Filter
Top Products
240 Chapter 6. Function Reference
The primary use of this routine is the fitting of D scale weights for mu synthesis
iterations.
Chebyshev polynomials are used as basis functions for both the numerator and
denominator polynomials.
WARNING: This routine uses iterative polynomial calculations which are not well
conditioned for high order (> 6) fits.
Reference
For further information see: “Curve Fitter for Pole-Zero Analysis,” J.L. Adcock,
Hewlett-Packard Journal, p. 33, January 1987.
Example
# Set up a plant to generated data for the fitting
# problem.
plant = makepoly([0.1,-0.1,1],"s")*makepoly([1,1],"s")...
/(makepoly([1,0.1,.1],"s")*(makepoly([0.2,1],"s")))
# Note that plant has right half plane zeros
rifd(plant)
Poles:
real imaginary frequency damping
(rad/sec) ratio
-5.0000e-02 3.1225e-01 3.1623e-01 0.1581
-5.0000e-02 -3.1225e-01 3.1623e-01 0.1581
-5.0000e+00 0.0000e+00 5.0000e+00 1.0000
Zeros: