Hydraulic control system

Details Hydraulic control system Hydraulic control system

1990-07-24

1991-11-05

Look, Edward K.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

91361, 91461, 414699, F16D 3100, B66C 2300

Patent

active

050622641

ABSTRACT:
An articulated arm employs a controller to generate .delta.r, .delta..THETA. and .delta.z signals for controlling the movement of the arm in r, .THETA. and z directions to product movement of an end point from an initial location along a desired path toward a desired location. The actual location is determined by sensing the relationships between the arm segments and determining the actual location of the end point. The actual location is continuously compared with the desired location represented by the r, .THETA. and z signals and, if the difference between the actual location and desired location exceeds preselected limits, the .delta.r, .delta..THETA. and .delta.z are scaled down thereby redefining the desired location to ensure that the actual arm movement does not lag an unacceptable amount relative to the desired location.

REFERENCES:
patent: 4377043 (1983-03-01), Inui et al.
patent: 4773302 (1988-09-01), Mizota et al.
patent: 4826391 (1989-05-01), Lawrence
patent: 4844685 (1989-07-01), Sagaser
patent: 5005466 (1991-04-01), Miyaoka

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