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A parameter optimization approach to controller partitioning for integrated flight/propulsion control application

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3 Author(s)
Schmidt, P.H. ; Dept. of Math. Sci., Akron Univ., OH, USA ; Garg, Sanjay ; Holowecky, B.R.

A parameter optimization framework is presented to solve the problem of partitioning a centralized controller into a decentralized hierarchical structure suitable for integrated flight/propulsion control implementation. The controller partitioning problem is discussed and a cost function to be minimized is formulated, such that the resulting optimal partitioned subsystem controllers closely match the performance (including robustness) properties of the closed-loop system with the centralized controller while maintaining the desired controller partitioning structure. The cost function is written in terms of parameters in a state-space representation of the partitioned subcontrollers. Analytical expressions are obtained for the gradient of this cost function with respect to parameters and an optimization algorithm is developed using modern computer-aided control design and analysis software. The capabilities of the algorithm are demonstrated by application to partitioned integrated flight/propulsion control design for a modern fighter aircraft in the short approach to landing task. The partitioning optimization leads to reduced-order subcontrollers that match the closed-loop command tracking and decoupling performance achieved by a high-order centralized controller

Published in:

Control Systems Technology, IEEE Transactions on  (Volume:1 ,  Issue: 1 )

Date of Publication:

Mar 1993

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