Add nonlinear system compatibility to time simulation functions #906

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1. murrayrm

   added this to the 0.10.0 milestone on Jun 7, 2023
2. murrayrm commented on Jun 8, 2023

   

   murrayrm

   on Jun 8, 2023

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   From #905:

   As we move into 0.10 (see #904), I think we can do the following:

   • Allow initial_response and step_response to work for either linear or nonlinear systems.
   • Allow forced_response to take a nonzero X0 as an optional argument, but perhaps document it as mainly being there for the "pure" forced response, which at least one textbook defines as corresponding to X0=0 (FBS, page 6-3).
   • Use input_output_response as the general function for simulating a linear or nonlinear system for a specified input and initial condition (suggestions welcome for a better name).
   • Allow impulse_response only for linear systems (mainly because I think it is mainly useful for educational purposes when teaching linear control theory, convolution, etc).
3. murrayrm

   linked a pull request that will close this issueI/O system class restructuring #916on Jun 19, 2023
4. murrayrm

   closed this as completedin #916on Jul 2, 2023