pol2des

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 = G1.num

See also

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