Common Assembly hoist crane

Bridge crane assembly is a very common means of transport, in ports, warehouses , construction sites and other places have been widely used. However at runtime overhead crane , trolley load swing caused by the games , which would reduce the efficiency of oscillating the one hand, the crane system , and on the other hand may cause the load of the operator or other steel crane objects caused by injury or collision loss. Therefore, many scholars overhead crane system controls a lot of research work : ask the car quickly and accurately reach the target position , on the other hand also requires the ability to effectively suppress the swinging of the load. The most common method of controlling open loop overhead crane shaping the input (Input Shaping), but this method requires high precision of the system parameters , and thus more hoist gantry crane to solve the closed-loop control and suppress the swing carriage positioning problems. Chang et fuzzy logic main bridge crane in a position to meet the accuracy requirements of the swing angle suppression . Fang Yong, et al pure energy -based control method , by increasing the dynamic coupling between the trolley and the load characteristics to achieve good control of the cable car system ; several advanced nonlinear control methods which are applied to the overhead crane system .