著者

岡島 寛 金田 泰昌 田村 友規 松永 信智

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.55, no.4, pp.245-251, 2019 (Released:2019-04-16)

参考文献数

26

被引用文献数

2 3

---

A design method of state estimation observer under outliers and data-lost environment is proposed in this paper. In networked control systems, the data-lost is one of the most important topic for solving. When data-lost occurred, the output data for the control system is disappeared. The data-lost is significant problems if we want to use state feedback. To overcome negative impact by outliers and data-lost, we propose a method to disappear negative impact by outliers and data-lost using median information. The effectiveness of the proposed observer is evaluated by numerical examples.

著者

岡島 寛 松永 信智

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 (ISSN:09161600)

巻号頁・発行日

vol.60, no.2, pp.60-65, 2016-02-15 (Released:2017-04-15)

被引用文献数

1

著者

岡島 寛 竹 祐亮 松永 信智 上瀧 剛

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.55, no.12, pp.783-791, 2019 (Released:2019-12-14)

参考文献数

24

被引用文献数

3 1

---

Many traditional cultural assets in Kumamoto City were damaged by the Kumamoto Earthquakes in 2016. The Kumamoto Castle disastrously damaged by the earthquakes should be completely repaired because it is one of the most important cultural assets in Japan. The Kumamoto Castle recently celebrated its 400th anniversary. In this paper, we propose database design method of broken stones in the Kumamoto Castle for completely repairing the wall of stones which is called “ISHIGAKI”. It is required to find accurate position of each stone before the Kumamoto Earthquakes. However it is difficult to matching each stones because of the shooting environment problem of the photographs of each stone. It is required to construct ISHIGAKI database for matching collect position of stones. We focus on location after broken ISHIGAKI and the surface area of each stone for increasing the ability to find the collect location. Moreover, we propose the entire ISHIGAKI matching algorithm based on not only image matching but also surface area information and location information of stones.

著者

岡島 寛 橋爪 壮一郎 大石 凌史 宮原 智新

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.55, no.2, pp.135-143, 2019 (Released:2019-02-19)

参考文献数

23

被引用文献数

3 4

---

At the sports and games for elementary and junior high school students, their parents often become personal photographer for the game. They see their child over the frame despite being in the playing field. In addition, problems such as trying to take a good place to compete may occur. We can solve these problems by the conference management side distributing the sports competition videos. So in this paper, we show a method to automatically reconstruct movies using competition movies taken by fixed point cameras and to present high quality movies to viewers.

著者

岡島 寛

出版者

公益社団法人 計測自動制御学会

雑誌

計測と制御 (ISSN:04534662)

巻号頁・発行日

vol.62, no.9, pp.555-558, 2023-09-10 (Released:2023-09-15)

参考文献数

17

著者

岡島 寛 西村 悠樹 松永 信智

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.50, no.12, pp.869-874, 2014 (Released:2014-12-23)

参考文献数

22

被引用文献数

4 9

---

This paper deals with a kind of feedback linearization method for the nonlinear affine systems. In case of the standard feedback linearization method, the coordinate transformation is used and the nonlinear terms are canceled by using the nonlinear state feedback. Then, the input-output relation of the systems are linearized in the wide range of the state space. It is well known that the control system does not work well enough if there exists the modeling error and the disturbance. We propose a novel feedback linearization method to achieve good robust performance for the modeling error and disturbance. In our previous researches, a control structure to minimize the model error is proposed for the linear control systems. This structure of the control system is extended to the nonlinear control systems with some improvement. Since the extended control structure includes a feedback path of the error between the plant output and the desired model output, it is expected that the robustness is increasing in the meaning of input-output relation rather than the previous feedback linearization methods. The effectiveness of proposed structure is shown by numerical examples.

