates a power line communication (PLC) in a DC power management system comprising master-slave control networks. Microcontroller-based master and slave units are designed with serial ports for communication with a controller and a transmission port to couple the signal to modems at both ends. However, coupling data signals to power line through modulation interfacing circuits is a challenging task. In this work, we used time-division multiplexing (TDM) technique to divide into two timings, Powering Time and Communication Time, on the DC power line and can reduce the complexity of the master-slave network and noise effect on the power line.

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Wang, Wei, Ting Yu, Tian Jiao Pu, Ai Zhong Tian, and Ji Keng Lin. "The Optimal Controlled Partitioning Strategy for Power System Based on Master-Slave Problem." Applied Mechanics and Materials 385-386 (August 2013): 999–1006. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.999.

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Controlled partitioning strategy is one of the effective measures taken for the situation when system out-of-step occurs. The complete splitting model, mostly solved by approximate decomposition algorithms, is a large-scale nonlinear mixed integer programming problem. A new alternate optimization method based on master-slave problem to search for optimal splitting strategy is proposed hereby. The complete model was converted into master-slave problems based on CGKP (Connected Graph Constrained Knapsack Problem). The coupling between master problem and slave problem is achieved through load adjustment. A better splitting strategy can be obtained through the alternating iteration between the master problem and the salve problem. The results of the examples show that the method can obtain better splitting strategy with less shed load than other approximate algorithms, which verifies the feasibility and effectiveness of the new approach presented.

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Li, Fang Yuan. "The Research of Servo Motor Control Strategies for the Mobile Gantry Milling Machine." Advanced Materials Research 960-961 (June 2014): 1237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.1237.

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It is known for the traditional milling machine in operation at low speed and efficiency. This paper describes the research of servo motor control strategies for the mobile gantry milling machine. The principles of AC servo motor dynamics, master-slave servo control, and adaptive-neuro fuzzy inference system based on controller are illustrated. Using these strategies when the master servo motor is interference by the external signal, the reference speed of the slave servo motor can follow just like the master motor. Finally the mechanical coupling can be eliminated and the mechanical damage can be avoided.

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12

Puebla, Hector, Eliseo Hernández-Martínez, Mariana Rodriguez-Jara, and Cesar S. Lopez-Monsalvo. "Robust Master-Slave Synchronization of Neuronal Systems." Mathematical Problems in Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/7587294.

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The desire to understand physiological mechanisms of neuronal systems has led to the introduction of engineering concepts to explain how the brain works. The synchronization of neurons is a central topic in understanding the behavior of living organisms in neurosciences and has been addressed using concepts from control engineering. We introduce a simple and reliable robust synchronization approach for neuronal systems. The proposed synchronization method is based on a master-slave configuration in conjunction with a coupling input enhanced with compensation of model uncertainties. Our approach has two nice features for the synchronization of neuronal systems: (i) a simple structure that uses the minimum information and (ii) good robustness properties against model uncertainties and noise. Two benchmark neuronal systems, Hodgkin-Huxley and Hindmarsh-Rose neurons, are used to illustrate our findings. The proposed synchronization approach is aimed at gaining insight into the effect of external electrical stimulation of nerve cells.

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Li, Dong Jie, Wei Bin Rong, Li Ning Sun, Wan Zhe Xiao, and Yu Zou. "Virtual Force Feedback-Based 3D Master/Slave Tele-Nanomanipulation in SEM." Journal of Nano Research 20 (December 2012): 109–16. http://dx.doi.org/10.4028/www.scientific.net/jnanor.20.109.

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In this paper, we focus on the need for real time nanomanipulation, a 3D Master/Slave tele-nanomanipulation platform is studied with the haptic device (Omega3) as the master and the nanopositioner (Attocube) as the slave, working in scanning electron microscope (SEM). The 3D manipulation environment is developed with the help of VR technology. The platform is controlled by the enhanced virtual coupling (EVC) algorithm. The stability of the platform is discussed with Llewellyns stability criteria. Scale factors and enhancement factor of the control system are determined, according to the force applied on master and slave terminals. Performances of the platform are tested with the ZnO nanowire manipulation experiments. Experiment results show that the platform has good performance while guaranteeing stability on ZnO nanowires manipulation in SEM using the method presented in this paper.

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YOKOKOHJI, Yasuyoshi, and Tsuneo YOSHIKAWA. "Bilateral Control of Master-Slave Manipulators for Ideal Kinesthetic Coupling." Transactions of the Society of Instrument and Control Engineers 27, no. 1 (1991): 56–63. http://dx.doi.org/10.9746/sicetr1965.27.56.

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Isah, A., A. S. Tchakoutio Nguetcho, S. Binczak, and J. M. Bilbault. "Dynamics of a charge‐controlled memristor in master–slave coupling." Electronics Letters 56, no. 4 (2020): 211–13. http://dx.doi.org/10.1049/el.2019.3322.

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CISZAK, MARZENA, RAÚL TORAL, and CLAUDIO MIRASSO. "COUPLING AND FEEDBACK EFFECTS IN EXCITABLE SYSTEMS: ANTICIPATED SYNCHRONIZATION." Modern Physics Letters B 18, no. 23 (2004): 1135–55. http://dx.doi.org/10.1142/s0217984904007694.

