针对一种新型柔索传动差动结构稳定平台结构设计问题, 开展平台载荷分析和框架结构强度以及稳定性校核研究。根据平台的实际工况和载荷特点, 将载荷划分为惯性载荷、质心偏移加速度载荷、摩擦载荷和环境载荷, 分类计算并进行载荷综合和功率估算; 以回转架结构为例进行结构静动态校核, 根据载荷分析结果, 对框架结构进行有限元分析, 校核结果显示回转架具有良好的静动态特性: 平台框架调转及随载体机动过程中的变形在系统允许的范围之内, 满足设计要求; 框架结构一阶固有频率为156.04 Hz, 远高于伺服系统工作带宽, 不会引起谐振, 具有较高的结构动态稳定性。

Aiming at the structural design of a new type inertially stabilized platform based on cable differential transmission, the load analysis, frame structure strength and stability checking were studied. According to the load characteristics and working conditions of the platform, the load was divided into inertial load, centroid-offset acceleration load, friction load and environmental load, and then calculated respectively to conduct load synthesis and power estimation. The static and dynamic structural verification was carried out with the azimuth frame taken as an example. The finite element analysis based on the result of load analysis shows that the frame has good static and dynamic characteristics: the deformation during load transferring and frame overload with the carrier are within the allowable range of the system, which meets the design requirements; the first-order inherent frequency of frame structure is 156.04 Hz, much higher than the bandwidth of the servo system. Accordingly the resonance can be avoided and the frame shows high structural dynamic stability.