This paper presents the performance evaluation of an adaptive magnetorheological isolation (AMI) system for ground support equipment (GSE) in mobile launch platforms through analytical simulation. A semi-active AMI system using a pair of coil springs and MR dampers on each corner of the GSE was theoretically configured and its governing equations of motion were formulated based on nonlinear coil spring and MR damper models. For improving the vibration isolation performance, decentralized semi-active controls such as Skyhook control, sliding mode control, and simplified Skyhook control were applied to the AMI system. Under representative transient launch excitations, maximum accelerations and maximum displacements in three translational directions of the GSE on the semi-active AMI systems were compared with those on the passive AMI system. In addition, performance robustness of the semi-active AMI systems to variations in the GSE mass and the center of gravity location was theoretically evaluated. Shock response spectra of the GSE on the semiactive AMI systems were also generated to evaluate the damage potential of the GSE due to representative transient launch excitations.
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