A hardware-in-the-loop performance test bench suitable for automotive c-eps system

Abstract

The present invention provides a hardware-in-loop performance testing stand suitable for an automobile C-EPS system. The hardware-in-loop performance testing stand includes an oblique plane support platform, a steering wheel mounted above the stand face, a C-EPS steering column assembly, a steering resisting simulator, an automatic steering motor, a measurement and control system based on a dSPACE real-time simulation platform, a remote control main power box, support ground castors and the like. A lower inertia AC servo motor is used to initiatively load the C-EPS steering system on the hardware-in-loop performance testing stand through a L type planetary reducer. The automatic steering motor can replace a tester for testing in part of open-loop tests. The influences, such as friction, damp and inertia existed in the L type planetary reducer, on the resistance load is considered and the corresponding compensation control is performed during the simulation process of the steering resisting torque. Compared to other electric power steering testing stands, the hardware-in-loop performance testing stand can realize the development and performance testing of an EPS control system by utilizing the precious steering resistance simulation, and the hardware-in-loop performance testing stand is compact in structure and is movable.

Description

technical field [0001] The invention belongs to the field of automobiles, and relates to the test of an electric power steering system of an automobile, in particular to a hardware-in-the-loop performance test bench of an automobile C-EPS control development system. Background technique [0002] With the development of automobile technology, power steering system has become the standard setting of some cars, and the proportion of electric power steering system (EPS) used in the world is increasing. EPS can improve the driver's comfort and safety while driving, and reduce the Environmental pollution and energy consumption are the focus of current research on automotive steering systems. At present, the design parameters and performance indicators of my country's independent EPS products have not yet been perfected, and a large number of actual vehicle tests are required in the process of research and development and design. The actual vehicle test is an important means to te...

AI Technical Summary

Problems solved by technology

Steering input includes manual operation and automatic operation. Manual operation input and automatic steering operation input have their own advantages and disadvantages: the former has the advantage that it can be used in closed-loop tests without professional equipment, but the repeatability is poor, and it is greatly affected by the level of the tester. The operation cannot be completed or the effect is not good; the latter has good repeatability and can complete precise and complex operations; but the latter is only used for open-loop tests and requires steering motors

[0004] However, the existing electric power assist system performance test device still cannot effectively replace the operation actions of professional drivers, cannot flexibly select manual input steering actions or automatic steering actions, cannot replace real vehicle tests to a certain extent, and does not consider the use of steering The resistance motor is used as the mechanical system compensation problem of steering resistance loading, that is, the problem of accurately loading the steering resistance with the steering resistance simulation motor

There is also no online debugging of relevant parameters of the compensation control algorithm and collection and storage of relevant experimental results on the test bench.

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