Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Parameter-dependent surface-to-air missile autopilot design
Submission Author:
Yuri Marchetti Tavares , SP
Co-Authors:
Yuri Marchetti Tavares, Jacques Waldmann
Presenter: Yuri Marchetti Tavares
doi://10.26678/ABCM.COBEM2021.COB2021-1829
Abstract
High performance missiles impose a challenge to autopilot design with guaranteed high performance and robustness over a large range of operational conditions that affect flight dynamics. Classic gain-scheduling designs have been successful in practice but do not provide theoretically guaranteed characteristics. We propose here a gain-scheduled parameter-dependent autopilot based on four-block loop-shaping H∞ control. The missile design model is described as a polytopic linear parameter varying (LPV) system that depends on time-varying parameters, which we assume are measured in real-time. The dynamic output feedback controller is based on H∞ optimization. For loop-shaping, we propose weights with matched parameter dependency as the LPV plant model to equalize the singular-values’ frequency response and attain feasible LMI solution at each polytope vertex. The proposed method is tested with nonlinear 6-degree-of-freedom simulations of a surface-to-air missile (SAM) against an airborne target that resulted in an average miss distance less than 4 m for the simulated scenarios with successful impact rating above 97%.
Keywords
Autopilot, LPV, H∞ Control, missile, loop-shaping
