Gliding Extended Range Guided Munition Control System Design And Analysis

Gliding extended-range guided projectile is a new guided ammunition with high efficiency of extended-range, which is mainly used for remote precision strike. It is now reckoned as the most promising ultra-remote ammunition from some aspects such as the extended-range rate, state of technology, cost effective and so on. Through study on its trajectory characteristics and control law, it will be greatly helpful to effectively increase the gliding range and precision-guided.The work in this dissertation is mainly the design and analysis of trajectory characteristics and control system.The primary characters of gliding extended-range guided projectile were summarized and its mathematical model was established. Based on the mathematical model, the program trajectory was designed via numerical calculation. Through simulation calculation and compare, the parameters for the ascending process got reasonable selection, and the design of program projectile for gliding control was fulfilled by maximum lift-drag ratio method. Through model searching method, the longest program trajectory was achieved, and according to requirement a program trajectory for attacking 73000 target was realized and analysed.Theory of a nonlinear circular tracking algorithm was detailed described. Based on this tracking algorithm, the analysis of tracking beeline and curving program trajectory with it was carried on respectively. The nonlinear tracking algorithm was also adopted to track the program trajectory of gliding extended-range guided projectile in the vertical plane.Based on the vertical disturbance transfer function of gliding extended-range guided projectile, the stability and dynamic performance analysis in the time and frequency domain were respectively progressed. Through transfer function and classical PID control law, the vertical altitude control system was designed and simulation was realized through Simulink and S-Function.The definition and characteristics of structured singular were introduced, and also the robust performance and D-K iteration algorithm.The form of upper LFT was adopted to describe the uncertainty model in the vertical plane for gliding extended-range guided projectile. A feature point was selected for the nominal reference projectile model. On the basis of structured singular valueμand D-K iteration algorithm, theμsynthesis controller got calculated and under the designed controller the robust stability and performance of the closed-loop system was also analyzed. What's more, the response analysis of tracking the given input signal by this controller was completed. Under the help of Simulink and S-Function, both of the continuous and discrete system simulation for the nonlinear, time-varying closed-loop model were designed, and combination of the nonlinear tracking algorithm, the six degrees of freedom trajectory simulation for gliding extended-range guided projectile was completed. From the simulation results, it can be got than the projectile has a super-romote flight range which is 73km and has a 35m bias, which means that it has a high guide precise.