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Optimal maneuver guidance with sensor line of sight constraint
The problem of optimal guidance design for the low altitude, subsonic,
vertical plane approach maneuver of an air vehicle constrained to maintain
view of a fixed final position is studied using a nonlinear, constrained,
optimal control problem formulation. Multiple, competing optimization
criteria are included separately as performance goals and in combination as
state equality constraints for design tradeoff analysis. In conjunction
with vehicle flight constraints, a sensor line-of -sight (LOS) angle limit is
imposed as a control variable inequality constraint to provide a sensor
field of regard influence on the guidance design. Numerical results are
provided that illustrate the optimal guidance for different performance
criteria, the sensor LOS profile along the optimal maneuvers, and the
influence of the sensor limit on the guidance law design. A near-optimal,
closed-loop feedback guidance law that incorporates the sensor constraint is
developed based on neighboring extremals.