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Journal articles on the topic 'Displacement controlled'

Author: Grafiati

Published: 11 December 2022

Last updated: 26 January 2023

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1

DENGLER, J., and M. SCHMIDT. "THE DYNAMIC PYRAMID—A MODEL FOR MOTION ANALYSIS WITH CONTROLLED CONTINUITY." International Journal of Pattern Recognition and Artificial Intelligence 02, no. 02 (June 1988): 275–86. http://dx.doi.org/10.1142/s0218001488000170.

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The Dynamic Pyramid is a model to solve the correspondence problem of image sequences. A robust estimation of local displacements is combined with controlled continuity constraints. At the heart of the model is the functional of an elastic membrane whose elastic constants are subject to variation. The continuity control function is derived from the tension in the displacement vector field at gray value edges. The displacement term of the functional is based on robust local binary correlations derived from the signs of the bandpass filtered images. The basic representation of the model is the pyramid: The original images are converted into Laplacian pyramids, the signs of which are the features to determine the local displacements as well as the continuity control function. The vector field is built up as a pyramid from coarse to fine, giving the final displacement vector field at the finest level.

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2

Yin, Jingjing, Huaijian Li, Lingdi Kong, Junwei Cheng, Tonghui Niu, Xiaonan Wang, and Peizhi Zhuang. "Analytical Solution for Elastic Analysis around an Ellipse with Displacement-Controlled Boundary." Mathematical Problems in Engineering 2022 (June 8, 2022): 1–11. http://dx.doi.org/10.1155/2022/2148947.

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This paper presents novel analytical solutions for the analysis of an elliptical cavity within an infinite plane under plane strain conditions, considering typical displacement-controlled boundaries at the inner cavity and biaxial stresses at infinity. The problem is investigated by the plane theory of elasticity using Muskhelishvili’s complex variable method. The complex displacement boundary conditions are represented using the conformal mapping technique and Fourier series, and stress functions are evaluated using Cauchy’s integral formula. The proposed solutions are validated at first by comparing them with other existing solutions and then used to show the influences of displacement vectors on the distributions of induced stresses and displacements. The new solutions may provide useful analytical tools for stress and displacement analysis of an elliptical hole/opening in linear elastic materials which are common in many engineering problems.

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3

Fan, Hai Bo, Jian Jin, and Ke Li Xing. "Research of Electro-Hydraulic Proportional Variable Displacement Piston Pump Using Fuzzy Logic Control." Advanced Materials Research 655-657 (January 2013): 1179–88. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1179.

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Electro-hydraulic proportional variable displacement piston pump is widely used in various fields because of energy-saving, low noise and advanced control technology. In this study, a fuzzy logic controller was used in a flow and pressure integrated controlled electro-hydraulic proportional variable displacement piston pump’s control system. The simulation model of variable displacement pump was built based on AMESim, and the model of control system with fuzzy logic controlled was built in Simulink. This study research the characteristics of electro-hydraulic proportional variable displacement piston pump’s control system through co-simulation.

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4

Chetwynd, D. G., X. Liu, and S. T. Smith. "A controlled-force stylus displacement probe." Precision Engineering 19, no. 2-3 (October 1996): 105–11. http://dx.doi.org/10.1016/s0141-6359(96)00008-6.

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5

Sakakibara, Keita, Leo A. Joyce, Taizo Mori, Takuya Fujisawa, Shagufta H. Shabbir, Jonathan P. Hill, Eric V. Anslyn, and Katsuhiko Ariga. "A Mechanically Controlled Indicator Displacement Assay." Angewandte Chemie 124, no. 38 (August 29, 2012): 9781–84. http://dx.doi.org/10.1002/ange.201203402.

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6

Sakakibara, Keita, Leo A. Joyce, Taizo Mori, Takuya Fujisawa, Shagufta H. Shabbir, Jonathan P. Hill, Eric V. Anslyn, and Katsuhiko Ariga. "A Mechanically Controlled Indicator Displacement Assay." Angewandte Chemie International Edition 51, no. 38 (August 29, 2012): 9643–46. http://dx.doi.org/10.1002/anie.201203402.

