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International Journal of Automotive Technology > Volume 17(6); 2016 > Article
International Journal of Automotive Technology 2016;17(6): 1091-1100.
doi: https://doi.org/10.1007/s12239-016-0106-x
MODEL-INDEPENDENT SELF-TUNING FAULT-TOLERANT CONTROL METHOD FOR 4WID EV
Y. LUO, J. LUO, Z. QIN
Tsinghua University
ABSTRACT
To solve the problem of the existing fault-tolerant control system of four-wheel independent drive (4WID) electric vehicles (EV), which relies on fault diagnosis information and has limited response to failure modes, a modelindependent self-tuning fault-tolerant control method is proposed. The method applies model-independent adaptive control theory for the self-tuning active fault-tolerant control of a vehicle system. With the nonlinear properties of the adaptive control, the complex and nonlinear issues of a vehicle system model can be solved. Besides, using the online parameter identification properties, the requirement of accurate diagnosis information is relaxed. No detailed model is required for the controller, thereby simplifying the development of the controller. The system robustness is improved by the error based method, and the error convergence and input-output bounds are proved via stability analysis. The simulation and experimental results demonstrate that the proposed fault-tolerant control method can improve the vehicle safety and enhance the longitudinal and lateral tracking ability under different failure conditions.
Key Words: Fault-tolerant control, Four-wheel independent drive electric vehicles, Model-independent adaptive control, Multiple actuators fault
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