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Scilab help >> Polynomials > pol2des

pol2des

polynomial matrix to descriptor form

Calling Sequence

[N,B,C]=pol2des(Ds)

Arguments

Ds

polynomial matrix

N, B, C

three real matrices

Description

Given the polynomial matrix Ds=D_0 +D_1 s +D_2 s^2 +... +D_k s^k, pol2des returns three matrices N, B, C, with N nilpotent such that:

Ds = C (s*N-eye())^-1 B

Examples

s=poly(0,'s');
G=[1,s;1+s^2,3*s^3];[N,B,C]=pol2des(G);
G1=clean(C*inv(s*N-eye())*B),G2=numer(G1)

See Also

  • ss2des — (polynomial) state-space to descriptor form
  • tf2des — transfer function to descriptor

Authors

F.D.;

<< pdiv Polynomials pol2str >>

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Last updated:
Wed Oct 05 12:09:56 CEST 2011