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Abstract. At present the significantly increased interest in micro-arc oxidation (MAO) encourages scientists to look for the solution of the problem of this technological process controllability. To solve this problem an automated technological installation MAO was developed, its structure and control principles are presented in this article. This device will allow to provide the controlled synthesis of MAO coatings and to identify MAO process patterns which contributes to commercialization of this technology. IntroductionMicro-arc oxidation (MAO) is a perspective technological process, demanded in many sectors of industry: automobile, aircraft and aerospace manufacturing, electronics, medicine, photonics and nanotechnology. Its essence lies in the surface treatment of parts made of valve metals and alloys, in particular aluminum, to impart them unique properties: high micro-hardness, wear resistance and corrosion resistance (increase the reliability and durability of machine parts); high thermal conductivity (allows us to produce smaller radiators with the same power dissipation); good biocompatibility (used in prosthetics); ordered pores structure of the top layer of the MAO coating (allows to grow arrays of nanowires in a matrix of aluminum oxide, for example, to obtain metamaterials).However, the complexity and multifactorial of MAO process prevents the commercial implementation of this technology, because the mode of equipment operation for each application has its own characteristics. To resolve this problem, it is necessary to install the relationship between MAO technological process parameters and properties of obtained coatings.Works of this kind have already been held in Russia [1] and abroad [2] -[5], but they could not provide enough information for a full and comprehensive analysis of the MAO process (the effect of only one or a group of parameters of MAO process on one or some more coating properties was studied and other factors were not considered). In addition, in these works the investigation of the MAO coatings properties was carried out only after receiving them. It was not possible to change the conditions for obtaining or control of coatings properties during the manufacturing process.

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During the implementation of scientific research on the direction of automation of feed mills there was a significant disadvantage. The losses resulting from this shortcoming are, according to our estimates, about 1.2 billion hryvnias per year only within the framework of Ukraine. The disadvantage is connected with the current system of techno-chemical control. The presence of significant delays in the channel analysis of qualitative characteristics leads to the loss of the possibility of using the information obtained in the work of the automatic control system. The developed system of automatic samplers allows to minimize the time for obtaining actual data on the qualitative characteristics of grain mixtures directly during their processing and accordingly expands the possibilities of automation of these processes. Existing systems of analysis of grain characteristics in real time, i.e. directly during the process of processing, are quite costly, which greatly complicates the possibility of constructing an expanded system for analyzing the quality of raw materials at all stages of production. In addition, the integration of these analyzers requires the production of serial installation work on the production line, and accordingly requires for the installation of a temporary stop of production. The installation of stationary multispectral analyzers requires the presence and, accordingly, further maintenance of a full-fledged laboratory. However, the essential disadvantage in this case is the lack of relevance of the data. Thus, when using stationary multispectral analyzers, the data obtained only records the logs and in no way are used by systems of automatic process control at the enterprise. In a sublunary manner, analyzers have been tightened due to the separation of two different processes in principle, which are to be in the multispectral analysis, namely, the process of removing the multispectral sweep and analyzing the resulting scan with the aim of determining specific quality characteristics of the grain mixtures. Thus, in some devices, the sweep is taking place, and their analysis is already taking place in a single multispectral analyzer, which in turn is connected to cloud technologies.

The technical progress development contributes to the introduction of automated methods of management and control of the system state. The use of sensor equipment with the use of piezoelectric tensor-resistive modules allows to register fast variable and statistical pressure, respectively. Such assemblies possess not only the most reliable information content of the measured values, but also combine simple step-by-step manufacturing techniques.