Log in

Relevant bibliographies by topics / Robustness with respect to uncertainties / Journal articles

To see the other types of publications on this topic, follow the link: Robustness with respect to uncertainties.

Journal articles on the topic 'Robustness with respect to uncertainties'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Robustness with respect to uncertainties.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hromčik, Martin, and Michael Šebek. "Fast Fourier Transform and Robustness Analysis with Respect to Parametric Uncertainties 1." IFAC Proceedings Volumes 33, no. 14 (2000): 723–25. http://dx.doi.org/10.1016/s1474-6670(17)36315-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Hoffmann, Anna, Alexander Scherrer, and Karl-Heinz Küfer. "Analyzing the quality robustness of chemotherapy plans with respect to model uncertainties." Mathematical Biosciences 259 (January 2015): 55–61. http://dx.doi.org/10.1016/j.mbs.2014.11.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Beck, Andre T., W. J. S. Gomes, and F. A. V. Bazan. "ON THE ROBUSTNESS OF STRUCTURAL RISK OPTIMIZATION WITH RESPECT TO EPISTEMIC UNCERTAINTIES." International Journal for Uncertainty Quantification 2, no. 1 (2012): 1–20. http://dx.doi.org/10.1615/int.j.uncertaintyquantification.v2.i1.20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Wolniak, Philipp, Jakob Cramer, and Roland Lachmayer. "ROBUST MULTI-OBJECTIVE OPTIMIZATION IN PRODUCT DEVELOPMENT WITH RESPECT TO USER-SCENARIO AND MANUFACTURING UNCERTAINTIES." Proceedings of the Design Society 1 (July 27, 2021): 2591–600. http://dx.doi.org/10.1017/pds.2021.520.

Full text

Abstract:

AbstractIn product development, user-scenarios are a way of tailoring requirements to defined customer groups. Furthermore, a product design often involves multiple conflicting objectives that are analyzed within an iterative process. The models typically used for the analysis often do not accurately reflect the real-world representation. This can be alleviated by finding robust product designs. While usually uncertainties due to manufacturing tolerances are investigated, we additionally consider uncertainties in the user-scenario. Therefore, we present a robustness evaluation in a multi-objec

APA, Harvard, Vancouver, ISO, and other styles

5

Chen, Yu Dong, and S. H. Chen. "Robustness Analysis of Responses of Structures with Uncertain Parameters." Advanced Materials Research 44-46 (June 2008): 303–10. http://dx.doi.org/10.4028/www.scientific.net/amr.44-46.303.

Full text

Abstract:

In the engineering structures, the design parameters may be uncertain because of the manufacture errors and inaccuracy in measurement, etc. The uncertainties of structural parameters may lead to large and unexpected excursion of responses that may lead to drastic reduction in accuracy and precision of the operations. Uncertainties in the design parameters are often considered to ensure that the structure is robust with respect to response errors. The paper discusses the robustness of responses of structures with uncertainties, which are described with three models, the random, convex, and inte

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Fan, Yi Xin Su, Hong Min, and Fei Long. "Sliding Mode Control of Servo System with Brushless DC Motor Based on Nominal Model." Applied Mechanics and Materials 391 (September 2013): 415–19. http://dx.doi.org/10.4028/www.scientific.net/amm.391.415.

Full text

Abstract:

For brushless DC motor with parameter uncertainties and load disturbances in the practical servo system such as numerical control machine (NCM), a novel sliding mode control algorithm is proposed. This control algorithm consists of two controllers. One is the sliding mode controller for practical plant to ensure robustness against parameter uncertainties and load disturbances, the other is the backstepping controller for nominal model to compensate the position error for practical servo system. The Lyapunov approach is used to prove the convergence of the controllers.At last, The simulation re

APA, Harvard, Vancouver, ISO, and other styles

7

Luo, Jianjun, Kai Jin, Mingming Wang, Jianping Yuan, and Gefei Li. "Robust entry guidance using linear covariance-based model predictive control." International Journal of Advanced Robotic Systems 14, no. 1 (2017): 172988141668750. http://dx.doi.org/10.1177/1729881416687503.

Full text

Abstract:

For atmospheric entry vehicles, guidance design can be accomplished by solving an optimal issue using optimal control theories. However, traditional design methods generally focus on the nominal performance and do not include considerations of the robustness in the design process. This paper proposes a linear covariance-based model predictive control method for robust entry guidance design. Firstly, linear covariance analysis is employed to directly incorporate the robustness into the guidance design. The closed-loop covariance with the feedback updated control command is initially formulated

APA, Harvard, Vancouver, ISO, and other styles

8

Zhao, Zhan Shan, Lian Kun Sun, and Jing Zhang. "Sliding Mode Control for a Class of Unmatched Uncertain Linear System." Advanced Materials Research 422 (December 2011): 846–49. http://dx.doi.org/10.4028/www.scientific.net/amr.422.846.

