著者
吉川 恒夫 井村 順一 村井 雅彦
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.3, no.7, pp.218-225, 1990-07-15 (Released:2011-10-13)
参考文献数
10
被引用文献数
1 1

In this paper, we propose a robust control scheme which achieves trajectory tracking with prescribed accuracy for robot manipulators with bounded unknown parameters. This scheme is based on Lyapunov stability theorem, and the Lyapunov function is constructed using the intertia matrix. Therefore, the control law takes a very simple form which does not include the inverse of the intertia matrix. Moreover, based on the assumption that the dynamic equation can be expressed as a sum of products of unobservable matrices which contain unknown parameters and observable state vectors, this scheme makes the best use of observable states. Due to this we can expect smaller control gains. Finally, the effectiveness of the proposed control sheme is shown by numerical simulations and experimental results using a 2-degree-of-freedom manipulator.
著者
小中 英嗣 鈴木 達也 大熊 繁
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.15, no.5, pp.253-261, 2002-05-15 (Released:2011-10-13)
参考文献数
7
被引用文献数
1 2

Hybrid Dynamical Systems (HDS), which contain both discrete symbol and continuous signal, are attracting great attention in the field of system control. In this paper, a new symbol based control strategy for a line following control of a two wheeled vehicle is proposed. The vehicle is supposed to have a low-resolution sensor and actuator. The control requirement, however, is specified so as to keep the vehicle as close as possible to the center of the line. The controllability and observability issues are investigated, and a concrete control policy based on the continuous state estimation is proposed. Some experimental results are shown to demonstrate the usefulness of our idea.
著者
小熊 尚太 大松 繁 大野 修一 岩崎 和宏
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.35, no.4, pp.84-92, 2022-04-15 (Released:2022-07-15)
参考文献数
12

Since unexpected machine failures are huge losses for users, maintenance activities are essential. If the failures can be predicted in advance using a supervised learning, the machines can be maintained before they break down and some failures can be prevented. However, although a large number of failure data are required to predict failures using a supervised learning, failures rarely occur in the actual field. In this study, we propose to detect the failure of a hydraulic excavator using an autoencoder, which is an unsupervised learning. By using the autoencoder to model normal state data, the failure can be predicted in advance. This paper shows the results of evaluating failure predictions using the LSTM (Long Short-Term Memory) autoencoder model for actual failure of hydraulic excavators.
著者
粂田 一仁 伊藤 敏博 小川 栄司 中島 孝 亀井 且有 井上 和夫
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.7, no.4, pp.122-133, 1994-04-15 (Released:2011-10-13)
参考文献数
10
被引用文献数
1 1

A ceramic kiln is a two-input/two-output system where temperature and atmosphere (hydrogen or carbon monoxide) inner it are controlled by fuel and a damper. The ceramic kiln has a huge heat capacity and is a nonlinear system because the combustion characteristics in the kiln is always changing due to interference of temperature and atmosphere. Experts, therefore, have been controlling it based on their experimental knowledge.In this paper, we try to control the ceramic kiln by fuzzy control. First, we make a kiln model based on the combustion theory. Next, we choose membership functions of the fuzzy controller while simulating the fuzzy control of the ceramic kiln using the kiln model and fuzzy production rules given by experts. Finally, we make experiments on the fuzzy control for a real ceramic kiln in Shigaraki, Shiga Prefecture, and show some experiment results.
著者
岡島 寛 浅井 徹
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.20, no.4, pp.133-143, 2007-04-15 (Released:2011-10-13)
参考文献数
15
被引用文献数
6 3

This paper deals with path-following control. In existing path-following methods, velocity of e.g. vehicles has been often given as reference inputs. However, velocity is tied in with other tracking characteristics and there exist trade-offs between velocity, tracking errors, control costs and so on. To deal with the trade-offs explicitly, we first formulate a cost function based on difference between a reference path and trajectories of vehicle motion. The difference is modeled in terms of dynamics of curvature. This formulation enables us to deal with trade-offs among tracking error, reaching time and control costs. The control input can be given by solving a two point boundary problem numerically. The effectiveness of the proposed method is examined by numerical examples.