Robust Nonlinear Perfect Control For Semiconductor Refrigeration Device

The working principle of semiconductor refrigeration device is based on the principles of Peltier device. It has a unique advantage compared with the traditional cooling technology, and it achieves widely application in many fields such as information,national defense, industrial, medical. For the research about the properties of the semiconductor refrigeration, an aluminum plate with Peltier device is very representative.This semiconductor refrigeration is a typical nonlinear plant with unknown uncertainties,therefore, how to guarantee the robust stability and realize the perfect output tracking in the present of unknown perturbations, is still a challenging issue. To consider design and output tracking problems of nonlinear systems, many methods have been proposed, such sliding model-based method, H￥method, and adaptive control method, et al.Compared to these methods, robust right coprime factorization is a more convenient approach in designing and analyzing the robust control system. As a result, in this paper,an operator-based robust tracking control design for an aluminum plate with Peltier device is investigated by using robust right coprime factorization approach, and the perfect tracking performance is achieved. That is, firstly, the operator-based observers are designed to compensate the effect of uncertainties; Secondly, on this basis, a robost stability system is designed for the equivalent plant, and the stable conditions for the plant is derived; Thirdly, a realizable operator-perfect tracking controller is designed to realize the perfect tracking; Finally, the effectiveness of the proposed design method is confirmed by simulation and experimental results.