This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A State Adaptive Control Algorism for Vehicle Suspensions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 01, 1988 by SAE International in United States
Annotation ability available
This paper describes a state adaptive control method for vehicle suspensions proposed by Hitachi, Ltd. The objective of the control is to improve riding comfort and driving stability in reaction to road iregularities, exterior wind forces, and changes in vehicle loads as well as in reaction to inertial changes during cornering, breaking, and accelerating. The objective is attained by making considerable use of the relative displacement data between the body and the suspension. The state adaptive control system includes four shock absorbers whose damping forces can be tuned in three stages, four height sensors which measure the relative displacement, a vehicle speed sensor, and a microcomputer which decides the optimal damper stage. The validity of the proposed control method is shown through computer simulations and actual driving experiments. Vertical acceleration is reduced by about 55 % by switching from the soft damper to the hard damper in a computer simulation.
CitationAdachi, M., Shioya, M., Funabashi, M., and Naito, S., "A State Adaptive Control Algorism for Vehicle Suspensions," SAE Technical Paper 881769, 1988, https://doi.org/10.4271/881769.
- Baker A. “Lotus active suspension,” Automotive Engineer 9 1 56 57 1984