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On-line RNN compensated second order nonsingular terminal sliding mode control for hypersonic vehicle

International Journal of Intelligent Computing and Cybernetics 2012年第2期5卷 186-205页

作者： Ruimin Zhang Li Wang Yingjiang Zhou School of Automation Southeast UniversityNanjingChina and School of Mathematics and StatisticsHenan University of Science and TechnologyLuoyangChina School of Automation Southeast UniversityNanjingChina

Purpose–The purpose of this paper is to design a robust control scheme to achieve robust tracking of velocity and altitude commands for a general hypersonic vehicle(HSV)in the presence of parameter variations and external ***/methodology/approach–The robust control scheme is composed of nonsingular terminal sliding mode control(NTSMC),super twisting control algorithm(STC)and recurrent neural network(RNN).First,by combing a novel NTSMC and STC algorithm,a second order NTSMC approach for HSV is proposed to provide fast,continuous and high precision tracking *** to relax the requirements for the bounds of the lumped uncertainties in control design,a RNN disturbance observer is presented to increase the robustness of the control *** weights of RNN are updated by adaptive laws based on Lyapunov theorem,thus the closed-loop stability can be ***–Simulation results demonstrate that the proposed method is effective,leading to promising ***/value–The main contributions of this work are:first,both parameter variations and external disturbances are considered in control design for the longitudinal dynamic model of HSV;and second,the proposed controller can remove chattering and achieve more favorable tracking performances than conventional sliding mode control.

关键词： nonsingular terminal sliding mode control Hypersonic vehicle Super twisting control algorithm Recurrent neural network Second order sliding mode control Hypersonic flow Neural nets

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nonsingular terminal sliding mode control of Active Power Filter

Nonsingular Terminal Sliding Mode Control of Active Power Fi...

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第37届中国控制会议

作者： Shixi Hou Juntao Fei Yundi Chu College of IOT Engineering Hohai University

In this paper, a nonsingular terminal sliding mode control（NTSMC） is proposed for active power filter（APF） to attenuate the effect of unknown external disturbances and modeling uncertainties. Firstly, the dynamic model for APF is build in which both the system parameter variations and external disturbance are considered. Then a nonsingular terminal sliding mode control based on backstepping（NTSMCB） approach is presented for current tracking control system to solve singularity point problem and realize the fast and finite time convergence. The parameters are derived from the Lyapunov stability analysis to guarantee tracking performance and stability of the closed-loop system. Simulation studies in the MATLAB/Sim Power Systems Toolbox demonstrate that the proposed control methods offer a good behavior in both steady state and transient operation compared to traditional sliding mode control.

关键词： Active power filter nonsingular terminal sliding mode control backstepping method finite time convergence

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Fractional Order Fixed-time nonsingular terminal sliding mode control for Chaotic Oscillation in Power System 36

Fractional Order Fixed-time Nonsingular Terminal Sliding Mod...

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第36届中国控制会议

作者： Junkang Ni Ling Liu Chongxin Liu Xiaoyu Hu Lin Cheng State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong University State Grid Shaanxi Electric Power Research Institute

ISBN: (纸本)9781538629185

Chaotic oscillation is a harmful phenomenon for power system and it threatens the safe and stable operation of power system. This paper presents fractional order fixed-time nonsingular terminal sliding mode control to suppress chaos in power system. A novel fractional order terminal sliding mode surface is first proposed to guarantee the fixed-time convergence of system states along the sliding surface, and then a nonsingular terminal sliding mode controller is designed to force the system states to reach the sliding surface within fixed-time and stay on it forever. Furthermore, the fixed-time stability and the robustness of the proposed control scheme are proved using the fractional Lyapunov stability theory. Finally, the proposed control scheme is applied to suppress chaos in fractional order power system and simulation results demonstrate the effectiveness of the proposed control scheme.

