Input linearization of nonlinear systems via pulse width control

Input linearization of a general kind of nonlinear system can be achieved by adding a pulse width (modulated) control block prior to the nonlinear system. Therefore the combined system from the pulse width control input to the nonlinear system output behaves as a linear control system. By this way a complex and cumbersome nonlinear system model can be easily transformed to a much simpler linear control form.