传递对准中载舰挠曲变形和杆臂效应一体化建模与仿真

 针对舰载机惯导系统大方位失准角传递对准的非线性问题,根据舰载机在载舰上的实际停放情况,引入舰载机标称坐标系,并综合考虑载舰挠曲变形和杆臂效应的影响,建立挠曲变形和杆臂效应加速度一体化模型,完善舰载机惯导系统大方位失准角传递对准线性化模型。采用“速度+角速度”组合匹配算法的滤波模型,对固定安装失准角和挠曲变形角进行了估计。结果表明,该模型在舰载机大方位失准角传递对准时可以满足对准精度和时间的要求。

Incorporate Modeling and Simulation of Transfer Alignment with Flexure of Carrier and Lever-arm Effect

In order to solve the nonlinear transfer alignment problem for aircraft's inertial navigation system with large misalignment azimuth, an incorporate acceleration error model of lever-arm effect is built with the flexure of a carrier, and according to the actual position of the aircraft on the carrier, a linear error model of transfer alignment for aircraft's inertial navigation system with large misalignment azimuth is built and con-summated by importing nominal aircraft body coordinate. The velocity+angular velocity matching method is used to estimate both the fixed misalignment and the instantaneous dynamic distortion angle. The simulation result shows that this method can estimate the fixed misalignment and the flexure angle effectively, and satisfy the precision requirements.