Jib crane boom margins mainly use (pitching) rotation around the vertical axis with lifting goods, the use of flexible action to meet the loading requirements, in the form of fixed, mobile and floating. Fixed jib crane mounted directly on the dock or pier base library field, can only work in situ. Some of the boom is not only pitching rotation, and some can tilt can be reversed.
2013年12月9日星期一
Crane controller
If compared the behavior of the crane to a single pendulum, then
experienced crane operators can eliminate many payload oscillation
caused slowdown in the process of oscillation, cancel the hoist gantry crane
process of oscillation. However, some types of payloads and rigging
double in these conditions, dynamic so even skilled operation manual
method of eliminating oscillation become very difficult. As a result,
some researchers have suggested increasing feedback control to suppress
the double pendulum is dynamic. The steel crane of using feedback control,
due to the difficult to measure the payload of the bill. Therefore,
this article does not advocate feedback control, but the shape control
command, don't need sensors. Crane controller, is actually the real-time
vibration suppression, it must be produced from human command signal to
filter out unnecessary incentives. Such changes can be generated by
convolution with humans a command signal pulse sequence. Convolution
results, and then used to drive the crane motor. Driving crane.
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