Fuzzy PID Combined with Smith Predictor Control of GSHP Terminal Fan System

摘要

Ground source heat pump (GSHP) is a promising meaning for “replacing coal with electricity”, which demonstrates time-varying and large time-delay characteristics in its dynamics. Therefore, it is of great significance to design a more efficient control algorithm with strong adaptivity. In this paper, a mathematical model is established for the user-side terminal fan system of GSHP. Subsequently, based on the variable volume temperature difference (VVTD) strategy, the smith predictor is integrated into a fuzzy PID controller to improve the effectiveness. Stability analysis is also provided. Additionally, simulation studies have been conducted to validate the feasibility of the proposed scheme.