检索结果-内蒙古大学图书馆

International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology

作者： Vorashompoo, Amorn Panomruttanarug, Benjamas Higuchi, Kohji Faculty of Engineering Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand Department of Electronic Engineering University of Electro-Communications Tokyo 182-8585 Japan

ISBN: (纸本)9781457704246

One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the shortest pathway from an initial vertex to a goal vertex in a directed graph, implying that the initial and goal states must be known in advance. In each step for searching, there are three possible nodes generated from the configuration space (or C-space), that the algorithm must decide to traverse to based on a best first search algorithm. Giving a start and goal points, the designed path is obtained by simulation in MATLAB. The experimental results show an ability to perform a parking maneuver using the simulated path. © 2011 IEEE.

关键词： MATLAB

来源：评论

学校读者我要写书评

暂无评论

The advantages and disadvantages of kalman filtering in iterative learning control

The advantages and disadvantages of kalman filtering in iter...

引用

18th Annual Space Flight Mechanics Meeting

作者： Panomruttanarug, Benjamas Longman, Richard W. Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Mechanical Engineering Civil Engineering and Engineering Mechanics Columbia University New York NY 10027 United States

ISBN: (纸本)9780877035442

Iterative learning control (ILC) can eliminate deterministic tracking errors of a control system that repeatedly performs the same tracking maneuver. It iterates with the real world rather than with a model aiming to achieve this zero error, and hence it can achieve lower final error levels in the real world than one could obtain when limiting oneself to using a mathematical model aiming to achieve zero tracking error. There are spacecraft applications when fine pointing sensors perform repeated scans. When there is substantial plant and measurement noise, it is natural to consider using a Kalman filter to improve the signal used by the learning control law. In a separate work, this was analyzed for the sister field of repetitive control (RC). It was observed that when the model in the Kalman filter is imperfect, the use of a Kalman filter can make the final error levels worse rather than better, and care must be taken to assess the benefit in reduced random variations compared to the deterministic error introduced. This is also the case when there are unmodeled repeating external disturbances. Here we show that the same situation applies to ILC if one uses a Kalman filter running in time steps during each iteration. But one can reformulate the Kalman filter to operate in the repetition or iteration domain, and when this is done, one can still converge to zero expected value of the tracking error in the presence of model errors and external repeating disturbances.

关键词： Kalman filters

来源：评论

学校读者我要写书评

暂无评论

Fuzzy Logic Based Autonomous Parallel Parking system with Kalman Filtering

引用

SICE Journal of control, Measurement, and system Integration 2010年第4期3卷 266-271页

作者： Benjamas Panomruttanarug Kohji Higuchi Department of Control System and Instrumentation Engineering King Mongkuts University of Technology Thonburi Department of Electronic Engineering University of Electro-Communications

This paper presents an emulation of fuzzy logic control schemes for an autonomous parallel parking system in a backward maneuver. There are four infrared sensors sending the distance data to a microcontroller for generating an obstacle-free parking path. Two of them mounted on the front and rear wheels on the parking side are used as the inputs to the fuzzy rules to calculate a proper steering angle while backing. The other two attached to the front and rear ends serve for avoiding collision with other cars along the parking space. At the end of parking processes, the vehicle will be in line with other parked cars and positioned in the middle of the free space. Fuzzy rules are designed based upon a wall following process. Performance of the infrared sensors is improved using Kalman filtering. The design method needs extra information from ultrasonic sensors. Starting from modeling the ultrasonic sensor in 1-D state space forms, one makes use of the infrared sensor as a measurement to update the predicted values. Experimental results demonstrate the effectiveness of sensor improvement.

关键词： parallel parking fuzzy logic wall following Kalman filtering

来源：评论

学校读者我要写书评

暂无评论

Vessel segmentation in retinal images using graph-theoretical vessel tracking

Vessel segmentation in retinal images using graph-theoretica...

