The University of Limoges developed a compact sensing module that measures particle beam properties and substrate surface temperatures during plasma spraying. In this paper, the authors explain how they built and tested a closed-loop controller for APS processes using the sensing module. One of the key elements in the online control system is an empirical model that relates process inputs, in-flight particle parameters, substrate temperatures, and coating properties. The paper discusses the development and implementation of the model and the determination of the main input parameters. Paper includes a German-language abstract.

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