Inverse dynamics application for MR seat damper vibration control

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Inverse dynamics application for MR seat damper vibration control

Sapinski, B. / Pilat, A.

Modern structures of driver (operator) seats tend to incorporate both mechanical suspension systems and vibration damping elements. The objective of these activities is first of all vibration isolation of the driver. In order to achieve such isolation, the spring characteristics of seat suspension should be adjusted to the character of expected vibrations by introducing vibration isolation system. The task of the vibration isolator is to reduce vibrations transferred to the driver's body as such vibrations may cause discomfort and different kinds of illnesses. This paper deals with experimental investigations of semi-active control system with MR damper assigned for seat suspension. By using vibration responses of open-loop system under kinematic excitations inputted with respect to control current intensity, a controller that employs inverse dynamics model of the system has been developed. The vibration control performance of the semi-active suspension system has been shown to be very effective by realizing neural controller. The experimental results have shown that the performance of the neural controller depends on learning series used for the neural network training. Therefore they should be selected very carefully due information losses. The effectiveness of the proposed and experimentally examined MR seat damper control has been shown by presenting reduced vertical acceleration level at the driver's seat and by comparison to the performance of usually used ON-OFF controller.