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From: Pavlos on 27 Jun 2010 10:46
Hello,
I have been trying quite a long to run the function 'pdsimul', which can simulate affine parameter models over time. Firstly, I have created through the use of function 'psys', an affine parameter dependent model. In particular, I have typedQ

>> p = pvec('box', [1 3; 2 5])
p =
1 1 3 0 0
2 2 5 0 0

>> affsys = psys(p, [S0, S1, S2]);

where S0, S1, S2 are system matrices.

The syntax of the 'pdsimul' function is the following:

[T,X,Y] = PDSIMUL(PDS,'TRAJ',TF,'UT',XI,OPTIONS)

where (I copied - pasted the matlab help text)

Input:
PDS affine parameter-dependent system (see PSYS)
'TRAJ' name of the function p=TRAJ(t) specifying the
parameter trajectory. This function takes a time
t and returns a value p of the parameter vector.
TF final time for the integration (initial=0)
'UT' name of the input function u=UT(t). The default
is a step input.
XI initial state of the system (Default = 0)
OPTIONS control parameters for the ODE integration
(see ODESET)

Output:
T integration time points
X state trajectories (X(:,1) = first state, etc.)
Y output trajectories (Y(:,1) = first output, etc)

the only thing that I have managed to do correctly is defining the pds parameter. The parameters TF, 'UT', XI and OPTIONS can be omitted. I am only interested in creating a running example of this function. The major problem I have encountered so far, is that I cannot define the 'TRAJ' parameter.

If someone could help me on that, or just provide me a simple working example, I would be obliged.

Thank you in advance for your precious help.
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