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Power-assisted steering system with robust stability

An electric power steering and stable performance technology, applied in the automotive field, can solve the problems of cumbersome, poor robustness, time-consuming, etc., and achieve the effect of improving robustness and stability

Inactive Publication Date: 2009-03-04
TRW AUTOMOTIVE COMPONENTS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is very cumbersome and requires designers to have considerable debugging experience, and the robustness is not good. For different steering assist characteristic curves, or for different steering systems, it needs to be re-tuned, which is very time-consuming.

Method used

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  • Power-assisted steering system with robust stability
  • Power-assisted steering system with robust stability
  • Power-assisted steering system with robust stability

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0032] The electric power steering system with robust and stable performance is composed of traditional mechanical steering system (mainly including steering wheel, steering shaft, steering gear, steering rod mechanism, steering wheel) with torque sensor, electronic control unit, power steering motor and its Composed of deceleration mechanism. Among them, the torque sensor is installed on the steering shaft to detect the driver's hand torque; the electronic control unit calculates the drive current value that needs to be provided to the booster motor according to the current vehicle driving conditions and the size of the hand torque; the booster motor is generally installed on the steering shaft On, or on the steering gear, the driver is provided with an assist torque through the reduction mechanism; generally speaking, the control program of t...

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Abstract

The present invention provides an electric power steering system with the robust stability performance. The electric power steering system consists of a traditional mechanical steering system (which mainly comprises a steering disc, a steering shaft, a steering device, a steering tie bar mechanism and a steering wheel), a sensor torque, an electronic control unit, a steering power motor and a speed reducing mechanism. The present invention adopts the H infinity robust control method to determine the electric power steering system, and the robust controller has excellent robust stability for the perturbation of the system. Simultaneously, the present invention also provides successful price reducing and fixed-point treatment for the robust controller, and thus successfully realizing the control algorithm with a cheap vehicle control chip. The commissioning experiment proves that the present invention is effective, and the present invention has significance for the industrial production of the electric power steering system.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to an electric power steering system, in particular to an electric power steering system (Electric Power Steering System, EPS for short) with robust and stable performance. Background technique [0002] Electric power steering system is composed of traditional mechanical steering system (mainly including steering wheel, steering shaft, steering gear, steering rod mechanism, steering wheel) with torque sensor, electronic control unit, power steering motor and its reduction mechanism. Among them, the torque sensor is installed on the steering shaft to detect the driver's steering torque; the electronic control unit calculates the driving current value that needs to be provided to the booster motor according to the current vehicle driving conditions and the magnitude of the steering torque; the booster motor can be installed on the steering shaft or steering On the gear, the driver i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/36G05B13/02
Inventor 陈慧刘庆郑鸿云
Owner TRW AUTOMOTIVE COMPONENTS SHANGHAI
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