Modeling and designing levitation, roll and pitch controller for high accuracy maglev tray system

Maglev (magnetic levitation) system has been introduced as one of innovative technologies that transportation is able to move without contacting on the ground so that it has immensely beneficial in eliminating friction and generating high speed. Having some advantages of generating less friction and dusts in maglev technology, we design a high accuracy maglev tray system to carry organic light-emitting diode (OLED) display. To carry OLED display in a stable condition, it is necessary to control precisely the levitation state. In our paper, a multi-degree of freedom model for a high precision maglev tray system analyzed to consider the stability and robustness of levitation performance. This model is then used to design a cascade control strategy and a combined optimal state-feedback controller-observer compensator for the heave, roll and pitch motion of maglev tray system. The proposed controllers demonstrate the excellent levitation performance under comparative simulations such as a large load disturbance and sensor installation error.