Adaptive temperature tracking control for microwave heating process via multirate sampling

Microwave heating has been gradually extended to industrial material process from domestic microwave ovens, since its substantial advantages such as high-efficiency, pollution free, and selective heating. Unfortunately, the drawback of the non-uniform, which may cause thermal runaway, becomes an obstruction for the development of microwave energy. In this paper, our objectives are to achieve the tracking control of multi-point temperature, ensure the global temperature uniformity, and enhance the system adaptivity for deviation of the temperature detecting position in the microwave heating system with the input constraints. Therefore, a multirate simple adaptive control strategy based on almost strictly positive real (ASPR) conditions is proposed, which multirate sampling and lifting technique is used to solve the case that the system has less inputs than outputs. Finally, simulation results demonstrate the effectiveness of the proposed control strategy.

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