Full text

Abstract:

A novel method of designing nonlinear robust sliding mode controller is presented to a class of nonlinear unmatched uncertain systems based on integral sliding mode and self-tuning law. Firstly, the unmatched is will not be amplified by the discontinuous control. Then the controller based on integral sliding mode is constructed to ensure the robustness. The stability of proposed procedure is proven by using the Lyapunov theory and guarantees robustness against uncertainties. The upper bounds of uncertainties are not required to be known in advance. Finally, simulation studies demonstrate that

APA, Harvard, Vancouver, ISO, and other styles

9

Yin, Xiaomeng, Xing Wei, Lei Liu, and Yongji Wang. "Improved Hybrid Fireworks Algorithm-Based Parameter Optimization in High-Order Sliding Mode Control of Hypersonic Vehicles." Complexity 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/9098151.

Full text

Abstract:

With respect to the nonlinear hypersonic vehicle (HV) dynamics, achieving a satisfactory tracking control performance under uncertainties is always a challenge. The high-order sliding mode control (HOSMC) method with strong robustness has been applied to HVs. However, there are few methods for determining suitable HOSMC parameters for an efficacious control of HV, given that the uncertainties are randomly distributed. In this study, we introduce a hybrid fireworks algorithm- (FWA-) based parameter optimization into HV control design to satisfy the design requirements with high probability. Fir

APA, Harvard, Vancouver, ISO, and other styles

10

FEKI, MOEZ. "SYNCHRONIZATION OF CHAOTIC SYSTEMS WITH PARAMETRIC UNCERTAINTIES USING SLIDING OBSERVERS." International Journal of Bifurcation and Chaos 14, no. 07 (2004): 2467–75. http://dx.doi.org/10.1142/s021812740401076x.

Full text

Abstract:

This paper is concerned with synchronization of chaotic systems. We consider a drive-response type of synchronization via a scalar transmitted signal. Given some structural conditions of chaotic systems, a sliding observer-based response system is constructed to synchronize with the drive system within a finite time. Moreover, if the observer gain is judiciously chosen, robustness with respect to bounded parameter variations is guaranteed. To improve furthermore the performance of the response system, unknown parameters are adaptively estimated in conjunction with the sliding observer. To demo

APA, Harvard, Vancouver, ISO, and other styles

11

Ge, Dongming, Guanghui Sun, and Hamid Reza Karimi. "Robust Anti-Windup Control Considering Multiple Design Objectives." Mathematical Problems in Engineering 2012 (2012): 1–13. http://dx.doi.org/10.1155/2012/586279.

Full text

Abstract:

A new saturation control technique is proposed to design multiobjective and robust anti-windup controllers for linear systems with input saturations. Based on the characterization of saturation nonlinearities and modeling uncertainties via integral quadratic constraints (IQCs), this method considers a mixedH2/H∞performance indexes while maintaining dynamic constraints on the controller. The analysis and synthesis conditions are presented in terms of scaled linear matrix inequalities (LMIs). The proposed control algorithm can improve the performance of the input-constrained system while also gu

APA, Harvard, Vancouver, ISO, and other styles

12

Chen, Xiangjian, Di Li, Pingxin Wang, Xibei Yang, and Hongmei Li. "Model-Free Adaptive Sliding Mode Robust Control with Neural Network Estimator for the Multi-Degree-of-Freedom Robotic Exoskeleton." Complexity 2020 (March 17, 2020): 1–10. http://dx.doi.org/10.1155/2020/8327456.

Full text

Abstract:

A new model-free adaptive robust control method has been proposed for the robotic exoskeleton, and the proposed control scheme depends only on the input and output data, which is different from model-based control algorithms that require exact dynamic model knowledge of the robotic exoskeleton. The dependence of the control algorithm on the prior knowledge of the robotic exoskeleton dynamics model is reduced, and the influence of the system uncertainties are compensated by using the model-free adaptive sliding mode controller based on data-driven methodology and neural network estimator, which

APA, Harvard, Vancouver, ISO, and other styles

13

Elobaid, Youssif Mohamed Toum, Jain Huang, and Yongji Wang. "Nonlinear Disturbance Observer Based Robust Tracking Control of Pneumatic Muscle." Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/872093.

Full text

Abstract:

Presently pneumatic muscles (PMs) are used in various applications due to their simple construction, lightweight, and high force-to-weight ratio. However, pneumatic muscles are facing various problems due to their nonlinear characteristics and various uncertainties in real applications. To cope with the uncertainties and strong nonlinearity of a PM model, a nonlinear disturbance observer (NDO) is designed to estimate the lumped disturbance. Based on the disturbance observer, the tracking control of PM is studied. Stability analysis based on Lyapunov method with respect to our proposed control

APA, Harvard, Vancouver, ISO, and other styles

14

Zischg, Jonatan, Mariana L. R. Goncalves, Taneha Kuzniecow Bacchin, et al. "Info-Gap robustness pathway method for transitioning of urban drainage systems under deep uncertainties." Water Science and Technology 76, no. 5 (2017): 1272–81. http://dx.doi.org/10.2166/wst.2017.320.

