无人机雷达天线稳定平台的优化设计研究

Optimal for radar antenna stabilized platform of a unmanned aerial vehicle

雷达天线稳定平台用于隔离载体的角运动以提高探测精度。针对传统雷达稳定平台应用于无人机时重量较大,对无人机造成较大的负重载荷,同时由于转动惯量大而影响工作灵敏度的问题,对三轴稳定平台的四大主要组件在无人机不同飞行工况时的载荷情况进行了研究,根据力学原理分别建立了数学模型,采用Matlab求解了组件受到最大载荷时的飞行工况,从而确定了组件的极限载荷,以得到的该极限载荷作为有限元优化设计的边界条件。以确保稳定平台工作的强度、刚度为前提,以重量为目标,对各组件进行了优化求解,最终确定了雷达稳定平台的优化设计参数。研究结果表明,通过对无人机三轴雷达稳定平台的优化设计,平台重量得到显著降低,工作灵敏度得到了提高。通过优化设计的稳定平台已在无人机型号产品上进行了应用。

Radar antenna stabilized platform is used for segregating the angular motion of carriers in order to improve the detection accuracy.Aiming at the higher load of unmanned aerial vehicle（ UAV） caused form the heavy traditional stabilized platform,as well as the sensitivity was affected by the bigger rotary inertia when applied to UAV,the loading situations of the three axis stabilized platform＇s four major components in different flight conditions of UAV were researched. According to the mechanics principle and the Matlab software,the mathematical model was established and the work conditions of components under maximum load were solved,thus the limit load for components was elaborated,which was treated as the boundary conditions of finite element optimization design. Under stiffness and intensity satisfied,the radar stabilized platform was optimized,aiming for minimum weight. The results indicate that the weight of stabilized platform has been reduced remarkably,and the sensitivity has been improved through the optimized design for the three-axis stabilized platform. The platform through optimized design has been used in a sort of UAV.