Study On Optimal Design For Missile Control System Based On Uncertainty

In this paper, the BTT missile is taken as the research for optimization design and simulation in control system based on uncertainty. Because the BTT missile control system is a complex system with a very strong nonlinear coupling, classical control methods are difficult to meet the performance requirements of the new missile. The backstepping control design method, which is a powerful design tool in nonlinear control system, is adopted to design the inversion controller of the missile. And based on above, the single objective and multi-objective optimization algorithm are adopted for the optimization design and simulation analysis based on uncertainty control system respectively.Firstly, according to the principle of missile dynamics, a mathematical model of BTT missile is established by some reasonable simplifying assumptions. On this basis, the roll channel control controller of the missile is designed by the backstepping control design method and verified by simulation. Then the remaining two channels were also designed the inversion controller, then take two different sets of control parameters for the three channel co-simulation. Comparing the results, and provide direction for the next step optimization.Then the missile uncertainty sources are analyzed, the missile optimization problem with uncertainty is studied deeply and the missile uncertainty optimization solution is given. To solve the problem of huge amount of calculation, an approach to missile control system robust optimization method based on surrogate models is proposed.Finally, on this basis, the missile optimization simulations were designed based on the nominal data and the uncertainty respectively. The optimization algorithm contains single-objective and multi-objective genetic algorithm. The different optimization results are plugged into the calculation program with uncertainty for several simulations, and the simulation results were analyzed and assessed.The backstepping control design methods used in this paper is a innovative control method developed in the past twenty years and is the most effective design method to solve the nonlinear control problem currently.The simulation results show that single-objective optimization scheme can obtain better robustness, namely to keep control stability of the missile during flight; and multi-objective optimization scheme get a Pareto optimal solution set, which not only meet the performance requirements but also provide a variety of different options.