# US 5,353,226 A · Coriolis indicator for situational awareness

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- Number: US 5,353,226 A
- Document ID: US5353226A
- Status: Granted
- Kind: A
- Application number: 07/934,226
- Filed: 1992-08-25
- Granted: 1994-10-04
- Earliest claimed: 1992-08-25
- Assignees: The United States of America as represented by the Secretary of the Air Force
- Inventors: Daniel W. Repperger
- Web page: https://patentgrep.com/patent/US5353226A

## CPC

- G01P 15/18: in two or more dimensions
- B64D 43/00: Arrangements or adaptations of instruments
- B64D 45/00: Aircraft indicators or protectors not otherwise provided for
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

## Abstract

A system for indicating the presence of Coriolis accelerations within an aircraft which might affect pilot perception of aircraft attitude and spatial orientation, which comprises sensors for measuring vehicle angular position, rotations and velocities operatively connected to an onboard computer program which calculates the Coriolis accelerations according to an analysis presented herein and presented on a display to the pilot.

## Claims

### Claim 1

A system for indicating the presence of Coriolis accelerations in a moving vehicle, comprising:
(a) a plurality of sensors for measuring angular displacement and angular velocity of a vehicle in a first coordinate system defining said vehicle relative to a second coordinate system relative to which said vehicle moves, said plurality of sensors including means for providing signals defining the measured angular displacements and angular velocities;
(b) means for analyzing said signals and for determining from said measured angular displacements and angular velocities of said vehicle any Coriolis acceleration acting within said vehicle; and
(c) means for displaying any said Coriolis acceleration acting within said vehicle.

### Claim 2 (depends on 1)

The system of claim 1 wherein said plurality of sensors consist of magnetic position sensors, resolvers, potentiometers or optical encoders for measuring angular displacement relative to said second coordinate system, and consist of digital velocity indicators or tachometers for measurement of angular velocity relative to said second coordinate system.