Autonomous kinematic measurement system for helicopters

Details Autonomous kinematic measurement system for helicopters Autonomous kinematic measurement system for helicopters

1988-02-11

1990-11-13

LaRoche, Eugene R.

Boots, shoes, and leggings

73178H, 244 1713, G01C 2110, G05D 100

Patent

active

049706519

ABSTRACT:
An autonomous kinematic measurement system for helicopters is disclosed. A helicopter comprises a lifting rotor, an anti-torque rotor, first means to control the cyclical pitch and the collective pitch of the rotor and second means to control the pitch of the anti-torque rotor. The system comprises means to measure the helicopter's ground speed, means to measure the longitudinal cyclical pitch of the lifting rotor blades, means to measure the lateral cyclical pitch of the lifting rotor blades, means to measure the collective pitch given to the lifting rotor blades, and means to measure the pitch of the anti-torque rotor. An inertial unit, provided with ancillary computing means, uses a direction signal and a helicopter attitude signal corresponding to the longitudinal acceleration signal and lateral acceleration signal of the helicopter's ground speed signal to establish the helicopter's longitudinal and lateral airspeed values, following a determination of the coefficients .alpha.,.beta., establishing, from measurements of the above-mentioned helicopter's mechanical and dynamic parameters, the above-mentioned speed values. The invention can be applied to the determining of the above-mentioned coefficients .alpha. and .beta., to the piloting of military and civilian helicopters and to flight simulation.

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