H-infinity robust control of 3-DOF helicopter

This paper proposes a robust control technique for a 3-DOF helicopter. The control algorithm uses a robust controllers synthesized by the H infinity loop shaping approach. The simulation results show that the robust controllers stabilize the system and reject the disturbances. The evaluate and the comparative studies between the classical controllers (PI, PD, PID) and the robust H infinity loop shaping controller are given with simulations results in presence of the noise disturbance in the closed loop control of the elevation, pitch and rotation.