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Nonlinear Output Feedback for HL-20 Flight Control Using Back-Stepping observer

JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS 2020年第3-4期100卷 1401-1416页

作者： Hosseini, Iman Mirzaei, Mojtaba Asemani, Mohammad Hassan Shiraz Univ Sch Power & Control Engn Dept Shiraz Iran Shiraz Univ Hydroaeronaut Res Ctr Shiraz Iran

This paper investigates the problem of an observer-based controller for the flight control of the HL-20 flight vehicle in the low altitude flight stage. The difficulty arises when the coupling of the control channels effects on each other. Moreover, due to limitations of rate gyroscope drift, free gyroscopes with high-precision Euler angles are considered. Consequently, for a control purpose, output feedback is used and by considering the coupling effects as disturbance, an observer is designed using the back-stepping method to estimate angular rates. These estimations are used in the controller design and with the Lyapunov function and trajectory initialization, globally uniformly bounded is achieved for the observer-based controlled system. The validity and effectiveness of the designed controller for the flight controller are shown by simulation results.

关键词： Output feedback Back-stepping observer observer-based controller Free gyroscopes Trajectory initialization HL-20 flight vehicle

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observer-based l2-l∞ control of 2D Roesser systems with random packet dropout

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IET CONTROL THEORY AND APPLICATIONS 2020年第5期14卷 774-780页

作者： Hien, Le Van Lan-Huong, Nguyen Thi Hanoi Natl Univ Educ Dept Math Hanoi Vietnam

This study is concerned with the problem of observer-based l(2)-l(infinity) control of two-dimensional (2D) discrete-time Roesser systems with exogenous disturbances. The control channel is subject to random packet dropouts and the closed-loop dynamics is presented as a 2D system with stochastic multiplicative noises in the system state and output vectors. based on a Lyapunov-like scheme, tractable conditions in terms of linear matrix inequalities (LMIs) are derived to ensure that the closed-loop system is l(2)-l(infinity) stable with a prescribed attenuation level. On the basis of the derived stability conditions, the design parameters of an observer-based controller are obtained through an LMI setting. A numerical example with simulations is given to illustrate the effectiveness of the design method.

关键词： state feedback stability linear matrix inequalities linear systems observers Lyapunov methods closed loop systems control system synthesis discrete time systems $l infinity control 2D Roesser systems random packet dropout two-dimensional discrete-time Roesser systems observer-based controller exogenous disturbances stochastic multiplicative noises system state output vector Lyapunov-like scheme tractable conditions linear matrix inequalities LMI closed-loop system attenuation level stability conditions design parameters

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Separation principle for quasi-one-sided Lipschitz nonlinear systems with time delay

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INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL 2020年第6期30卷 2430-2442页

作者： Hu, Guang-Da Dong, Wenqiang Cong, Yuhao Shanghai Univ Dept Math Shanghai 200444 Peoples R China Shanghai Customs Coll Shanghai Peoples R China

In this article, we address the problem of output stabilization for a class of nonlinear time-delay systems. First, an observer is designed for estimating the state of nonlinear time-delay systems by means of quasi-one-sided Lipschitz condition, which is less conservative than the one-sided Lipschitz condition. Then, a state feedback controller is designed to stabilize the nonlinear systems in terms of weak quasi-one-sided Lipschitz condition. Furthermore, it is shown that the separation principle holds for stabilization of the systems based on the observer-based controller. Under the quasi-one-sided Lipschitz condition, state observer and feedback controller can be designed separately even though the parameter (A,C) of nonlinear time-delay systems is not detectable and parameter (A,B) is not stabilizable. Finally, a numerical example is provided to verify the efficiency of the main results.

关键词： nonlinear time-delay systems observer-based controller quasi-one-sided Lipschitz condition separation principle

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Self-Triggered and Event-Triggered Control for Linear Systems With Quantization

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IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS 2020年第9期50卷 3136-3144页

作者： Zhou, Tianwei Zuo, Zhiqiang Wang, Yijing Tianjin Univ Tianjin Key Lab Proc Measurement & Control Sch Elect & Informat Engn Tianjin 300072 Peoples R China

This paper considers the observer-based event-triggered output control problem with quantization. Both plant-to-controller (measured output) channel and controller-to-plant (control input) channel have their own dynamic uniform quantizers and samplings. Therefore, the whole system has four asynchronous clocks, two quantizer updating clocks, and two sampling updating clocks. The main contribution of this paper is the proposed self-triggered and event-triggered control method based on these four clocks. The whole system is stabilized by two steps, i.e., system and controller synchronization, and controller stabilization. In the synchronization process, novel event-triggered and self-triggered samplings are proposed in terms of dynamic quantizer parameters. While in the stabilization process, event-triggered sampling is designed based on controller states and quantizer parameters. Moreover, it is proved that the Zeno behavior would not occur. The practicality and efficiency of the proposed method are illustrated by a numerical example borrowed from recent literature.

