Synchronization motion control for quad-cylinder lift systems with acceleration coupling

High-performance robust synchronization motion control for quad-cylinder electro-hydraulic lift systems with parametric uncertainties and uncertain nonlinearities is considered. Adaptive Fuzzy logic systems are introduced as an approximator to counteract the effects of coupling among acceleration terms. Robust adaptive control by backstepping is used to handle parametric uncertainties and uncertain nonlinearities in quad-cylinder synchronization lift systems. In order to address the problem of “explosion of terms” caused by using backstepping techniques, “dynamic surface control” techniques are introduced. Simulation results on a quad-cylinder synchronization lift system verified the effectiveness of the proposed approach.