Keywords: Robust Optimal 2-riccati Uncertainties H2-regulator Article history:Introduction. Investigated robust optimal control system of pasteurization-cooling unit, functioning under conditions of intensive external disturbances, information and structural uncertainty in order to improve the efficiency.Materials and methods. Methods of system analysis, mathematical statistics and identification used to construct a mathematical model of the control object. For the synthesis of the robust optimal controller, the 2-Riccati approach H 2 control problems is applied, and to reduce the order of the received regulator -method for balanced model reduction.Results and discussion. The work of the pasteurization unit is considered, since it is a key component of dairy production. Since the results of the operation of traditional automated systems depend on the intensity and quality of information flows, microprocessor technology, algorithmic and software, it is proposed to supplement them with robust optimal controllers based on the 2-Riccati approach. Identified a mathematical model of the object, which consists of linear differential equations of the seventh order, it is possible to synthesize a robust optimal controller of the 6th order. Performance indicators are calculated by comparing the synthesized system and the system with local regulators. In a robust optimal system, the magnitude of uncertainty increased fourfold, and the dispersion of control signals decreased fourfold, which proves its energy efficiency.Conclusion. The performed modeling and calculation of qualitative characteristics showed a significant advantage of the synthesized system in front of systems with local regulators.
The article works out the structure of the relationship between the managerial lev els of the food enterprise, which is developed taking into account the use of robust control systems in the abnormal mode and systems of repair of heat power. To optimize renewable energy systems to the existing range of technological equipment of the bakery, a cogeneration unit is installed, due to its ability to generate and consume both heat and electricity. Also it is shown that the emergence of an abnormal situation at the electrotechnological complex of food production leads to a significant change in the transfer coefficients of the object over the direct and crosschannel channels, which will lead to loss of stability of the closed control system. Synthesized structure robust control system which has roughness properties and minimal sensitivity to parametric and structural uncertainties facility in case of emergency situations and elected its optimization criterion. The basic properties of the electrotechnological complexes of food industries are analyzed and on the example of the baking furnace the robust control system synthesis and renewable energy systems are shown. A comparison of the characteristics of the control system with local and robust controllers has shown that a robust controller system has better robust properties in case of emergency situations. * Corresponding author: z-n@ukr.net
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