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The ride comfort is one of the main performance indexes of passenger train, which is related directly to the quality and the safety of train suspension. Along with the development and application of the high-speed train, the request of ride comfort to the train is more and more high. The quality of suspension system function influences the ride comfort of train directly. The traditional passive suspension has become incapacity in improving the ride comfort characteristics of train. Therefore, in recent years, the semi-active suspension system using computer control method has become the hot research topic between domestic and international.The thesis mainly studied on control system of the semi-active suspension thorough.After the thesis carried on analysis and comparison to constitution and work principle and application actuality of passive suspension, active suspension and semi-active suspension, it put forward the possibility and the practicability of the semi-active suspension system. Aiming at the characteristics of the semi-active suspension system, analyzing and comparing semi-active control strategy in existence, making sure sky-hook damping control strategy as control strategy of the semi-active suspension system.Then putting forward control project of semi-active suspension system, and carrying on the principle analysis and system design to the oil-damper of the high-speed switch valve control. Carrying on detailed analysis and design to memory,A/D conversion circuit, filter circuit, logic circuit, supply conversion circuit,clock circuit, resetting circuit, high-speed switch valve drive circuit etc. With the help of the Protel 99 SE software, drawing the hardware circuit.Base on DSP, in the CCS environment, designing mold soft of system, mainly including: initialization mold of the system, the collect mold of A/D data, integral calculation mold and sky-hook arithmetic mold etc. And drawing up corresponding software procedure, giving anti-jamming measure of system.At last, in SIM99 of the Protel 99 SE, drawing up simulation basic process of the system hardware circuit. Designing hardware simulation circuit, carrying on simulation research to the hardware circuit, validating rationality and feasibility of hardware circuit.
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