Combination of feedback control and spring-damper to reduce the vibration of crane payload

Operating cranes is challenging because payloads can experience large and dangerous oscillations. Anti-sway control of crane payload can be approached by the active methods, such as feedback control, or passive methods. The feedback control uses the feedback measurement of swing vibration to produce the command sent to a motor. The feedback control shows good effectiveness, but conflict with the actions of the human operator is a challenge of this method. The passive method uses the spring-damper to dissipate energy. The passive method does not cause conflict with the human operator but has limited performance. This paper presents the combination of two methods to overcome the disadvantages of each separate one. The passive method is used to improve the efficiency of the feedback method to avoid conflicts with the human operator. The effectiveness of the combination is simulated in a 2D crane model.