基于PQ法的惯性/光机复合指向控制方法

为了进一步提升机动平台的遥感侦查能力,在惯性稳定平台的基础上,结合光电探测信息通路中的快速反射镜,构成惯性/光机复合指向系统,借助快返镜的快速运动补偿惯性稳定回路的伺服误差,可有效提高探测光轴的稳定精度与指向跟踪的机动性能。将惯性稳定回路与快反镜控制回路转化为平行的双入单出系统,针对两者作用频带与作动范围的差异,提出一种惯性/光机复合指向控制方法,解决系统中惯性稳定机架指向与快反镜指向叠加的稳定性匹配和频带分解问题,从而提升光轴的稳定精度和机动性能。仿真结果表明:加入了快反镜的惯性稳定平台的误差有显著减小,其跟踪误差量从0.018减小到0.005以内,验证了控制器设计的有效性。

Inertial/optomechanical combined pointing control technique based on PQ method

The remote sensing investigation ability of a mobile platform is promoted by setting a fast steering mirror which to reduce the servo error of inertially stabilized loop in the access of optical detection, then the platform's pointing precision, track velocity and stabilized accuracy of line-of-sight will be improved effectively. A inertially stabilized gimbal and fast steering mirror were transformed into a parallel Dual-Input Single-Output(DISO) system. Based on the difference of actuator range and frequency between inertially stabilized gimbal and fast steering mirror, a combined control method was presented, which was used to assure the auxiliary pointing stability, and then the pointing precision and track velocity can be improved through this method. A simulation experiment was carried out to verify the effectiveness of the method which reduce the servo error of inertially stabilized platform from 0.018 to under 0.005 by putting in a fast steering mirror.