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Actuator-Redundancy-Based Fault Diagnosis for Four-Wheel Independently Actuated Electric Vehicles

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2 Author(s)
Rongrong Wang ; Sch. of Mech. Eng., Southeast Univ., Nanjing, China ; Junmin Wang

This paper presents a real-time actuator-redundancy-based fault diagnosis approach for four-wheel independently actuated (FWIA) in-wheel motor electric ground vehicles. The tire-road friction coefficient (TRFC), which is usually unknown, needs to be accurately estimated to calculate the in-wheel motor torque and evaluate the fault in real time. An observer is applied to each of the in-wheel motors to generate a TRFC estimate from the respective wheel. The individual estimates of the TRFC are merged using a voting scheme, which can reject the erroneous estimate from the faulty motor. Then, the resulting accurate TRFC estimate is adopted to calculate the residual for each of the in-wheel motors and to detect the possible actuator fault. Experimental results from a prototype FWIA electric ground vehicle are given to show the effectiveness of the proposed fault diagnosis method.

Published in:

Intelligent Transportation Systems, IEEE Transactions on  (Volume:15 ,  Issue: 1 )

Date of Publication:

Feb. 2014

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