101. Integrated fault‐tolerant control for a 3‐DOF helicopter with actuator faults and saturation
- Author
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Ron J. Patton, Xiaoyuan Zhu, and Jianglin Lan
- Subjects
0209 industrial biotechnology ,Control and Optimization ,Adaptive control ,Observer (quantum physics) ,Computer science ,020208 electrical & electronic engineering ,Control reconfiguration ,Control engineering ,Fault tolerance ,02 engineering and technology ,Fault (power engineering) ,Computer Science Applications ,Human-Computer Interaction ,020901 industrial engineering & automation ,Control and Systems Engineering ,Control theory ,Robustness (computer science) ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,Actuator - Abstract
© The Institution of Engineering and Technology 2017. This study proposes a fault estimation (FE)-based fault-tolerant control (FTC) strategy to maintain system reliability and achieve desirable control performance for a 3-DOF helicopter system with both actuator drift and oscillation faults and saturation. The effects of the faults and saturation are combined into a composite non-differentiable actuator fault function, which is approximated by a differentiable function and estimated together with the system state using a non-linear unknown input observer. An adaptive sliding mode controller based on the estimates is developed to compensate the effects of the faults and saturation. Taking into account the bi-directional robustness interactions between the FE and FTC functions, an integrated design approach is proposed to obtain the observer and controller gains in a single step, so as to achieve robust overall FTC system performance. In fault-free cases, the proposed strategy can be considered as a new approach for anti-windup control to compensate the effect of input saturation. Comparative simulations are provided to verify the effectiveness of the proposed design under different actuator fault scenarios.
- Published
- 2017