Active vibration control for marine platform flatness using back-stepping scheme

Issues of vibrations in marine applications have become a major concern for many years. As a result, this paper investigates the flatness control of fitted equipment on marine vessels, which are subjected to disturbances from random sea wave. A back stepping control strategy is proposed to reduce the effect of disturbance simulated as random sea waves on the active marine suspension model. The control employs the liner/nonlinear filter with flexible bandwidth that depends on magnitude of the suspension displacement so as to provide a reduction in the effect of the disturbance. Simulation analysis is carried out to show that the designed controller allows a reduction of the vibration in different operating region. Analysis is compared with a passive response to evaluate the performance of the designed controller.