Servo amplification system

Details Servo amplification system Servo amplification system

1981-12-04

1983-07-19

Butler, Douglas C.

Material or article handling

Article manipulator moves analogous with human hand, finger,...

Electric or fluid motor drive for manipulator

414694, 414699, B25J 300

Patent

active

043941028

ABSTRACT:
A servo amplification system is created particularly for heavy construction equipment, but has a general utility that is much broader. The system utilizes a hydraulic analog system with a separate subsystem for each dimension of motion. The operator moves the operative element, such as the backhoe bucket, of the analog replica which ordinarily would be situated in the cab of the backhoe or other piece of equipment. A small hydraulic cylinder operative in response to movement at each articulated connection of the backhoe operates a pilot valve which controls a pilot piston mechanically linked to the drive valve of the drive cylinder of the corresponding articulation in the actual backhoe. A feedback system comprising a mechanical link from the actual drive piston to a feedback cylinder and piston delivers hydraulic fluid back to the inlets of the pilot valve in such a way as to cancel the pilot orders from the initial control cylinder. The resulting action is virtually perfect analog simulation by the actual backhoe of the movements of the replica backhoe.

REFERENCES:
patent: 4059196 (1977-11-01), Uchino et al.

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