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7

Suresh, Srinivasan A., Amar Hajj-Ahmad, Elliot W. Hawkes, and Mark R. Cutkosky. "Forcing the issue: testing gecko-inspired adhesives." Journal of The Royal Society Interface 18, no. 174 (January 2021): 20200730. http://dx.doi.org/10.1098/rsif.2020.0730.

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Materials are traditionally tested either by imposing controlled displacements and measuring the corresponding forces, or by imposing controlled forces. The first of these approaches is more common because it is straightforward to control the displacements of a stiff apparatus and, if the material suddenly fails, little energy is released. However, when testing gecko-inspired adhesives, an applied force paradigm is closer to how the adhesives are loaded in practice. Moreover, we demonstrate that the controlled displacement paradigm can lead to artefacts in the assumed behaviour unless the imposed loading trajectory precisely matches the deflections that would occur in applications. We present the design of a controlled-force system and protocol for testing directional gecko-inspired adhesives and show that results obtained with it are in some cases substantially different from those with controlled-displacement testing. An advantage of the controlled-force testing approach is that it allows accurate generation of adhesive limit curves without prior knowledge of the expected behaviour of the material or the loading details associated with practical applications.

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8

Gehrmann, Oliver, Nils Hendrik Kröger, and Alan Muhr. "Displacement-controlled fatigue testing of rubber is not strain-controlled." International Journal of Fatigue 145 (April 2021): 106083. http://dx.doi.org/10.1016/j.ijfatigue.2020.106083.

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9

Wu, Yun Feng, Zhu Ming, and Ke Chang Fu. "Feedforward and Feedback Control of an Inverted Pendulum." Advanced Materials Research 328-330 (September 2011): 2194–97. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.2194.

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A feedforward-feedback controller (FFC), which is constructed by a feedforward controller and conventional PID in the global control scheme, is presented to control Inverted Pendulum in this paper. The angle of the swing-bar is defined as controlled variable for the controlled system and the displacement of swing-bar is taken as the disturbance. The feedback controller is used to control the angle and the feedforward controller is used to compensate for the displacement. Experiment results show that the proposed controller is of better control performance than the PID control scheme with two loops and the neural network control (NNC) scheme designed by Googol Technology (HK) Ltd.

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10

Gluck, J., Y. Ribakov, and A. N. Dancygier. "Selective Control of Base-Isolated Structures with CS Dampers." Earthquake Spectra 16, no. 3 (August 2000): 593–606. http://dx.doi.org/10.1193/1.1586129.

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Addition of dampers to a base isolator reduces base displacements but may increase floor accelerations and interstory drifts. This paper presents a “selective control approach” for the design of base-isolated active controlled structures with Controlled Stiffness Dampers (CSD). According to this approach the dampers are activated only within a given range of the base displacement. The optimal damping forces are calculated according to structure's displacements and velocities. However, because of the CS dampers' structure the actual application of the forces is independent of the displacement and the velocity that are transferred to the device. These forces depend only on the geometry and on the mechanical properties of the devices' springs. The efficiency of the proposed method is demonstrated in a numerical example.

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11

Bui, Le Hai, Anh Tung Le, Binh Van Bui, and Hoan Thai Tat Nguyen. "FUZZY SLIDING MODE CONTROL OF A STRUCTURE BASED ON HEDGE ALGEBRAS CONTAINING INPUT TIME DELAY." Vietnam Journal of Science and Technology 57, no. 4 (July 24, 2019): 513. http://dx.doi.org/10.15625/2525-2518/57/4/13167.

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In this paper, the authors present the sliding mode control problem of a structure using hedge-algebras-based fuzzy controller considering the impact of time delay (de-sHAC). Controlled model is a structure subjected to earthquake excitations. Numerical simulations are implemented in order to show advantages of the proposed controller. Obtained results include: variation of maximum displacement and maximum absolute acceleration versus time delay; time responses of displacement, absolute acceleration and control force of the structure in the uncontrolled case, the controlled case using the hedge-algebras-based fuzzy controller with input time delay (de-HAC) and the de-sHAC.

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12

Guclu, R., and A. Sertbas. "Evaluation of Sliding Mode and Proportional-Integral-Derivative Controlled Structures with an Active Mass Damper." Journal of Vibration and Control 11, no. 3 (March 2005): 397–406. http://dx.doi.org/10.1177/1077546305051202.

