检索结果-内蒙古大学图书馆

Operator Error Based Design of Position controllers for Dynamically Slow Systems

IFAC Proceedings Volumes 2013年第5期46卷 517-522页

作者： Mark D. Elton Wayne J. Book HUSCO International Waukesha WI USA 53189 USA (Tel: 404-385-1882 Georgia Institute of Technology Atlanta GA 30332 USA (Tel: 404-894-3247)

Previous work has found that performance with position control exceeds that with rate control except for dynamically slow systems, such as hydraulic machines. In an effort to extend the intuitiveness of position control to these systems, a novel human-machine interface was applied to a dynamically slow system. This paper analyzes the cost in time and in control effort of the errors operators made while controlling the position of a dynamically slow system. From this analysis, two “smoothing” position controllers were designed and tested on the same system. The first controller, the best fit controller , showed significant improvement for tracking tasks and maintained the near optimal performance of the full state feedback position controller on point-to-point motion tasks. The second controller, the time elimination controller , showed statistically similar performance on all of the tasks to the full state feedback position controller.

关键词： Human-machine interface control algorithms position control human error

来源：评论

学校读者我要写书评

暂无评论

control strategies for harmonic mitigation and power factor correction using shunt active filter under various source voltage conditions

引用

INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 2012年第1期42卷 661-671页

作者： Zaveri, Naimish Chudasama, Ajitsinh SV Natl Inst Technol Dept Elect Engn Surat Gujarat India MS Univ Fac Technol Dept Elect Engn Baroda Gujarat India

This paper gives a new insight into the concept of load compensation using shunt active filter (SAF) under ideal and non-ideal source voltage conditions. A novel approach based on an improved instantaneous active and reactive current component method is proposed. The performance of the proposed control strategy has been compared with instantaneous reactive power theory, symmetrical component theory and dq theory. SAF has been realized by three-phase voltage source converter. Reference currents generated by control strategies has been tracked by a SAF in a hysteresis band control scheme. The performance of the proposed scheme is evaluated in terms of reactive power compensation, reduction in magnitude of source currents, compensator currents, and harmonic compensation as per IEEE-519 standard. To ascertain the viability of the proposed control algorithm, the performance is evaluated under different source voltage conditions with the IEEE Standard-1459 power definitions. Variation in magnitude as well as harmonic content of source voltage has been considered. Under balanced sinusoidal source voltage condition, all control strategies congregate to similar results. Under unbalanced sinusoidal source voltage condition, dq theory and proposed theory have shown similar performance. However, under distorted source voltage conditions, an improved instantaneous active and reactive current component theory presents superior performance. A three-phase, three-wire distribution system supplying non-linear load is considered for simulation study. Simulation results from a complete model of SAF are presented to validate and compare the control strategies. (c) 2012 Elsevier Ltd. All rights reserved.

关键词： Shunt active filter control algorithms Non-ideal source voltage Unity power factor Source apparent power reduction THU

来源：评论

学校读者我要写书评

暂无评论

Active Seat Suspension with Two Degrees of Freedom for Military Vehicles

引用

IFAC Proceedings Volumes 2013年第5期46卷 523-529页

作者： Rudiger Kieneke Christian Graf Jürgen Maas Ostwestfalen-Lippe University of Applied Sciences Control Engineering and Mechatronics 32756 Lemgo Germany

The following contribution describes the design and validation of an active seat suspension with two translational degrees of freedom. This seat suspension system is designed to be integrated in various military vehicles to reduce the mechanical vibrations caused by test runs on synthetic test tracks, which affect the human health and condition confidence. The proposed active seat suspension is specially designed to support the drivers during the test drives. In a first step the model of the seat and the driver are derived considering the motions in vertical and lateral direction. To suppress the vibrations a control strategy is presented in a further step. The vibration controller is designed for a 1 DOF model based on a hybrid Skyhook- and Groundhook-Principle and in alternative as a feedforward control using an ideal model for the seat and driver. Finally, the realized active seat suspension is integrated in a military vehicle to prove the amount of vibration suppression in comparison to a common passive seat by road test on synthetic tracks emphasing an improvement of the drivers well-being.

关键词： Modelling Seat Suspension Actuators control algorithms Parametrization

来源：评论

学校读者我要写书评

暂无评论

Development of a Terminal control System with Variable Minimum Airflow Rate

引用

ENERGIES 2012年第11期5卷 4643-4664页

作者： Cho, Young-Hum Kumoh Natl Inst Technol Sch Architecture Gumi 730701 Gyeongbuk South Korea

A constant minimum airflow rate is used in conventional Single Duct Variable Air Volume Terminal Box control sequences. This control sequence can cause occupant discomfort or use excessive energy under partial load conditions. If the minimum airflow rate is higher than required;terminal boxes will have significantly more simultaneous heating and cooling;and AHUs will consume more fan power. Buildings will have indoor air quality problems if the minimum airflow rate is less than required. Many engineers and researchers have investigated advanced variable air volume terminal box control algorithms without a system retrofit for thermal comfort;indoor air quality and energy savings. In this study a developed control system with variable minimum airflow rate for Single Duct Variable Air Volume Terminal Boxes was applied and validated using an actual building and evaluated for comfort;indoor air quality and energy consumption. The energy consumption and thermal performance of terminal boxes using the conventional and proposed control algorithms were compared.