Full text

Abstract:

In the urban water cycle, there are different ways of handling stormwater runoff. Traditional systems mainly rely on underground piped, sometimes named ‘gray’ infrastructure. New and so-called ‘green/blue’ ambitions aim for treating and conveying the runoff at the surface. Such concepts are mainly based on ground infiltration and temporal storage. In this work a methodology to create and compare different planning alternatives for stormwater handling on their pathways to a desired system state is presented. Investigations are made to assess the system performance and robustness when facing the

APA, Harvard, Vancouver, ISO, and other styles

15

Hoo, Choon Lih, and Sallehuddin Mohamed Haris. "A Brief Survey on Artificial Intelligence Methods in Synchronous Motor Control." Applied Mechanics and Materials 52-54 (March 2011): 198–203. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.198.

Full text

Abstract:

Many industrial applications require efficient servo drives and speed control to obtain the necessary performance with respect to different applications. As time passes, artificial intelligence has grown and replaced many traditional control methods in order to attain greater robustness to uncertainties, faster dynamic response and smaller position and speed errors. This paper briefly reviews several artificial intelligence implementations in synchronous motor control systems and briefly indicates the advantages and disadvantages of each method.

APA, Harvard, Vancouver, ISO, and other styles

16

Ng, K. C., H. T. Chua, and A. S. Ong. "Experimental verification of a diagnostic model for reciprocating chillers." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 211, no. 4 (1997): 259–65. http://dx.doi.org/10.1243/0954408971529728.

Full text

Abstract:

This paper investigates the robustness of a diagnostic model for the performance evaluation of reciprocating chillers. The model, which is described by three adjustable parameters of the chiller, is verified by experimental results with three purpose-built system configurations. It is found that the model is both flexible and accurate with respect to changes in the system layout and the predictions of chiller coefficients of performance (COP) are well within the experimental uncertainties.

APA, Harvard, Vancouver, ISO, and other styles

17

Babaei, A. R., M. Mortazavi, and M. B. Menhaj. "Robust and computational efficient autopilot design: A hybrid approach based on classic control and genetic-fuzzy sliding mode control." Aeronautical Journal 117, no. 1194 (2013): 839–59. http://dx.doi.org/10.1017/s0001924000008484.

Full text

Abstract:

Abstract The purpose of this paper is developing an efficient flight control strategy in terms of time response characteristics, robustness with respect to both parametric uncertainties and un-modeled nonlinear terms, number of required measurements, and computational burden. The proposed method is based on combination of a classic controller as principal section of the autopilot and a multi-objective genetic algorithm-based fuzzy output sliding mode control (FOSMC). FOSMC not only modifies robustness of the classic controller against uncertainties and external disturbances, but also modifies

APA, Harvard, Vancouver, ISO, and other styles

18

Choura, Slim, and Ahmet S. Yigit. "Control of Structural Vibrations by Confinement in the Presence of Parameter Uncertainties and Disturbances." Journal of Vibration and Control 8, no. 5 (2002): 575–93. http://dx.doi.org/10.1177/107754602023713.

Full text

Abstract:

A strategy for the simultaneous confinement and suppression of vibrations in flexible structures is proposed. The strategy accounts for parameter uncertainties and persistent disturbances. Certain design considerations are discussed and lead to the development of norm bounds for the control effort, displacement and velocity. These bounds if minimized with respect to the feedback parameters yield a better handle for controller design. Conditions for robustness are also developed using the control law. Furthermore, a special design of feedback for constant and periodic disturbance signals is int

APA, Harvard, Vancouver, ISO, and other styles

19

Guowei, Xu, Wan Zhenkai, and Li Chunqing. "Synchronization of Lorenz System Based on Fast Stabilization Sliding Mode Control." Mathematical Problems in Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/282919.

Full text

Abstract:

A sliding mode control approach is achieved for Lorenz system based on optimal finite time convergent and integral sliding mode surface. The system perturbation is divided into two parts: the unmatched and the matched parts. Firstly, we design a discontinuous control for the unmatched part which will not be amplified. Secondly, we design a continuous control, that is, the ideal control to stabilize the Lorenz system error states in finite time stabilization. Then the controller based on integral sliding mode is constructed to ensure the robustness. The proposed method is proven to guarantee th

APA, Harvard, Vancouver, ISO, and other styles

20

RAHMANI, Z., M. R. JAHED MOTLAGH, and WILLIAM DITTO. "ROBUST CONTROL OF SPATIOTEMPORAL CHAOS IN COUPLED MAP LATTICES." International Journal of Bifurcation and Chaos 19, no. 06 (2009): 2031–42. http://dx.doi.org/10.1142/s0218127409023883.

