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Paper details
Number 2 - June 2022
Volume 32 - 2022
A multi-model based adaptive reconfiguration control scheme for an electro-hydraulic position servo system
Zhao Zhang, Zhong Yang, Shuchang Liu, Shuang Chen, Xiaokai Zhang
Abstract
Reliability and safety of an electro-hydraulic position servo system (EHPSS) can be greatly reduced for potential sensor
and actuator faults. This paper proposes a novel reconfiguration control (RC) scheme that combines multi-model and
adaptive control to compensate for the adverse effects. Such a design includes several fixed models, one adaptive model,
and one reinitialized adaptive model. Each of the models has its own independent controller that is based on a complete
parametrization of the corresponding fault. A proper switching mechanism is set up to select the most appropriate controller
to control the current plant. The system output can track the reference model asymptotically using the proposed method.
Simulation results validate robustness and effectiveness of the proposed scheme. The main contribution is a reconfiguration
control method that can handle component faults and maintain the acceptable performance of the EHPSS.
Keywords
fault tolerant control, electro-hydraulic position servo system, multiple models, adaptive control, reconfiguration control