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This paper reviews our recent work on the synchronization of excitable systems in a master–slave configuration and when the slave system includes a delayed self-coupling term. Particularly, we address the existence of the so-called anticipated synchronization, i.e. a dynamical regime in which the slave system is able to reproduce in advance the evolution of the master. This is most remarkable since the anticipated synchronization appears even when the excitable spikes are induced by random terms, such as white noise. After providing a short review of the general theory of synchronization as well as the main features of excitable systems, we present numerical and experimental results in coupled excitable systems of the FitzHugh–Nagumo type driven by different types of noise. The experiments have been done in electronic implementations of the model equations. We present the conditions (values of the coupling intensity and delay time) for which the anticipated synchronization regime is a stable one and show that it is possible to increase the anticipation time by using a cascade of several coupled systems. We use a particular limit of the FitzHugh–Nagumo system, as well as a simple excitable model, to give evidence that the physical reason for the existence of anticipated synchronization is the lowering of the excitability threshold of the slave due to the coupling. Finally, we propose a hypothesis for a possible explanation of the zero-lag synchronization observed in some real neuron systems.

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Bozic, Milos, Sanja Antic, Vojislav Vujicic, Miroslav Bjekic, and Goran Djordjevic. "Electronic gearing of two DC motor shafts for Wheg type mobile robot." Facta universitatis - series: Electronics and Energetics 31, no. 1 (2018): 75–87. http://dx.doi.org/10.2298/fuee1801075b.

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This paper describes the implementation of electronic gearing of two DC motor shafts. DC motors are drives for a mobile robot with wheels in the form of wheel - leg (Wheg) configuration. A single wheel consists of two Whegs (dWheg). The first DC motor drives one Wheg, while the second one drives another independent Wheg. One motor serves as the master drive motor, while the other represents the slave drive motor. As the motors are independent, it is necessary to synchronize the speed and adjust the angle between shafts. The main contribution of this paper is the implementation of control structure that enables the slave to follow the master drive, without mechanical coupling. Based on encoder measurements, the slave effectively follows the master drive for the given references of speed and angle. Speed and positioning loops are implemented on real time controller - sbRIO. The laboratory setup was created and comparison of realized and required angles and speeds was made.

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Santillán, Moisés. "Periodic Forcing of a 555-IC Based Electronic Oscillator in the Strong Coupling Limit." International Journal of Bifurcation and Chaos 26, no. 03 (2016): 1630007. http://dx.doi.org/10.1142/s021812741630007x.

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We designed and developed a master-slave electronic oscillatory system (based on the 555-timer IC working in the astable mode), and investigated its dynamic behavior regarding synchronization. For that purpose, we measured the rotation numbers corresponding to the phase-locking rhythms achieved in a large set of values of the normalized forcing frequency (NFF) and of the coupling strength between the master and the slave oscillators. In particular, we were interested in the system behavior in the strong-coupling limit, because such problem has not been extensively studied from an experimental perspective. Our results indicate that, in such a limit, a degenerate codimension-2 bifurcation point at NFF = 2 exists, in which all the phase-locking regions converge. These findings were corroborated by means of a mathematical model developed to that end, as well as by ad hoc further experiments.

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Cari, Elmer P. T., Edson A. R. Theodoro, Ana P. Mijolaro, Newton G. Bretas, and Luis F. C. Alberto. "Trajectory Sensitivity Method and Master-Slave Synchronization to Estimate Parameters of Nonlinear Systems." Mathematical Problems in Engineering 2009 (2009): 1–14. http://dx.doi.org/10.1155/2009/387317.

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A combination of trajectory sensitivity method and master-slave synchronization was proposed to parameter estimation of nonlinear systems. It was shown that master-slave coupling increases the robustness of the trajectory sensitivity algorithm with respect to the initial guess of parameters. Since synchronization is not a guarantee that the estimation process converges to the correct parameters, a conditional test that guarantees that the new combined methodology estimates the true values of parameters was proposed. This conditional test was successfully applied to Lorenz's and Chua's systems, and the proposed parameter estimation algorithm has shown to be very robust with respect to parameter initial guesses and measurement noise for these examples.

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Pyragas, Kestutis, and Tatjana Pyragienė. "Extending anticipation horizon of chaos synchronization schemes with time-delay coupling." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 368, no. 1911 (2010): 305–17. http://dx.doi.org/10.1098/rsta.2009.0211.

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We analyse anticipating synchronization in chaotic systems with time-delay coupling. Two algorithms for extending the prediction horizon are considered. One of them is based on the design of a suitable coupling matrix compensating the phase lag in the time-delay feedback term of the slave system. The second algorithm extends the first by incorporating, in the coupling law, information from many previous states of the master and slave systems. We demonstrate the efficiency of both algorithms with the simple dynamical model of coupled unstable spirals, as well as with the coupled Rössler systems. The maximum prediction time attained for the Rössler system is equal to the characteristic period of chaotic oscillations.

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Romano, R. L., L. P. Damaceno, D. V. Magalhães, P. Parmananda, and H. Varela. "Electrical coupling of individual electrocatalytic oscillators." Chaos: An Interdisciplinary Journal of Nonlinear Science 32, no. 8 (2022): 083139. http://dx.doi.org/10.1063/5.0098339.

