This model is the same as OpenLoopSimulator, except that it starts directly from a steady state. This requires the solution of a system of nonlinear equations, which might lead to some numerical problems. If the solver is successful, the first relaxation transient of OpenLoopSimulator, which has no physical meaning, is avoided.

At time t = 100 s, the water valve is closed by 10%. At time t = 200 s, the gas flow rate is increased by 10%.

The simulator is provided with external inputs to apply changes to the system input. If the system is simulated alone, these are taken to be zero by default, so the step responses can be computed. If the system is linearized at t = 0, the A,B,C,D matrices of the linearized model around the steady state can be obtained.


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