“…These methods include PI/PID control, [8][9][10][11] H-infinity control, 12 sliding mode control, [13][14][15] predictive controller, 16 active force control, 17 genetic algorithm, 18 control the robot end-effector movement by using Lyapunov-based feedback controllers 19 and variable gain by using super-twisting algorithm. 20 There also exist a passive control methods which tried to smooth the liquid's sloshing without direct measurements of the sloshing state such as intermittent air-bubble injection method, 21 inverse dynamic control technique by generating a computer model to estimate the modes of oscillation of the liquid in the container system, 22 guidance, navigation, and control (GNC) algorithm commands thruster firings to counter the fluid slosh forces 21 and a shallow-depth sloshing absorber. 23 Apart from the above reviewed control methods, it is noticed that the solutions for the problem of the liquid slosh produced by many researches had been suffered from the following problems:…”