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Synchronous Position Control Strategy for Bi-cylinder Electro-pneumatic Systems
Pinhas Ben-Tzvi,Hong Zhao 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.6
Pneumatic systems have been widely used in industrial applications because of their well-known advantages. However, pneumatic systems possess several disadvantages that include strong non-linearity and low naturalfrequency. These drawbacks make it difficult to obtain satisfactory control performances in comparison to hydraulicand electromechanical systems. In this paper, the fundamental characteristics and nonlinear synchronous controlstrategy of pneumatic systems are studied. A two-layer sliding mode synchro-system based on friction compensationis applied to electro-pneumatic cylinders and a synchro-PID controller is utilized for position tracking. Tovalidate the developed strategy, experiments with bi-cylinder electro-pneumatic systems were performed. The experimentalresults demonstrate that the synchronous position control scheme is effective in terms of accuracy androbustness.
남수철,고백경,구본길,강성범,신정훈 대한전기학회 2020 전기학회논문지 Vol.69 No.11
The PMU can collect time synchronized and very accurate monitoring data. Recently, this technology has received a lot of attention to improve the stability of the power system. The PMU provides fast and accurate monitoring information to the operator, helping the operator to make the best choice. For this reason, many countries are adopting PMU technology. Korea has also attempted to introduce PMU technology, but the introduction has been delayed for various reasons. As the use of PMUs is delayed, concerns about operational difficulties due to renewable energy are increasing in the field. To solve these problems, KEPCO conducted research on expanding the introduction of PMU technology from 2017, and completed it in June 2020. Through the successful implementation of this research project and application to the field, KEPCO has played an important role in changing the negative perception of PMU by domestic engineers. This paper introduces the efforts of KEPCO and plans to expand the use of PMUs in Korea in the future