Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.


Wang
Posts:
4
Registered:
8/13/10


Re: Urgent! A question about the "ltisys" command
Posted:
Feb 1, 2013 8:50 AM


I've happened to find that the matrices A, B, C and D shall be constructed as the following process.
A = A; B = [B1, B2]; C = [C1; C2]; D = [D11, D12; D21, D22] ;
because the SYSTEM matrix is supposed to be
   A(p) B1(p) B2   C1(p) D11(p) D12   C2 D21 D22    where p is scheduling variable.
"Wang " <wmhericsnake@gmail.com> wrote in message <ked000$nbm$1@newscl01ah.mathworks.com>... > As we all know that command "ltisys" normally take 5 parameters to form a SYSTEM matrix which could be used by command "psys" > > However, from the explanation described in LMI Control Toolbox, the matrices A, B, C, D are intended for the plant as > > Edx/dt= A*x(t) + B*u(t) > y(t) = C*(x(t) + D(u(t) > > In the process of building up a gain scheduling LPV controller, the plant is normally described as > > P(.,p) defined as: > x = A(p)*x + B1(p)*w + B2*u > z = C1(p)*x + D11(p)*w + D12*u > y = C2*x + D21*w + D22*u > > In the case, how can form the matrices B, C and D? > > By the way, the deom "misldem.m" which is supposed to provided as a demo is en empty m file in my computer. (it is located in X:\Program Files\MATLAB\R2011b\toolbox\robust\rctobsolete\lmi\ja) . Thus, I cannot get any more detail apart from the simple lines in the Toolbox User Guide. > > I't urget cause I'm building up a controller for wind turbine. > > Greate thanks! > > my email is wmhericsnake@gmail.com


Date

Subject

Author

1/31/13


Wang

2/1/13


Wang


