Abstract

In a pervious paper we proposed a new system for an active control hydro-pneumatic suspension which is composed of high speed on/off solenoid valves, instead of a proportional valve or servovalve systems commonly seen in conventional use. And the practicality of the proposed system has been confirmed. The choice of on/off valves driven in the digital mode, such as the pulse width modtilation method, provides the system economy and reliability. In this study, a preview control method is applied to the hydraulic active suspension in order to improve its damping performance. The dynamic characteristics of the system using the preview control in conjunction with a sky-hook control are investigated using experiment and simulation. These results are compared with those obtained, from a conventional sky-hook control, and the availability of the control method is confirmed.

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