A Type Of Missile Terminal Guidance Law Design And Guidance Accuracy Analysis Of Strapdown

To realize the low cost and high precision of general weapons, the methods such as adding simple guidance equipment or end amended equipment have been often used to design general weapon flat of cannonball, mortar cannonball, aircraft bomb, rocket missile, etc. and nowadays, these have become the main ways of weapon development in the world. As the new concept way of effectually reducing the cost and improving reliability of weapon systems, the strapdown homing guidance technology has been paid attention to and developed very quickly in the west since 1960s. Under this background, with direct utilizing the information of strapdown Anti-Radiation homing seeker, the paper presents a practicable strapdown guidance approach based on classical guidance laws for solving the difficult problem of receiving the inertial space angle rate of line-sight. And it has shown that the method has the excellent performance by simulations and this work is valuable for designing the Anti-Radiation homing System in engineering.The methods of theory analyses and digital simulation have been used in this thesis and several schemes of strapdown guidance law based on analyzing the performance of several classical guidance laws have also been present according to the characteristics of strapdown Anti-Radiation homing seeker. The stapdown guidance systems were built for a certain Anti-Radiation missile, adopting acceleration autopilot and the attitude autopilot, and the paper has focus on analyzing the performance of low frequency strapdown Anti-Radiation homing seeker. The Approaches of lead correction and dead-zone relay control were given to improve the guidance precision, and also the increasable observability law was attempt and validate. In the paper, several primary facts affecting guidance precision are analyzed and the reasonable height of control system beginning to work and the standard of explorer are given. Finally, the robust capability of the strapdown guidance system is examined and the result shows an excellent adaptability performance.It has been proved by simulations that the nonlinear strapdown guidance law has good performance, low cost and high precision. So this research work is valuable for the engineering design of strapdown Anti-Radiation homing System.