Dynamic balancer for spinning bodies

Details Dynamic balancer for spinning bodies Dynamic balancer for spinning bodies

1975-03-27

1976-11-02

Gill, James J.

Measuring and testing

Rotor unbalance

In situ

73468, 74573R, G01M 136

Patent

active

039889351

ABSTRACT:
A spin-stabilized body having deployable solar panels or appendages is modified by making the deployment mechanism capable of partial retraction and extension from the normal deployed position on an individually commandable bais. The spin axis of a free spinning body is dependent upon the location of the center of gravity within the body rather than by external bearing or support points as with a restrained spinning body. However, mispositioning of the center of gravity of the spacecraft may cause misalignment of the spin axis with respect to the geometric axis, thereby causing dynamic imbalance which is observed as body wobble. Such wobble can be minimized by offsetting the center of gravity of the panels or appendages from the center of gravity of the spacecraft in the axial direction and making the deployment mechanism for the panels or appendages capable of partial retraction and extension in the radial direction on an individually commandable basis.

REFERENCES:
patent: 2441152 (1948-05-01), Kelleher et al.
patent: 3149502 (1964-09-01), Caruso et al.

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