传递对准中机翼弹性变形建模与滤波处理

针对机翼弹性变形对传递对准的较大影响,提出采用双激光测距方法对不同挂点弹载子惯导系统的机翼弹性变形进行在线量测,利用AR(n)模型来简化ARMA(p,q)模型进行机翼弹性变形的在线建模.建模中采用递推最小二乘法估计模型参数,利用模型估计残差的F检验法确定模型的阶数.最后,根据机翼弹性变形模型并结合快速对准匹配方法设计了考虑多阶有色观测噪声的传递对准滤波器.仿真试验验证了这种机翼弹性变形在线建模方法和考虑有色观测噪声的对准滤波器的可行性和有效性,为机载导弹提供了一种有效的快速精确传递对准方法.

Modeling of wing flexure and filtering solution in transfer alignment

Focusing on the remarkable influence of wing flexure on transfer alignment(TA), a two-laser ranging method was presented to measure the wing flexure of missile-borne strapdown inertial navigation system(SINS) in different hook. An AR(n) model was put forward to simplify the ARMA(p,q) model to perform online modeling of wing flexure. In the modeling process, the recursive least squares algorithm was adopted to estimate the model parameters and F testing method using modeling estimation errors was applied to determine the rank of AR(n) model. Finally, the TA filter embracing multi-rank colored measurement noises was designed according to the online wing flexure model and rapid TA matching plan. Simulation experiments and results validate the feasibility and the validity of the online modeling method of wing flexure and the transfer alignment filter considering colored measurement noises, which provides an effective rapid and accurate TA method.