引用

12th IAPR Conference on Machine Vision Applications, MVA 2011

作者： Rattathanapad, Suthit Uyyanonvara, Bunyarit Mittrapiyanuruk, Pradit Kaewtrakulpong, Pakorn Department of ICT Sirindhorn International Institute of Technology Thammasat University Thailand Department of Mathematics SrinakharinWirot University Thailand Department of Instrumentation and Control System Engineering King Mongkut's University of Technology Thonburi Thailand

ISBN: (纸本)9784901122115

This paper presents a method for automatic segmentation of blood vessels in retinal images. The method is based on vessel tracking technique. The key idea of the method is that first a set of seed points (center of vessel cross sections) is extracted. Then, the seed points are connected to establish the vessel skeleton. Finally, the false vessel point are rejected by resorting to a hypothesis-verificaton based procedure. The major contribution of this work is that we formulate the step of seed point connection in the form of graph-theoretical shortest path problem. Then we apply the Dijkstra's algorithm to solve the problem. The performance of our method evaluated on the publicly available DRIVE database shows promising results.

关键词： Blood vessels

来源：评论

学校读者我要写书评

暂无评论

Design of a Gough-Stewart platform for micro-surgical operations

Design of a Gough-Stewart platform for micro-surgical operat...

引用

2011 IEEE/SICE International Symposium on system Integration, SII 2011

作者： Kim, Sung Mok Lim, Hoon Cheong, Joono Yi, Byung Ju Kim, Whee Kuk Korea University Chochiwon Korea Republic of Hanyang University Ansan Korea Republic of Department of Control and Instrumentation Engineering Korea University Chochiwon Korea Republic of Department of Electronics System Engineering Hanyang University Ansan Korea Republic of

ISBN: (纸本)9781457715235

In general, optimal design for the mechanism such as Gough-Stewart Platform (GSP) does not take into account practical factors of the mechanism such as its component weight and size, and mechanical interferences among them, etc. Particularly, in designing a robot module for micro-surgical operations which would be mounted at the end of a macro manipulator, its light weight, compactness, as well as good kinematic performance are important design aspects that should be considered. In this paper, design of a compact GSP module incorporating additional practical design factors such as mechanical interferences among mechanism components is discussed. A modified design for micro-surgical operations which requires a small operation region represented as a nominal operation point is suggested and it is shown that its performance exceeds one of the typical GSP design under the given practical component limitations such as actual length of active prismatic joints. © 2011 IEEE.

关键词： Mechanisms

来源：评论

学校读者我要写书评

暂无评论

Ultrasonic inspection system for detecting small flaws at far surface of steel plate

Ultrasonic inspection system for detecting small flaws at fa...

引用

7th Annual International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Vilasmongkolchai, T. Noipitak, M. Kaewtrakulpong, P. Prateepasen, A. Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Thungkru Bangkok 10140 Thailand Department of Production Engineering King Mongkut's University of Technology Thonburi Thungkru Bangkok 10140 Thailand

ISBN: (纸本)9789746724913

This paper presents the development of inspection system using ultrasonic for steel plate manufacturing. Generally, internal defects in the final product of steel plate are inspected manually by human operators, which is a time consuming process. In this research, the crystal of an ultrasonic probe at natural frequency suitable for steel plate examination was developed. In our design, high sensitivity (i.e. high signal peak amplitude) and good resolution were achieved using a (water coupling) probe structure, without ceramic wear plate, and a signal processing called the 1-bit technique. Backing material of the probe was carefully designed and experimented to obtain proper impedance matching with the probe's crystal by varying its material composition. Jig with a dual-probe support to speed up the inspection of a steel plate was implemented. Moreover, the 1-bit technique was applied to improve resolution of the inspection and to detect small flaws close to the far surface of the steel plate. The developed probe has more sensitivity than that of commercial probes in terms of frequency response. The 1-bit processing technique has been realized and simulated and it showed advantages over the conventional method for processing time and accuracy.

关键词： Probes

来源：评论

学校读者我要写书评

暂无评论

Simple on-line observation and compensation of dead-time effects

Simple on-line observation and compensation of dead-time eff...

引用

14th International Conference on Railway engineering Design and Optimization, COMPRAIL 2014

作者： Jung, S.M. Park, C.B. Kim, J.H. Lee, S.H. Kim, H.W. Advanced Traction and Noncontact Feeding System Research Team Korea Railroad Research Institute Korea Republic of Department of Control and Instrumentation Engineering Korea National University of Transportation Korea Republic of

