面向GMTI任务的系绳式InSAR系统展开研究

研究了短绳系式合成孔径雷达干涉技术（InSAR）系统面向地面动目标检测（GMTI）任务时的展开问题。使用系统的三维动力学模型，首先分析系统在平衡位置附近的稳定性，确定系统执行GMTI任务时面临的问题。结合GMTI任务需求确定系统短系绳情况时的展开方式，使用粒子群算法对系统初始分离速度和方向进行优选，使系统在展开结束时恰好摆动到水平方向。在展开完成后对系统施加阻尼控制和喷气控制，使系统长期处于水平方向附近，以获取期望顺轨基线，最后通过数值仿真验证。结果表明：考虑展开机构静摩擦力时，在优选的初始状态下无控展开，系统能够到达目标位置，且在稳定控制下能够长期保持顺轨基线大于99.6 m。

Deployment research of tethered InSAR system for GMTI missions

The deployment of tethered interferometric synthetic aperture radar (InSAR) system applied for ground moving target indication (GMTI) missions is researched in the paper. To ascertain the characteristic of deployment, the three-dimensional dynamics model is applied, and the steady state analysis is presented. According to the system feature, the free deployment method is chosen to avoid halt caused by the output error of control mechanism. As a result, the deployment is sensitive to the initial state of system. Hence, particle swarm algorithm is used to optimize the initial state to deploy the system along horizontal direction when the deployment fulfills. Then a passive damper and jets control are used to make the system stay near horizontal direction in long-term. Finally, the numerical simulation is executed to verify the optimized initial state and the steady control method. The results show that the system could deploy to the target position with the optimized initial state, and the along-track baseline of system is always bigger than 99.6 m with the stable control.