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In this paper, both a sliding mode controller (SMC) and proportional-integral-derivative (PID) controller are designed for a multi-degrees-of-freedom structure, which has an active mass damper (AMD) to suppress earthquakeor wind-induced vibration. Since the model might have uncertainties and/or parameter changes, a SMC has been included because of its robust character and performance. The structural system has five degrees of freedom and has been simulated against an initial displacement of the first floor. At the end of the paper, we present the time histories of the first floor, top floor, and AMD displacements, the control voltage and frequency response of the uncontrolled, PID controlled, and sliding mode controlled structures, and we discuss the results.

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13

Pretti, Giuliano, William M. Coombs, and Charles E. Augarde. "A displacement-controlled arc-length solution scheme." Computers & Structures 258 (January 2022): 106674. http://dx.doi.org/10.1016/j.compstruc.2021.106674.

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14

Snyder, V. A., M. A. Vázquez, G. Martínez, L. Ramírez, and A. Hadas. "Controlled Displacement Technique for Measuring Soil Friability." Soil Science Society of America Journal 59, no. 1 (January 1995): 44–52. http://dx.doi.org/10.2136/sssaj1995.03615995005900010007x.

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15

Kafle, Bidur, Nelson T. K. Lam, Emad F. Gad, and John Wilson. "Displacement controlled rocking behaviour of rigid objects." Earthquake Engineering & Structural Dynamics 40, no. 15 (February 22, 2011): 1653–69. http://dx.doi.org/10.1002/eqe.1107.

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16

Gülbahçe, Erdi, and Mehmet Çelik. "Fuzzy logic aided PPF controller design to active vibration control of a flexible beam." Journal of Structural Engineering & Applied Mechanics 4, no. 3 (September 30, 2021): 184–95. http://dx.doi.org/10.31462/jseam.2021.03184195.

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This paper presents a fuzzy-logic-based observer and a positive position feedback controller to reduce a standard beam's free vibrations using a piezoelectric actuator. It is aimed that fuzzy-logic-based observer is used as feed-through and improves the overall performance of the PPF controller. For this aim, the cantilever beam and a piezoelectric patch are initially numerically modeled using the finite element method considering the close loop control algorithm. The displacement and strain responses results are compared with the experimental model. Then, two controllers are applied to the designed system: positive position feedback (PPF) and fuzzy-logic-based positive position feedback (FLBPPF). The uncontrolled and controlled system responses are investigated and compared in terms of the linear strain and tip displacement results. Using the FLBPPF controller, the settling times of controlled systems are decreased by about 20.7% and 41.6% regarding the linear strain and tip displacement response compared to the PPF controller.

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17

Wu, H.-W., and C.-B. Lee. "Self-Tuning Adaptive Speed Control of a Pump/Inverter-Controlled Hydraulic Motor System." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 209, no. 2 (May 1995): 101–14. http://dx.doi.org/10.1243/pime_proc_1995_209_371_02.

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In a hydrostatic transmission system the speed of the fixed displacement hydraulic motor can be controlled by varying either the pump displacement or the pump speed. The change of pump speed can be achieved via an inverter which governs the speed of an induction motor. In this paper, both the pump-controlled hydraulic motor system and the inverter-controlled hydraulic motor system are studied. A microcomputer-based self-tuning adaptive controller was designed and applied to both systems. A series of simulations and experiments was performed. The results show that both the pump-controlled system and the inverter-controlled system can be regulated to maintain a desired response under different speed commands, load inertias, oil temperatures and an external disturbance.

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18

Crone, W. C., P. H. Leo, and T. W. Shield. "Comparisons between load controlled and displacement controlled extension of NiTi wires." Scripta Materialia 38, no. 12 (May 1998): 1825–28. http://dx.doi.org/10.1016/s1359-6462(98)00101-8.

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19

Chen, R. P., B. Zhu, and W. J. Ni. "Uplift tests on full-scale pipe segment in lumpy soft clay backfill." Canadian Geotechnical Journal 53, no. 4 (April 2016): 578–88. http://dx.doi.org/10.1139/cgj-2015-0084.

