Alqg Controller Design For An AMB-Flexible Rotor System

Because active magnetic bearing (AMB) has many particular virtues, it might be the best way to support the motor rotor and gas turbine rotor in the 10MW high temperature gas-cooled test module reactor (HTR-10). The two rotors are designed to pass through the first two bending critical speed (BCS) to reach the working point. In this paper, firstly, aiming at the small experiment setup, more accurate mathematic model of AMB flexible rotor system than the rigid one heretofore is formulated with subsection discrete method (SDM). Then some valuable results, such as, eigen-frequencies changing with supporting stiffness, eigen-shapes and gyroscopic effect, etc., are drawn in figures. Finally, a controller with linear quadratic Gaussian (LQG) control synthesis adding some phase compensators is designed after some simulations. In actual experiments, the rotor could not only run up to 340 Hz, above the first BCS, but also stay at that speed stably and safely for a long time.