Abstract
In this paper, an optimal control design method based on the use of preview look-ahead information about the road surface input has been shown to offer substantial performance benefits for active and semi-active suspension systems. A twin accumulator semi-active suspension system is studied theoretically using a quarter car model. The linear optimal control theory is used to derive the full state feed-forward control laws taking into account the correlation excitation with the look-ahead sensor information about the ground input. This paper suggests a solution for eliminating discomfort by using a twin accumulator semi-active suspension system, which involves modifications to the twin-accumulator suspension system and conventional passive suspension system without neither excessive cost or complexity. Moreover, the paper provides a theoretical evaluation for using a twin accumulator semi-active suspension system with and without preview control suggested, and compares the results obtained to those given by the twin accumulator system and the passive suspension system. As a result, active and twin accumulator semi-active suspension systems with and without preview give worthwhile improvements when compared to the passive suspension system and twin accumulator suspension system based on the quarter car model.
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