著者

関口 明生

出版者

独立行政法人 国立高等専門学校機構 木更津工業高等専門学校

雑誌

木更津工業高等専門学校紀要 (ISSN:21889201)

巻号頁・発行日

vol.55, pp.107-112, 2021 (Released:2022-05-13)

---

The purpose of engineering is to achieve and maintain the well-being of mankind through the planning, realization and conservation of systems that utilize the resources and properties of nature. Economic activities using engineering techniques have brought material wealth to the lives of mankind. On the other hand, as we all know, the sustainability of the global environment continues to decline rapidly due to increasing pollution of the environment and depletion of resources. Control engineering is the art of improving and maintaining the ideal behavior of various systems by studying their dynamics in a usually quantitative manner. Will the control engineering of today be able to sustainably control such global dynamics? Or are there underlying defects in itself that prevent it from being sustainable? In this article, changes in the representation of control systems, which form the basis of control engineering, are investigated in textbooks available in my college. The results of this investigation confirmed that the representation of control systems has remained virtually unchanged for the last 60 years.

著者

関口 明生 羽鳥 哲史

出版者

独立行政法人 国立高等専門学校機構 木更津工業高等専門学校

雑誌

木更津工業高等専門学校紀要 (ISSN:21889201)

巻号頁・発行日

vol.50, pp.94-97, 2017-01-31 (Released:2017-08-02)

参考文献数

5

---

It is difficult that to accurately run periodic process in cycle of less than a few tens of millisecond, using normal Linux distributions with normal scheduling policy in round-robin fashion. This article shows an easy way to resolve the problem by replacing the kernel with a low latency kernel. Its performance of latency without intentional load was evaluated using a frequently-used command at various interval and priority. It is possible that to design original software which runs on the soft-realtime OS. To evaluate its usability, we demonstrated positional control of a manipulator every 5 milliseconds. By running the control software on CUI environment, standard deviation of the time interval was suppressed compared to running the same software on GUI environment.