Hybrid Mode Control in Improvement to Magnetic Suspension Ball and Beam System

概要

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The development of magnetic suspension (MS) technology has been widely applied in high-tech industry. MS actuator has features of contact-free, friction-free, low contamination and low noise. This paper describes the design and examination of the hybrid MS actuator referring to our previous works with different analysis aspect to improve the overall performance of actuator and system. The re-designed MS actuator is analyzed and controlled by deriving its magnetic force and system state equations. This paper uses commercial products for design process and simulations about the stability and robustness of system. After deriving the dynamic equation of ball and beam system, the sliding mode control (SMC) is applied in the balance and stabilize the ball and beam system. The drive circuit and MS actuators are controlled by the microcontroller in ball and beam system. The combined SMC and Fuzzy Logic Control (FLC) are also introduced to control the adjustable stable position. Different situations are tested separately with conformed results to desired responses. Finally, comparison and analyses of the results in laboratory have presented good improvements on the proposed system.