机载卫星双星天线馈源运动学分析与ADAMA仿真

Kinematics Analysis and ADAMS Simulation of Airborne Satellite Dual-satellite Antenna Feed

针对机载卫星通信双星天线馈源运动学逆解问题,根据其结构与特点提出其运动学求解方法。首先,建立了双星天线馈源在空间坐标系OXYZ中位置坐标与双星天线俯仰轴、方位轴之间的数学模型,根据几何关系得到了天线馈源的正运动学解,同时运用逆变换方法将天线馈源的三维坐标转换为俯仰轴和方位轴的角度,并利用Matlab对运动学分析进行数值计算;最后,利用ADAMS对该天线简化模型进行运动仿真分析,将所得的馈源运动轨迹曲线与数值计算所得结果进行比较。

Aiming at the inverse kinematics problem of the binary satellite antenna for airborne satellite communications,a kinematics solution method is proposed according to its structure and characteristics.Firstly,the mathematical model of the binary satellite antenna’s position coordinate in the space coordinate system OXYZ and the pitch axis and azimuth axis of the dual-satellite antenna are established.Based on the geometric relationship,the positive kinematics solution of the antenna feed is obtained.Meanwhile,the three-dimensional coordinates of the antenna feed are converted into the angles of the pitch axis and the azimuth axis by the inverse transformation method,and the kinematics analysis is numerically calculated using Matlab.Finally,the ADAMS is used to perform the motion simulation analysis on the simplified model of the antenna,and the resulting feed motion trajectory curve is compared with the numerical calculation results.The results show that the numerical calculation is consistent with the ADAMS simulation calculation result,and the correctness of the solution method is proved,then lays a foundation for the trajectory planning and obstacle avoidance algorithm of binary star antenna.