Method and apparatus for controlling swing stop of upper swing b

Details Method and apparatus for controlling swing stop of upper swing b Method and apparatus for controlling swing stop of upper swing b

1991-10-16

1993-12-28

Look, Edward K.

Power plants

Pressure fluid source and motor

Methods of operation

60466, 60468, 91459, F16D 3100

Patent

active

052728773

ABSTRACT:
Herein described is a method and apparatus for controlling braking and stopping of the slewing of an upper slewing body which is slewingably provided on a construction and hoists a load, represented by a rotary crane, wherein the braking torque for braking the upper slewing body and the braking torque for braking a hoisting load are separately obtained by the calculated slewing angular acceleration, and the whole braking torque is calculated on the basis of both the braking torques, thereby achieving a high accurate control of the slewing stop.

REFERENCES:
patent: 3921818 (1975-11-01), Yamagishi
patent: 4367806 (1983-01-01), Ramquist
patent: 4520625 (1985-06-01), Sato et al.
patent: 5062266 (1991-11-01), Yoshimatsu
patent: 5063742 (1991-11-01), Yoshimatsu
patent: 5111658 (1992-05-01), Strenzke et al.
patent: 5136928 (1992-08-01), Hachisu

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