Digital computer program written in FORTRAN 4 has capability of synthesizing low order compensators to stabilize dynamical system in presence of parameter variations. Design scheme is accomplished by means of sensitivity function which is minimized with respect to eigenvalues

Willner, L.

English

NASA Technical Reports Server

August 1972	 B72-10486 
NASA TECH BRIEF 
Marshall Space Flight Center 
NASA Tech Briefs announce now technology derived from the U.S. space program. They are issued to encourage 
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be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Compensator Design for Low-Sensitivity 
Linear Time-Invariant Systems (COMPDES) 
The problem: 
A method was needed to reduce the trial and error 
procedures now employed in the design of low order 
compensators that stabilize a given dynamical system in 
the presence of parameter variations. 
The solution: 
A digital computer program has been written in 
FORTRAN IV that has the capability of synthesizing 
low order compensators to stabilize these systems. 
How it's done: 
The scheme for the design of the compensators is 
accomplished by means of a sensitivity function which 
is minimized with respect to the eigenvalues. A compen-
sator is considered acceptable if a stability criteria test 
is satisfied. 
In the present form, the program is dimensioned for 
a maximum of sixth order. Machine memory capacity 
will be a limiting factor as to whether or not the 
program can be redimensioned to accommodate larger 
order systems.
Notes: 
1. This program is written in FORTRAN IV for an 
IBM-360 computer. 
2. Inquiries concerning this program should be sub-
mitted to: 
COSMIC 
112 Barrow Hall 
University of Georgia 
Athens, Georgia 30601 
Reference: MFS-21652
Source: Lutz Wiliner of

Rensselaer Polytechnic Institute

under contract to

Marshall Space Flight Center

(MFS-21 652) 
S Category 09 
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Aeronautics and Space Administration. Neither the United States
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Compensator design for low-sensitivity linear time-invariant systems (COMPDES)

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