Method of controlling horizontal motion of a load application po

Details Method of controlling horizontal motion of a load application po Method of controlling horizontal motion of a load application po

1983-04-05

1984-03-06

Blix, Trygve M.

Material or article handling

Horizontally swinging load support

Swinging about pivot

414786, 414 4, 414140, 212190, 212223, 212270, 212247, B66C 2300, B66C 2352

Patent

active

044351186

ABSTRACT:
A method and apparatus for controlling the horizontal motion of a double articulated crane comprises determining the angle about a common axis between a base member pivotally mounted on a crane post and a head member carrying a load application point on an outer end thereof. The angle can vary from 0.degree. to 360.degree.. A desired movement direction value is then set on a direction selector movable on a direction indicator. The value corresponds to a target position for the load application point. The desired movement direction value is adjusted by small increments to reach the target however. The desired movement direction value is broken up into two components, one aligned with the axis of the head and the other aligned with a perpendicular axis. The values of these two compartments are calculated as a function of the sin or cos of an angle of misalignment between the longitudinal axis and the direction of the selector. The pivotal speed of the base member about the crane post and the head member about the common axis between the base and the head members is then calculated and utilized to drive the equipment for rotating the members.

REFERENCES:
patent: 2420867 (1947-05-01), Crosby
patent: 3240360 (1966-03-01), Richards
patent: 3828943 (1974-08-01), Simon
patent: 3845289 (1974-10-01), Taguchi et al.
patent: 3963135 (1976-06-01), Coeurderoy
patent: 4303368 (1981-12-01), Dent et al.
patent: 4311031 (1982-01-01), Schwerze
patent: 4352627 (1982-10-01), Schneider et al.
patent: 4392776 (1983-07-01), Shum

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