| 摘要 |
<p>The disclosed embodiment of the present invention is a device for use in aircraft flight simulators which computes, as a function of time, ground range from the aircraft's nadir to an object in front of the aircraft, when given the aircraft's altitude and the slant range to the object. The relationship between ground range, altitude and slant range is essentially a right triangular and can be expressed mathematically by he P ythagorean Theorem. The mathematical expression for the right triangle is differentiated with respect to time and rearranged into an integral equation for solution of the ground range variable. Integrating and dividing circuitry is provided for implementation of the integral equation. Also, compensation and switching circuitry is provided for initialization of the integrators.</p> |
