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A modified approach to controller partitioningThe idea of computing a decentralized control law for the integrated flight/propulsion control of an aircraft by partitioning a given centralized controller is investigated. An existing controller partitioning methodology is described, and a modified approach is proposed with the objective of simplifying the associated controller approximation problem. Under the existing approach, the decentralized control structure is a variable in the partitioning process; by contrast, the modified approach assumes that the structure is fixed a priori. Hence, the centralized controller design may take the decentralized control structure into account. Specifically, the centralized controller may be designed to include all the same inputs and outputs as the decentralized controller; then, the two controllers may be compared directly, simplifying the partitioning process considerably. Following the modified approach, a centralized controller is designed for an example aircraft mode. The design includes all the inputs and outputs to be used in a specified decentralized control structure. However, it is shown that the resulting centralized controller is not well suited for approximation by a decentralized controller of the given structure. The results indicate that it is not practical in general to cast the controller partitioning problem as a direct controller approximation problem.
Document ID
19930018862
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Garg, Sanjay (NASA Lewis Research Center Cleveland, OH, United States)
Veillette, Robert J. (Akron Univ. OH., United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1993
Subject Category
Cybernetics
Report/Patent Number
E-7861
NAS 1.15:106167
NASA-TM-106167
Accession Number
93N28051
Funding Number(s)
PROJECT: RTOP 505-62-50
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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