The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 1996
Filed:
May. 11, 1994
Jerome Sears, Wyckoff, NJ (US);
Walter Parfomak, Wallington, NJ (US);
Walter J Kluss, Kearny, NJ (US);
AlliedSignal Inc., Morris Township, NJ (US);
Abstract
A two degree of freedom gyroscope having a drive motor (20), with a permanent magnet rotor (22), which includes an optical sensor (11) for providing an X-axis signal and a Y-axis signal which are indicative of the displacement of the actual rotor (22) spin axis from the null spin axis (28), a torquer coil (26) looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to the null spin axis, and torquer drive elements (52, 54, 56) responsive to the X-axis and Y-axis signals induced in the sensor when the actual rotor (22) spin axis is displaced form the null spin axis (28) for providing current to said torquer coil (26) to urge the axes to coincide. A voltage induced in an open phase of a two phase motor stator is used to provide the instantaneous position of the rotor poles to obtain correct phasing information for commutation of the single polar torquer.