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Diamond Nanopit Arrays Fabricated by Room-Temperature Nanoimprinting using Diamond Molds

MRS Online Proceedings Library 2011年第1期1282卷 117-122页

作者： Shuji Kiyohara Masaya Kumagai Yoshio Taguchi Yoshinari Sugiyama Yukiko Omata Yuichi Kurashima Hirofumi Takikawa Advanced Faculty of Electric and Control System Engineering Course Maizuru National College of Technology Maizuru Japan Application and Technical Section ELIONIX INC. 3-7-6 Motoyokoyama Hachioji Tokyo Japan Department of Mechanical System Engineering University of Yamanashi 4-3-11 Takeda Kofu Yamanashi Japan Department of Electrical and Electronic Information Engineering Toyohashi University of Technology Toyohashi Aichi Japan

We have investigated the nanopatterning of chemical vapor deposited (CVD) diamond films in room-temperature nanoimprint lithography (RT-NIL), using a diamond nanodot mold. We have proposed the use of polysiloxane as an electron beam (EB) mask and RT-imprint resist materials. The diamond molds of cylinder dot using the RT-NIL process were fabricated with polysiloxane oxide mask in EB lithography technology. The dot in minimum diameter is 500 nm. The pitch between the dots is 2 μm, and dot has a height of about 600 nm. It was found that the optimum imprinting conditions for the RT-NIL : time from spin-coating to imprinting t1 of 1 min , pressure time t2 of 5 min, imprinting pressure P of 0.5 MPa. The imprint depth obtained after the press under their conditions was 500 nm. We carried out the RT-NIL process for the fabrication of diamond nanopit arrays, using the diamond nanodot molds that we developed. The resulting diamond nanopit arrays with 500 nm-diameter and 200 nm-depth after the electron cyclotron resonance (ECR) oxygen ion beam etching were fabricated. The diameter of diamond nanopit arrays was in good agreement with that of the diamond nanodot mold.

关键词： diamond ion-beam processing nanoscale

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Robust ℋ∞ horizon optimization control for sampled-data systems with constraints

Robust ℋ∞ horizon optimization control for sampled-data sy...

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Chinese control Conference (CCC)

作者： Fuchun Liu Hailong Pei Yueying Zhao Min Li College of Automation Science and Engineering the Key Laboratory of Autonomous Systems and Networked Control (ASNC) Ministry of Education South China University of Technology Guangzhou 510640 China Department of Automation Guangzhou Kangda Vocational Technical College 511363 China School of Electronic Information and Control Engineering Shandong Polytechnic University Jinan 250353 China

In this paper, the problem of designing of robust state-feedback H ∞ controller for uncertain sampled-data control systems with output constraints have been investigated base on jump system model of sampled-data system using constant Lyapunov function (CLF) approach. The online algorithm of the H ∞ receding horizon optimization design for the norm-bounded parametric uncertain system is proposed. The optimal state-feedback H ∞ controllers are obtained and these controller can provide a performance tradeoff with respect to output constraints, i.e., the control strategy offers the capability of relaxing the performance level automatically in order to obey output constraints in the case of a larger disturbance. When the disturbance is restored to a usual situation, this control strategy can also improve the performance of system automatically.

关键词： electronic mail Robustness control systems Predictive models Modeling Optimization Predictive control

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A multi-class pattern recognition method for motor imagery EEG data

A multi-class pattern recognition method for motor imagery E...

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IEEE International Conference on systems, Man and Cybernetics

作者： Yonghui Fang Minyou Chen Robert F Harrison State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing China School of Electronic and Information Engineering Southwest University Chongqing China Department of Automatic Control & Systems Engineering University of Sheffield Sheffield UK

The Common Spatial Patterns (CSP) algorithm is useful for calculating spatial filters for detecting event-related desynchronization (ERD) for use in ERD-based brain-computer interfaces (BCIs). However, basic CSP is a supervised algorithm suited only to two-class discrimination; it is unable to solve multiclass discrimination problems. This paper proposes a new method named the binary common spatial patterns (BCSP) algorithm to extend the basic CSP method to multi-class recognition. Our method arranges the spatial filters and Fisher classifiers in the form of a binary tree whereby N - 1 spatial filters and N - 1 Fisher classifiers are calculated for N class recognition. This is fewer than must be calculated in other methods (e.g. one-versus-rest, OVR). This makes the overall classification procedure less redundant. Simulation results show that BCSP has better performance than the OVR scheme and outperforms the three best teams in the 2008 BCI-competition.

关键词： Spatial filters Arrays Feature extraction Electroencephalography Band pass filters Covariance matrix Filtering algorithms

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A Complementary Modularized Ramp Metering Approach Based on Iterative Learning control and ALINEA

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IEEE Transactions on Intelligent Transportation systems 2011年第4期12卷 1305-1318页

作者： Zhongsheng Hou Xin Xu Jingwen Yan Jian-Xin Xu Gang Xiong Advanced Control Systems Laboratory School of Electronic and Information Engineering Beijing Jiaotong University BJTU Beijing China Institute of Automation College of Mechatronics and Automation National University of Defense Technology Changsha China Department of Electrical and Computer Engineering National University of Singapore Singapore Automation Institute Chinese Academy of Sciences (CAS) Beijing China

Ramp metering is an effective tool for traffic management on freeway networks. In this paper, we apply iterative learning control (ILC) to address ramp metering in a macroscopic-level freeway environment. By formulating the original ramp metering problem as an output regulating and disturbance rejection problem, ILC has been applied to control the traffic response. The learning mechanism is further combined with Asservissement Linéaire d'Entrée Autoroutière (ALINEA) in a complementary manner to achieve the desired control performance. The ILC-based ramp metering strategy and the modified modularized ramp metering approach based on ILC and ALINEA in the presence of input constraints are also analyzed to highlight the advantages and the robustness of the proposed methods. Extensive simulations are given to verify the effectiveness of the proposed approaches.

关键词： traffic control Mathematical model Convergence Learning systems Feedforward neural networks

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A Search Algorithm for control Lyapunov Functions Using Radial Basis Function Networks

A Search Algorithm for Control Lyapunov Functions Using Radi...

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SICE Annual Conference

作者： Takayuki Tsuzuki Taiki Yagi Kazunobu Yoshida Yuh Yamashita Department of Electronic and Control Systems Engineering Shimane University Graduate School of Information Science and Technology Hokkaido University

ISBN: (纸本)9784907764388

The control Lyapunov function(CLF) is a powerful tool for the analysis and design of stabilizing control for general nonlinear control systems. However, there is no general method for design of CLFs. This paper shows a search algorithm for a CLF by using a radial basis function network in order to design a stabilizing control for 1-input affine control system.

关键词： control Lyapunov function Radial basis functions network Stabilization problem Neural network

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Maximally Permissive Distributed Supervisory control of Nondeterministic Discrete-Event systems

Maximally Permissive Distributed Supervisory Control of Nond...

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IEEE Conference on Decision and control

作者： Rong Su Jan H. van Schuppen Jacobus E. Rooda Division of Control and Instrumentation School of Electrical and Electronic Engineering Nanyang technological University 50 Nanyang Avenue Singapore 639798 Systems Engineering Group in the Department of Mechanical Engineering Eindhoven University of Technology PO Box 513 5600 MB Eindhoven The Netherlands Centrum voor Wiskunde en Informatica (CWI) P.O. Box 94079 1090 GB Amsterdam The Netherlands

ISBN: (纸本)9781612848006

In supervisor synthesis achieving nonblockingness is a major computational challenge for a large system. In the literature several automaton-based distributed synthesis approaches have been proposed, in which the plant is modeled by a collection of nondeterministic finite-state automata and the requirement and the final distributed supervisor are modeled by a collection of deterministic finite-state automata. In this paper we provide a sufficient condition, which guarantees maximal permissiveness of the synthesized distributed supervisor.

