Analysis on EPS Machitrical Dual Closed-Loop Control System

Abstract:

The electric power steering system (EPS) is a combination of mechanical and electrical control system. EPS’control strategy used commonly has two kinds: current PID control and fuzzy control .The current PID control based on the difference between target current and feedback current is a curren closed-loop control system and the fuzzy control is a mechanical closed-loop control system based on the difference between forces of the upper part and the lower part of the steering shaft . Taking the margin of the mechanical and electrical closed-loop control system, this paper, a torque feedback loop for the outer ring, a current feedback loop as the inner loop, designed a dual-loop control system, the output of the fuzzy control determined a target current, and then proceed to current PID control, fast-track the target torque. The simulation shows the dual closed-loop fuzzy PID control is superior to two commonly used control strategies so that electric power steering system has a better tracking ability and stability.

• Periodical: Applied Mechanics and Materials (Volumes 241-244)
• Pages: 1071-1075
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.241-244.1071
• Online since: December 2012
• Authors: Wan Ying Wei*, Jin Ying Chen, Gang Xie
• Keywords: Current PID Control, EPS, Fuzzy Control, Fuzzy PID-Control, Mechatronic Dual Closed-Loop

References

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