Full text

Abstract:

In this paper, a new method for controlling spatiotemporal chaos in discrete-time spatially extended systems modeled by coupled map lattices is proposed. This method is based on quasi-sliding mode using a Lyapunov function. This method enables the system to drive the chaotic motion toward any desired trajectory via a sliding surface in the error space. The controller also guarantees finite time convergence of the state trajectory. The main advantage of this method is its robustness with respect to additive uncertainties and its applicability for all types of coupled map lattices. A diffusively

APA, Harvard, Vancouver, ISO, and other styles

21

Knospe, C. R., R. W. Hope, S. M. Tamer, and S. J. Fedigan. "Robustness of Adaptive Unbalance Control of Rotors with Magnetic Bearings." Journal of Vibration and Control 2, no. 1 (1996): 33–52. http://dx.doi.org/10.1177/107754639600200103.

Full text

Abstract:

Rotor unbalance in the primary cause of unacceptable vibration in rotating machinery. Over the last decade, researchers have explored different methods of taking advantage of the active nature of magnetic bearings to attenuate unbalance response including both feedback and adaptive open loop methods. An important issue in the application of this technology to industrial machines is the robustness of the unbalance control algorithm. The stability and performance robustness of a promising adaptive open loop control algorithm is examined. Expressions are derived for a number of unstructured uncer

APA, Harvard, Vancouver, ISO, and other styles

22

Orlov, Y. V. "Sliding Mode Observer-Based Synthesis of State Derivative-Free Model Reference Adaptive Control of Distributed Parameter Systems." Journal of Dynamic Systems, Measurement, and Control 122, no. 4 (2000): 725–31. http://dx.doi.org/10.1115/1.1320447.

Full text

Abstract:

This paper presents control laws for distributed parameter systems of parabolic and hyperbolic types which, on the one hand ensure robustness with respect to small dynamic uncertainties and disturbances, and on the other hand, permit on-line plant parameter estimation. The novelty of the algorithms proposed is (a) in the construction of a sliding mode-based state derivative observer and (b) in the inclusion of this observer into a model reference adaptive controller which thereby regularizes the ill-posed identification problem itself. Apart from this, the controllers constructed do not suffer

APA, Harvard, Vancouver, ISO, and other styles

23

Hopfgartner, Johannes, Markus Stock, Barbara Knäusl, and Dietmar Georg. "Robustness of IMPT treatment plans with respect to inter-fractional set-up uncertainties: Impact of various beam arrangements for cranial targets." Acta Oncologica 52, no. 3 (2012): 570–79. http://dx.doi.org/10.3109/0284186x.2012.744874.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Wang, Pengfei, Jie Wang, Jianming Shi, Chang Luo, Shili Tan, and Qiyun Xu. "Adaptive Neural Back-Stepping Control with Constrains for a Flexible Air-Breathing Hypersonic Vehicle." Mathematical Problems in Engineering 2015 (2015): 1–14. http://dx.doi.org/10.1155/2015/374838.

Full text

Abstract:

The design of an adaptive neural back-stepping control for a flexible air-breathing hypersonic vehicle (AHV) in the presence of input constraint and aerodynamic uncertainty is discussed. Based on functional decomposition, the dynamics can be decomposed into the velocity subsystem and the altitude subsystem. To guarantee the exploited controller’s robustness with respect to parametric uncertainties, neural network (NN) is applied to approximate the lumped uncertainty of each subsystem of AHV model. The exceptional contribution is that novel auxiliary systems are introduced to compensate both th

APA, Harvard, Vancouver, ISO, and other styles

25

Jafari, Saeid, Petros Ioannou, and Lael Rudd. "Adaptive feedback suppression of unknown periodic components of acoustic noises with time-varying characteristics." Journal of Vibration and Control 23, no. 4 (2016): 526–38. http://dx.doi.org/10.1177/1077546315581249.

Full text

Abstract:

Effective attenuation of the noise level is an important problem in acoustic systems. In this paper, we propose a robust adaptive output feedback control scheme that can considerably attenuate narrow-band noises made up of periodic signals mixed with random noise in the presence of modeling uncertainties. The amplitude, phase and frequencies as well as the number of periodic terms are unknown and could vary with time. The performance and robustness of the proposed scheme with respect to unstructured modeling uncertainties are analyzed for continuous-time single-input, single-output systems; th

APA, Harvard, Vancouver, ISO, and other styles

26

Ferguene, Farid, and Redouane Toumi. "Dynamic External Force Feedback Loop Control of a Robot Manipulator Using a Neural Compensator—Application to the Trajectory Following in an Unknown Environment." International Journal of Applied Mathematics and Computer Science 19, no. 1 (2009): 113–26. http://dx.doi.org/10.2478/v10006-009-0011-9.

Full text

Abstract:

Dynamic External Force Feedback Loop Control of a Robot Manipulator Using a Neural Compensator—Application to the Trajectory Following in an Unknown EnvironmentForce/position control strategies provide an effective framework to deal with tasks involving interaction with the environment. One of these strategies proposed in the literature is external force feedback loop control. It fully employs the available sensor measurements by operating the control action in a full dimensional space without using selection matrices. The performance of this control strategy is affected by uncertainties in bo

APA, Harvard, Vancouver, ISO, and other styles

27

Aouani, Nedia, and Carlos Olalla. "Robust LQR Control for PWM Converters with Parameter-Dependent Lyapunov Functions." Applied Sciences 10, no. 21 (2020): 7534. http://dx.doi.org/10.3390/app10217534.

