Patent ID: 11926509
Assignee: TADANO LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A crane comprising:
a boom that is supported on a pair of lower bases and is configured to turn, raise, and elongate/contract;
one or more motors and/or cylinders that drives the boom;
one or more sensors that detects information about an attitude of the boom;
one or more processors comprising:
a target signal generation unit that generates a target signal regarding a moving direction and a moving speed of a suspended load based on information about an operation input for instructing the moving direction and the moving speed of the suspended load;
a filter unit that generates a filtering target signal by filtering the target signal;
a control signal generation unit that generates a speed control signal for controlling an operation speed of the driving device based on the information about the attitude and the filtering target signal; and
a control unit that controls the one or more motors and/or cylinders based on the speed control signal,
wherein the filter unit generates a notch filter based on a combined frequency of a resonance frequency regarding a wire rope suspended from the boom and a natural vibration frequency excited when the boom vibrates due to an external force.