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AssigneeResearch Foundation of the City University of New York
InventorsGerard G. Lowen, Stephen J. Tricamo
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This invention provides a technique for reducing shaking forces in n-bar type planar linkages. Thus a linkage is reciprocated and the shaking forces determined in two different coordinates of the plane of operation. With information on crank arms, operating position and velocity of the reciprocating linkage, the relationship F.sub.s =Ma furnishes balancing equations which may be solved by calculation using detected readings at a plurality of linkage positions to give the masses and positions of corrective balancing members for reducing the shaking forces. Instrumentation primarily comprises a force platform such as a piezoelectric device upon which the linkage is mounted for cyclic reciprocation to produce dynamic force signals along a set of two coordinates in the plane of operation at various linkage positions. Appropriate data processing equipment then calculates from the balancing equations the corrective masses and their positions for reducing the shaking forces. The calculation can be automatically done in computing equipment, and the shaking forces along the coordinates can be displayed on an oscilloscope for analysis and indication of the balance.
The method of fully force balancing cyclically moving planar n-bar linkages to reduce residual shaking forces comprising the steps of,
Apparatus for dynamic analysis of the shaking forces of cylically moving planar linkages, comprising in combination, means for moving the linkages over a cyclic movement pattern, detection means for determining cyclic shaking forces in the plane of the linkage at a plurality of points in the movement pattern, and computation means for determining from the shaking forces and the movement pattern characteristics of balancing masses to modify the linkage mass for reducing the shaking forces of fundamental and harmonic frequencies of the cyclic frequency.
The method of analysis of the shaking forces in linkages with all components reciprocating in a plane, comprising the steps of,
The method of determining corrective masses and mass positions for reducing shaking forces in linkages with all components reciprocating in a plane, comprising the steps of,
Apparatus for dynamic analysis of the shaking forces of planar linkages, comprising in combination,
Dependencies are inferred from the claim text.