Full text

Abstract:

This paper presents a novel framework for robust linear quadratic regulator (LQR)-based control of pulse-width modulated (PWM) converters. The converter is modeled as a linear parameter-varying (LPV) system and the uncertainties, besides their rate of change, are taken into account. The proposed control synthesis method exploits the potential of linear matrix inequalities (LMIs), assuring robust stability whilst obtaining non-conservative results. The method has been validated in a PWM DC–DC boost converter, such that it has been shown, with the aid of simulations, that improved robustness and

APA, Harvard, Vancouver, ISO, and other styles

28

Weeraratne, J. R., Lloyd Logan, and T. E. Unny. "Performance evaluation of alternate policies on reservoir system operation." Canadian Journal of Civil Engineering 13, no. 2 (1986): 203–12. http://dx.doi.org/10.1139/l86-028.

Full text

Abstract:

This paper discusses within the context of the Grand River system operation the application of the three performance criteria introduced earlier by T. Hashimoto, D. P. Loucks, and J. R. Stedinger. These criteria evaluate the performance characteristic in respect to system failure, system recovery, and system vulnerability with regard to extreme (costly) failures for alternative operational policies. System robustness, also discussed by Hashimoto and co-workers, is used to measure the economic flexibility of system operation to adapt to uncertainties of future demand. The primary objective of t

APA, Harvard, Vancouver, ISO, and other styles

29

Moellenhoff, D. E., S. Vittal Rao, and C. A. Skarvan. "Design of Robust Controllers for Gas Turbine Engines." Journal of Engineering for Gas Turbines and Power 113, no. 2 (1991): 283–89. http://dx.doi.org/10.1115/1.2906560.

Full text

Abstract:

This paper describes robust controller design methodologies for gas turbine engines. A linear state variable model for the engine is derived using partial derivatives. The Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR) and the Parameter Robust Linear Quadratic Gaussian (PRLQG) robust controller design methodologies have been used to design a controller for gas turbine engines. A new method is proposed by combining the features of LQG/LTR and PRLQG methods and yields good robustness properties with respect to both unstructured uncertainties in the frequency domain and structure

APA, Harvard, Vancouver, ISO, and other styles

30

Acosta Lúa, Cuauhtémoc, Bernardino Castillo Toledo, Stefano Di Gennaro, and Marcela Martinez-Gardea. "Dynamic Control Applied to a Laboratory Antilock Braking System." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/896859.

Full text

Abstract:

The control of an antilock braking system is a difficult problem due to the existence of nonlinear dynamics and uncertainties of its characteristics. To overcome these issues, in this work, a dynamic nonlinear controller is proposed, based on a nonlinear observer. To evaluate its performance, this controller has been implemented on an ABS Laboratory setup, representing a quarter car model. The nonlinear observer reconstructs some of the state variables of the setup, assumed not measurable, to establish a fair benchmark for an ABS system of a real automobile. The dynamic controller ensures expo

APA, Harvard, Vancouver, ISO, and other styles

31

Jin, Zhongjia, Sheng Liu, Lincheng Jin, Wei Chen, and Weilin Yang. "Model Based Robust Predictive Control of Ship Roll/Yaw Motions with Input Constraints." Applied Sciences 10, no. 10 (2020): 3377. http://dx.doi.org/10.3390/app10103377.

Full text

Abstract:

A robust H∞-type state feedback model predictive control (H∞-SFMPC) with input constraints is proposed to optimize the control performance during the ship sailing. Specifically, the approach employed in this paper is able to optimize the closed-loop performance with respect to an H∞-type cost function which predicts the system performance based on the actual model instead of the ideal model. As a result, the effect caused by disturbances is attenuated. The state feedback control gain for the control input of the rudder-fin joint roll/yaw control system is obtained by solving a constrained conv

APA, Harvard, Vancouver, ISO, and other styles

32

Liu, Lifeng, Huisheng Gao, Yuwei Wang, and Wei Sun. "Robust Optimization Model for Photovoltaic Power Producer’s Bidding Decision-Making in Electricity Market." Mathematical Problems in Engineering 2020 (May 30, 2020): 1–8. http://dx.doi.org/10.1155/2020/6109648.

Full text

Abstract:

With the deepening of electricity market (EM) reform and the high penetration of photovoltaic (PV) energy in power system, the uncertainties of a PV power output and fluctuation of EM prices would bring substantial financial risks for PV power producers (PPPs). This paper proposed a robust optimization model for PPP’s power bidding decision-making. Specifically, the random PV power outputs are modeled by the uncertainty set, which need no probabilistic information and can fully depict the continuous range of uncertainties. Subsequently, with respect to any scenario for day-ahead EM prices, PPP

APA, Harvard, Vancouver, ISO, and other styles

33

Aires, F., C. Prigent, and W. B. Rossow. "Neural Network Uncertainty Assessment Using Bayesian Statistics: A Remote Sensing Application." Neural Computation 16, no. 11 (2004): 2415–58. http://dx.doi.org/10.1162/0899766041941925.

