Synthesis of Nonlinear Digital Control Systems

This paper presents a new method for the synthesis of nonlinear digital control systems to fulfill an optimum performance criterion. The synthesis procedure is developed by use of the state variable and state transition techniques for the nonlinear digital control system with a ramp input. It is not necessary to assume that the sampling operations are synchronous, performed at constant rate and representable by means of an impulse modulator. The use of a digital computer allows this technique to carry out the design of the optimum system.