Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Missile or spacecraft guidance
Patent
1994-04-26
2000-05-16
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Missile or spacecraft guidance
244 314, 244 319, 701 1, 701 4, G01C 1372, F41G 736
Patent
active
060643323
ABSTRACT:
Two new homing guidance laws, designated as proportional Guidance (PROGUIDE) and Augmented Proportional Guidance (Augmented PROGUIDE), have been developed for use against non-maneuvering and maneuvering targets, respectively. These guidance laws are the solutions of linear-quadratic regulator control problems and minimize deviations from the collision triangle over the entire period of homing flight, thereby indirectly minimizing miss distance. In contrast to proportional navigation (PRONAV), these algorithms command the achievement of angular acceleration instead of linear acceleration and there is a significant advantage in doing so. The guidance laws (1) are more compatible with the seeker measurements which are angular in nature, (2) do not require an estimate of time-to-go, (3) can be used to directly drive the skid-to-turn or bank-to-turn logic that produces autopilot input commands, (4) avoid actuator saturation through the real-time adjustment of a single parameter in each channel, and (5) are less sensitive to random errors. Thus these guidance laws are not only effective in and of themselves, but also provide a simple framework within which an integrated guidance and control design can be carried out. The integrated design accounts for interactions between the target state estimator, the guidance law, and the autopilot during the design process.
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Franz Bernard E.
Kundert Thomas L.
Sotomayor John B.
The United States of America as represented by the Secretary of
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