Research On The Analysis And Compensation Of Error About Transfer Alignment On Moving Base

With the development of modern warfare, moving base transfer alignment of inertial navigation has become a key technology, the precision and alignment time will determine the accuracy of airborne navigation and missile launch response time. To improve the alignment accuracy, to reduce the aimed time, is the core issue to study the transfer alignment of the moving base. On the other hand, fighter is often contained in a dynamic statement, a slight change of environment will make the system introduces a large errors, which will seriously affect the missile's precision strike capability. To eliminate errors caused by this effect, this article do some research from the following aspects.First, this article describes the basics of the initial alignment of strapdown inertial navigation system, and starting with the parameter descriptions and navigation cootdinate system. Described the characteristics of the initial alignment, and detailed analysis of the inertial errors, derived the mechanical layout formula of the inertial navigation system. According to the size of misalignment angle after rough align, respectively build a linear model and nonlinear model.Second, introduce two matching methods and three maneuvers. Use of singular value observability analysis method based PWCS theory to analyze the system, obtained the linear roll motion under the"velocity and attitude"matching is the most suitable requirements of this article. On this basis, four kinds of filtering methods were proposed, namely linear Kalman filter, Unscented Kalman filter, adaptive Kalman filter and improvement of the adaptive Kalman filter continuous correction feedbank control. The last method is the innovation of this article, which is proposed based on two methods simulation results complementary.Third, this article focuses on the model and error compensation method about the lever arm effect, flexure and time delay. On this basis, the three kinds of error added to the system at the same time, then proposed three methods of compensation, respectively, the feedback control, adaptive Kalman filter method and improvement of the adaptive Kalman filter continuous correction feedbank control method. Through simulation, the last method is the best.Finally, introduce the design and development of the transfer alignment simulation system, provide a simulation platform.This paper provides a theoretical basis and technical support for aircraft transfer alignment, which has important theoretical significance and practical value.