Design and control of a self-adjusting outdoor landscape wall

Abstract

AbstractThis paper designs an outdoor landscape wall, which is equipped with an electrical motor, a sunlight intensity sensor and a rain sensor. The plants in the landscape wall will be rotated indoors when the weather is bad. To the contrary, based on signals from the sunlight intensity sensor, the plants can be rotated outdoors to get suitable sunlight. The dynamics of the electrical motor current control loop is much higher than the requirement of the position control loop. The whole control system can be divided into two subsystems: out-loop position control system and inner-loop current control system. An adaptive control strategy is proposed for out-loop position control. A nonlinear controller based on feedback linearization is developed for inner-loop current control. The two subsystems are synthesized with a first-order filter. Simulations are conducted to verify the proposed control strategy. The simulation results demonstrate that high-performance position tracking can be achieved under parameter uncertainty and disturbance.