关键词： Chaos suppression Power system Fixed-time control nonsingular terminal sliding mode control Fractional order control

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Fixed-Time nonsingular terminal sliding mode control with Compound sliding Surface

Fixed-Time Nonsingular Terminal Sliding Mode Control with Co...

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第40届中国控制会议

作者： Huijie Li Yuanli Cai Institute of control Engineering Xi’an Jiaotong University

A nonsingular terminal sliding mode（NTSM） control scheme with fixed-time convergence is proposed for a class of second-order nonlinear systems subject to matched uncertainties and external disturbances. A compound sliding surface is firstly constructed to eliminate the singularity and the upper bound of convergence time is estimated. A fixed-time NTSM controller is then developed and a guaranteed upper bound of the closed-loop settling time independent of initial states is presented based on the phase plane analysis and Lyapunov stability theory. Finally, a lot of simulations for a single inverted pendulum system are conducted to validate the effectiveness of the proposed methodology.

关键词： Fixed-time stability nonsingular terminal sliding mode control compound sliding surface nonlinear system

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Improved nonsingular terminal sliding mode controller Design for High-order Systems

Improved Nonsingular Terminal Sliding Mode Controller Design...

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2009中国控制与决策会议

作者： Zhe Gao,Weian Guo,Yan Zheng Information Science and Engineering,Northeastern University,Shenyang 110004,China

＜正＞An improved design method of nonsingular terminal sliding mode control is proposed in this *** is shown that,by selecting a novel nonlinear sliding surface,the controller is obtained which drives the states of high-order systems to reach the equilibrium from any initial states in finite ***,an improved nonsingular terminal sliding mode controller is designed which effectively solves the singularity problem and reduces the *** results show the validity of the new method.

关键词： nonsingular terminal sliding mode control High-order Systems sliding mode surface

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An adaptive fast fixed-time guidance law with an impact angle constraint for intercepting maneuvering targets

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Chinese Journal of Aeronautics 2018年第6期31卷 1327-1344页

作者： Yao ZHANG Shengjing TANG Jie GUO Key Laboratory of Dynamics and control of Flight Vehicle Ministry of Education School of Aerospace Engineering Beijing Institute of Technology

sliding mode guidance laws based on a conventional terminal sliding mode guarantees only finite-time convergence, which verifies that the settling time is required to be estimated by selecting appropriate initial launched conditions. However, rapid convergence to a desired impact angle within a uniform bounded finite time is important in most practical guidance applications. A uniformly finite-time/fixed-time convergent guidance law means that the convergence（settling） time is predefined independently on initial conditions, that is, a closed-loop convergence time can be estimated a priori by guidance parameters. In this paper, a novel adaptive fast fixed-time sliding mode guidance law to intercept maneuver targets at a desired impact angle from any initial heading angle,with no problems of singularity and chattering, is designed. The proposed guidance law achieves system stabilization within bounded settling time independent on initial conditions and achieves more rapid convergence than those of fixed-time stable control methods by accelerating the convergence rate when the system is close to the origin. The achieved acceleration-magnitude constraints are rigorously enforced, and the chattering-free property is guaranteed by adaptive switching *** numerical simulations are presented to validate the efficiency and superiority of the proposed guidance law for different initial engagement geometries and impact angles.

关键词： Adaptive gain tuning Fixed-time convergence Impact angle constraint Missile guidance nonsingular terminal sliding mode control

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terminal sliding mode Fuzzy control Based on Multiple sliding Surfaces for Nonlinear Ship Autopilot Systems

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Journal of Marine Science and Application 2010年第4期9卷 425-430页

作者：袁雷吴汉松 Department of Electrical and Information Engineering Naval University of Engineering

A terminal sliding mode fuzzy control based on multiple sliding surfaces was proposed for ship course tracking steering, which takes account of rudder characteristics and parameter uncertainty. In order to solve the problem, the controller was designed by employing the universal approximation property of fuzzy logic system, the advantage of Nussbaum function, and using multiple sliding mode control algorithm based on the recursive technique. In the last step of designing, a nonsingular terminal sliding mode was utilized to drive the last state of the system to converge in a finite period of time, and high-order sliding mode control law was designed to eliminate the chattering and make the system robust. The simulation results showed that the controller designed here could track a desired course fast and accurately. It also exhibited strong robustness peculiarly to system, and had better adaptive ability than traditional PID control algorithms.