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Upheaval buckling of pipelines caused by thermal- and pressure-induced loading is an important issue in pipeline design. The uplift capacity of pipelines is determined by the pipe–soil interaction during pipeline upheaval in soil. Pipelines to be installed in soft clay are usually placed into trenches and then backfilled. In this paper, a set of test devices were developed and a series of full-scale model tests were carried out on a pipe segment buried in lumpy soft clay backfill, including backfilling tests, load-controlled uplift tests, and a displacement-controlled test. Eight total pressure transducers were embedded in the wall of the pipe segment to measure soil pressures on the pipe segment, and five linear variable differential displacement transducers (LVDTs) were arranged to record the vertical displacement of the pipe segment and the surface of the soft clay ground. The stabilizing force keeping the pipe segment in place during the backfilling process was found to fit a nearly linear relationship with the dimensionless undrained shear strength of soft clay. The variation of soil pressures on the pipe segment during uplift loading was significantly affected by the buried depth of the pipe segment and the undrained shear strength of the soil. For all present load-controlled tests in lumpy soft clay backfill, the test ultimate uplift resistances were only about 19%–81% of the results calculated by the Det Norske Veritas approach. Mainly due to the voids’ compression, shearing and strain softening of lumpy soft clay backfill, the difference between initial and stable displacements in a loading step for a load-controlled test or initial and stable loads in a displacement step for a displacement-controlled test is remarkable. The limits of uplift resistances are recommended for the instant and sustaining behaviors of the pipe segment, respectively.

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20

CARNEIRO, RÚBIA BORGES, SUZANA MOREIRA AVILA, and JOSÉ LUÍS VITAL DE BRITO. "PARAMETRIC STUDY ON MULTIPLE TUNED MASS DAMPERS USING INTERCONNECTED MASSES." International Journal of Structural Stability and Dynamics 08, no. 01 (March 2008): 187–202. http://dx.doi.org/10.1142/s0219455408002600.

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In this paper, the dynamic performance of a controlled high building is numerically investigated considering the effects of different numbers of mass dampers and their interconnection. The numerical analysis is conducted on a 20-story building considered as a shear frame and reduced to an SDOF system by means of the mode-superposition method. The system is subjected to harmonic load. Numerical searches are conducted based on the Min. Max. procedure in order to obtain efficient interconnected (I) multiple tuned mass dampers (MTMD). Comparisons are made among the uncontrolled system, the system controlled by non-interconnected (NI) MTMD, and the system controlled by (I) MTMD in frequency and time domain. Both (NI) and (I) MTMD reduce significantly frequency response peak amplitude. It is observed that the (I) MTMD produces great reductions on maximum displacement, rms displacement, steady-state peak response, and story displacements close to the reductions obtained by (NI) MTMD using review parameters. Mass maximum displacements analysis shows that the space required for (I) MTMD installation is smaller than (NI) MTMD.

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21

Oumarou, Tahirou Assane, and Erman Evgin. "Cyclic behaviour of a sand steel plate interface." Canadian Geotechnical Journal 42, no. 6 (December 1, 2005): 1695–704. http://dx.doi.org/10.1139/t05-083.

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This paper presents the results of an experimental study on the mechanical behaviour of an interface between sand and a steel plate. A simple shear type interface apparatus is used. Tests are conducted under a two-way, displacement-controlled cyclic loading condition. The effects of the initial soil density, number of displacement cycles, magnitude of normal stress, and amplitude of tangential displacement on the cyclic response of the interface are investigated. The interface behaviour is presented in terms of the shear stress mobilized on the interface, the changes taking place in sample height, and the components of tangential displacements resulting from soil deformation and from slip between the soil and the steel plate during displacement cycles.Key words: cyclic behaviour, soilstructure interface, simple shear, slip, laboratory testing.

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22

Zambanini, C., and D. S. Kieffer. "Hybrid InSARTrac for monitoring interglacial movement patterns." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012028. http://dx.doi.org/10.1088/1755-1315/1124/1/012028.

