gsignal (version 0.3-7)

polystab: Stabilize polynomial

Description

Stabilize the polynomial transfer function by replacing all roots outside the unit circle with their reflection inside the unit circle.

Usage

polystab(a)

Value

Vector of stabilized polynomial coefficients.

Arguments

a

vector of polynomial coefficients, normally in the z-domain

Author

Paul Kienzle, .
Conversion to R by Geert van Boxtel,

Examples

unstable <- c(-0.5, 1)
zplane(unstable, 1)
stable <- polystab(unstable)
zplane(stable, 1)