Descriptor State space in Simulink

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Thijs
Thijs 2014-4-9
回答： Fu Zhang 2019-3-27
I have a simple Simulink model, looking like the following:
I want the sum (at the right) to be equal to zero, so I have the following equation:
Input*ss1 + Input*K*ss2 = 0
Input * (ss1 + K*ss2) = 0
ss1 + K*ss2 = 0
K = -inv(ss2)*ss1
Both ss1 and ss2 are linear state space with one input, and one input. However, when calculating K, I get a descriptor state space (a,b,c,d AND e), which I cannot (or do not know how to) enter in Simulink. When running the simulink model without the 'K.e', it does not add up to zero.
Can someone tell me how to calculate K, so I don't get the descriptor SS? Or how to use the descriptor SS in Simulink?
Regards,
Thijs
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Thijs
Thijs 2014-4-15
Is there noone that can help me on this one?

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采纳的回答

Arkadiy Turevskiy
Arkadiy Turevskiy 2014-4-28
You can implement descriptor state space systems in Simulink using LTI System block from Control System Toolbox.

更多回答（1 个）

Fu Zhang
Fu Zhang 2019-3-27
In 2018b, Simulink introduced descriptor state space block, which is a built-in block that support sparse parameter. Details can be found here : https://www.mathworks.com/help/simulink/slref/descriptorstatespace.html

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