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Abstract InSARTrac is a hybrid 3D monitoring method, for which controlled field measurements have indicated significant potential for geotechnical applications. Various approaches can be taken to derive 3D displacements from InSAR measurements, such as combining multiple InSAR ascending and descending satellite passes or combining multi-geometrical radar datasets from ground and satellite based radars. InSARTrac is a cost-effective solution requiring only one terrestrial InSAR device and a camera used for feature tracking. This study summarizes the results of glacial displacement measurements that were conducted to test the InSARTrac methodology. The InSARTrac 3D displacement vectors show details concerning glacial retreat dynamics related to a combination of ice flow and volume loss. By extrapolating prior results obtained from controlled field measurements, the resultant displacement vector orientations have an estimated angular error of approximately 5 degrees. With a fixed camera mount and longer monitoring times this error can be further reduced. Current studies are focused on deploying InSARTrac to investigate its potential for landslide and geostructure monitoring.

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23

Jasiński, Radosław, Krzysztof Stebel, and Jarosław Domin. "Application of the DIC Technique to Remote Control of the Hydraulic Load System." Remote Sensing 12, no. 21 (November 9, 2020): 3667. http://dx.doi.org/10.3390/rs12213667.

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Displacements or deformations of materials or structures are measured with linear variable differential transducers (LVDT), fibre optic sensors, laser sensors, and confocal sensor systems, while strains are measured with electro-resistant tensometers or wire strain gauges. Measurements significantly limited to a point or a small area are the obvious disadvantage of these measurements. Such disadvantages are eliminated by performing measurements with optical techniques, such as digital image correlation (DIC) or electronic speckle pattern interferometry (ESPI). Many devices applied to optical measurements only record test results and do not cooperate with the system that exerts and controls load. This paper describes the procedure for preparing a test stand involving the Digital Image Correlation system ARAMIS 6M for remote-controlled loading. The existing hydraulic power pack (ZWICK-ROELL) was adapted by installing the modern NI cRIO-9022 controller operating under its own software developed within the LABVIEW system. The application of the DIC techniques to directly control load on the real structure is the unquestionable innovation of the described solution. This led to the elimination of errors caused by the test stand susceptibility and more precise relations between load and displacements/strains which have not been possible using the previous solutions. This project is a synergistic and successful combination of civil engineering, computer science, automatic control engineering and electrical engineering that provides a new solution class. The prepared stand was tested using two two-span, statically non-determinable reinforced concrete beams loaded under different conditions (force or displacement). The method of load application was demonstrated to affect the redistribution of bending moments. The conducted tests confirmed the suitability of the applied technique for the remote controlling and recording of test results. Regardless of the load control method (with force or displacement), convergent results were obtained for the redistribution of bending moments. Force-controlled rotation of the beam section over the support was over 50% greater than rotation of the second beam controlled with an increase in the displacement.

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24

Wei, Mingyao, Jishan Liu, Xiating Feng, Chunguang Wang, and Fubao Zhou. "Evolution of shale apparent permeability from stress-controlled to displacement-controlled conditions." Journal of Natural Gas Science and Engineering 34 (August 2016): 1453–60. http://dx.doi.org/10.1016/j.jngse.2016.07.012.

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25

Liu, Jishan, Zhongwei Chen, Derek Elsworth, Xiexing Miao, and Xianbiao Mao. "Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions." Fuel 90, no. 10 (October 2011): 2987–97. http://dx.doi.org/10.1016/j.fuel.2011.04.032.

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26

Alaca, B. Erdem, K. Bugra Toga, Orhan Akar, and Tayfun Akin. "Strain-controlled bulge test." Journal of Materials Research 23, no. 12 (December 2008): 3295–302. http://dx.doi.org/10.1557/jmr.2008.0395.

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A closed-loop approach is adopted to implement strain rate control during the bulge test. Due to the difficulty of measuring strains directly, the technique is based on the conversion of displacement measurements to the corresponding strains using the plane-strain formulation. The necessary temporal evolution of the midpoint displacement of a rectangular diaphragm is derived under the condition of constant strain rate and is imposed as a control criterion. The technique is demonstrated on 500-nm-thick Au diaphragms by applying strain rates ranging from 2 × 10−6 to 2 × 10−4 s–1. By measuring the corresponding yield strength values, a strain rate sensitivity of 0.11 is obtained, which is close to what was previously reported on similar specimens using the microbending test.

