Fault simulation device for automobile electric power-assisted steering system

Abstract

The invention discloses a fault simulation device for an automobile electric power-assisted steering system. The fault simulation device comprises a human-machine interface module, a fault signal generation module and a fault signal output module, wherein the human-machine interface module comprises a matrix keyboard and display equipment; the fault signal generation module comprises a singlechip with built-in fault signal simulation software; the fault signal output module comprises a torque fault signal output circuit, an automobile speed and engine rotating speed fault signal output circuit, a motor fault signal output circuit and a controller abnormal voltage output circuit; fault signals generated by the singlechip through the software are respectively amplified or opening and closing operation of a relay contact is finished, so that various faults possibly met by the automobile electric power-assisted steering system (EPS) can be simulated; and corresponding results are output to an EPS controller through an equipment under control (ECU) interface circuit. The fault simulation device can be used for simulating various faults possibly met by the EPS, developing a fault diagnosis procedure of the EPS controller and performing fault response test, so that the reliability and the safety of the EPS when the EPS meets the fault can be evaluated.

Description

technical field [0001] The invention relates to a vehicle failure simulation device, in particular to a vehicle electric power steering system failure simulation device. Background technique [0002] For the traditional hydraulic power steering system, the automobile electric power steering system (EPS) relies on the motor to provide power, which has the advantages of variable power characteristics, energy saving and simple structure, and is gradually replacing the traditional hydraulic power steering in the field of small and medium-sized cars. system. EPS is mainly composed of controller, torque sensor, motor, reducer, mechanical steering system, etc. As the steering control device of the car, the controller (EPS controller) of the car electric power steering system must not only control the function of the motor to provide steering assistance, but also have the function of fault diagnosis, so that when the system is abnormal, it can be corrected. response to ensure driv...

AI Technical Summary

Problems solved by technology

This research and development method not only requires the input of manpower and material resources, but also some dangerous faults are difficult to realize real vehicle simulation due to their difficulty.

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