| 摘要 |
<p>PURPOSE:To enable a search over a constantly fixed distance range, by estimating the flight altitude of a projectile, and calculating an optimal oscillating angle for search according to the altitude so as to maintain a necessary guide distance, from the ratio of the estimated flight altitude to a preset necessary guide distance and the attitude angle of the projectile. CONSTITUTION:A static air pressure sensor 3 attached to a projectile so as to estimate altitude, a rate gyroscope for measuring the rate of change in attitude angle of a craft, a circuit 5 for setting an initial value of the attitude angle, a dividing circuit 6 for calculating the ratio of the estimated altitude data to a preset guide distance, an integrating circuit for estimating the attitude angle from an output from the rate gyroscope 4, a function generating circuit 9 for outputting an oscillating angle command in an inertial coordinate system on the basis of an output from the dividing circuit 6, and a subtracting circuit 11 for calculating an oscillating angle command in a craft-axial system from the estimated attitude angle 8 and the oscillating angle command 10 in the inertial coordinate system, are provided. It is thereby possible to perform a search over a fixed distance, regardless of the flight altitude of the projectile.</p> |
