An Integral Terminal Sliding Mode-Based Approach to Control the Super Heat Temperature of a HVAC System

This paper deals with the design and analysis of an integral terminal sliding mode control for heating ventilation and air conditioning systems. The proposed approach aims at controlling the super heat temperature of the evaporator. The design relies on a nested two-loop structure. An internal loop to control the evaporating temperature and an external one to regulate the superheat temperature. Controller gains were auto-tuned using a fuzzy logic approach. The performance of the proposed approach was illustrated using numerical simulations implemented with MATLAB/Simulink and compared to the standard SMC. The obtained results showed good overall dynamics and chattering-free performance.