关键词： Quantization (signal) Synchronization Clocks Process control Output feedback Asymptotic stability Dynamic quantization observer-based controller self-triggered and event-triggered sampling synchronization

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Separation principle of quasi-one-sided Lipschitz non-linear systems

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IET CONTROL THEORY AND APPLICATIONS 2020年第16期14卷 2233-2241页

作者： Zhao, Yanbin Hu, Guang-Da Harbin Normal Univ Dept Math Harbin 150080 Peoples R China Shanghai Univ Dept Math Shanghai 200444 Peoples R China

In this study, the stabilisation of quasi-one-sided Lipschitz non-linear systems is investigated. For the quasi-one-sided Lipschitz non-linear system, a condition for the existence of the observer is presented. For the weak quasi-one-sided Lipschitz non-linear system, a state feedback controller is proposed and a condition is derived for the existence of the state feedback controller. The separation principle is obtained for the observer-based controller of the quasi-one-sided Lipschitz non-linear systems. The main results in this study extend and improve those in the literature. Numerical examples are given to illustrate the main results.

关键词： state feedback observers nonlinear control systems linear matrix inequalities stability separation principle state feedback controller quasione-sided Lipschitz nonlinear systems stabilisation observer-based controller

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observer-based finite-time bounded analysis for switched inertial recurrent neural networks under the PDT switching law

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PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 2020年 538卷 122699-122699页

作者： Huang, Zhengguo Xia, Jianwei Wang, Jing Wang, Jian Shen, Hao Anhui Univ Technol Sch Elect & Informat Engn Maanshan 243002 Peoples R China Linyi Univ Sch Automat & Elect Engn Linyi 276005 Shandong Peoples R China Liaocheng Univ Sch Math Sci Liaocheng 252059 Shandong Peoples R China

In this note, the observer-based finite-time boundedness analysis issue for the switched inertial recurrent neural networks (SIRNNs) is investigated deeply. The switching law, persistent dwell-time, with more generality and universality is employed. The first target is to develop a switched estimation system (SES) to obtain the states from the output of the researched open-loop SIRNNs. Thereafter, based on the before-mentioned SES, the resulting switched estimation error system (SEES) without the extrinsic disturbance, along with the closed-loop SIRNNs under state feedback controller are constructed. Furthermore, the sufficient conditions that the exponential stability for the SEES and the finite-time boundedness for the closed-loop SIRNNs are established simultaneously. The relevant estimator and controller gains are deduced by a straightforward decoupling manner. Ultimately, the feasibility of the method proposed is clarified and illustrated via a numerical example. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Finite-time boundedness Switched inertial recurrent neural networks Persistent dwell-time observer-based controller

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observer-based H∞ control of two-dimensional delayed networks under the random access protocol

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NEUROCOMPUTING 2020年 401卷 353-363页

作者： Li, Dehao Liang, Jinling Wang, Fan Ren, Xinwei Southeast Univ Sch Math Nanjing 210096 Peoples R China Southeast Univ Sch Automat Nanjing 210096 Peoples R China Southeast Univ Sch Cyber Sci & Engn Nanjing 210096 Peoples R China

In this paper, the H-infinity control problem is investigated for a time-delayed two-dimensional (2-D) network under the random access protocol (RAP). The control input is transmitted to the actuator via a network with communication constraint, where only one signal obtains the network access at each transmission instant, and the RAP is adopted here to schedule the data transmission which is depicted by an independent and identically distributed sequence. The randomly occurring uncertainty, nonlinearity and unknown time delays are all introduced in the underlying 2-D system. The aim of the addressed problem is to design an observer-based controller so that the considered 2-D system has a predefined H-infinity performance index. Sufficient condition is given to ensure the H-infinity performance of the closed-loop system via the Lyapunov theory and stochastic analysis. Moreover, the observer-based controller is dexterously designed to ensure the achievement of the H-infinity performance, under which the controller gains are designed by solving certain matrix inequalities. Finally, a numerical example is given to demonstrate effectiveness of the proposed approach. (C) 2020 Elsevier B.V. All rights reserved.

