Zhang dynamics tracking control of varactor system with stability analysis

Varactor system is a kind of common control model applied in different fields. Meanwhile, tracking control is the most classic and important topic of discussion in control field. On one hand, the tracking control of different models has been studied. On the other hand, a number of methods have been investigated for solving the tracking control problem. Zhang dynamics (ZD) method proposed recently by Zhang et al. is very effective for tracking control. In this study, ZD method is applied to investigate two ZD controllers for the tracking control of varactor system in the situations of no noise perturbation or noise perturbation. Theoretical analyses and simulative verifications show that the tracking errors synthesized by the two ZD controllers are bounded and exponentially convergent.