Research Of DSP-based Intelligent Measurement And Control System For Automotive MR Semi-active Suspension

Recent years, magneto-rheological (MR) technologyremains to be the competingresearch focus on the field of automotive semi-active suspension. In order to promoteautomotive MR semi-active suspension heading for intelligentization and industrializ-ation, a substantial number of researches have been carried out to the key technologyofelectronic control system of MR semi-active suspension in the domestic and overseas. Afew of institutions have conducted experiment researches on the real vehicle road test,while most attempts remain in the laboratory simulation or bench test due to thecondition limitations. Furthermore, the commercial applications of MR suspension,which are configured as the optional features in high-end vehicle models, are extremelyrare, as a result of the high cost of entire electronic control system and the high energyconsumption. Now therefore, research and development of the MR semi-activesuspension electronic control system with effective control, low energy consumption,low cost, and stable and reliable operation have important academic and practicalsignificance.Based on the analysis of the existing automotive MR semi-active suspensionelectronic control systems, the general aims of this thesis are proposed. Aiming atproviding a reliable and efficient platform to verify the various control algorithms, theresearch goal of this paper is to develop a DSP-based intelligent measurement andcontrol system for the MR semi-active suspension, which is expected to achieveminiaturization design, convenient operation, working reliability as well as low powerconsumption.On the basis to meet the above design requirements, the system alsoconsist of so cheap component instead of high-cost ones that the cost can reach a lowlevel, which will lay a solid foundation for the promotion of MR semi-active suspensionin the medium-and low-end domestic cars.In this paper, the integral system hardware is designed with DSP TMS320F28335as the core of the intelligent measurement and control system. Shyhook controlalgorithm is adopted and realized by software programming, in order to verify whetherthis set of intelligent measurement and control system achieves the desired design goal.Moreover, this paper also presents the embedded code automatic generation methodbased on the model, which provides a feasible and efficient solution to achieve MRsemi-active suspension control algorithm. At last, the studied intelligent measurement and control system is integrated into adomestic car by means of design modification. Then, according to the test standard ofnational vehicle ride comfort, the real vehicle road test is carried out and evaluated. Onthe analysis of all the results, the designed intelligent measurement and control systemfor MR semi-active suspension achieves the desired goal with favorable operationalstatus. On the acceleration root mean square value of the shyhook control algorithmrunning on the intelligent measurement and control platform is able to suppress thevertical vibration of vehicle body significantly, which can effectively improve vehicleride comfort.