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Adaptive actuator failure compensation and disturbance rejection scheme for spacecraft

Journal of Systems Engineering and Electronics 2014年第4期25卷 648-659页

作者： Xuelian Yao Gang Tao Ruiyun Qi College of Automation Engineering Nanjing University of Aeronautics and Astronautics Department of Electrical and Computer Engineering University of Virginia

An adaptive actuator failure compensation scheme is proposed for attitude tracking control of spacecraft with unknown disturbances and uncertain actuator failures. A new feature of this adaptive control scheme is the adaptation of the failure pattern parameter estimates, as well as the failure signal parameter estimates, for direct adaptive actuator failure compensation. Based on an adaptive backstepping control design, the estimates of the disturbance parameters are used to solve the disturbance rejection problem. The unknown disturbances are compensated completely with the stability of the whole closed-loop system. The scheme is not only able to accommodate uncertain actuator failures, but also robust against unknown external disturbances. Simulation results verify the desired adaptive actuator failure compensation performance.

关键词： actuator failure compensation adaptive control failurepattern disturbance estimation spacecraft stability and tracking.

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A parameter estimation based adaptive actuator failure compensation control scheme

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Journal of Systems Engineering and Electronics 2011年第1期22卷 1-11页

作者： Gang Tao Ruiyun Qi Chang Tan Depamnent of Electrical and Computer Engineering University of Virginia Charlottesville VA 22904 USA College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 E R. China

An adaptive actuator failure compensation control scheme is developed using an indirect adaptive control method,by calculating the controller parameters from adaptive estimates of system parameters and actuator failure parameters.A key technical issue is how to deal with the actuator failure uncertainties such as failure pattern,time and values.A complete parametrization covering all possible failures is used to solve this issue for adaptive parameter estimation.A simultaneous mapping from the estimated system/failure parameters to the controller parameters is employed to make the control system capable of ensuring the desired system performance under failures,which is verified by simulation results.

关键词： actuator failure compensation adaptive control failure pattern and values parameter estimation stability and tracking uncertainty parametrization.

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维普期刊数据库

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Adaptive actuator failure and disturbance compensation scheme for MIMO feedback linearizable systems

Adaptive actuator failure and disturbance compensation schem...

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第37届中国控制会议

作者： Xuelian Yao Yi Yang Ruochen Liu Jiangsu University of Technology

A feedback linearization based adaptive control scheme is developed for multivariable nonlinear systems with redundant actuators subject to uncertain failures and unknown unmatched input disturbances. Such an adaptive controller contains a direct adaptive actuator failure compensator to compensate the uncertain actuator failure, a nonlinear feedback to linearize the nonlinear dynamics, and a linear feedback to stabilize the linearized system. Based on the feedback linearization design, a nominal output rejection scheme is first developed, for which the relative degree characterisation of the control and disturbance system models from multivariable nonlinear systems is specified as a key design condition for this disturbance rejection *** direct control signal adaptation, the adaptive failure compensation design ensures closed-loop stability and asymptotic output tracking in the presence of actuator failure uncertainties. Simulation results are presented to verify the desired system performance with adaptive actuator failure and disturbance compensation.

关键词： actuator failure compensation Adaptive Control Disturbance Rejection failure Pattern Stability and Tracking

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