Abstract—One challenging control problem is that of modern tactical missile systems in pursuit of achieving large scale of maneuverability and sufficient stability. The optimal autopilot for practical systems should provide the fastest possible performance under constraints on applicable system dynamics. The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with The quadratic performance index with weightings adjustment cannot easily and clearly handle such constraints. This paper introduces an optimal autopilot design technique based on the constrained optimization. The tracking performance is formed analytically as the design objective. The open-loop crossover frequency and the maximum demand of the actuator fin-deflection rate are introduced as analytical inequality constraints. The design process is handled into the space of stable poles parameters of the autopilot closed loop characteristic. The introduced autopilot design is self-consistent technique and is easily fulfilled with an optimization algorithm. Numerical simulation results are illustrated to demonstrate the effectiveness and feasibility of the proposed approach.

Index Terms—three loop autopilot, optimal gain design, crossover frequency constraint, control effort constraint

Cite: Mohamed A. Abd-Elatif and Qian Longjun, "Optimal Design for Three-loop Autopilot Using Multi-Constraint Optimization," Jounal of Automation and Control Engineering, Vol. 5, No. 1, pp. 31-38, June, 2017. doi: 10.18178/joace.5.1.31-38