著者
薄 良彦
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.51, no.1, pp.37-42, 2012-01-10 (Released:2021-04-09)
参考文献数
37
被引用文献数
2
著者
楢原 弘之
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.54, no.6, pp.381-385, 2015-06-10 (Released:2015-06-22)
参考文献数
20
被引用文献数
4
著者
土屋 喜一
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.3, no.4, pp.294-300, 1964-04-10 (Released:2010-10-21)
参考文献数
9
著者
住友 宣仁 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.57, no.8, pp.349-357, 2021 (Released:2021-08-20)
参考文献数
39
被引用文献数
1

In this study, we propose a path-following control method based on the state feedback law. In recent years, automated driving which attracts attention requires various element technologies, and among them, path following control to follow the target path is one of the most important elemental technologies. In previous study, a method was proposed that gave a constraint that makes the following error asymptotically zero. However, if the target path has a road width, the tracking error does not have to be zero. In this paper, a reference value for the tracking error is designed as a function of the vehicle state and other factors. The effectiveness of the proposed method was validated by numerical simulations and showed better performance than previous studies.
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.823-829, 2019 (Released:2019-12-14)
参考文献数
23
被引用文献数
1 3

This paper dealt with a design method of MCV observer using robust invariant set analysis method. In our previous research, a design method of state observer for output signal with outliers was proposed. In some control systems, adverse effect by outliers is one of the most important topics for solving. To overcome the adverse effect by outliers, we proposed a method to disappear the effect of outliers using median and candidates of estimated state. In this paper, we give an evaluation signal, and analyze the maximum absolute value of the evaluation signal using a robust invariant set. We propose the design method of observer gains to minify the maximum absolute value of the evaluation signal based on LMIs with some variables. It is easy to design the observer gains by our method. The effectiveness of the proposed design method of observer gains is evaluated by numerical simulation.
著者
岡島 寛 細江 陽平 萩原 朋道
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.54, no.11, pp.827-835, 2018 (Released:2018-11-22)
参考文献数
24
被引用文献数
1

This study proposes a design method of dynamic quantizer with communication rate constraints. Dynamic quantizers are well known as an effective method for the signal quantization in the meaning of the noise shaping. The noise shaping characteristics of the dynamic quantizers are determined by the matrices A, B and C. In the previous studies, A, B and C are given as time-invariant matrices. In this paper, we propose a dynamic quantizer form including periodically time-varying matrices for improving the control performance under the communication rate constraints. Analysis method of periodically time-varying dynamic quantizer is reduced to that of dynamic quantizers using time invariant matrices by using lifting technique. The effectiveness of the designed periodically time-varying dynamic quantizer is assessed via numerical examples.
著者
岡島 寛 南 裕樹 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.52, no.7, pp.393-400, 2016 (Released:2016-09-29)
参考文献数
24
被引用文献数
1

Networked control has been studied by many researchers in recent years. This paper proposes a new system structure of the networked control systems. The evaluation system is presented to find the performance degradation caused by the communication channels. The proposed system has high degree of freedom for design and is not cumbersome structure. The effectiveness of the proposed structure is illustrated by numerical simulations.
著者
岡島 寛 上瀧 剛 松永 信智 内村 圭一
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.9, pp.645-654, 2015 (Released:2015-10-08)
参考文献数
19
被引用文献数
1

A digital halftoning method for DLP projector system is proposed in this paper. PWM type 2-value images have been rapidly switched to achieve high resolution image in DLP projector systems. To achieve high frame rate image projection with high image quality, it is required to reduce the number of 2-value images with small degradation of the image quality. We propose a framework for optimizing color quantization and luminance for DLP projector system with a few number of the 2-value images. The optimal light intense is designed based on a particle swarm optimization algorithm. We illustrate the effectiveness of the proposed method by numerical examples.
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.10, pp.648-654, 2019 (Released:2019-10-18)
参考文献数
33
被引用文献数
1

Tracking performance of non-minimum phase systems under the continuous deadbeat condition is handled in this paper. It is well known that tracking performance is constrained and is difficult to achieve good transient response for the plant with unstable zeros. It seems that the deadbeat time and minimum undershoot by controller has some relation. In this paper, we derive analytical solution of a minimum undershoot for plants with one unstable zero when we want to achieve tracking control for the step reference. The effectiveness is illustrated using numerical simulations.
著者
久我 創紀 中村 文一 佐藤 康之
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.54, no.12, pp.865-871, 2018 (Released:2018-12-18)
参考文献数
19
被引用文献数
1

We propose a “static” C∞ differentiable control Lyapunov function (CLF) design method for differentially flat systems by dynamic extension and minimum projection method. For differentially flat systems, “dynamic” CLF with dynamic compensators are designed. Our proposed “static” CLF is obtained by the reduction of the “dynamic” CLF. Then we design a static state feedback controller with the obtained static CLF. Finally we show an example to show that our proposed static CLF based controller can stabilizes the origin of the system.
著者
赤井 直紀 モラレス ルイス 洋一 平山 高嗣 村瀬 洋
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.11, pp.745-753, 2019 (Released:2019-11-20)
参考文献数
29

This paper presents a localization approach that simultaneously estimates a robot's pose and class of sensor observations, where “class” categorizes the sensor observations as those obtained from known and unknown objects on a given geometric map. The proposed approach is implemented using Rao-Blackwellized particle filtering algorithm. The robot's pose can be robustly estimated utilizing sensor observations obtained from the only known objects by the simultaneous estimation. The proposed approach is efficient in terms of computational complexity because its complexity is same as that of the likelihood field model. Performance of the proposed approach was shown through experiments using a 2D LiDAR simulator.