SINS快速精确传递对准技术研究

Study on the Rapid and Accurate Transfer Alignment for SINS

针对空间机动平台武器捷联惯性导航系统(SINS)快速精确动基座传递对准问题,采用适于空间武器SINS动基座姿态传递对准的数学模型,提出将预测滤波方法应用于空间机动平台武器SINS的传递对准中。该方法能够在线估计并修正系统模型,提高状态估计的精度,并克服了将模型误差假设为高斯白噪声的局限性,同时也降低了系统状态变量的维数,减小了计算量。仿真结果表明,该方法的收敛速度和滤波精度都明显优于标准Kal-man滤波,有效地提高了空间机动平台武器SINS动基座传递对准的精度和速度。

Aim at the problem of rapid and accurate transfer alignment for space maneuver platform weapon strapdown inertial navigation system （SINS） on moving base, the model of transfer alignment scheme using attitude matching method was established for space weapon, and a method of predictive filter （PF） was used in the transfer alignment for space weapon. In this method, the model error is assumed unknown and estimated as part of the solution; the model error is not limited to Gaussian noise characteristics, and the algorithm can be implemented on-line to both filter noisy measurements and estimate state trajectories. The results of simulation show that this method has better precision and convergence than that of KF. Furthermore, it decreases the computation time by reducing the number of states, satisfied the requirements of precision and speed which is emphasized in transfer alignment for space weapon.