大失准角传递对准杆臂效应影响研究

The Lever-arm Error Effect Research in Transfer Alignment Model with Large Initial Misalignment Angles

从舰船舰载机惯导系统传递对准实际需要出发,针对刚性舰船载体分析杆臂效应对子惯导系统速度、加速度(比力)影响,在大角度失准角情形下引入标称失准角和计算失准角概念构建传递对准速度姿态匹配非线性误差模型,对系统误差模型展开状态参数估计研究,通过比较研究杆臂矢量对子惯导系统失准角估计误差及其对准精度的影响以及不同初始杆臂矢量对标称失准角估计误差及其精度影响情况,验证本模型在舰船舰载机惯导系统海上对准有效性及其对准精度.

Proceeding from actual technological needs of the inertial navigation system＇ s initial alignment technology of warship shipboards, specific to rigidity shipboards, this paper analyzed the affect expressions of Lever-arm effect of transfer alignment process in strap-down inertial navigation system＇ s velocity and accelera- tion （eeificforce） with the effect of lever-arm error vector, and in the situation of large initial misalignment an- gles, and with the conceptions of the nominal misalignment angle and calculated angle developed the velocity and attitudes matching transfer alignment model algorithm with large misalignment attitudes of SINS＇ other than traditional models, and carried out the system states and parameters estimation performance research. The simulated results indicate that the model algorithm performance, with comparison studying inhering lever-arm vector error＇ s influence on SINS misalignment attitudes＇ estimation error and its alignment accuracy, and with different initial lever-arm vectors their effects on misalignment attitudes＇ estimation error and its accuracy, and verified the model algorithm＇ s validity and its superior alignment accuracy, and the research results are of great theory and application value in design of SINS.