Inconsistent results when simulating an LC series circuit with SimScape

Question

Andress 2016-11-8

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/311168-inconsistent-results-when-simulating-an-lc-series-circuit-with-simscape

回答： Joel Van Sickel 2023-10-13

Hi everybody,

Here is the setup of the simulation:

.

And here is the parameters of this simulation:

RS = 0; % ohm (internal resistance of voltage source)

RC = 0; % ohm (equivalent series resistance of capacitor)

C = 100e-6; % [F]

L = 680e-6; % [H]

LPC = 0; % [1/ohm] Inductor Parallel Conductance

With automatic solver, all other simulation parameters at their default value, I got this result:

.

With ADAMS solver, all other simulation parameters at their default value, I got this result:

.

You can see the inconsistency of these results.

Theoritically, this should be a resonance circuit, but this is not what I got from the simulations.

Could you please shed some light on this for me?

Thank you.

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Answer 1

Joel Van Sickel 2023-10-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/311168-inconsistent-results-when-simulating-an-lc-series-circuit-with-simscape#answer_1332744

He issue is that the Adams solver is specifially for non-stiff problems and your problem being in simscape is typically a stiff problem and requires a solver that supports DAE's. In this case, you would want to use DAESSC or ODE23t as your solver. The other solvers would be expected to give poor results for an electrical simulation.