Nonlinear Robust Adaptive Control Using Direct Adaptive Method

The problem of robust adaptive stabilization of a class of multi-input nonlinear systems with unknown parameters and structure has been considered. By employing the direct adaptive method to a general nonlinear adaptive system, a robust adaptive controller is designed to complete the global asymptotically stability of the system states. Some simulations are provided to illustrate the effectiveness of the proposed method.

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Robust Adaptive Control Based on Fuzzy Compensation for Ammunition Auto-Loading Manipulator

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.415.271 ◽

2013 ◽

Vol 415 ◽

pp. 271-275

Author(s):

Yu Feng Li ◽

Kui Wu Li ◽

Yu Tian Pan ◽

Bao Quan Guo

Keyword(s):

Control System ◽

External Disturbance ◽

Adaptive Controller ◽

Robust Adaptive Control ◽

Dynamic Features ◽

System A ◽

Modeling Errors ◽

Robust Adaptive ◽

Robust Adaptive Controller ◽

Manipulator Control

Aimed at the problems of low control accuracy and weak robustness influenced by external disturbance, friction, load changes, modeling errors and other issues in ammunition auto-loading manipulator control system, a new robust adaptive controller based on fuzzy compensation is proposed. The control architecture employs fuzzy systems to compensate adaptively for plant uncertainties to distinguish different disturbance compensation terms and approximate each of them respectively. As a result, the control system has great dynamic features and robust stability and meet the requirement that the actual motion of ammunition auto-loading manipulator quickly tracks the scheduled trajectory.

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Robust Adaptive Control Based on Specified Region Pole Assignment for Flexible Hypersonic Vehicle

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.128-129.270 ◽

2011 ◽

Vol 128-129 ◽

pp. 270-275

Author(s):

Zhi Gao Feng

Keyword(s):

Dynamic Performance ◽

Adaptive Controller ◽

Pole Assignment ◽

Hypersonic Vehicle ◽

Open Loop ◽

Robust Adaptive Control ◽

Robust Controller ◽

Robust Adaptive ◽

Robust Adaptive Controller ◽

Control Failures

This paper describes a robust adaptive controller based on specified region pole assignment for flexible hypersonic vehicle. The dynamic model of air-breathing hypersonic vehicle retains features including flexible effects, non-minimum phase behavior, model uncertainties, and strong couplings between flight dynamic and engine. To track velocity and altitude commands, robust controller based on specified region pole assignment is used to make unstable modes of open-loop system stable and guarantee dynamic performance of attitude. Meanwhile adaptive controller is proposed to solve tracking problems when existing control failures or saturation. The simulation results demonstrate that the proposed controller achieves excellent dynamic performance while the engine operates normally.

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Research on the Tracking Problem of Chaotic Systems with Static Uncertain Function and Unknown Parameters

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.66-68.220 ◽

2011 ◽

Vol 66-68 ◽

pp. 220-223 ◽

Cited By ~ 1

Author(s):

Wei Ming Sun ◽

Xin Yu Wang ◽

Jun Wei Lei

Keyword(s):

General Class ◽

Chaotic Systems ◽

Engineering Application ◽

Adaptive Controller ◽

Tracking Problem ◽

Unknown Parameters ◽

Robust Adaptive ◽

Robust Adaptive Controller

Considering the situation with both unknown multi-parameters and uncertain multi- functions, a robust adaptive controller was constructed to solve the tracking problem of a general class of chaotic systems. What is worthy pointing out is that the uncertainties are assumed to be bounded with triangular functions which is meaningful in engineering application.

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