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tf2des

tf2des — transfer function to descriptor

Calling sequence

S=tf2des(G)  
S=tf2des(G,flag)

Parameters

G : linear system (syslin list) with possibly polynomial D matrix
flag : character string "withD"
S : list

Description

Transfer function to descriptor form: S=list('d',A,B,C,D,E)



  E*xdot = A*x+B*u
  y = C*x + D*u

Note that D=0 if the optional parameter flag="withD" is not given. Otherwise a maximal rank D matrix is returned in the fifth entry of the list S

Examples



s=poly(0,'s');
G=[1/(s-1),s;1,2/s^3];
S1=tf2des(G);des2tf(S1)
S2=tf2des(G,"withD");des2tf(S2)

See also

pol2des, tf2ss, ss2des, des2tf
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