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The catalytic electro-oxidation of some small organic molecules is known to display kinetic instabilities, which reflect on potential and/or current oscillations. Under oscillatory conditions, those systems can be considered electrocatalytic oscillators and, therefore, can be described by their amplitude, frequency, and waveform. Just like mechanical oscillators, the electrocatalytic ones can be coupled and their dynamics can be changed by setting different coupling parameters. In the present work, we study the unidirectional coupling of electrocatalytic oscillators, namely, those comprehending the catalytic electro-oxidation of methanol and formic acid on polycrystalline platinum in acidic media under potentiostatic control. Herein, we explore two different scenarios (the coupling of compositionally identical and non-identical oscillators) and investigate the effects of the master's identity and of the coupling constant on the slave's dynamics. For the master (methanol)–slave (methanol) coupling, the oscillators exhibited phase lag synchronization and complete phase synchronization. On the other hand, for the master (formic acid)–slave (methanol) coupling, the oscillators exhibited complete phase synchronization with phase-locking with a 2:3 ratio, complete phase synchronization with phase-locking with a 1:2 ratio, phase lag synchronization, and complete phase synchronization. The obtained results suggest that both the master's identity and the coupling constant (sign and magnitude) are parameters that play an important role on the coupled systems, in such a way that even for completely different systems, synchronization could emerge by setting a suitable coupling constant. To the best of our knowledge, this is the first report concerning the electrical coupling of hidden N-shaped-negative differential resistance type systems.

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Ahmad, I., A. Saaban, A. Ibrahin, and M. Shahzad. "A Research on the Synchronization of Two Novel Chaotic Systems Based on a Nonlinear Active Control Algorithm." Engineering, Technology & Applied Science Research 5, no. 1 (2015): 739–47. http://dx.doi.org/10.48084/etasr.434.

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The problem of chaos synchronization is to design a coupling between two chaotic systems (master-slave/drive-response systems configuration) such that the chaotic time evaluation becomes ideal and the output of the slave (response) system asymptotically follows the output of the master (drive) system. This paper has addressed the chaos synchronization problem of two chaotic systems using the Nonlinear Control Techniques, based on Lyapunov stability theory. It has been shown that the proposed schemes have outstanding transient performances and that analytically as well as graphically, synchronization is asymptotically globally stable. Suitable feedback controllers are designed to stabilize the closed-loop system at the origin. All simulation results are carried out to corroborate the effectiveness of the proposed methodologies by using Mathematica 9.

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Wang, Guohao, and Liying Yu. "Differential Game Analysis of Scientific Crowdsourcing on Knowledge Transfer." Sustainability 11, no. 10 (2019): 2735. http://dx.doi.org/10.3390/su11102735.

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Scientific crowdsourcing based on knowledge transfer between enterprises has drawn wide attention. This paper constructs the Stackelberg master–slave game model and the benefit sharing model. Through the model comparison and numerical simulation, the knowledge transfer behavior and the revenue distribution mechanism of crowdsourcing initiator and solver in the context of scientific crowdsourcing are studied. The research shows that the knowledge transfer quality and the crowdsourcing total revenue under the benefit sharing state are better than the Stackelberg master–slave game under the leadership of the crowdsourcing initiator and when the revenue distribution coefficient between the crowdsourcing initiator and solver is within a certain range. The final revenue for each party in the benefit sharing state is higher than the one in the Stackelberg master–slave game state. In addition, the research finds that the knowledge coupling degree between the initiator and the solver has a positive impact on knowledge transfer and crowdsourcing benefits. The conclusions of this paper provide a theoretical basis for enterprises, especially for large-scale high-tech business to business enterprises, to transfer knowledge and distribute revenue and eventually improve their scientific crowdsourcing quality.

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Holló, Gábor, Brigitta Dúzs, István Szalai, and István Lagzi. "From Master–Slave to Peer-to-Peer Coupling in Chemical Reaction Networks." Journal of Physical Chemistry A 121, no. 17 (2017): 3192–98. http://dx.doi.org/10.1021/acs.jpca.7b00179.

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Turner, G. L., M. G. Milsted, and P. Hanks. "The Adaptation of Kron’s Method for Use With Large Finite-Element Models." Journal of Vibration and Acoustics 108, no. 4 (1986): 405–10. http://dx.doi.org/10.1115/1.3269363.

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Kron’s method of dynamic substructure coupling is modified and extended to a form which is well suited for use with large finite-element substructure models. It is shown how both mass condensation and modal truncation can be applied at the substructure level in a manner compatible with the Kron coupling procedure. Either master or slave freedoms may be used as coupling coordinates in the system model, thereby allowing complete flexibility at the substructure analysis stage and in particular, allowing the use of automatic master selection procedures. Substructures may be coupled either directly or through a flexible interlayer. System damping may thus be represented in a fairly general way with each substructure having its own (uniform) damping level but with the further provision of additional damping at the joining surfaces between substructures. The theory is illustrated by examples with simple mass-spring systems.

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Yokokohji, Y., and T. Yoshikawa. "Bilateral control of master-slave manipulators for ideal kinesthetic coupling-formulation and experiment." IEEE Transactions on Robotics and Automation 10, no. 5 (1994): 605–20. http://dx.doi.org/10.1109/70.326566.

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Guan, Peng, Yanting Ai, Chengwei Fei, and Yudong Yao. "Thermal Fatigue Life Prediction of Thermal Barrier Coat on Nozzle Guide Vane via Master–Slave Model." Applied Sciences 9, no. 20 (2019): 4357. http://dx.doi.org/10.3390/app9204357.