Full text

Abstract:

Neural network (NN) techniques have proved successful for many regression problems, in particular for remote sensing; however, uncertainty estimates are rarely provided. In this article, a Bayesian technique to evaluate uncertainties of the NN parameters (i.e., synaptic weights) is first presented. In contrast to more traditional approaches based on point estimation of the NN weights, we assess uncertainties on such estimates to monitor the robustness of the NN model. These theoretical developments are illustrated by applying them to the problem of retrieving surface skin temperature, microwav

APA, Harvard, Vancouver, ISO, and other styles

34

Zhang, Menghua. "Finite-time model-free trajectory tracking control for overhead cranes subject to model uncertainties, parameter variations and external disturbances." Transactions of the Institute of Measurement and Control 41, no. 12 (2019): 3516–25. http://dx.doi.org/10.1177/0142331219830157.

Full text

Abstract:

The payload mass and the cable length are always different/uncertain for various transportation tasks and external disturbances that accompany industrial overhead crane systems. In addition, existing control methods can obtain merely asymptotic results. To solve the aforementioned problems, an accurate model-free trajectory tracking controller subject to finite time convergence for overhead crane systems is proposed based on the suitably defined non-singular terminal sliding vector. Moreover, the proposed controller is absolutely continuous, addressing the limitations and shortcomings of the t

APA, Harvard, Vancouver, ISO, and other styles

35

Latosiński, Paweł, and Andrzej Bartoszewicz. "Zero-Width Quasi-Sliding Mode Band in the Presence of Non-Matched Uncertainties." Energies 14, no. 11 (2021): 3011. http://dx.doi.org/10.3390/en14113011.

Full text

Abstract:

Sliding mode control strategies are well known for ensuring robustness of the system with respect to disturbance and model uncertainties. For continuous-time plants, they achieve this property by confining the system state to a particular hyperplane in the state space. Contrary to this, discrete-time sliding mode control (DSMC) strategies only drive the system representative point to a certain vicinity of that hyperplane. In established literature on DSMC, the width of this vicinity has always been strictly greater than zero in the presence of uncertainties. Thus, ideal sliding motion was cons

APA, Harvard, Vancouver, ISO, and other styles

36

Gholami, Milad, Alessandro Pilloni, Alessandro Pisano, and Elio Usai. "Robust Distributed Secondary Voltage Restoration Control of AC Microgrids under Multiple Communication Delays." Energies 14, no. 4 (2021): 1165. http://dx.doi.org/10.3390/en14041165.

Full text

Abstract:

This paper focuses on the robust distributed secondary voltage restoration control of AC microgrids (MGs) under multiple communication delays and nonlinear model uncertainties. The problem is addressed in a multi-agent fashion where the generators’ local controllers play the role of cooperative agents communicating over a network and where electrical couplings among generators are interpreted as disturbances to be rejected. Communications are considered to be affected by heterogeneous network-induced time-varying delays with given upper-bounds and the MG is subjected to nonlinear model uncerta

APA, Harvard, Vancouver, ISO, and other styles

37

Zhou, Wenya, Kuilong Yin, Rui Wang, and Yue-E. Wang. "Design of Attitude Control System for UAV Based on Feedback Linearization and Adaptive Control." Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/492680.

Full text

Abstract:

Attitude dynamic model of unmanned aerial vehicles (UAVs) is multi-input multioutput (MIMO), strong coupling, and nonlinear. Model uncertainties and external gust disturbances should be considered during designing the attitude control system for UAVs. In this paper, feedback linearization and model reference adaptive control (MRAC) are integrated to design the attitude control system for a fixed wing UAV. First of all, the complicated attitude dynamic model is decoupled into three single-input single-output (SISO) channels by input-output feedback linearization. Secondly, the reference models

APA, Harvard, Vancouver, ISO, and other styles

38

Lu, Wei, Yun Hai Geng, and Xiao Wei Shan. "Robust Optimal Sliding Mode Control for Attitude Synchronization of Autonomous Docking to a Tumbling Target." Applied Mechanics and Materials 157-158 (February 2012): 757–61. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.757.

Full text

Abstract:

This paper investigates the control problem of attitude synchronization for an on-orbit servicing spacecraft autonomously docking to a freely tumbling target in space. An optimal sliding surface is designed based on optimal control theory, followed by a robust optimal sliding mode control law designed for attitude synchronization in accordance. Meanwhile, the unknown but bounded external disturbances, parameter variations, model uncertainties, and measurement errors are all considered during the control algorithm design. The salient feature of this control law is that the relative attitude var

APA, Harvard, Vancouver, ISO, and other styles

39

OR, A. C., L. CORTELEZZI, and J. L. SPEYER. "Robust feedback control of Rayleigh–Bénard convection." Journal of Fluid Mechanics 437 (June 22, 2001): 175–202. http://dx.doi.org/10.1017/s0022112001004256.