关键词： Two-dimensional systems random access protocol H-infinity control observer-based controller randomly occurring uncertainties

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Active Suspension System Control With Decentralized Event-Triggered Scheme

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2020年第12期67卷 10798-10808页

作者： Zhang, Hao Zheng, Xiaoyuan Li, Hongyi Wang, Zhuping Yan, Huaicheng Tongji Univ Shanghai Inst Intelligent Sci & Technol Shanghai 200092 Peoples R China Tongji Univ Dept Control Sci & Engn Shanghai 200092 Peoples R China Guangdong Univ Technol Sch Automat Guangzhou 510006 Peoples R China Guangdong Univ Technol Guangdong Prov Key Lab Intelligent Decis & Cooper Guangzhou 510006 Peoples R China East China Univ Sci & Technol Sch Informat Sci & Engn Shanghai 200237 Peoples R China Hubei Normal Univ Coll Mechatron & Control Engn Huangshi 435002 Hubei Peoples R China

This article concerns the problem of improving ride comfort of a full-vehicle active suspension system through an observer-based decentralized event-triggered H-infinity controller. The observer-based controller is adopted to cope with the situation that states information of vehicles are not available. To reduce the observer-based controller computing frequency, a decentralized event-triggered data transmission scheme is provided, and lower bounds on the minimum interevent time are guaranteed. based on the proposed controller, the H-infinity performance of an active full-vehicle suspension system can be obtained. Finally, simulations in the bump and random road conditions are shown to demonstrate the effectiveness of the derived algorithm.

关键词： Suspensions (mechanical systems) Control systems Roads Tires Data communication Safety observers Decentralized event-triggered mechanism (DETM) full-vehicle active suspension system minimum interevent time observer-based controller

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Piezoelectric Actuators with Uncertainty: observer-based Hysteresis Compensation and Joint Stability Analysis

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IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 2020年第5期28卷 1997-2004页

作者： Alem, S. Fakhreddin Izadi, Iman Sheikholeslam, Farid Ekramian, Mohsen Isfahan Univ Technol Dept Elect & Comp Engn Esfahan *** Iran Univ Isfahan Dept Elect Engn Esfahan *** Iran

This brief considers sliding mode control of hysteresis in piezoelectric actuators. For modeling of hysteresis, the Bouc-Wen model that is based on differential equations is utilized. One of the states of this model is unmeasurable. Therefore, a state observer is proposed, and the proper selection of observer parameters is discussed. based on the observed state, a control rule is proposed, and asymptotic stability of the observer-based closed-loop system is proven using the Lyapunov theory. This brief also presents a design method, i.e., sufficient conditions on design parameters for closed-loop stability are derived explicitly. Furthermore, the mass, stiffness, and damping coefficients in the model are assumed unknown. The values of these parameters are estimated using an online adaptation rule, and the control rule is modified based on the estimated parameters. The adaptation rule is extracted so that the asymptotic stability of the whole system is guaranteed. Simulation and experimental results are presented to demonstrate the effectiveness of the proposed scenarios.

关键词： Hysteresis observers Mathematical model Adaptation models Stability analysis Numerical models Actuators Hysteresis joint stability observer-based controller online parameter estimator parameter uncertainty piezoelectric actuators (PEAs)

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observer-based Sliding Mode Control for MEMS-based AC Voltage Reference Source 28

Observer-Based Sliding Mode Control for MEMS-based AC Voltag...

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28th Iranian Conference on Electrical Engineering (ICEE)

作者： Moghadam, Abolfazl Saadati Ranjbar, Ehsan Farzanegan, Behzad Suratgar, Amir Abolfazl Menhaj, Mohammad Bagher Amirkabir Univ Technol Dept Elect Engn Tehran Iran

ISBN: (纸本)9781728172965

Recently, studies on dynamics and control of Micro Electro Mechanical Systems (MEMS) has attracted control engineering researchers' attention, improving performance indexes, noise and disturbance rejection as well as handling of parametric uncertainties. This article objective is design of an observer-based sliding mode control (SMC) to improve tracking performance for the MEMS AC voltage reference sources (VRS). First off, a high gain observer for a nonlinear model of MEMS AC VRS is designed to estimate state variables of the system. The estimation speed of the states with the observer is so high that the observation error has no effect on the dynamical behaviour of this system. Secondly, SMC is put forth to ameliorate position tracking performance of the capacitive plate. The theory analysis and simulation yields demonstrate efficiency, robustness as well as optimality of the suggested controlling scheme for the tuneable capacitors in the MEMS AC voltage references. The simulation results are actually persuasive.

关键词： observer-based controller sliding mode control MEMS-based AC VRS MEMS device controller

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