Desenvolvimento de sistemas de aumento de estabilidade e controle para modelos de simulação de uma aeronave de asa rotativa

Abstract

This work presents a Stability and Control Augmentation System (SCAS) design and a flight simulator test using a six rigid-body degrees of freedom (DoFs) helicopter linear model. This control systems are intended to emulate different handling quality ratings (HQR) and stability characteristics. The structure was first proposed to be a proportional diagonal controller with static output feedback similar the one presented in [Hoh 2003]. The control design techniques used was successive loop closure and the linear quadratic re- gulator (LQR) demonstrated in [Stevens e Lewis 2013]. Firstly, were made a theory review on helicopter flight dynamics and stability and an analysis on the adopted linear model. To obtain the desired handling qualities, it was used the poles placement restraints on dumping and frequency requirements shown at ADS-33E-PRF. After the system design, the handling qualities was evaluated in a real-time flight simulator at Instituto de Pesqui- sas e Ensaios em Voo (IPEV) by two pilots. Beyond the proportional feedback system, others control’s and system’s configurations were tested, as: ACAH (Attitude Control Attitude Hold), using of wash-out filter, mixer and compensators. The implementation effect of actuators in the system’s plant and Linear Matrices Inequalities (LMI) controller design to obtain state and output feedback were also analyzed.