“…Some researchers have presented several methods to attack the issue, i.e., decoupling control [14], passivity-based control [15], wave-based control [16], hierarchical sliding mode control [17,18], input shaping control [12,13,[19][20][21][22][23], neuralnetwork-based intelligent control [24], e ct. The methods can roughly be divided into two categories according to the type of control structure, i.e., feedback control [14][15][16][17][18]24] or feedforward control [12,13,[19][20][21][22][23].…”