Dual Closed-Loop Electric Power Steering System on the Mixed H₂/H_∞ Control Strategy

Abstract:

Aiming at the request of EPS system for the robust stability and the dynamic characteristic, the dynamics model of an electric power steering system (EPS) is established , the outer ring mixed H₂/H_∞ control based on genetic algorithm decides the values of the target torque and solves the perturbation problem, the inner ring control with PID control algorithm will never compromise with current real-time control. Simulation results show that the application of mixed H₂/H_∞ in the outer ring for current decision can make the EPS system stable and realize the ideal control performance, can also obtain the low frequency information from the surface of the road and depress the high frequency interference.With the application of current tracking loop PID control, EPS system has good dynamic characteristics of the target current real-time tracking, so that electric power steering system has better stability and traking performence.

• Periodical: Applied Mechanics and Materials (Volumes 716-717)
• Pages: 1582-1586
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.716-717.1582
• Online since: December 2014
• Authors: Wan Ying Wei*, Jin Ying Chen, Hong Lian Li
• Keywords: Electric Power Steering (EPS), Genetic Algorithm (GA), Mechatronic Dual Closed-Loop, Mixed H₂/H_∞ Control, PID Control

References

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