892482 A Review of Active Suspension Control for On and Off-Hihgway Vehicles Paul W. Claar II University of Wisconsin Platteville Jerald M. Vogel Iowa State University Truck and Bus Meeting and Exposition Charlotte, North Carolina November 6-9, 1989 Downloaded from SAE International by University of British Columbia, Sunday, August 19, 2018The appearance of the ISSN code at the bottom of this page indicates SAE's consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition, however, that the copier pay a $5.00 par article copy fee through the Copyright Clearance Center, Inc., Operations Center, 27 Congress St., Salem, MA 01970 for copying beyond that permitted by Sections 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for genera! distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Service Department. To obtain quantity reprint rates, permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieva! system or otherwise, without the prior writ¬ tan permission of the publisher. ISSN 0148-7191 Copyright 1989 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Division. Persons wishing to submit papers to be considered for presen­ tation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. Printed in USA Downloaded from SAE International by University of British Columbia, Sunday, August 19, 2018892482 A Review of Active Suspension Control for On and Off-Highway Vehicles Paul W. Claar II University of Wisconsin Platteville Jeraid M. Vogel iowa State University ABSTRACT Applications of active suspension control for both on-highway and off-highway vehicles are reviewed. Suspension design is evaluated in terms of ride vibration exposure and road/terrain handling. Active, semi-active, and slow-active suspension types are described in terms of their performance capabilities. Finally, numerous design concepts and their application to a wide range of ground vehicle types (i.e, truck, automotive, agricultural, and construction) are described. INTRODUCTION A BRIEF INTRODUCTION to the active suspension concept is discussed in the belief that the concept has much to offer on-highway and off- highway vehicle design. It has been recognized that improvement in the dynamics of vehicles has been limited by the design compromise between ride and handling characteristics that are inherent with the conventional spring/shock absorber suspension mechanism. The active suspension system is not a new concept, but it does provide an innovative approach to attenuate vibrations and improve handling and load control. Operator and passenger comfort is a subjective area with which the suspension designers are involved. It is not easy to separate out the discomfort due to whole-body vibration, which is under the control of the suspension designer, from other ergonomic and environmental factors,(e.g. noise, operator controls, etc.) For heavy-duty vehicle systems (i.e., trucks, military, agricultural, and construction), the operator and the load are subjected to