著者

岡島 寛

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 (ISSN:09161600)

巻号頁・発行日

vol.64, no.9, pp.349-354, 2020-09-15 (Released:2021-03-15)

参考文献数

31

著者

岡島 寛

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.30, no.10, pp.404-406, 2017-10-15 (Released:2018-01-15)

参考文献数

4

著者

岡島 寛 浅井 徹 川路 茂保

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.44, no.7, pp.566-574, 2008-07-31 (Released:2013-02-25)

参考文献数

21

被引用文献数

5

---

Path following control problem has been treated in recent years. In past studies, the velocity of the plant is considered as constant value. However, the velocity of the plant must be controlled so as to reduce traveling time. In this paper, velocity control in path following problem is discussed by using optimal control. Since reaching time from the start point to the terminal point is used as a cost, we can obtain good acceleration and deceleration input. Since constraints of path following are included in the optimal control problem, we can achieve not only optimization of the cost but also path following. The effectiveness of the proposed method is examined by numerical examples with a path of non-constant curvature.

著者

岡島 寛 南 裕樹

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 (ISSN:09161600)

巻号頁・発行日

vol.61, no.4, pp.158-163, 2017-04-15 (Released:2017-10-15)

参考文献数

10

著者

奥薗 智仁 岡島 寛 松永 信智

出版者

自動制御連合講演会

雑誌

自動制御連合講演会講演論文集 第59回自動制御連合講演会

巻号頁・発行日

pp.736-737, 2016 (Released:2017-02-01)

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株式市場の内部メカニズム検討する手段に人工市場がある。従来の人工市場では投資家の意思決定や取引のルールを重要視したモデル化がされてない。実用的なルールを内包した人工市場を構築すると、公正な証券取引所の再設計にモデルを利用できる。そこで投資家モデル群と売買ルールに基づいた人工市場を設計し、その評価を行う。

著者

松永 信智 岡島 寛 志田 裕紀 松野 大亮

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.851, pp.16-00519, 2017 (Released:2017-07-25)

参考文献数

18

---

To analyze the driving behavior is important for designing a comfortable automatic driving. So far, conventional PID models was widely used to steer the vehicle. It has been assumed that the driver looks at the constant point in conventional PID model. However, all drivers have experiences that the gazing distance changes according to the travel routes, driving situations and driver's characteristics. The PID gain of the steering model is assumed to be modified depending on driver's gazing distance. The facts are familiar, but the relationship between driver's steering gain and the gazing distance has not been clarified yet. If this relation becomes clear, it can be helpful for the comfortable driving assistance and/or automatic driving systems to provide for each driver. The aim of this study is to design a steering model estimated by Particle Swarm Optimization (PSO) depending on gazing distance . The feature of the model is on-line measurement of gazing distance incorporating the gazing distance explicitly into a model. The isolated driving and the following driving are evaluated using a Honda driving simulator. The effectiveness of the model is discussed individually.

著者

藤岡 巧 岡島 寛 松永 信智

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.50, no.12, pp.861-868, 2014 (Released:2014-12-23)

参考文献数

13

被引用文献数

3 7

---

Robust control considering model uncertainty have been widely studied. The benchmark problem using three-inertia system was designed by SICE committee in order to correctly evaluate robust control methods. Traditional robust controller is designed to achieve desired performance for the worst case in a model set. Therefore, it is difficult to achieve high control performance by the traditional robust controller. To overcome this problem, we have proposed a robust control system for this benchmark problem using the model error compensator (MEC) and the frequency shaped final-state control (FFSC). MEC can minimize the gap between real plant and its nominal model. An input signal designed by FFSC can settle desired state variables in terminal period and achieve vibration suppression control. Since MEC is familiar with many other control systems, it is easy to combine FFSC and MEC. Simulation results for the benchmark problem are shown to confirm the effectiveness of proposed method.