ISBN: (纸本)9781845647667

Generally, there exist voltage differences between the voltage commands and the output voltages of the three-phase pulse-width modulated (PWM) voltage-source inverter (VSI), which are caused by the intended dead-time to prevent the armshort of a leg and the nonlinearities of switching devices. These voltage differences (or voltage distortion) affect the current distortion, torque pulsations, and degradation of control performances. To overcome these drawbacks, a simple and low-cost observation and compensation method of the voltage distortion is proposed. The proposed method is employing model reference adaptive system (MRAS) techniques and does not require any additional hardware circuits such as voltage sensors. The voltage distortions caused by the nonlinearities of the switching devices are estimated by a voltage distortion observer which is based on the electrical model of the PMSM. And the estimated voltage distortions are fed-forward to compensate the voltage commands. In comparison with the previous existing methods, the proposed method has a simple structure and good performances. Also, it can be implemented without any extra devices such as voltage sensors and the computing effort is very small. The execution of the algorithm can be easily embedded in the existing systems without major modification. To show the effectiveness of the proposed method, the experiments are carried out for the digitally controlled PMSM drive system. The experimental results verify the validity of the proposed method and show that the proposed method gives good performance and practical value. © 2014 WIT Press.

关键词： Electric inverters

来源：评论

学校读者我要写书评

暂无评论

Modern development of low cost RT industrial process control based on matlab-simulink and PAC

Modern development of low cost RT industrial process control...

引用

作者： Tutsch, Michal Konarik, Petr Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VSB - Teclmical University of Ostrava Ostrava Czech Republic Department of Control System and Instrumentation Faculty of Mechanical Engineering VSB - Teclmical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424473359

The paper presents modern advanced development methods of control systems that minimizes the cost of development of applications which are widely applicable in industrial control of whole range of processes. Unlike the classical way of design and testing control algorithms which are based on expensive RT measurement cards or dSpace, this solution is based on industrial controllers WinPLC/WinPAC. This enables so called rapid-prototyping of control algorithms directly from Matlab-Simulink into target platform. It was used muItiplatform control system REX as a bridge between Matlab and the target platform. The paper describes whole design of control algorithms and control schemes, simulation of prepared schemes, uploading control schemes into target platform of WinPLC. Also possibilities of remote data transfer and data storage are mentioned. The real measurement on hydraulic industrial system proved its limits that were also explained in this paper.

关键词： Simulink

来源：评论

学校读者我要写书评

暂无评论

A High Speed Autofocusing system for Micro system Applications

引用

电子科学学刊（英文版） 2016年第1期14卷 73-79页

作者： Phuchong Sripolsaen Pradit Mittrapiyanuruk Pakorn Keawtrakulpong the Deptartment of Control System and Instrumentation Engineering Faculty of Engineering King Mongkut’s University of Technology Thonburi KMUTT Bangkok 10140 Thailand the Department of Mathematics Faculty of Science Srinakharinwirot University Bangkok 10110 Thailand the Department of Control System and Instrumentation Engineering Faculty of Engineering KMUTT Bangkok 10140 Thailand

来源：评论

学校读者我要写书评

暂无评论

Adversarially Robust Reinforcement Learning for Urban Traffic Signal control 5

Adversarially Robust Reinforcement Learning for Urban Traffi...

引用

5th IEEE International Conference on Technology, Informatics, Management, engineering and Environment, TIME-E 2024

作者： Hamzah, Muhammad Shafly Joelianto, Endra Sutarto, Herman Yoseph Putri, Adiyana Institut Teknologi Bandung Instrumentation and Control Master Program Bandung Indonesia Institut Teknologi Bandung Instrumentation Control and Automation Research Group Bandung Indonesia PT. Pusat Riset Energi Department of Intelligent System Bandung Indonesia Institut Teknologi Bandung Doctoral Program of Engineering Physics Bandung Indonesia

ISBN: (纸本)9798350364743

Urban traffic congestion presents critical challenges, resulting in delays, environmental pollution, and significant economic costs. While traditional traffic control methods, such as fixed-time and adaptive systems, have been widely implemented, they often fail in unpredictable conditions, particularly when confronted with noisy or inaccurate data. This research proposes a robust reinforcement learning (RL) solution for traffic signal control using the RADIAL-DQN (Robust Adversarial Loss DQN) algorithm. Integrating adversarial training enhances the system's robustness to real-world uncertainties. Evaluations conducted using a SUMO traffic simulation show that the robust agent produced an increase of only 60.71% in queue length under a projected gradient descent (PGD) adversarial attack, outperforming standard RL agents, which experienced an 89% increase. These results demonstrate the potential of robust RL to improve both the reliability and scalability of urban traffic control systems. © 2024 IEEE.

关键词： Traffic signals

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：