Vehicle guidance system using angular rate of change

Details Vehicle guidance system using angular rate of change Vehicle guidance system using angular rate of change

1972-08-28

1976-10-05

Pendegrass, Verlin R.

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

F01B 1502

Patent

active

039840689

ABSTRACT:
In a vehicle guidance system, a method for computing the true rate of change of the angle between the line of sight to the target and the gyro reference. Two antennas are spaced apart a distance upon the vehicle. The outputs of both antennas are converted to a subcarrier frequency. One of the antenna outputs is then converted to a linear voltage by means of a phase detector and, subsequently, combined with the gyro reference voltage. By means of a high gain control loop and a voltage control oscillator, a combined sinusoid signal is given with both the carrier frequency and the gyro reference. In the high gain control loop, appropriate scaling factors and frequency division and multiplication must be used to eliminate repeating values of phase in excess of 360.degree.. Now, by modulating the combined signal with the signal received from the other antenna, the carrier frequency can be eliminated. By further differentiation and multiplication, and the combining of the results thereof, a true rate of change of the angle between the gyro reference and the line of sight to the target can be obtained.

REFERENCES:
patent: 2992423 (1961-07-01), Floyd et al.
patent: 3181813 (1965-05-01), Gulick et al.
patent: 3215368 (1965-11-01), Follin et al.
patent: 3223357 (1965-12-01), Bruecker-Steinkuhl
patent: 3260478 (1966-07-01), Welti
patent: 3415465 (1968-12-01), Bedford
patent: 3567163 (1971-03-01), Kepp et al.
patent: 3660648 (1972-05-01), Kuipers
patent: 3706429 (1972-12-01), Welford

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