Accession Number : ADD002270

Title :   Drift-Compensated Free-Rotor Gyro.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Broderson, Ralf K

Report Date : 31 Oct 1975

Pagination or Media Count : 23

Abstract : The patent application relates to a fluidic/pneumatic, two-axis, free-rotor gyro in which the free-inertia rotor is gas bearing supported on a spherical portion of a rotatable gas bearing rotor, both rotors being connectable to controllable sources of drive fluid pressure for separate drive and pneumatic pickoff and torquer units, the pickoff units providing control signals representative of the frequency of each rotor. The invention includes a further aspect of comparator control circuits responsive to said control signals for selecting and maintaining the speed of each of the two rotors independently and in a ratio selected to provide (G sup 2) drift compensation. A further aspect of the invention comprises the compensation of case-erection drift by auto-erection drift by specific scaling of the gas-bearing and windage air gap parameters.

Descriptors :   *GYROSCOPES, *GAS BEARINGS, PATENTS, ROTORS, FLUIDIC CONTROL, GAS TURBINES

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE