論文 - 穂高 一条
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Improvement of maximum power point tracking based on nonlinear control of boost converter 査読あり
Setiawan E., Hodaka I., Yamamoto Y., Jikuya I.
Proceedings of 2012 IEEE Conference on Control, Systems and Industrial Informatics, ICCSII 2012 180 - 184 2012年12月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス) 出版者・発行元:Proceedings of 2012 IEEE Conference on Control, Systems and Industrial Informatics, ICCSII 2012
A Maximum Power Point Tracking (MPPT) is commonly applied in photovoltaic system in order to harvest the maximal power. One of the widely used MPPT techniques is socalled Perturb and Observe (P & O). However, P & O MPPT has a shortage on operating point swinging around maximum power point (MPP), where one can never achieve a MPP. In order to reduce the shortage, new nonlinear control is presented. The proposed control is applied for boost converter which is commonly used in photovoltaic system. The controller is designed based on state-space averaging and nonlinear control theory. In the experiment, the proposed controller is implemented in a real circuit that utilizes solar array simulator to displace the photovoltaic module. Experiment result shows that the proposed method can suppress the oscillation of MPPT. © 2012 IEEE.
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Symbolic Analysis of Maximizing Efficiency of Photovoltaic Power Generation Circuits 査読あり
Eko Setiawan, Ichijo Hodaka, Yuta Yamamoto
Proceedings of 11th WSEAS Int. Conf. on SYSTEM SCIENCE and SIMULATION in ENGINEERING (ICOSSSE '12) 2012年5月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス)
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System Identification Approach to Diagnostics for Switching Circuits 査読あり
Yuta Yamamoto, Ichijo Hodaka, Eko Setiawan
Proceedings of 11th WSEAS Int. Conf. on SYSTEM SCIENCE and SIMULATION in ENGINEERING (ICOSSSE '12) 2012年5月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス)
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Jikuya I., Hodaka I.
IFAC Proceedings Volumes (IFAC-PapersOnline) 18 ( PART 1 ) 1307 - 1312 2011年12月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス) 出版者・発行元:IFAC Proceedings Volumes (IFAC-PapersOnline)
This note discusses the steady state response of a linear periodic system with a periodic input, especially for linear systems with periodic and piecewise continuous coefficients. The first order approximation of the steady state response with respect to the period of time is obtained for general linear periodic systems. This result is then applied to analyze the buck-boost converter operating in continuous conduction mode. This mathematically clarifies conventional results of switching converters which have been deduced under physical inspections or assumptions. © 2011 IFAC.
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On the Klimushchev–Krasovskii theorem 査読あり
Ichiro Jikuya, Ichijo Hodaka
Automatica 47 ( 10 ) 2323 - 2325 2011年10月
記述言語:英語 掲載種別:研究論文(学術雑誌)
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An Explicit Parametrization of the Set of All Solutions to Linear Periodic Systems 査読あり
Ichiro Jikuya, Ichijo Hodaka
Proceedings of The 19th International Symposium on Mathematical Theory of Networks and Systems (MTNS 2010) 2010年7月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス)
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Maximum parametrization of the set of all solutions to linear periodic systems 査読あり
Jikuya I., Hodaka I.
IFAC Proceedings Volumes (IFAC-PapersOnline) 4 ( PART 1 ) 7 - 11 2010年
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス) 出版者・発行元:IFAC Proceedings Volumes (IFAC-PapersOnline)
In the Floquet representation theorem, a state transition matrix whose second argument is 0 is represented as a product of a real-valued periodic matrix function and a real-valued matrix exponential function. In contrast, we have proposed a novel representation as a product of a real-valued periodic matrix function and two real-valued matrix exponential functions. In this note, the structure of the previously proposed representation is intensively investigated in terms of the maximum parametrization. © 2010 IFAC.
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A floquet-like factorization for linear periodic systems 査読あり
Jikuya I., Hodaka I.
Proceedings of the IEEE Conference on Decision and Control 6432 - 6437 2009年12月
記述言語:英語 掲載種別:研究論文(学術雑誌) 出版者・発行元:Proceedings of the IEEE Conference on Decision and Control
In this note, the novel representation is proposed for a linear periodic continuous-time system with T-periodic real-valued coefficients. We prove that a T-periodic real-valued factor and two real-valued matrix exponential functions can be extracted from a state transition matrix, while, in the wellknown Floquet representation theorem, a 2T-periodic real-valued factor and a real-valued matrix exponential function are extracted from the state transition matrix. Then we also proved that any T-periodic system can be transformed to a system with T-periodic real-valued trigonometric coefficients using a T-periodic real-valued coordinate transformation, while, in the well-known Lyapunov reducibility theorem, a 2T-periodic real-valued coordinate transformation is utilized to transform the given periodic system into a time-invariant system with real coefficients. This new information can be useful for designing a T-periodic control law. ©2009 IEEE.
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電気二重層キャパシタ充電回路の制御
穂高一条,永松和也
宮崎大学工学部紀要 ( 38 ) 165 - 172 2009年9月
記述言語:日本語 掲載種別:研究論文(大学,研究機関等紀要)
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磁気トルカを用いた小型衛星の姿勢制御の可制御性について
穂高一条,渡邉泰三
宮崎大学工学部紀要 ( 38 ) 173 - 180 2009年9月
記述言語:日本語 掲載種別:研究論文(大学,研究機関等紀要)
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太陽電池・電気的特性シミュレータの開発
穂高一条,平井大雅
宮崎大学工学部紀要 ( 38 ) 189 - 194 2009年9月
記述言語:日本語 掲載種別:研究論文(大学,研究機関等紀要)
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太陽光発電のためのNi-MH電池充電回路の制御
穂高一条,輝直樹
宮崎大学工学部紀要 ( 38 ) 181 - 188 2009年9月
記述言語:日本語 掲載種別:研究論文(大学,研究機関等紀要)
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A period-specific realization of linear continuous-time systems 査読あり
Hodaka I., Jikuya I.
IFAC Proceedings Volumes (IFAC-PapersOnline) 17 ( 1 PART 1 ) 2008年12月
記述言語:英語 掲載種別:研究論文(学術雑誌) 出版者・発行元:IFAC Proceedings Volumes (IFAC-PapersOnline)
It is a well-known fact that a weighting pattern matrix is realizable as a linear periodic system if and only if the matrix is separable and periodic. This fact, however, can not cope with a reasonable question when a weighting pattern matrix can be realized as a linear periodic system with a specific period of time. This paper answers the question by constructing two types of period-specific realizations. Moreover, this paper describes in detail how the lowest dimension of period-specific realizations is identified. Copyright © 2007 International Federation of Automatic Control All Rights Reserved.
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連続時間線形周期システムの Kalman 正準分解に関する一考察 : システムの倍周期での状態空間の可制御・不可制御部分への分解 査読あり
軸屋 一郎, 穂高 一条
計測自動制御学会論文集 44 ( 8 ) 692 - 694 2008年8月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 出版者・発行元:計測自動制御学会
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A Period-Specific Realization of Linear Continuous-Time Systems 査読あり
I. Hodaka, I. Jikuya
Proceedings of the 17th IFAC World Congress 1287 - 1292 2008年7月
記述言語:英語 掲載種別:研究論文(国際会議プロシーディングス)
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連続時間線形周期システムのKalman正準分解に関する一考察:システムの倍周期での状態空間の可制御・不可制御部分への分解 査読あり
軸屋 一郎, 穂高 一条
計測自動制御学会論文集 44 ( 8 ) 692 - 694 2008年
記述言語:日本語 掲載種別:研究論文(学術雑誌) 出版者・発行元:The Society of Instrument and Control Engineers
Although it was shown in our previous paper that canonical periodic decomposition with the same period of a given linear periodic continuous-time system is invalid in general, it is shown here that decomposition with the double period is valid without any exception.
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穂高 一条, 軸屋 一郎
計測自動制御学会論文集 44 ( 4 ) 302 - 308 2008年
記述言語:日本語 掲載種別:研究論文(学術雑誌) 出版者・発行元:The Society of Instrument and Control Engineers
This paper develops the realization theory for linear periodic continuous-time systems. The substantial difficulty in the period-specific realization problem is that there may be no solution among linear periodic systems whose dimensions are equal to the order of a given weighting pattern matrix, in sharp contrast with realization problems for general linear time-varying systems or linear time-invariant systems. This paper proves the existence of period-specific realizations even when there exists no realization with dimension equal to the order of the weighting pattern matrix. It is finally shown that the realizations obtained in this paper have a <I>minimal</I> dimension among all of possible realizations with a specific period of time.
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穂高 一条, 軸屋 一郎
計測自動制御学会論文集 43 ( 12 ) 1090 - 1096 2007年12月
記述言語:日本語 掲載種別:研究論文(学術雑誌) 出版者・発行元:計測自動制御学会
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On Kalman canonical decomposition of linear periodic continuous-time systems with real coefficients 査読あり
Jikuya I., Hodaka I.
IFAC Proceedings Volumes (IFAC-PapersOnline) 3 ( PART 1 ) 257 - 262 2007年12月
記述言語:英語 掲載種別:研究論文(学術雑誌) 出版者・発行元:IFAC Proceedings Volumes (IFAC-PapersOnline)
In this note, structural decomposition of linear periodic continuous-time systems is discussed. A fundamental problem to decompose a state of a periodic system into controllable and uncontrollable parts is conjectured to be achieved by a continuously differentiable and periodic coordinate transformation with the same period of the system, however there is a counterexample to this conjecture. Hence we derive a condition for the existence of such a coordinate transformation. We also prove that, by relaxing a class of coordinate transformation, it is always possible to construct a periodic coordinate transformation with the double period of the periodic system.
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連続時間線形周期システムのKalman正準分解に関する一考察 - システムと同じ周期での状態空間の可制御・不可制御部分への分解 査読あり
軸屋一郎・穂高一条
計測自動制御学会論文集 43 ( 10 ) 892 - 900 2007年10月
記述言語:日本語 掲載種別:研究論文(学術雑誌)