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The aim of this paper was to develop a master–slave model with fluid-thermo-structure (FTS) interaction for the thermal fatigue life prediction of a thermal barrier coat (TBC) in a nozzle guide vane (NGV). The master–slave model integrates the phenomenological life model, multilinear kinematic hardening model, fully coupling thermal-elastic element model, and volume element intersection mapping algorithm to improve the prediction precision and efficiency of thermal fatigue life. The simulation results based on the developed model were validated by temperature-sensitive paint (TSP) technology. It was demonstrated that the predicted temperature well catered for the TSP tests with a maximum error of less than 6%, and the maximum thermal life of TBC was 1558 cycles around the trailing edge, which is consistent with the spallation life cycle of the ceramic top coat at 1323 K. With the increase of pre-oxidation time, the life of TBC declined from 1892 cycles to 895 cycles for the leading edge, and 1558 cycles to 536 cycles for the trailing edge. The predicted life of the key points at the leading edge was longer by 17.7–40.1% than the trailing edge. The developed master–slave model was validated to be feasible and accurate in the thermal fatigue life prediction of TBC on NGV. The efforts of this study provide a framework for the thermal fatigue life prediction of NGV with TBC.

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KIM, JONG H., and SEUNG M. JUN. "SIMULATION OF HYDRODYNAMIC RAM OF AIRCRAFT FUEL TANK BY BALLISTIC PENETRATION AND DETONATION." International Journal of Modern Physics B 22, no. 09n11 (2008): 1525–30. http://dx.doi.org/10.1142/s021797920804702x.

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Airframe survivability and hydrodynamic ram effect of aircraft are investigated. Penetration and internal detonation of a simple tank and ICW(Intermediate Complexity Wing) are simulated by nonlinear explicit calculation. Structural rupture and fluid burst are analytically realized using general coupling of FSI(Fluid-Structure Interaction) and adaptive master-slave contact. Besides, multi-material Eulerian solver and porosity algorithm are employed to model explosive inside fuel and tank bays which are defined in multi-coupling surfaces. Structure and fluid results are animated on the same viewport for enhanced visualization.

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WAH WU, CHAI, GUO-QUN ZHONG, and LEON O. CHUA. "SYNCHRONIZING NONAUTONOMOUS CHAOTIC SYSTEMS WITHOUT PHASE-LOCKING." Journal of Circuits, Systems and Computers 06, no. 03 (1996): 227–41. http://dx.doi.org/10.1142/s0218126696000182.

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Pecora and Carroll1 have shown how two nonautonomous chaotic circuits driven by periodic forcing can be synchronized using the master-slave driving principle. However, in their scheme, the periodic forcing in both circuits needs to be phase-locked through some additional circuitry for the system to synchronize. In this paper, we show two ways in which this can be avoided. In the first scheme, the two circuits are connected in a master-slave driving configuration and the periodic forcing is included in the driving signal such that it eliminates the need for the slave circuit to have an external periodic forcing signal. In addition, we can recover the periodic forcing signal at the slave circuit. In the second scheme, the two circuits are connected in a mutual coupling configuration. The two circuits will synchronize regardless of what the periodic forcing signals of the two circuits are. In particular, the two periodic forcing signals could have different phases, different frequencies, or different shapes. We discuss two interpretations of these synchronization schemes. First, we consider them as communication systems when the periodic forcing signal is replaced by a properly encoded information signal. We illustrate this in a physical circuit implementation. Second, we consider them as synchronization schemes for nonidentical systems by considering the external forcing signal as an error signal due to the difference between the two systems.

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Jia, Lei, Xiangxi Kong, Juqian Zhang, Yunshan Liu, and Bangchun Wen. "Multiple-Frequency Controlled Synchronization of Two Homodromy Eccentric Rotors in a Vibratory System." Shock and Vibration 2018 (June 28, 2018): 1–12. http://dx.doi.org/10.1155/2018/4941357.

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Multifrequency controlled synchronization of two homodromy eccentric rotors is investigated. The vibrating screen with two rotors is a typical underactuated system. So, the model of the vibrating screen is converted to a synchronization motion problem. Firstly, the mechanical-electromagnetic coupling dynamical model of the vibrating system is established. And then the fuzzy PID method is used for the two motors which are based on the master-slave control strategy. The slave motor uses the method of the phase ratio to trace the master motor and achieve the synchronous motion. Through the simulation, the two rotors cannot reach the state of multifrequency self-synchronization. And, then, it is realized by multifrequency controlled synchronization. The article presents the motion trails of the vibrating system between one and two times and realizes the zero phase difference after each period. Finally, some experiments are used to verify the accuracy and effectiveness of the conclusion in the simulation and analysis of the feature of the movement tracks.

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Tu, Trieu-Khang, I.-Haur Tsai, Jia-Yush Yen, Tsu-Chin Tsao, and Mi-Ching Tsai. "Improved Haptic Transparency of Bilateral Control Using Torque-Measured Magnetic Coupling." Machines 9, no. 8 (2021): 172. http://dx.doi.org/10.3390/machines9080172.

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The integrity and transparency of a haptic feedback in a bilateral control is crucial for precise and accurate operators’ sensation during human–machine interactions. Conventional master and slave bilateral control systems are often subject to unknown or unwanted disturbances and dynamics in the actuators and powertrain linkages that hamper the haptic feedback integrity and transparency. Force sensor torque sensing and feedback control are required to mitigate these effects. In contrast to the conventional approach of introducing torque sensing using a mechanical spring, this paper introduces a magnetic coupling as a torque sensor to detect reaction torque between the human input and the master actuator. Disturbance observer-based torque feedback control is designed to suppress the disturbances and tailor the haptic transparency dynamics. Experimental results on a virtual reality interaction system, which involves the steering wheel bilateral control in a cyber-physical driving simulator system, demonstrate the feasibility and effectiveness of the proposed method with improved haptic integrity and transparency.

