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Trajectory optimization - Wikipedia, the free encyclopedia Wikipedia (2007) - wikipedia2007.classicistranieri.com

Trajectory optimization

From Wikipedia, the free encyclopedia

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Trajectory optimization is the process of designing a trajectory that minimizes or maximizes some measure of performance.

The selection of flight profiles that yield the greatest performance plays a substantial role in the preliminary design of flight vehicles, since the use of ad-hoc profile or control policies to evaluate competing configurations may inappropriately penalize the performance of one configuration over another. Thus, to guarantee the selection of the best vehicle design, it is important to optimize the profile and control policy for each configuration early in the design process.

Consider this example. For tactical missiles, the flight profiles are determined by the thrust and load factor (lift) histories. These histories can be controlled by a number of means including such techniques as using an angle of attack command history or an altitude/downrange schedule that missile must follow. Each combination of missile design factors, desired missile performance, and system constraints results in a new set of optimal control parameters.

The techniques available to solve optimization problems fall into two broad categories: the optimal control methodology that allows solution by either analytical or numerical procedures and an approximation to the optimal-control problem through the use of nonlinear programming that allows solution by numerical procedures.

Retrieved from "http://en.wikipedia.org../../../t/r/a/Trajectory_optimization.html"
STATIC WIKIPEDIA JUNE 2008 on wikipedia2006.classicistranieri.com

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