H∞ control of a novel low-cost roll-plane active hydraulically interconnected suspension: An experimental investigation of roll control under ground excitation

Authors

Sangzhi Zhu, University of Technology Sydney
Lifu Wang, University of Technology Sydney
Nong Zhang, University of Technology Sydney
Haiping Du, University of WollongongFollow

RIS ID

90747

Publication Details

S. Zhu, L. Wang, N. Zhang & H. Du, "H∞ control of a novel low-cost roll-plane active hydraulically interconnected suspension: An experimental investigation of roll control under ground excitation," SAE International Journal of Passenger Cars: Electronic and Electrical Systems, vol. 6, (2) pp. 882-893, 2013. .

Abstract

In order to make the active suspension more affordable, a novel low-cost active hydraulically interconnected suspension is developed, assembled and tested onto a sport utility vehicle. H∞ roll control strategy is employed to control vehicle body's roll motion. The hydraulic suspension model used for deriving the H∞ controller is estimated experimentally from the testing data. The active suspension model is then combined with the half-car model through their mechanical-hydraulic interface in the cylinders. The weighting function design of the H∞ control is provided. On a 4-post-test rig, the active suspension with H∞ control is validated with several road excitations. The test rig and experimental setup are explained and the obtained results are compared. The effectiveness of the designed H∞ controller is verified by the test data, with a considerable roll angle reduction in the three tests presented.