Full text

Abstract:

We investigate the application of linear-quadratic-Gaussian (LQG) feedback control, or, in modern terms, [Hscr ]2 control, to the stabilization of the no-motion state against the onset of Rayleigh–Bénard convection in an infinite layer of Boussinesq fluid. We use two sensing and actuating methods: the planar sensor model (Tang & Bau 1993, 1994), and the shadowgraph model (Howle 1997a). By extending the planar sensor model to the multi-sensor case, it is shown that a LQG controller is capable of stabilizing the no-motion state up to 14.5 times the critical Rayleigh number. We characterize t

APA, Harvard, Vancouver, ISO, and other styles

40

Rodríguez-Mata, A. E., G. Flores, A. H. Martínez-Vásquez, Z. D. Mora-Felix, R. Castro-Linares, and L. E. Amabilis-Sosa. "Discontinuous High-Gain Observer in a Robust Control UAV Quadrotor: Real-Time Application for Watershed Monitoring." Mathematical Problems in Engineering 2018 (November 27, 2018): 1–10. http://dx.doi.org/10.1155/2018/4940360.

Full text

Abstract:

A control algorithm that is robust with respect to wind disturbances for a quadrotor UAV attitude dynamics is presented. The proposed approach consists of a high-gain observer based on a discontinuous technique. Such an algorithm is embedded on board the quadrotor. The high-gain observer estimates external disturbances such as wind and parameter uncertainties, and a control algorithm is designed to compensate these undesired effects. The observer design is based on Lyapunov stability theory; simulation results and experiments validate the nonlinear observer performance and robustness of the ap

APA, Harvard, Vancouver, ISO, and other styles

41

Mens, M. J. P., and F. Klijn. "The added value of system robustness analysis for flood risk management illustrated by a case on the IJssel River." Natural Hazards and Earth System Sciences 15, no. 2 (2015): 213–23. http://dx.doi.org/10.5194/nhess-15-213-2015.

Full text

Abstract:

Abstract. Decision makers in fluvial flood risk management increasingly acknowledge that they have to prepare for extreme events. Flood risk is the most common basis on which to compare flood risk-reducing strategies. To take uncertainties into account the criteria of robustness and flexibility are advocated as well. This paper discusses the added value of robustness as an additional decision criterion compared to single-value flood risk only. We do so by quantifying flood risk and system robustness for alternative system configurations of the IJssel River valley in the Netherlands. We found t

APA, Harvard, Vancouver, ISO, and other styles

42

Mens, M. J. P., and F. Klijn. "The added value of system robustness analysis for flood risk management." Natural Hazards and Earth System Sciences Discussions 2, no. 4 (2014): 2913–45. http://dx.doi.org/10.5194/nhessd-2-2913-2014.

Full text

Abstract:

Abstract. Decision makers in fluvial flood risk management increasingly acknowledge that they have to prepare for extreme events. Flood risk is the most common basis on which to compare flood risk-reducing strategies. To take uncertainties into account the criteria of robustness and flexibility are advocated as well. This paper discusses the added value of robustness as additional decision criterion compared to single-value flood risk only. We do so by quantifying flood risk and system robustness for alternative system configurations of the Ijssel River valley in the Netherlands. We found that

APA, Harvard, Vancouver, ISO, and other styles

43

Dieulot, J. Y., A. El Kamel, and P. Borne. "Study of the stability of fuzzy controllers by an estimation of the attraction regions: A Vector Norm approach." Mathematical Problems in Engineering 8, no. 3 (2002): 221–31. http://dx.doi.org/10.1080/10241230215288.

Full text

Abstract:

A fuzzy controller with singleton defuzzification can be considered as the association of a regionwise constant term and of a regionwise non linear term, the latter being bounded by a linear controller. Based on the regionwise structure of fuzzy controller, the state space is partitioned into a series of disjoint sets. The fuzzy controller parameters are tuned in order to ensure that theith set is included into the domain of attraction of the preceding sets of the series. If the first set of the series is included into the region of attraction of the equilibrium point, the overall fuzzy contro

APA, Harvard, Vancouver, ISO, and other styles

44

Vesnaver, Aldo. "Instantaneous frequency and phase without unwrapping." GEOPHYSICS 82, no. 1 (2017): F1—F7. http://dx.doi.org/10.1190/geo2016-0185.1.

Full text

Abstract:

The instantaneous phase of a complex trace is normally computed as an inverse tangent function of the ratio between its imaginary and real parts. This algorithm often produces a discontinuous function in the range [[Formula: see text], [Formula: see text]], as the principal value of the inverse tangent is assumed. The attempt of removing these discontinuities, called phase unwrapping, introduces uncertainties and some personal bias because it requires user-defined parameters. A new algorithm that does not require any of these parameters is presented with the related software code and some appl

APA, Harvard, Vancouver, ISO, and other styles

45

Xiang, Zhengrong. "Robust Control of Particle Size Distribution in Aerosol Processes." International Journal of Computers Communications & Control 5, no. 3 (2010): 385. http://dx.doi.org/10.15837/ijccc.2010.3.2490.

