Differntial equations and Initial conditions

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KaMATLAB
KaMATLAB 2021-3-28
评论： KaMATLAB 2021-3-31
1. What are the main considerations for selecting initial conditions for solving dynamics equations using Matlab Simulink. For instance, setting the initial conditions in the continuous state block or integral block?
2. Is it possible to use a mathematcal expression or relation instead of a number as the initial condition in the integral block of Simulink?

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Paul
Paul 2021-3-28
  1. The initial conditions are set to represent the initial conditions of the system to be simulated. What other considerations might there be?
  2. Yes. Any expression can be used that returns a value that is consistent with the requirements for the initial condition of the block in question.
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Paul
Paul 2021-3-30
Let X0 be the vector of initial conditions. One approach would be to compute
X0(1) = ....
X0(2) = ....
i.e., fill in each element X0 with the initial condition cacualtion in the base workspace. Then X0 is the Initial Condition parameter in the Integrator block.

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