Choosing Time-Domain Validation Input Signal
For time-domain validation of linearization, use frest.createStep to create a step
signal. Use the step signal as an input to frest.simCompare, which compares the
simulated output of the nonlinear model and the linearized model.The step input helps you assess whether the linear model accurately captures the
dominant time constants as it goes through the step transients.The step input also shows whether you correctly captured the DC gain of the Simulink
model by comparing the final value of the exact linearization simulation with the
frequency response estimation.2 Linearization