Summary: IASTED Conf. on Modeling, Identification and Control, February 14-17, 2000, Innsbuck, Austria 296
NYQUIST STABILITY TEST FOR A PARABOLIC PARTIAL
Dept. of Mathematical Sciences, Twente University,
P.O.Box 217, 7500 AE Enschede, The Netherlands,
The paper describes a Nyquist stability test applied to a
parabolic partial differential equation. The PDE describes
the temperature distribution of composite structures with
linear inner heat source. The distributed transfer functions
have been developed by the transmission matrix method.
To analyze the stability of the system we define a virtual
feedback-loop and apply the Nyquist stability test. The
method described is easy to use and avoids numerical
problems arising from locating the infinite number of
system poles by numerical approximation.
Keywords: Nyquist stability test, distributed parameter
systems, partial differential equations.