“…In order to overcome the influence of the external disturbance, various closed loop methods are proposed, which can be divided into adaptive control [6][7][8], fuzzy logic-based control [9,10], genetic algorithms (GA) [11,12], feedback linearization control [13,14], linear quadratic regulator (LQR) control [15][16][17], proportional-integral-differential (PID) control [18][19][20], etc. In [21], Zhang and He considered the crane velocity, the position error, and the swing angle totally in a linearized manner, and an adaptive sliding mode controller is designed.…”