著者

佐田 実季 田邉 将之 川脇 治 中村 優花 岡島 寛

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.56, no.6, pp.345-352, 2020 (Released:2020-06-12)

参考文献数

28

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Paved roads are said to be able to use them for a long time with adequate maintenances on a regular basis. However, due to a shortage of manpower for repairs, sufficient maintenance have not been taken on some municipal roads in Japan, and the deterioration has progressed rapidly. Furthermore, around 2025, many asphalt pavements paved during the period of high economic growth in Japan are expected to deteriorate rapidly, hence, a more effective method than the current manual repairing method is required. In this research, we aim to realize a machine that automatically detects and repairs cracks. As a starting point, this paper studies crack detection, one of the important elemental technologies. Assuming actual use, it is necessary to be robust to disturbances such as different colors of paved roads and illumination change due to the weather. To solve this problem, we propose a robust crack detection using deep learning. Specifically, the crack detection was performed by classifying cracked and uncracked areas by semantic segmentation using U-Net. The learning process was performed with various images including lighting changes in the training data set. As a result, we achieved a robust segmentation of cracked areas with 92.5 percent accuracy of Intersection over Union.

著者

岡島 寛

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 (ISSN:09161600)

巻号頁・発行日

vol.61, no.8, pp.347-352, 2017-08-15 (Released:2018-02-15)

参考文献数

7

著者

岡島 寛

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.55, no.12, pp.800-807, 2019 (Released:2019-12-14)

参考文献数

29

被引用文献数

3 2

---

Model based control system design has been developed in many fields based on the dynamics of the accurate plant model. The desired control performance of the transient response can not be achieved if the dynamics gap between the plant and its mathematical model is not small. We have proposed a specified compensator to minimize the gap between an actual plant and its nominal model. The proposed compensator is composed of its plant model and an error feedback component. In this paper, we propose a method to analyze error feedback compensation component based on the analysis method using LMIs. Polytopic-type uncertain continuous LTI systems are dealt with in this paper. The robust performance by the model error compensator is analyzed using H2 and H∞ indexes. The effectiveness of our analysis method is shown by numerical examples.

著者

岡島 寛 一政 豪 松永 信智

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.51, no.11, pp.794-801, 2015 (Released:2015-11-21)

参考文献数

22

被引用文献数

7 3

---

Model based control system design has been developed in many fields based on the dynamics of the accurate plant model. However, the desired control performance is not achieved if the modeling error is not small. To overcome this problem, we have proposed a compensator to minimize the gap between an actual plant and its nominal model. The proposed compensator is composed of its plant model and an error feedback component. It is difficult to apply the compensator for non-minimum phase plants because of its control structure. In this paper, a parallel feedforward compensator is used to overcome the non-minimum phase characteristics. The effectiveness is shown by numerical examples.

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.1, pp.39-49, 2007-01-15 (Released:2011-10-13)

参考文献数

8

被引用文献数

4 2

---

This paper deals with trajectory tracking control for non-minimum phase systems. We first consider to characterize output such that it tracks to a given reference signal asymptotically and that the corresponding input is bounded. In particular, we parameterize the error signals between the reference and the achievable output by using Q-parameters in the frequency domain. Since the parameterized set consists of rational functions which are analytic in the closed right half plane, we can solve easily the problem to minimize theL2norm of the error and the analytic solution of the optimal error is obtained. The optimal output is the projection of the reference to the space of achievable outputs. By using the parameterization, the simultaneous optimization of the error and the input deviation from the steady state input can be also solved. The effectiveness of the proposed method is examined by numerical examples.

著者

奥村 洸祐 岡島 寛 松永 信智

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.30, no.4, pp.153-155, 2016-04-15 (Released:2017-07-15)

参考文献数

5

被引用文献数

2

著者

岡島 寛 松永 信智 川路 茂保

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.45, no.3, pp.153-159, 2009 (Released:2011-11-03)

参考文献数

16

被引用文献数

2 2

---

Electric automobiles with four in-wheel moters have been developed in recent year. By using dynamic differential force between wheels, lateral motion of the automobile can be controlled with yaw moment. This framework is known as “Direct Yaw-moment Control (DYC)”. In many previous works of DYC methods, yaw-moment is used for increasing the stability. However, maneuverability has not been discussed. In this paper, a novel DYC controller is proposed that gives the neutral steering, where neutral steering is a good evaluation index of maneuverability of automobiles. The proposed controller is derived based on the output zeroing control. The effectiveness of proposed method is shown by numerical example.