Multi-dimensional State-Space model in Simulink
8 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
As a result from a certain model, I get a 3x3 SS. There are three inputs (Acceleration x, Acceleration y, Acceleration rz) and three outputs (Pressure x, Pressure y, Pressure rz).
However, I only know how to implement one of the 9 (3x3) SS representation (for example acceleration x to pressure x) in the `State-Space' block.I know how to mux and demux the acceleration and pressures.
So my question is: How do I get the 3x3 SS in one `State-Space' block?
0 Kommentare
Antworten (2)
Jonathan Epperl
am 8 Jan. 2014
If you have the state-space description of you 3 x 3 system, why don't you just enter it into the parameters of the state-space block? It accepts matrices for B, C and D, not just vectors. The only obstacles I can imagine is that you might not be able to enter 0 for D, but it would have to be zeros(3,3).
0 Kommentare
Thijs
am 9 Jan. 2014
1 Kommentar
Jonathan Epperl
am 9 Jan. 2014
Makes a little more sense now. It sounds like you need to 'assemble' it all into one system. As a primitive example:
You have a system dxdt = Ax + Bu, y = Cx +Du and another one dqdt = Fq+Gr, s = Hq + Jr.
You can combine them into one system by defining z'=[x q], v'=[u r], w'=[y s] (so just stacking the signals) and A1 = blkdiag(A,F), B1 =blkdiag(B, G) and so on to obtain dzdt = A1*z + B1*v and w = C1*z + D1*w.
At least I think so ;)
I'm not sure whether that's such a great idea though. Before you had 9 A-matrices, 21 x 21 each, so 9*21^2=3,969 elements to be stored. If you stack the states to get a single system, the size of the A-matrix will be 9*21 x 9*21, which are 35,721 elements.
Siehe auch
Kategorien
Mehr zu General Applications finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!