摘要
测漂对准是惯导系统实现精确对准的主要途径。本文提出了一种新的测漂对准方案，它能有效地缩短测漂对准的时间。方案的特点在于对准和陀螺测漂工作在平台旋转过程中进行。数字仿真结果表明：仅用双位置对准中旋转平台的时间，便能达到与双位置对准同样的精度。
Chinese aircraft navigation now needs to improve platform inertial navigation system intwo respects: improvement of alignment accuracy and reduction of alignment time. For thispurpose, we propose a new scheme in this paper.One key concept employed in the new scheme is the introduction of a torque op applied toazimuth gyro that can change the azimuth of the inertial platform. This can increase the abservabilty of the alignment system of the inertial platform. Another key concept is that gyrodrift measurement and platform alignment can be simultaneously and optimally performedwhile the azimuth of the platform is continuously changed. This is important for the reduction of alignment time.Simulation results are given in Figs. 2 through 5. It can be seen from Figs. 3 and 4 thatour new scheme appears quite promising for improving platform alignment accuracy and forreducing alignment time. Its alignment accuracy is much higher than that obtainable with1-position alignment. Though its alignment accuracy is about the same as compared with2-position alignment, the alignment time is much less. Frequently 2-position alignment isunusable because of too much alignment time. With our new scheme, such alignment accuracy can be attained without paying the price of too much alignment time.The system state Eq. (7) is the key mathematical equation. It differs from existing onesin that it is time varying.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1995年第3期432-436,共5页
Journal of Northwestern Polytechnical University
