초록 ▼

This invention concerns a navigation system of the type utilizing proportional navigation guidance laws to guide an aerodynamically controlled body tracking a target, and particularly relates to a navigation system mechanization wherein necessary body-to-target line-of-sight rate-of-change informati

This invention concerns a navigation system of the type utilizing proportional navigation guidance laws to guide an aerodynamically controlled body tracking a target, and particularly relates to a navigation system mechanization wherein necessary body-to-target line-of-sight rate-of-change information with respect to an inertial reference is developed implicitly, in part by using system optics and detector elements that are fixed to the guided body rather than to a body-mounted, inertially stabilized platform, to obtain stabilized guidance system tracking.

대표청구항 ▼

A proportional-type terminal guidance control system for on-board use on an aerodynamically-controlled vehicle for guiding the vehicle toward a target, said target being on a line of sight emanating from the vehicle and displaced angularly relative to the direction of flight of the vehicle, said sys

A proportional-type terminal guidance control system for on-board use on an aerodynamically-controlled vehicle for guiding the vehicle toward a target, said target being on a line of sight emanating from the vehicle and displaced angularly relative to the direction of flight of the vehicle, said system comprising (a) optical detector means adapted to be mounted in fixed relation to a vehicle for viewing a target about a line of sight for producing a detection signal indicative of the signature of the target, (b) tracker means responsive to said detection signal for producing a tracking signal indicative of the angular displacement of said line of sight relative to the vehicle, (c) dithering autopilot means responsive to said tracking signal for producing a control signal for dithering and changing the direction of flight of the vehicle relative to said line of sight according to proportional navigation laws, and (d) servo means receiving said control signal from said autopilot means and f or actuating a control furface that changes the direction of flight of the dithered vehicle relative to said line of sight, said autopilot means including a first feedback loop which employs a vehicle attitude aignal proportional to the dithered flight attitude of the vehicle relative to a reference plane and further including gain control means for combining, said attitude signal with said gain-scaled tracking signal as a gain control signalfor adjusting the gain of said gain-scaled tracking signal, said gain-adjusted tracking signal being further combined into said autopilot means control signal in accordance with laws of proportional navigation to thereby increase the flight path stability of the vehicle.