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Castrejón-Pita, A. A., and P. L. Read. "Synchronization in a coupled two-layer quasigeostrophic model of baroclinic instability – Part 1: Master-slave configuration." Nonlinear Processes in Geophysics 16, no. 4 (2009): 543–56. http://dx.doi.org/10.5194/npg-16-543-2009.

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Abstract. Synchronization is studied using a pair of diffusively-coupled, two-layer quasi-geostrophic systems each comprising a single baroclinic wave and a zonal flow. In particular, the coupling between the systems is in the well-known master-slave or one-way configuration. Nonlinear time series analysis, phase dynamics, and bifurcation diagrams are used to study the dynamics of the coupled system. Phase synchronization, imperfect synchronization (phase slips), or complete synchronization are found, depending upon the strength of coupling, when the systems are either in a periodic or a chaotic regime. The results of investigations when the dynamics of each system are in different regimes are also presented. These results also show evidence of phase synchronization and signs of chaos control.

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Zhang, Changfan, Mingjie Xiao, Jing He, et al. "Collaborative Control of Multimotor Systems for Fixed-Time Optimisation Based on Virtual Main-Axis Speed Compensation Structure." Complexity 2021 (July 28, 2021): 1–15. http://dx.doi.org/10.1155/2021/4113022.

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In response to the high-speed and high-precision collaborative control requirements of the multimotor system for filling, a new type of virtual master-axis control structure is proposed and a multimotor fixed-time optimized collaborative control algorithm is designed. Firstly, coupling relationship between virtual and slave motors is effectively established by designing a velocity compensation module for the virtual motor. Secondly, the sliding mode observer (SMO) is used to reconstruct the composite disturbance composed of motor parameter perturbation and load disturbance. Finally, the variable gain terminal sliding mode controller (SMC) is designed to ensure that each slave motor can track the given value within a fixed time. The fast convergence of the system can be proved by the fixed-time convergence theorem and Lyapunov’s stability theorem. The simulation results show that, compared with the traditional virtual main-axis control strategy, the proposed method is more effective for the tracking control of each slave motor in the initial stage.

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Hu, J. S., and Z. Y. Zhou. "Research on multi-motor coordinated control under load disturbance." Journal of Physics: Conference Series 2296, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1742-6596/2296/1/012002.

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Abstract With the iterative development of industrialization and automation, more and more mechanical and electrical equipment rely on the joint operation of multiple motors, and the efficient operation of mechanical and electrical equipment benefits from the reliable cooperative control of multiple motors. Therefore, to ensure the stability of multi-motor coordination control and improve the precision of multi-motor coordination control has important practical significance. In this paper, the multi-motor master-slave controls structure and ring-coupling control structure with random disturbance are simulated and analyzed, and it is verified that the annular coupling control structure has stronger anti-interference ability and higher control accuracy under random load disturbance in the case of four-motor coordinated control.

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Yang, Ping, Xiyuan Chen, and Junwei Wang. "Decoupling of Airborne Dynamic Bending Deformation Angle and Its Application in the High-Accuracy Transfer Alignment Process." Sensors 19, no. 1 (2019): 214. http://dx.doi.org/10.3390/s19010214.

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In the traditional airborne distributed position and orientation system (DPOS) transfer alignment process, the coupling angle between the dynamic deformation and body angular motion is not estimated or compensated, which causes the process to have low precision and long convergence time. To achieve high-precision transfer alignment, a decoupling method for the airborne dynamic deformation angle is proposed in this paper. The model of the coupling angle is established through mathematical derivation. Then, taking the coupling angle into consideration, angular velocity error and velocity error between the master INS and slave IMU are corrected. Based on this, a novel 27-state Kalman filter model is established. Simulation results demonstrate that, compared with the traditional transfer alignment model, the model proposed in this paper has faster convergence time and higher accuracy.

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Wang, Jiawei, Guanpu Wu, Bohua Sun, Fangwu Ma, Bilin Aksun-Guvenc, and Levent Guvenc. "Disturbance Observer-Smith Predictor Compensation-Based Platoon Control with Estimation Deviation." Journal of Advanced Transportation 2022 (August 25, 2022): 1–14. http://dx.doi.org/10.1155/2022/9866794.

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In the research of cooperative adaptive cruise control, the coupling relationship between the communication delay, the following time headway, and the string stability leads to a stringent limit on the minimum allowable following time headway. To deal with this limitation, this paper proposes the Disturbance Observer-Smith Predictor Compensation (DOB-SPC)-based Master-Slave architecture. The SPC is adopted to move the communication delays and actuator delays outside the feedback loop in the Master-Slave architecture. It theoretically realizes decoupling when parameters are estimated accurately and achieves zero-headway-string-stability for arbitrary values of communication delay. Subsequently, the robust performance of SPC with estimation deviation of vehicle model dynamic lag, actuator delay, and communication delay in practical application is discussed through the changing trend of the minimum string-stable time headway. To alleviate this problem, the DOB is designed to compensate for the interference caused by the perturbation of vehicle dynamic parameters and improve the estimation accuracy. The simulation results of a four-vehicular platoon show that the string stability and following accuracy are fully guaranteed by applying the proposed strategy, even with smaller headway in the presence of estimation deviation.

