کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Design of a Multiple-Model Adaptive PID Autopilot for a Surface-to-Surface Missile's Pitch Channel With Stability Guarantees

نویسندگان :

Salar Rezaeizadeh¹ Firouz Allahverdizadeh² Vahid Behnamgol³

1- دانشگاه مالک اشتر تهران 2- دانشگاه مالک اشتر تهران 3- دانشگاه مالک اشتر تهران

کلمات کلیدی :

Adaptive Control،Pitch Channel،BTT Missile،PID Controller،WMMAC

چکیده :

This paper presents the design of a multi–model adaptive PID autopilot for the pitch channel of a bank–to–turn (BTT) surface-to-surface missile operating over a wide flight envelope . The missile model exhibits strong nonlinearities and significant parameter variations due to changes in Mach number, angle of attack, and mass properties during flight . To ensure robust performance, the flight envelope is partitioned into several regions, and a locally linearized model is obtained for each operating point . A dedicated PID controller is then designed for each region . To avoid the adverse transients and excessive control effort caused by abrupt switching between controllers, a Weighted Multiple-Model Adaptive Control (WMMAC) strategy is employed, enabling smooth blending of the local controllers based on real-time tracking errors . Simulation results demonstrate that the proposed approach achieves substantial reductions in overshoot, oscillations, and control energy compared with instantaneous switching, while maintaining accurate reference tracking even under noisy measurement conditions . Stability of the closed-loop system is verified through eigenvalue-based linear analysis and through the convex combination properties of the adaptive control scheme .