Full text

Abstract:

This paper deals with a comprehensive study on robust control of particle size distribution of fractal agglomerate in aerosol processes with simultaneous chemical reaction, nucleation, condensation and coagulation. Firstly, a general aerosol process is described by population balance and mass and energy balances, which describes the evolution of particle size distribution, continuous phase species and temperature of the aerosol system, respectively. A lognormal moment approximations of the population balance model is then presented. Then, the robust state feedback controller is designed for th

APA, Harvard, Vancouver, ISO, and other styles

46

Zhao, Cheng, Lesheng Chen, and Dayue Chen. "Semi-Active Static Output Feedback Variable Structure Control for Two-Stage Vibration Isolation System." Journal of Vibration and Acoustics 128, no. 5 (2006): 627–34. http://dx.doi.org/10.1115/1.2203310.

Full text

Abstract:

A semi-active static output feedback variable structure control (VSC) strategy is presented to control a two-stage vibration isolation system in this paper. A continuous output feedback VSC controller which utilizes the measurements from a limited number of sensors installed at strategic locations is designed and a bypass electrorheological (ER) damper is applied to achieve the best control effect more rapidly and accurately. The determination of sliding surface in terms of the Routh-Hurwitz stability criterion is combined with continuous controller design such that the control law is complete

APA, Harvard, Vancouver, ISO, and other styles

47

Lajili, Ramzi, Olivier Bareille, Mohamed Lamjed Bouazizi, Mohamed Ichchou, and Noureddine Bouhaddi. "Composite beam identification using a variant of the inhomogeneous wave correlation method in presence of uncertainties." Engineering Computations 35, no. 6 (2018): 2126–64. http://dx.doi.org/10.1108/ec-03-2017-0072.

Full text

Abstract:

Purpose This paper aims to propose numerical-based and experiment-based identification processes, accounting for uncertainties to identify structural parameters, in a wave propagation framework. Design/methodology/approach A variant of the inhomogeneous wave correlation (IWC) method is proposed. It consists on identifying the propagation parameters, such as the wavenumber and the wave attenuation, from the frequency response functions. The latters can be computed numerically or experimentally. The identification process is thus called numerical-based or experiment-based, respectively. The prop

APA, Harvard, Vancouver, ISO, and other styles

48

Hammoum, Hocine, Amar Aliche, Karima Bouzelha, Younes Aoues, Ouali Amiri, and Youcef Mehani. "Fragility analysis of concrete elevated water tanks under seismic loads." Frattura ed Integrità Strutturale 15, no. 57 (2021): 93–113. http://dx.doi.org/10.3221/igf-esis.57.09.

Full text

Abstract:

The design of concrete elevated water tanks involves several kinds of uncertainties. Traditionally, the design of these structures is based on a deterministic analysis. Partial safety factors prescribed in design codes are applied to take into account these uncertainties and to ensure sufficiently safe design. However, this approach does not allow rational evaluation of the risk related to the structural failure and consequently its reliability. In fact, the partial safety factors can lead to over-designed structures; or to under designed structural components leading to a lack of structural r

APA, Harvard, Vancouver, ISO, and other styles

49

Boughari, Yamina, Ruxandra Mihaela Botez, Georges Ghazi, and Florian Theel. "Flight control clearance of the Cessna Citation X using evolutionary algorithms." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 231, no. 3 (2016): 510–32. http://dx.doi.org/10.1177/0954410016640821.

Full text

Abstract:

In this paper, an Aircraft Research Flight Simulator equipped with Flight Dynamics Level D (highest level) was used to collect flight test data and develop new controller methodologies. The changes in the aircraft’s mass and center of gravity position are affected by the fuel burn, leading to uncertainties in the aircraft dynamics. A robust controller was designed and optimized using the H∞ method and two different metaheuristic algorithms; in order to ensure acceptable flying qualities within the specified flight envelope despite the presence of uncertainties. The H∞ weighting functions were

APA, Harvard, Vancouver, ISO, and other styles

50

Hedjar, R., and P. Boucher. "Nonlinear Receding-Horizon Control of Rigid Link Robot Manipulators." International Journal of Advanced Robotic Systems 2, no. 1 (2005): 3. http://dx.doi.org/10.5772/5806.

Full text

Abstract:

The approximate nonlinear receding-horizon control law is used to treat the trajectory tracking control problem of rigid link robot manipulators. The derived nonlinear predictive law uses a quadratic performance index of the predicted tracking error and the predicted control effort. A key feature of this control law is that, for their implementation, there is no need to perform an online optimization, and asymptotic tracking of smooth reference trajectories is guaranteed. It is shown that this controller achieves the positions tracking objectives via link position measurements. The stability c

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!