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CAI, JIANPING, MIHUA MA, and XIAOFENG WU. "SYNCHRONIZATION OF A CLASS OF MASTER–SLAVE NONAUTONOMOUS CHAOTIC SYSTEMS WITH PARAMETER MISMATCH VIA SINUSOIDAL FEEDBACK CONTROL." International Journal of Modern Physics B 25, no. 16 (2011): 2195–215. http://dx.doi.org/10.1142/s0217979211100254.

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In this paper, we investigate a master–slave synchronization scheme of two n-dimensional nonautonomous chaotic systems coupled by sinusoidal state error feedback control, where parameter mismatch exists between the external harmonic excitation of master system and that of slave one. A concept of synchronization with error bound is introduced due to parameter mismatch, and then the bounds of synchronization error are estimated analytically. Some synchronization criteria are firstly obtained in the form of matrix inequalities by the Lyapunov direct method, and then simplified into some algebraic inequalities by the Gerschgorin disc theorem. The relationship between the estimated synchronization error bound and system parameters reveals that the synchronization error can be controlled as small as possible by increasing the coupling strength or decreasing the magnitude of mismatch. A three-dimensional gyrostat system is chosen as an example to verify the effectiveness of these criteria, and the estimated synchronization error bounds are compared with the numerical error bounds. Both the theoretical and numerical results show that the present sinusoidal state error feedback control is effective for the synchronization. Numerical examples verify that the present control is robust against amplitude or phase mismatch.

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Chen, Xiaozhe, and Lingxuan Li. "Phase Synchronization Control of Two Eccentric Rotors in the Vibration System with Asymmetric Structure Using Discrete-Time Sliding Mode Control." Shock and Vibration 2019 (June 10, 2019): 1–17. http://dx.doi.org/10.1155/2019/7481746.

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Control synchronization of two eccentric rotors (ERs) in the vibration system with the asymmetric structure is studied to make the vibration system obtain the maximum excited resultant force and the driven power. Because this vibration system is essentially an underactuated system, a decoupling strategy for the control goal of the same phase motion between two ERs is proposed to reduce the order of state equation of the vibration system. According to the master-slave control scheme, the complex control objects are converted into the velocity control of the master motor and the phase control of the slave motor. Considering the self-adjusting of the vibration system as interference, controllers of the velocity and the phase difference are designed by applying the discrete-time sliding mode control, which is proved by Lyapunov theory. A vibration machine is designed for evaluating the performance of the proposed controllers. Two control schemes are presented: controlling one motor and controlling two motors, and two group experiments are achieved to investigate the dynamic coupling characteristic of the vibration system in the state of control synchronization. The experimental results show that control synchronization is an effective and feasible technology to remove the limitation of vibration synchronization.

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JANG, IK GYU, SAMUEL BYEONGJUN PARK, HONG SEONG PARK, and YUNG-HO JO. "NONRESTRAINT MASTER SYSTEM FOR SURGICAL ROBOTS." Journal of Mechanics in Medicine and Biology 17, no. 03 (2016): 1750051. http://dx.doi.org/10.1142/s0219519417500518.

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Purpose: To overcome the anisotropic characteristics caused by nonuniform friction and singularity in mechanical master interfaces in minimally invasive surgical robot systems, we developed a nonrestraint optical master interface. Materials and Methods: The interface was developed using high-resolution infrared cameras and small reflection markers attached on handheld tongs. We derived 7-degrees of freedom (DOF) motion of the tongs from the kinematic solution of three markers. The accuracy of 3-DOF rotational motion was examined to verify the spatial resolution. The manipulability of the developed nonrestraint master system was evaluated by comparing it with a mechanical master interface (Phantom Premium, SensAble Inc.). Results: The rotational discrepancies were less than 1.72[Formula: see text], 0.39[Formula: see text], and 0.87[Formula: see text] for roll, pitch, and yaw, respectively. The motion comparisons, including straight line, circle, and eight-shape motions, indicated that the nonrestraint master could achieve movements that are more natural. Discussion: In vitro tests showed the feasibility of the proposed nonrestraint optical master interface for use with surgical robots. Because the proposed interface allows natural motion capability, more intuitive surgical motions are possible. In addition, the motion range are expected to increase and the problems associated with master–slave coupling are expected to reduce by our nonrestraint master interface.

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Ai, Yue, Bo Pan, Yili Fu, and Shuguo Wang. "Design of a novel robotic system for minimally invasive surgery." Industrial Robot: An International Journal 44, no. 3 (2017): 288–98. http://dx.doi.org/10.1108/ir-07-2016-0181.

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Purpose Robot-assisted system for minimally invasive surgery (MIS) has been attracting more and more attentions. Compared with a traditional MIS, the robot-assisted system for MIS is able to overcome or reduce defects, such as poor hand-eye coordination, heavy labour intensity and limited motion of the instrument. The purpose of this paper is to design a novel robotic system for MIS applications. Design/methodology/approach A robotic system with three separate slave arms for MIS has been designed. In the proposed robot, a new mechanism was designed as the remote centre motion (RCM) mechanism to restrain the movement of instrument or laparoscope around the incision. Moreover, an improved instrument without coupling motion between wrist and grippers was developed to enhance its manipulability. A control system architecture was also developed, and an intuitive control method was applied to realize hand-eye coordination of the operator. Findings For the RCM mechanism, the workspace was analyzed and the positioning accuracy of the remote centre point was tested. The results show that the RCM mechanism can be applied to MIS. Furthermore, the master-slave trajectory tracking experiments reveal that slave robots are able to follow the movement of the master manipulators well. Finally, the feasibility of the robot-assisted system for MIS is proved by performing animal experiments successfully. Originality/value This paper offers a novel robotic system for MIS. It can accomplish the anticipated results.