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27

Amodio, Alessia, Bin Zhao, Alessandro Porchetta, Andrea Idili, Matteo Castronovo, Chunhai Fan, and Francesco Ricci. "Rational Design of pH-Controlled DNA Strand Displacement." Journal of the American Chemical Society 136, no. 47 (November 14, 2014): 16469–72. http://dx.doi.org/10.1021/ja508213d.

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28

Tjoa, G. L., and R. den Boef. "A remote-controlled calibration device for displacement transducers." Journal of Physics E: Scientific Instruments 19, no. 11 (November 1986): 907–10. http://dx.doi.org/10.1088/0022-3735/19/11/003.

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29

TAKANEZAWA, Daimatsu, Noki OUCHI, Yusuke TAYAMA, and Moriyasu KANARI. "Developmental Study of a Displacement controlled Nanoindentation tester." Proceedings of Ibaraki District Conference 2003 (2003): 19–20. http://dx.doi.org/10.1299/jsmeibaraki.2003.19.

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30

Al-Aukaily, Alabbas, and Michael H. Scott. "Sensitivity Analysis for Displacement-Controlled Finite-Element Analyses." Journal of Structural Engineering 144, no. 3 (March 2018): 04017222. http://dx.doi.org/10.1061/(asce)st.1943-541x.0001983.

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31

Busquets, Enrique, and Monika Ivantysynova. "Temperature Prediction of Displacement Controlled Multi-Actuator Machines." International Journal of Fluid Power 14, no. 1 (January 2013): 25–36. http://dx.doi.org/10.1080/14399776.2013.10781066.

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32

Lombos, B. A., D. Côté, J. P. Dodelet, M. F. Lawrence, and J. I. Dickson. "Thermodynamic equilibrium displacement controlled epitaxial growth of GaAs." Journal of Crystal Growth 79, no. 1-3 (December 1986): 455–62. http://dx.doi.org/10.1016/0022-0248(86)90477-x.

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33

Cordo, Paul, S. C. Gandevia, J. P. Hales, David Burke, and G. Laird. "Force and displacement-controlled tendon vibration in humans." Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section 89, no. 1 (February 1993): 45–53. http://dx.doi.org/10.1016/0168-5597(93)90084-3.

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34

Yan, Yan, An Zhong Liu, and Dao Xiang Zhou. "Studies on Strain Fatigue Crack Growth Rate Controlled by Displacement or Load of 16MnR Steel." Advanced Materials Research 243-249 (May 2011): 5680–85. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5680.

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In order to understand the strain fatigue crack growth rate of pressure vessel steel controlled by displacement or load, we did experiments on strain fatigue of 16MnR steel and describe the fatigue with the energy method. We have obtained delayed cycle curve of strain fatigue controlled by displacement or load and calculated the J-integral at crack tip. In order to compare strain fatigue crack growth rates of 16MnR steel on two conditions，we compute weighted means of the strain fatigue controlled by displacement or load. Comparing two kinds of fatigue growth rate, it is obvious that the crack growth rate of fatigue controlled by displacement is greater than that controlled by load. All experiments show that compress plastic energy is higher, the fatigue growth rate of 16MnR is lower.

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35

Yang, Guan Zhong, and Ji Hai Jiang. "Displacement Characteristics of Variable Hydraulic Transformer." Applied Mechanics and Materials 543-547 (March 2014): 741–46. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.741.

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A new kind of hydraulic transformer, called variable hydraulic transformer (VHT), has been proposed to control its load flow rate. The displacement characteristics of VHT are investigated in detail. The mathematic models are concluded and optimized. Matlab is used to simulate and calculate, finding that there are 5 controlled angles of the port plate that can help define displacement characteristics of VHT. The relationships between the displacement characteristics and the structure in VHT are shown. The results demonstrate the performance laws of VHT when the controlled angles of the port plate and of the swash plate change.

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36

An, Xiaoyu, Zijie Meng, Yanfeng Wang, and Junwei Sun. "Proportional-Integral-Derivative Control of Four-Variable Chaotic Oscillatory Circuit Based on DNA Strand Displacement." Journal of Nanoelectronics and Optoelectronics 16, no. 4 (April 1, 2021): 612–23. http://dx.doi.org/10.1166/jno.2021.2994.

