Modeling and Micro-vibration Control of Flexible Cable for Disturbance-Free Payload Spacecraft

摘要

Disturbance-Free Payload (DFP) spacecraft is a novel spacecraft architecture consisting of the support module(SM) and the payload module(PM), which can provide an ultra-quiet vibration environment for sensitive payloads, but in practical applications, flexible cables used for the power supply and data transmission resulting in an additional vibration transmission path from the support module to the payload module. To address the problem that the flexible cable degrades the pointing performance of the payload module, one nonlinear model consisting of static and dynamic components of the flexible cable is established, and solved by a method of the differential quadrature based time integration. Separately applied the impulse disturbance to the support module, the dynamic transmission characteristics of flexible cable are analyzed. To suppress the micro-vibration caused by the flexible cable, a disturbance feedforward control compensation based on the established exact model is proposed, and the effectiveness of the disturbance feedforward compensation method is verified by numerical simulation.