Finite Control of Actuators of Machines for Ultra-Jet Processing and Diagnostics of Materials

This paper deals with the issues of synthesis of suboptimal systems with regard to speed and accuracy that control the ultra-jet processing head with an acceptable control level restriction. It is noted that the provision of speed and accuracy of the operating parameters directly effects the reliability of evaluation and interpretation of quality indicators of ultra-jet processing and diagnostics of materials and products. The authors conduct an analysis of existing approaches to synthesis of the optimal drive control system taking into account a number of quality criteria based on the location of the roots of the characteristic closed-loop equation, providing limit and suboptimal performance processes. It is shown that synthesis of such systems should be based on the application of discrete finite control of machine actuators with an optimal adjustable sampling period and the methodology of model predictive control. A formal optimality criterion is proposed, and an example of structural synthesis of a quasi-finite control system for the actuator of movement of the ultra-jet head with a control level restriction is given. The results of simulation that confirm the effectiveness of the proposed approach are provided.

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