Characteristic Model Based All-Coefficient Adaptive Control of a High-Speed Desorption Pump Supported by AMBs

Active magnetic beatings (AMBs) have been increasingly adopted in industries that involve high-speed rotating machinery and feedback control design is one of the essential problems in AMB systems. In this paper, we report on the development of the characteristic model based all-coefficient adaptive control (ACAC) method to a high- speed desorption pump supported by AMBs. This control method does not require the actual system model and is able to deliver strong performance and robustness, as validated in many successful engineering applications. The desorption pump studied in this paper is designed to operate at a speed of 60,000 rpm, which indicates that a potentially large unbalance force might be introduced to drive the AMB system into instability. Meanwhile, the rising speed range is wider than typical machines so that the natural modes can split more significantly due to the gyroscopic effect, which will introduce strong uncertainties. Therefore, a successful controller must guarantee the closed-loop stability and minimize the vibration during the speed increase as well as at the operational speed. The simulation results have demonstrated the proposed ACAC method is capable of achieving the control requirements and the controller will be implemented on the test rig for experimental validations.