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DNA molecular computing based on DNA strand displacement (DSD) technology is a potential computing model. Different functions can be realized by constructing DNA strand displacement analog circuit and analyzing its dynamic characteristics. In this paper, exploiting chemical reaction networks (CRNs) as the middle layer, a new chaotic oscillation circuit is constructed via DNA strand displacement and controlled by PID controller. The design of four-variable chaotic oscillatory circuit requires the combination and cascade by five DNA reaction modules. Based on the theory of stability and design principle of controller, the proportion terms, integration terms, and differentiation terms are added to chaotic oscillatory circuit for implementing PID controller. PID controller is implemented by five DNA reaction modules to stabilize the chaotic oscillation circuit. The validity of reaction modules circuit with their corresponding DSD reaction modules and controller is verified by visual DSD and Matlab. The PID controller may have better performance than PI controller, and it is an extension of PI controller.

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37

Xia, Zeyang, and Jie Chen. "Biomechanical validation of an artificial tooth–periodontal ligament–bone complex for in vitro orthodontic load measurement." Angle Orthodontist 83, no. 3 (September 12, 2012): 410–17. http://dx.doi.org/10.2319/041712-317.1.

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ABSTRACT Objectives: To develop an artificial tooth–periodontal ligament (PDL)–bone complex (ATPBC) that simulates clinical crown displacement. Material and Methods: An ATPBC was created. It had a socket hosting a tooth with a thin layer of silicon mixture in between for simulating the PDL. The complex was attached to a device that allows applying a controlled force to the crown and measuring the resulting crown displacement. Crown displacements were compared to previously published data for validation. Results: The ATPBC that had a PDL made of two types of silicones, 50% gasket sealant No. 2 and 50% RTV 587 silicone, with a thickness of 0.3 mm, simulated the PDL well. The mechanical behaviors (1) force-displacement relationship, (2) stress relaxation, (3) creep, and (4) hysteresis were validated by the published results. Conclusion: The ATPBC simulated the crown displacement behavior reported from biological studies well.

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38

Warren, Oden L., Seth A. Downs, and Thomas J. Wyrobek. "Challenges and interesting observations associated with feedback-controlled nanoindentation." International Journal of Materials Research 95, no. 5 (May 1, 2004): 287–96. http://dx.doi.org/10.1515/ijmr-2004-0064.

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Abstract Accurate feedback control of the nanoindentation process is particularly challenging from the perspectives of many orders of magnitude change in contact stiffness and the use of the ramp/hold/ramp protocol. The conventional proportional-integral-derivative feedback control algorithm is not well suited for such an application. Here we provide a description and present performance data for a newly developed digital control algorithm that augments the familiar proportional-integral-derivative routine with an adaptive feedforward control having inputs related to open-loop device physics and encountered contact mechanics. This novel approach results in reproducing even a steep demand ramp with minimal feedback error. Additionally, we discuss interesting observations made with respect to the varied displacement-controlled nanoindentation responses of materials. Metals, in particular, are found to expose especially rich nanomechanical phenomena when the force-displacement curves are measured under displacement control. The findings of this study nicely illustrate the decided scientific advantages of displacement control over load control.

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Sun, Shuang Shuang, Xing Chao Liu, and Mei Lu. "Free Vibration of High-Rise Chemical Tower Controlled by Super-Elastic Shape Memory Alloy Cables." Applied Mechanics and Materials 668-669 (October 2014): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.193.

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In this paper, the super-elastic shape memory alloy (SMA) composite cables are used for vibration control of high-rise chemical towers during the free vibration. The displacement and velocity response to initial displacements were studied by the lumped mass method combined with Newmark integration method. It is found that super-elastic SMA cables can reduce the free vibration amplitudes and shorten the attenuation period of high-rise chemical towers effectively.

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Malarski, Ryszard. "A concept for the examination of reference points stability in horizontal control networks." Reports on Geodesy and Geoinformatics 101, no. 1 (June 1, 2016): 60–69. http://dx.doi.org/10.1515/rgg-2016-0022.