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Lei, Youjian. "A Predictive Control Model for Master Slave Robotic Manipulator with RBF Neural Network." International Journal of Circuits, Systems and Signal Processing 15 (July 19, 2021): 617–22. http://dx.doi.org/10.46300/9106.2021.15.68.

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In recent years, manipulator control has been widely concerned, and its uncertainty is one of the focuses. As we all know, the manipulator is a MIMO nonlinear system, which has the characteristics of severe variable coupling, large time-varying amplitude of parameters and high degree of nonlinearity. Therefore, a lot of uncertain factors must be considered when designing the control algorithm of manipulator system. The predictive control algorithm adopts online rolling optimization, and in the process of optimization, feedback correction is carried out by the difference between the actual output and the reference output. It can iterate the predictive model and suppress the influence of some uncertain disturbances to a certain extent. Therefore, the design of predictive controller for robot is not only of theoretical significance, but also of great practical significance. The trajectory tracking problem is proposed in this paper, and a predictive control method for master slave robotic manipulator with sliding mode controller is designed. In addition, when external disturbances occurred, the approximation errors are compensated by the proposed control method. Finally, The results demonstrate that the stability of the controllers can be improved for the trajectory tracking errors.

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42

Argoud, R., and J. Muller. "Magnetically coupled crystal holder and liquid-helium cryostat for X-ray four-circle diffractometer studies between 5 and 300 K." Journal of Applied Crystallography 22, no. 6 (1989): 584–91. http://dx.doi.org/10.1107/s0021889889008629.

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A new low-temperature system for X-ray four-circle diffractometer studies down to 5 K has been developed. The crystal is mounted on a new holder which is magnetically coupled to the diffractometer. This coupling is achieved by mounting a master magnet in place of the classical goniometer head. This master magnet drives a slave magnet fixed on the new crystal holder, and therefore the crystal is indirectly oriented by the master magnet. This magnetically coupled crystal holder (MCCH) is enclosed in a helium-flow cryostat which remains stationary during the φ, χ and to movements. The χ value is limited to ±65° and ω to 40° for a 150 mm diameter χ circle. All the tests and data collections (from 5 to 15 d) gave accuracies on the intensities, cell parameters and atomic positions identical to those obtained with a classical goniometer head. No frost problem occurs with this apparatus. The MCCH may also have applications in controlled-atmosphere, high-pressure or vacuum investigations.

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Mao, Qinghua, Maomao Lu, Xuhui Zhang, Min Zeng, Jianbo Zhao, and Shikun Li. "Study on new frequency conversion control system and power balance control method of dual-motor for shearer traction unit." Advances in Mechanical Engineering 14, no. 7 (2022): 168781322211045. http://dx.doi.org/10.1177/16878132221104586.

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The drive system of shearer traction unit is affected by complex load interference and system structure, which results in the problem of unbalanced power of dual-motor of shearer traction unit. A new type of dual-motor frequency conversion control system for shearer traction unit with “common rectification and dual inverters” is designed. And a dual-motor power balance control method based on particle swarm optimization torque cross-coupled control is proposed. The new frequency conversion control system adopts a parallel structure of two inverter circuits with a common DC bus. Particle swarm optimization is used to optimize the PID control parameters of torque cross-coupling control, which solves the problem that it is difficult to gain optimal PID parameters. The control model is established using Matlab/Simulink simulation software. The proposed control method and the master-slave control method are compared by simulation. The results show that the control effect of proposed control method is better synchromization and power balance effect than the master-slave control method. The proposed control method is applied to dual-motor control of shearer traction unit for experimental verification. The results indicate that the proposed power balance control method realizes that the output torque ratio of dual-motor is between 0.9 and 1.1.

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Abhilash, Lakshman, Arijit Ghosh, and Vasu Sheeba. "Selection for Timing of Eclosion Results in Co-evolution of Temperature Responsiveness in Drosophila melanogaster." Journal of Biological Rhythms 34, no. 6 (2019): 596–609. http://dx.doi.org/10.1177/0748730419877315.

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Circadian rhythms in adult eclosion of Drosophila are postulated to be regulated by a pair of coupled oscillators: one is the master clock that is light sensitive and temperature compensated and the other that is a slave oscillator whose period is temperature sensitive and whose phase is reflected in the overt behavior. Within this framework, we reasoned that in populations of Drosophila melanogaster that have been artificially selected for highly divergent phases of eclosion rhythm, there may be changes in this network of the master-slave oscillator system, via changes in the temperature-sensitive oscillator and/or the coupling of the light- and temperature-sensitive oscillators. We used light/dark cycles in conjunction with different constant ambient temperatures and 2 different amplitudes of temperature cycles in an overall cool or warm temperature and analyzed phases, gate width, and normalized amplitude of the rhythms in each of these conditions. We found that the populations selected for eclosion in the morning ( early flies) do not vary their phases with change in temperature regimes, whereas the populations selected for eclosion in the evening ( late flies) show phase lability of up to ~5 h. Our results imply a genetic correlation between timing of behavior and temperature sensitivity of the circadian clock.

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Ismail, Kristian, Tri Desmana Rachmildha, Estiko Rijanto, and Yanuarsyah Haroen. "A Hybrid Cross Coupling - Master Slave Technique for Speed Synchronization of Multi PMSMs System Using PID Controller and On-Line Master Selector." International Journal on Electrical Engineering and Informatics 11, no. 1 (2019): 183–94. http://dx.doi.org/10.15676/ijeei.2019.11.1.11.

