Analog-to-Digital Interfaces for Microcontroller-based Adaptive Cyclic Regulating Devices for Electrical Plants

摘要

A principle of designing realizable precision interfaces between sensors and digital ports of microcontrollers and microconverters which enable one not only to measure a physical variable but also to estimate its derivative was proposed. These analog-to-digital interfaces were shown to feature higher precision of conversion without additional precision reference power supplies. The basic requirements on the active analog elements are in good agreement with the "system on chip" VLSI circuit technology. Long-term operation of a wide class of electrical plants entails irreversible changes in their parameters affecting substantially the mathematical models incorporated in the control algorithms. Repeated identification and correction of the control laws either requires long deactivation of the equipment or makes it possible to restore the performance indices only for a short period. Additionally, application of new promising sources of electrical power requires many local precision controllers operating in the environment of incomplete a priori information. To work on this class of problems, A.A. Krasovskii suggested a concept of self-organizing optimal controller with extrapolation (SOCE) and developed its applied theory. By way of example of the pipeline control valve, A. R. Gaiduk demonstrated that SOCE makes the given performance factor actually invariant to a wide range of variations of the parameters of pipelines, valves, and motors.