关键词： discrete-event systems nondeterministic finite-state automata automaton abstraction distributed supervisor synthesis maximal permissiveness

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Robust passive control for uncertain nonlinear neutral Markovian jump systems with mode-dependent time-delays

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ICIC Express Letters 2011年第1期5卷 119-126页

作者： Qiu, Jiqing Lu, Kunfeng Mahmoud, Magdi S. Yao, Na Du, Xiaoming College of Science Hebei University of Science and Technology No. 70 Yuhua East Rd. Shijiazhuang 050018 China Department of Automatic Control Beijing Institute of Technology No. 5 South Zhongguancun Street Haidian District Beijing 100081 China Systems Engineering Department KFUPM P. O. Box 985 Dhahran 31261 Saudi Arabia Science of College Chang'An University Mid-section of South Second Ring Road Xi'an 710064 China

This paper is concerned with the problem of robust passive control for uncertain nonlinear neutral system with mode-dependent time delays and Markovian jump parameters. First, novel robust stability criterion is investigated by utilizing the Lya- punov functional and combining with linear matrix inequality (LMI) approach. Then, a state feedback controller with Markovian jump parameters is established to guarantee that the resulting closed-loop system is robustly stable with an passive performance level. The time-varying delay function in this paper is not required to be either continuously differentiable, or its derivative less than one and dependent on the mode of operation. Finally, a numerical example is provided to illustrate the effectiveness of the proposed approach. © 2011 ISSN.

关键词： Linear matrix inequalities

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A robust stabilization using state feedback with feedforward

A robust stabilization using state feedback with feedforward

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作者： Danapalasingam, Kumeresan A. La Cour-Harbo, Anders Chowdhary, Girish Bisgaard, Morten Department of Electronic Systems Section for Automation and Control Aalborg University 9220 Aalborg Denmark Georgia Institute of Technology Daniel Guggenheim School of Aerospace Engineering Atlanta GA United States

ISBN: (纸本)9781424474264

In a general nonlinear control system a stabilizing control strategy is often possible if complete information on external inputs affecting the system is available. Assuming that measurements of persistent disturbances are available it is shown that the existence of a smooth uniform control Lyapunov function implies the existence of a stabilizing state feedback with feedforward control which is robust with respect to measurement errors and external disturbances. Conversely, using differential inclusions parameterized as nonlinear systems with state and disturbance measurement errors, it is shown that there exists a smooth uniform control Lyapunov function if there is a robustly stabilizing state feedback with feedforward. This paper demonstrates that if there exists a smooth control Lyapunov function for a general nonlinear system with persistent disturbances for which one has previously designed a feedback controller, a feedforward always exists to be augmented for stability. © 2010 AACC.

关键词： Lyapunov functions

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Parameter estimation of ship linear maneuvering models

Parameter estimation of ship linear maneuvering models

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OCEANS - Europe

作者： E. Revestido F. J. Velasco I. Zamanillo E. López E. Moyano Department Electronic Technology Systems Engineering and Automatic Control E.T.S. de Náutica University Cantabria. Cantabria Spain Department Sciences and Navigation Techniques Engines and Naval Architecture E.T.S. de Náutica y Mquinas Navales University of the Bask Country Bizkaia Spain Department Applied Mathematics and Computing Sciences E.T.S. de Ingenieros Industriales y Telecomunicación University of Cantabria Santander Spain

In this paper, it is applied a method for parameter estimation of ship linear maneuvering models with a standard zig-zag maneuver. The parameter estimation is made based on prediction error methods, using the Kalman filter for the states estimation. It is suggested two cases of study: one in simulation and another one with data acquired in open waters. Thus, it is posible to quantify the statistical properties of the estimator by means of Monte Carlo simulation and to validate the model with simulated and acquired data.

关键词： Mathematical model Data models Marine vehicles Parameter estimation Propellers Noise Noise measurement

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Stability analysis for class of switched nonlinear systems

Stability analysis for class of switched nonlinear systems

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作者： Shaker, Hamid Reza How, Jonathan P. Department of Aeronautics and Astronautics Aerospace Controls Laboratory Massachusetts Institute of Technology Cambridge MA United States Department of Electronic Systems Section of Automation and Control Aalborg University United States

ISBN: (纸本)9781424474264

Stability analysis for a class of switched nonlinear systems is addressed in this paper. Two linear matrix inequality (LMI) based sufficient conditions for asymptotic stability are proposed for switched nonlinear systems. These conditions are analogous counterparts for switched linear systems which are shown to be easily verifiable and suitable for design problems. The results are illustrated by numerical examples. © 2010 AACC.

关键词： Asymptotic stability

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