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Gyrometer application for a low-frequency active suspension

1993; Elsevier BV; Volume: 37-38; Linguagem: Inglês

10.1016/0924-4247(93)80022-9

1873-3069

Jean-Pierre Colinot, Vincent Hernette, Ph. Jarri,

Geophysics and Sensor Technology

We first define the general concept of active suspension and how it differs from a passive one (springs and shock absorbers). This device necessitates measurements of absolute and relative quantities such as position, acceleration and velocity to perform a control strategy. Then we derive our concept of a low-frequency active suspension, which is a restricted development. This step allows us to exhibit the required information (wheel-body velocity and position). The wheel-body position results from construction, hence only one problem remains to be solved. We discuss advantages and drawbacks of different kinds of sensors (accelerometers, gyrometers, longitudinal velocity meters or position sensors) satisfying the requirements. We point out that gyrometers are the best available sensors for our application. We briefly describe the gyrometer (principle, performance) we use in this case. We describe our experiments (environmental conditions, choice of relevant parameters for assessment, vehicle implementation and data-acquisition system). We discuss the results obtained with on-board steady-state testing. We assess the improvement achieved by such an active suspension compared with a standard one. Both vehicles used are of the same type (Citroën BX). We conclude by discussing the limitations of this system and the improvements needed to design an automotive product.