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Research and Realization on Electric Power Steering Control System

Author: Shang
Tutor: XuZhenLin
School: Tianjin University
Course: Power Electronics and Power Drives
Keywords: Electric power steering system Three control two compensation Composite Control Neural Networks An electronic control unit Digital Signal Processor Comprehensive development of the experimental platform
CLC: U463.4
Type: Master's thesis
Year: 2004
Downloads: 473
Quote: 6
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Abstract


Automotive electric power steering (EPS) system has incomparable advantages of conventional hydraulic power steering system is the inevitable trend of development of the automotive power steering. Intensive research two aspects of the system from the control strategy and control system design, comprehensive development of the experimental platform developed electric power steering system, and control system developed based on the core - the electronic control unit (controller) . The subject fully reflect the combination of mechatronics, modern power transmission and its computer control technology and automotive engineering. According to the actual physical object, dynamic mathematical model for the establishment of a system of three degrees of freedom. Draw the basic equation for the steering system on the basis of the analysis of the system model, proposed three control two compensation control thinking, the overall structure of the the system current feedforward composite control strategy. Assist Characteristic of the key technologies for electric power steering systems analysis and research. According to the characteristics of mathematical model and help features, the proposed method of calculation of any speed steering wheel torque and motor assist torque nonlinear relationship. Steering dead zone for the presence of electric-assisted steering system characteristics, power steering area and turned to the non-linear characteristics as well as the speed of the saturated zone discretization form help blind spot, this paper, based on neural network to assist characteristic curve fitting thought experiment research. The theoretical analysis and experimental results. Achieve the full speed range of nonlinear power steering system, overcome power steering blind, to confirm the accuracy of this method. DC motor control system to a Motorola digital signal processor (DSP) for the core controller to the electric power steering system as a control object, self-developed hardware circuitry and software program of the electronic control unit, a complete set of electric steering embedded The control system solutions. In the comprehensive development of the experimental platform to complete the system development and experimental, experimental results are given. The experimental results demonstrate the feasibility of the scheme, the system has a good dynamic and static performance. Protection system development and experimental research, the subject of their own development of electric power steering system of the comprehensive development of the experimental platform, making the signal processing module, and to develop the control software of the host computer. The integrated development environment consisting of three necessary conditions to carry out the research and development of the system, greatly promoted the research. Finally, so that the study of this subject can really be used for the actual paper proposes a systems engineering design thinking, research and design, systems engineering, and electromagnetic compatibility program developed in the laboratory results and productivity. The system not only meet performance design requirements, but also has a higher stability, reliability, immunity to meet the requirements of the automobile industry level.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Steering system
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