Method and self-contained system for harmonizing equipments on b

Details Method and self-contained system for harmonizing equipments on b Method and self-contained system for harmonizing equipments on b

1992-02-25

1994-06-14

Black, Thomas G.

Boots, shoes, and leggings

364454, 36457102, 33356, G01C 2100

Patent

active

053216318

ABSTRACT:
A method for harmonizing an equipment relative to a vehicle, such as a helicopter, based upon sensing of gravitational and magnetic fields in a number of reference systems. The equipment is installed fixedly on board the vehicle which, relative to a first absolute reference system (RM), has an orientation defined by a second reference system (R2) tied to the vehicle. The equipment is subjected to the earth's gravitational field represented by a gravity vector g oriented along its gradient, as well as to the earth's magnetic field represented by a vector H oriented along its gradient. The orientation of the equipment is defined, relative to the first absolute reference system (RM), by a third reference system (R3). The equipment includes a device for measuring the components of the gravity vector g, fixed to the equipment (2), and the vehicle carries a computer; a memory associated with the computer; an equipment magnetometer, fixed to the vehicle, whose orientation, relative to the first absolute reference system (RM), is referenced by a fourth reference system (R4); and a link connecting the equipment and the equipment magnetometer to the computer and to the memory. The gravitational and magnetic fields are measured when the vehicle is in a number of different orientations, and the equipment is harmonized to the vehicle based thereon.

REFERENCES:
patent: 3803387 (1974-04-01), Lackowski
patent: 4134681 (1979-01-01), Elmer
patent: 4845856 (1989-07-01), Rochette
patent: 4930085 (1990-05-01), Kleinschmidt
patent: 5001647 (1991-03-01), Rapiejko
patent: 5050087 (1991-09-01), Walrath et al.
patent: 5150856 (1992-09-01), Gaide
patent: 5172323 (1992-12-01), Schmidt

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