System for active compensation of unwanted relative movements, p

Details System for active compensation of unwanted relative movements, p System for active compensation of unwanted relative movements, p

1978-01-27

1980-08-05

Noland, Kenneth W.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

414137, 91390, 254392, B66D 148

Patent

active

042158516

ABSTRACT:
A system for active compensation of undesired relative movement particularly during loading of cargo comprising a long-periodic acting system for compensation of static loading caused by the load and a short-periodic acting system for active compensation of undesired relative movement of the load relative to a reference value. The long-periodic system includes a compensating cylinder provided with two pistons acting in opposite directions, the cylinder being connected to one or more pressure loaded reservoirs operating pneumatically. The short-periodic system includes at least one hydraulic cylinder and the position of the short-periodic system is determined by measurement of acceleration of the end of the loading crane beam by accelerometers.

REFERENCES:
patent: 3309065 (1967-03-01), Prud'Hommo et al.
patent: 3511476 (1970-05-01), Horton
patent: 3624783 (1971-11-01), Chang
patent: 3807277 (1974-04-01), La Spisa et al.
patent: 3871622 (1975-03-01), Lanralde et al.
patent: 3912227 (1975-10-01), Meeker et al.

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