ABSTRACT
So far we have seen how to analyze a real system by identifying state variables, setting up state equations that can include constraints, friction, and all the aspects that set practice apart from theory and write simulation software to try out a variety of control algorithms. We have seen how to apply theory to linear systems to devise feedback that will give chosen response functions. We have met complex exponentials as a shortcut to unscrambling sinusoids and we have seen how to analyze and control systems in terms of discrete time signals and transforms.
