Type-z0g3 controller of output tracking for fractional power system

Because most systems are nonlinear in practical applications, output tracking for nonlinear system is of great interest to engineers and scientists. As a specific class of nonlinear system, fractional power system arises in many problems, yet little progress is made on this topic. Inspired by Zhang et al., this paper presents a simple but powerful method of controller design, i.e., generating the controller via gradient dynamics (GD), yielding a type-z0g3 tracking controller in the framework of Zhang-gradient (ZG) method. The superiority of this method lies in clear design procedure. Additionally, three simulation examples are presented to substantiate the feasibility and effectiveness of z0g3 controller for tracking control of the fractional power system.