关键词： ship course control unmatched uncertainty multiple sliding mode control nonsingular terminal sliding mode control robustness

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Fast Convergent nonsingular terminal sliding mode Guidance Law with Impact Angle Constraint

Fast Convergent Nonsingular Terminal Sliding Mode Guidance L...

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第37届中国控制会议

作者： Kuanqiao Zhang Suochang Yang Department of Missile Engineering Army Engineering University

In this paper, a nonsingular, essentially continuous and finite time fast convergent guidance law with impact angle constraint for some missiles attacking the targets with zero miss-distance and terminal impact angle constraint is presented by using terminal sliding mode control and finite time control theories. First, in order to avoid the singularity of terminal sliding mode control, and make the state variables achieve the equilibrium point in finite time, a fast convergent nonsingular terminal sliding mode control algorithm is improved. In the algorithm, the fast convergent nonsingular sliding mode function is employed to construct the sliding surface, and an adaptive exponential reaching law is employed to the reaching, so the system trajectory converges quickly from any initial state to the equilibrium point in the entire reaching phase. Then, a fast convergent nonsingular terminal sliding mode guidance law with impact angle constraint is presented base on this algorithm. Finite time control theory is used to analyze the convergence of the guidance law. Due to its inherent nonsingularity attribute, continuity and faster convergent rate, higher tracking precision of the desired impact angle in a shorter time interval with smoother guidance command can be guaranteed compared with conventional terminal sliding mode guidance law. A number of numerical simulation examples are implemented to justify the effectiveness of the proposed guidance law.

关键词： guidance law impact angle constraint nonsingular terminal sliding mode control exponential reaching law finite time convergence

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Super-Twisting Disturbance Observer Based Finite-Time Attitude control for Combined Spacecraft 32

Super-Twisting Disturbance Observer Based Finite-Time Attitu...

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第32届中国控制与决策会议

作者： ZHANG Wei YUN Weijun GUO Yanning LV Yueyong Harbin Institute of Technology

ISBN: (纸本)9781728158549

The finite-time attitude control problem for combined spacecraft with non-cooperative target is investigated in this paper. First, a novel dynamic model is developed using the interaction torque between the service and target spacecraft. Next, a super-twisting disturbance observer is improved to estimate the generalized disturbance for the service spacecraft in finite time. Then, a nonlinear terminal sliding mode attitude controller is designed for the combined spacecraft so as to converge the attitude system in finite time. Finally, numerical simulations validate the feasibility of the proposed controller.

关键词： Combined spacecraft Super-twisting disturbance observer Finite-time nonsingular terminal sliding mode control

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Non-singular terminal sliding mode Attitude Tracking control of UAVs with External Disturbances

Non-singular Terminal Sliding Mode Attitude Tracking Control...

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第43届中国控制会议

作者： Hao Sun Na Duan Zhizheng Xu School of Electrical Engineering & Automation Jiangsu Normal University

This paper addresses a nonsingular terminal sliding mode control scheme for a quadrotor unmanned aerial vehicle(UAV) in the presence of external disturbances. By analyzing the dynamic characteristics of a quadrotor UAV, the model is decoupled into position subsystem and attitude subsystem. nonsingular terminal sliding mode control can avoid the chattering problems of traditional sliding mode control and singularity problems of terminal sliding mode control. The stability of the closed-loop system is analyzed, and the tracking error is asymptotically stable. The effectiveness of the proposed control scheme is verified by simulation results.

关键词： Unmanned aerial vehicles nonsingular terminal sliding mode control Attitude tracking control Finite-time stable

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