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.

DFP（Disturbance-Free Payload，DFP）航天器是一种由支撑模块（SM）和有效载荷模块（PM）组成的新型航天器架构，可为敏感有效载荷提供超安静的振动环境，但在实际应用中，使用柔性电缆用于电源和数据传输，导致从支撑模块到有效载荷模块的额外振动传输路径。针对柔性电缆降低有效载荷模块指向性能的问题，建立了由柔性电缆静态和动态分量组成的非线性模型，并采用基于差分正交的时间积分方法进行求解。对支撑模块单独施加脉冲扰动，分析了软缆的动态传输特性。