Abstract
A preview control that acts in accordance with the road surface profile in front of the vehicle has been proposed as a way to enhance ride comfort. Although the effectiveness of this control has been verified, many issues remain to be resolved, including improving the road surface profile estimation accuracy while the vehicle is in motion. Consequently, as a way of enhancing the comfort of the vehicle and reducing energy consumption, this development aimed to construct preview ride comfort control logic capable of estimating road surface displacement more accurately. To improve estimation accuracy, this paper proposes a method of estimating the road surface displacement in front of the vehicle using preview sensors and the body displacement estimated using a full-order observer. It describes sky-hook control logic that performs feed-forward of control amounts proportionally to the lateral road surface displacement. The ride comfort performance in the roll direction and the energy-saving effect of this control was verified using a 4-wheel shaker and in actual driving tests. It was confirmed that the developed control estimates road surface displacement more accurately than the previous control, thereby improving ride comfort at low-frequencies and reducing energy consumption. The result is a more feasible preview control system that has made progress toward the aim of practical application.
F2012-G02-005
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Sugai, H., Buma, S., Kanda, R., Yoshioka, K., Hasegawa, M. (2013). Preview Ride Comfort Control for Electric Active Suspension. In: Proceedings of the FISITA 2012 World Automotive Congress. Lecture Notes in Electrical Engineering, vol 198. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33795-6_13
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DOI: https://doi.org/10.1007/978-3-642-33795-6_13
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