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Abstract This paper presents a concept for the identification of stable reference points used in horizontal control networks, which is based on the lengths of apparent displacement vectors and their mean errors. These vectors and their mean errors are obtained during the process of calculating displacements with free adjustment conditions. It will be shown that the influence of the apparent displacement vectors has a significant effect on the calculation of results. The identification of stable points, using the proposed method, is an integral part of the adjustment process and allows for the interrogation the influence of individual point inclusion or deletion from the reference database, on the values of displacements of controlled points. A detailed process of stable reference points identification is presented using the example of a linear-angular network for a barrage.

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Weber, Daniel M., Michelle Seiler, Ulrike Subotic, Markus Kalisch, and Robert Weil. "Buddy taping versus splint immobilization for paediatric finger fractures: a randomized controlled trial." Journal of Hand Surgery (European Volume) 44, no. 6 (January 31, 2019): 640–47. http://dx.doi.org/10.1177/1753193418822692.

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The purpose of this single-centre randomized controlled trial was to assess the non-inferiority of buddy taping versus splint immobilization of extra-articular paediatric finger fractures. Secondary fracture displacement was the primary outcome; patient comfort, cost and range of finger motion were secondary outcomes. Ninety-nine children were randomly assigned to taping or splinting. Sixty-nine fractures were undisplaced; 31 were displaced and required reduction before taping or splinting. Secondary displacement occurred in one patient in the taping and three in the splinting group. The risk difference was below the predefined non-inferiority level of 5%. All secondary displacements occurred in the 31 displaced fractures after reduction and were in little fingers. Patient comfort was significantly higher and cost lower in the taping group. We conclude from this study the non-inferiority of buddy taping versus splint immobilization of extra-articular paediatric finger fractures in general. We advise treatment may need to be individualized for patients with displaced fractures because we cannot make any absolute conclusions for these fractures. Level of evidence: I

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BUSQUETS, Enrique, and Monika IVANTYSYNOVA. "A Multi-Actuator Displacement-Controlled System with Pump Switching–." JFPS International Journal of Fluid Power System 8, no. 2 (2014): 66–75. http://dx.doi.org/10.5739/jfpsij.8.66.

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KAMI, Tsuyoshi, Hiroyuki YAMADA, and Nagahisa OGASAWARA. "Effect of Strain Rate on Displacement Controlled Milli-Indentation." Proceedings of the Materials and Mechanics Conference 2018 (2018): OS0201. http://dx.doi.org/10.1299/jsmemm.2018.os0201.

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Padmanabhan, S., T. Misteli, and D. L. DeVoe. "Controlled droplet discretization and manipulation using membrane displacement traps." Lab Chip 17, no. 21 (2017): 3717–24. http://dx.doi.org/10.1039/c7lc00910k.

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Lumantarna, E., N. Lam, and J. Wilson. "Displacement-Controlled Behavior of Asymmetrical Single-Story Building Models." Journal of Earthquake Engineering 17, no. 6 (March 7, 2013): 902–17. http://dx.doi.org/10.1080/13632469.2013.781557.

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Baumgardner, William J., Kevin Whitham, and Tobias Hanrath. "Confined-but-Connected Quantum Solids via Controlled Ligand Displacement." Nano Letters 13, no. 7 (June 27, 2013): 3225–31. http://dx.doi.org/10.1021/nl401298s.

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Chandrasekaran, Arun Richard, and Ken Halvorsen. "Controlled disassembly of a DNA tetrahedron using strand displacement." Nanoscale Advances 1, no. 3 (2019): 969–72. http://dx.doi.org/10.1039/c8na00340h.

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Holdsworth, D. W., D. W. Rickey, M. Drangova, D. J. M. Miller, and A. Fenster. "Computer-controlled positive displacement pump for physiological flow simulation." Medical & Biological Engineering & Computing 29, no. 6 (November 1991): 565–70. http://dx.doi.org/10.1007/bf02446086.

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Zahoor, Akram. "Evaluation of throughwall crack pipes under displacement controlled loading." Nuclear Engineering and Design 100, no. 1 (February 1987): 11–19. http://dx.doi.org/10.1016/0029-5493(87)90068-9.

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Iteney, Hugo, Thomas W. Cornelius, Olivier Thomas, and Jonathan Amodeo. "Load versus displacement-controlled nanocompression: Insights from atomistic simulations." Scripta Materialia 226 (March 2023): 115245. http://dx.doi.org/10.1016/j.scriptamat.2022.115245.

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