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A Multiple-Model Approach to Payload Compensation Via Active Suspension Control
Published April 19, 2004 by University of Salerno in Italy
This paper presents an active suspension controller to compensate for vehicle payload changes and proposes a strategy to develop robustness to such changes. The aim of such a controller is to establish safe and consistent vehicle performance over a wide range of payloads. Such payload variations are common in heavy machinery and design is geared toward this application. However, similar effects occur to a lesser degree in passenger vehicles, especially light trucks. A half vehicle model is developed, and loading is simulated by increasing the mass and moving the center of gravity accordingly. A multiple-model approach is used in which models and controllers are developed for various points in the payload range and then blended into a single global controller. The multiple-model controller provides nearly constant vehicle performance and demonstrates significantly lower actuator demand across the range of payloads than a controller designed around a nominal payload.