| The suspension is one of important automobile assembly. It links body and wheels elasticity. It transfers the force and moment between wheels and body. It guarantees automobile's ride performance and handling stability. And guarantee automobile's normal running. With the high-speedy development of social economy, human life level has been made progress continuously. Automobile's ride performance and handling stability must have a higher demand. The tradition passivity hangs to demand because of own limitation is difficult to be satisfied with gradually. Partly active dangerous rack cost is lower. Effect is under the control of fairly good. Nature price is comparatively high. Become the hot spot that automobile new technique goes into hits the target in recent years therefore gradually. It has aroused broad taking seriously.With the electron, the technology, PC control development of technology and modern control theory in recent years. Mix up the go into that the manpower nerve network under the control of, the forecast wait for under the control of. under the control of to dangerous rack of automobile optimal control , self fit in with under the control of, getting the achievement making people focus attention upon not only in terms of theory. The thesis based on MPC, have developed the same stuff putting up system controller owing to that half initiative of DSP hangs. And the basis in adjustable damp shock absorber is more and better. It uses TMS320F2812, an advanced and powerful 32-bit fixed point model of TMS320F2812 series, as its ECU.The thesis is aimed at 1/4 car body model first. It has built the dynamics model. And then have built the simulated partly active dangerous rack system computer model that the forecast controls on whose basis, and simulation analysis by SIMULINK has been carried on the systems control performance. It is seen that selected by the control method and the control strategy have the very good control effect through the simulation analysis, which can be used as the control logic of the semi- active suspension system controller.Then the function of the semi- active suspension system ECU is multi-analysis, and the research on ECU has be developed take DSP TMS320F2812 as microprocessor. The control unit has real-time data signal gathering and the system's control function, according to data signal which gathers, the definite goal current of motor is outputted, and the PWM pulse-duration modulation technology is used. Be based on the data signal collecting. Ascertain the step-by-step electric motor step-by-step pulse number and revolution direction. The shock absorber damp carries out adjustment on adjustable damp.After the hardware circuit design has been carried on, the corresponding software procedure has been established. The software procedure has used based on the severance modular design method, realized the data acquisition, MPC, and the revolution realizing step-by-step electric motor drive adjustable damp shock absorber damp adjustment to wait for a function.At last, the present thesis introduced the innovative bed test device, by which the bed test on circuit and software system was performed, as well as analyzed and demonstrated the test result. Analyze the results in experiment, then do some appropriate modify and improvement to the system. Sum up to the research process, and give a conclusion.
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