Output Feedback Attitude Tracking for Spacecraft Under Control Saturation and Disturbance

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Qinglei Hu ◽  
Boyan Jiang ◽  
Youmin Zhang
Keyword(s):  
Output Feedback ◽  
Finite Time ◽  
External Disturbance ◽  
Input Saturation ◽  
Control Input ◽  
Time Stability ◽  
Finite Time Stability ◽  
Output Feedback Controller ◽  
Attitude Tracking ◽  
Control Saturation

This paper proposes a class of velocity-free attitude stable controller using a novel finite-time observer for spacecraft attitude tracking, which explicitly takes into account control input saturation to assure fast and accurate response and to achieve effective compensation to the effect of external disturbance as well. First, a novel semiglobal finite-time convergent observer is proposed to estimate the angular velocity in a finite-time under external disturbance. Then, a simple global output feedback controller is proposed by adoption of the designed finite-time observer. Rigorous proofs show that the proposed observer can achieve the finite-time stability and the controller rigorously enforces actuator magnitude constraints. Numerical simulations illustrate the spacecraft performance obtained using the proposed controller.

scholarly journals Finite Time Stability of Finance Systems with or without Market Confidence Using Less Control Input

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Chao Ma ◽  
Yujuan Tian ◽  
Zhongfeng Qu
Keyword(s):  
Finite Time ◽  
Chaotic Systems ◽  
Control Method ◽  
Control Input ◽  
Three Dimension ◽  
Time Stability ◽  
Finance System ◽  
Finite Time Stability ◽  
Single Controller ◽  
Simulation Results

In this paper, we make an exploration of a technique to control a class of finance chaotic systems. This technique allows one to achieve the finite time stability of the finance system more effectively with less control input energy. First, the finite time stability of three dimension finance system without market confidence is analyzed by using a single controller. Then, two controllers are designed to stabilize the four-dimension finance system with market confidence. Moreover, the finite time stability of the three-dimension and four-dimension finance system with unknown parameter is also studied. Finally, simulation results are presented to show the chaotic behaviour of the finance systems, verify the effectiveness of the proposed control method, and illustrate its advantages compared with other methods.

Robust spacecraft attitude tracking control with integral terminal sliding mode surface considering input saturation

2018 ◽  
Vol 41 (2) ◽  
pp. 405-416 ◽  
Author(s):  
Haitao Chen ◽  
Shenmin Song ◽  
Xuehui Li
Keyword(s):  
Finite Time ◽  
Sliding Mode ◽  
External Disturbance ◽  
Input Saturation ◽  
External Disturbances ◽  
Terminal Sliding Mode ◽  
Modeling Uncertainty ◽  
Finite Time Convergence ◽  
Attitude Tracking ◽  
Attitude Tracking Control

This paper studies the finite time spacecraft attitude tracking control problem, while considering modeling uncertainty, external disturbances and control input saturation. A novel integral terminal sliding mode surface (ITSMS) is designed by combining the fast terminal sliding mode surface (FTSMS) with a low pass filter to achieve a fast finite time convergence rate for the control system, without input singularity. An auxiliary signal is used to compensate for the effects of actuator saturation. The basic controller is first formulated based on the ITSMS, fast-TSM-type reaching law and auxiliary system, in the presence of an external disturbance and input saturation. Then, an adaptive control procedure is introduced, which simultaneously handles modeling uncertainty and external disturbance, thereby creating an adaptive attitude tracking controller. The proposed controller provides a fast finite time convergence rate for the control system, based on the newly designed ITSMS, while simultaneously compensating for modeling uncertainty, external disturbances and input saturation, without restricting the parameter selection process nor requiring repeated differentiation of nonlinear functions. Finally, digital simulation results are presented and demonstrate the effectiveness of the proposed controllers.

scholarly journals Finite-Time Stability and Stabilization of Switched Linear Time-Varying Systems with Time-Varying Delay

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Lulu Feng ◽  
Ping Zhao
Keyword(s):  
Finite Time ◽  
Linear Time ◽  
Average Dwell Time ◽  
Control Input ◽  
Time Varying ◽  
Time Stability ◽  
Finite Time Stability ◽  
Time Varying Delay ◽  
Time Varying Systems ◽  
Varying Delay

This paper deals with the finite-time stability (FTS) of switched linear time-varying (SLTV) systems with time-varying delay. Firstly, based on Lyapunov–Krasovskii functional technique and average dwell time (ADT) approach, a sufficient criterion on FTS for SLTV systems with time-varying delay is obtained. For the SLTV system with delay and control input, based on the criterion, a state feedback controller is designed such that the closed-loop system is finite-time stable (FTS). Finally, an example is employed to illustrate the validity of our results.

scholarly journals Finite-Time Output Feedback Control for a Rigid Hydraulic Manipulator System

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Yong-Sheng Hao ◽  
Zhi-Gang Su ◽  
Xiangyu Wang
Keyword(s):  
Output Feedback ◽  
Finite Time ◽  
Tracking Error ◽  
Output Feedback Control ◽  
Feedback Controller ◽  
Finite Time Stability ◽  
Output Feedback Controller ◽  
Analysis Process ◽  
Error System ◽  
Hydraulic Manipulator

The position tracking control problem of a hydraulic manipulator system is investigated. By utilizing homogeneity theory, a finite-time output feedback controller is designed. Firstly, a finite-time state feedback controller is developed based on homogeneity theory. Secondly, a nonlinear state observer is designed to estimate the manipulator’s velocity. A rigorous analysis process is presented to demonstrate the observer’s finite-time stability. Finally, the corresponding output feedback tracking controller is derived, which stabilizes the tracking error system in finite time. Simulations demonstrate the effectiveness of the designed finite-time output feedback controller.

Finite-time tracking control for extended nonholonomic chained-form systems with parametric uncertainty and external disturbance

2016 ◽  
Vol 24 (1) ◽  
pp. 100-109 ◽  
Author(s):  
Hua Chen ◽  
Binwu Zhang ◽  
Tiebiao Zhao ◽  
Tingting Wang ◽  
Kui Li
Keyword(s):  
Finite Time ◽  
Tracking Control ◽  
Visual Servoing ◽  
Sliding Mode ◽  
External Disturbance ◽  
Parametric Uncertainty ◽  
Stability Control ◽  
Time Stability ◽  
Trajectory Tracking Control ◽  
Finite Time Stability

In this paper, the finite-time tracking control problem is discussed for extended nonholonomic chained-form systems with parametric uncertainty, unmodeled nonlinear dynamics and external uncertain time-varying disturbances. Two decoupled subsystems are considered, for which an anti-interference controller is proposed by combining finite-time stability control theory and chattering-free sliding-mode design strategy in the presence of the uncertainty, nonlinearity and perturbation. Moreover, for the corresponding closed-loop systems under the given control law, rigorous finite-time stability analysis is presented at the origin equilibrium point. Finally, the main conclusions are applied to the trajectory tracking control of dynamic nonholonomic mobile robots with visual servoing feedback, and the simulation results show the effectiveness of our control design approach.

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