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Nie, Lingcong, Xindi Xu, Yan Li, Weiyu Jiang, Yiwen Qi, and Yanhui Liu. "Adaptive event-triggered control for master-slave switched systems subject to attacked state-dependent switching law." Transactions of the Institute of Measurement and Control 43, no. 9 (2021): 1958–70. http://dx.doi.org/10.1177/0142331220985945.

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This paper investigates adaptive event-triggered [Formula: see text] control for network-based master-slave switched systems subject to actuator saturation and data injection attacks. It is an important and unrecognised issue that the switching signal is affected from both event-triggering scheme and network attacks. An adaptive event-triggering scheme is proposed that can adjust the triggering frequency through a variable threshold based on system performance. Furthermore, considering the impacts of transmission delays and actuator saturation, an event-triggered time-delay error switched system is developed. Subsequently, by utilizing piecewise Lyapunov functional technique, sufficient conditions are derived to render the time-delay error switched system to have an [Formula: see text] performance level. In particular, the coupling between switching instants and data updating instants is analyzed during the system performance analysis. Moreover, sufficient conditions for the desired state-feedback controller gains and event-triggering parameter are presented. Finally, a numerical example is given to verify the effectiveness of the proposed method.

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Chen, H.-K., and T.-N. Lin. "Synchronization of chaotic symmetric gyros by one-way coupling conditions." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 217, no. 3 (2003): 331–40. http://dx.doi.org/10.1243/095440603762869993.

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A simple satellite is a symmetric gyro. Satellites are used for communications, weather forecasts, surveying and in several other scientific and military applications. In particular, for military use secure communications are very important. As chaotic signals are usually broadband and noise like, synchronized chaotic systems can be used as cipher generators for secure communication. This paper presents chaos synchronization of two identical chaotic motions of symmetric gyros. It has been demonstrated that applying four different kinds of one-way coupling conditions can synchronize two identical chaotic systems. The sign of the sub-Liapunov exponent has been used as an indicator for the occurrence of chaos synchronization. It has also been found that when chaos synchronization occurs the positive major sub-Liapunov exponent transverses the zero value and becomes negative for the last time. Chaos synchronization can also be shown by phase trajectory. In addition, synchronization time is also examined. Furthermore, it has been found that different distances of the initial conditions between the master system and slave system do not affect the occurrence of chaos synchronization.

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Jian, Zhang, and Liu Kun. "Rotational speed control of magnetic coupling with variable damping method." Mechanics & Industry 21, no. 4 (2020): 406. http://dx.doi.org/10.1051/meca/2020027.

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Permanent Magnetic Coupling (PMC) is used in underwater vehicle to transmit torque from the motor to propeller without leakage and friction. Output rotational speed stability of PMC is an important index indicating the PMC output makes smaller vibration. To improve the stability of the output rotational speed, PMC dynamic characteristic was analyzed based on Lagrange equation in this paper. The dynamic characteristic was indicated by the angular phase generated by the master rotor and the slave rotor. The angular phase varied with the damping coefficient, torsional rigidity and rotational inertia of PMC. These parameters' influence on the angular phase was analyzed and the results revealed the rules between these parameters and the angular phase. Based on the rules, a variable damping method was proposed to control the angular phase. The angular phase changed smoothly with this method that was used to design a variable damping controller based on electromagnetic damping effect principle. This method was verified by theoretical calculation and finite element analysis (FEA). Finally, a novel variable damping PMC was designed to improve the output rotational speed stability of PMC.

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Laschet, Gottfried, Jürgen Jakumeit, and Stefan Benke. "Thermo-mechanical analysis of cast/mould interaction in casting processes." International Journal of Materials Research 95, no. 12 (2004): 1087–96. http://dx.doi.org/10.1515/ijmr-2004-0199.

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Abstract The numerical analysis of the thermo-mechanical interaction between the cast part and mould in casting processes requires a strong coupling between the thermal and mechanical simulation. This includes a 3-D frictionless contact algorithm and a model to describe the local heat transfer between part and mould as a function of the contact pressure or the formation of a local gap between both domains. Several features suitable for the analysis of solidification processes have been introduced in the classical master/slave contact algorithm like a temperature-dependent penalty factor and implemented in the software package CASTS. Benchmark tests and two industrial casting applications illustrate the correctness of the developed thermo-mechanical program and the ability to simulate complex cast parts.

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Eberle, Henry, Slawomir J. Nasuto, and Yoshikatsu Hayashi. "Anticipation from sensation: using anticipating synchronization to stabilize a system with inherent sensory delay." Royal Society Open Science 5, no. 3 (2018): 171314. http://dx.doi.org/10.1098/rsos.171314.

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We present a novel way of using a dynamical model for predictive tracking control that can adapt to a wide range of delays without parameter update. This is achieved by incorporating the paradigm of anticipating synchronization (AS), where a ‘slave’ system predicts a ‘master’ via delayed self-feedback. By treating the delayed output of the plant as one half of a ‘sensory’ AS coupling, the plant and an internal dynamical model can be synchronized such that the plant consistently leads the target’s motion. We use two simulated robotic systems with differing arrangements of the plant and internal model (‘parallel’ and ‘serial’) to demonstrate that this form of control adapts to a wide range of delays without requiring the parameters of the controller to be changed.

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Journal articles on the topic 'Master-slave coupling'

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