Active Vibration Control Technique For Vehicle Suspension

In this paper, two free degree model and four free degree model of suspension vibration are respectively established. To make simulation approach the real suspension vibration, with knowledge of random process the signals of road inequalities are produced by computer according to specific power spectral density function instead of road signals stimulating suspension system. Such accurate performance targets are attained and it is showed that superiorities of active control are prominent.In the article, it is emphasized on the generally applied adaptive control, sky-hook control and optimum control integrating with the theory and technique of active vibration control on the base of vibration model of vehicle suspension. Three performance targets: acceleration of vehicle body, dynamic flexibility of suspension and dynamic load of tyre are evaluated. At the same time, not only the advantages of above three methods of control are dissertated, but also their disadvantages for active control are pointed out.TMS320C25 assemble language programs of adaptive LMS algorithm and MLMS algorithm are primarily researched on the experimental platform of two free degree model of suspension. It is showed by results that performance of suspension is improved and comfort is raised largely.