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Theoretical constraints in the design of multivariable control systemsThe research being performed under NASA Grant NAG1-1361 involves a more clear understanding and definition of the constraints involved in the pole-zero placement or assignment process for multiple input, multiple output systems. Complete state feedback to more than a single controller under conditions of complete controllability and observability is redundant if pole placement alone is the design objective. The additional feedback gains, above and beyond those required for pole placement can be used for eignevalue assignment or zero placement of individual closed loop transfer functions. Because both poles and zeros of individual closed loop transfer functions strongly affect the dynamic response to a pilot command input, the pole-zero placement problem is important. When fewer controllers than degrees of freedom of motion are available, complete design freedom is not possible, the transmission zeros constrain the regions of possible pole-zero placement. The effect of transmission zero constraints on the design possibilities, selection of transmission zeros and the avoidance of producing non-minimum phase transfer functions is the subject of the research being performed under this grant.
Document ID
19930007194
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Rynaski, E. G. (Calspan-State Univ. of New York Joint Venture Buffalo, NY, United States)
Mook, D. Joseph (Calspan-State Univ. of New York Joint Venture Buffalo, NY, United States)
Depena, Juan (Calspan-State Univ. of New York Joint Venture Buffalo, NY, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1991
Subject Category
Computer Programming And Software
Report/Patent Number
NASA-CR-191943
NAS 1.26:191943
Accession Number
93N16383
Funding Number(s)
CONTRACT_GRANT: NAG1-1361
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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