关键词： terminal control system variable minimum airflow rate energy consumption thermal performance control algorithms

来源：评论

学校读者我要写书评

暂无评论

H_∞ control OF DISCRETE-TIME LINEAR SYSTEMS CONSTRAINED IN STATE BY EQUALITY CONSTRAINTS

引用

INTERNATIONAL JOURNAL OF APPLIED MATHEMATICS AND COMPUTER SCIENCE 2012年第3期22卷 551-560页

作者： Filasova, Anna Krokavec, Dusan Tech Univ Kosice Dept Cybernet & Artificial Intelligence Kosice 04200 Slovakia

In this paper, stabilizing problems in control design are addressed for linear discrete-time systems, reflecting equality constraints tying together some state variables. Based on an enhanced representation of the bounded real lemma for discrete-time systems, the existence of a state feedback control for such conditioned stabilization is proven, and an LMI-based design procedure is provided. The control law gain computation method used circumvents generally an ill-conditioned singular design task. The principle, when compared with previously published results, indicates that the proposed method outperforms the existing approaches, guarantees feasibility, and improves the steady-state accuracy of the control. Furthermore, better performance is achieved with essentially reduced design effort. The approach is illustrated on simulation examples, where the validity of the proposed method is demonstrated using one state equality constraint.

关键词： equality constraints discrete-time systems linear matrix inequality state feedback control algorithms quadratic stability singular systems

来源：评论

学校读者我要写书评

暂无评论

Active and semi-active control of structures - theory and applications: A review of recent advances

引用

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 2012年第11期23卷 1181-1195页

作者： Casciati, Fabio Rodellar, Jose Yildirim, Umut Univ Pavia Dept Struct Mech I-27100 Pavia Italy Univ Politecn Cataluna Dept Appl Math 3 Barcelona Spain

It is internationally recognized that structural control was introduced in civil engineering through a pioneering article by Yao and through the implementations promoted by Kobori. The concepts of active and semi-active structural control in civil and infrastructure engineering date back 40 years and much progress has been recorded during these four decades. Periodically, state-of-the-art manuscripts have been published and technical books were also printed to testify the maturation of the topic. This article only covers the period from the second semester of 2009 to the first semester of 2011, emphasizing the developments in terms of theoretical, numerical and experimental studies, as well as the use of control algorithms and devices in actual implementations. It is observed that there are still several operational limitations to prevent from the expected growth of the applications in standard design. Nevertheless, some innovative concepts help to foresee future developments within special sectors of applications.

关键词： active control control algorithms intelligent systems laboratory testing semi-active control structural control

来源：评论

学校读者我要写书评

暂无评论

Model Based control for a Selective Catalytic Reduction (SCR) System in an Exhaust Gas Aftertreatment System for a Diesel Engine

Model Based Control for a Selective Catalytic Reduction (SCR...

引用

International Conference on Energy Efficient Technologies for Sustainability

作者： Waseem A. Rasheed Parul Goyal Cyril Joseph Dept of Instrumentation & Control Manipal Institute of Technology KPIT Cummins Infosystem Ltd

ISBN: (纸本)9781467361491

The application of Selective Catalytic Reduction (SCR) in Automobiles makes the system complex, while trying to meet the stringent Emission norms, especially in mobile heavy-duty diesel applications. As EURO VI emission standards are on the line, these strict specifications and the dynamic behavior of automobiles demands advanced control system design. Such a control system design requires a model based control approach. In this paper, we incorporates a model-based Feed-Forward controller (FFC) which handles the known dynamics of the plant along with a Feed-Back controller (FBC) to mitigate the effects caused by disturbances and slowly varying parameters.

关键词： Diesel Engine Exhaust Gas After-treatment system Selective Catalytic Reduction System Modeling control algorithms

来源：评论

学校读者我要写书评

暂无评论

Regenerative Power Converters Representation of Grid control and Actuation Emulator

Regenerative Power Converters Representation of Grid Control...

引用

IEEE Energy Conversion Congress and Exposition (ECCE)

作者： Wang, Jing Yang, Liu Ma, Yiwei Shi, Xiaojie Zhang, Xiaohu Hang, Lijun Lin, Keman Tolbert, Leon M. Wang, Fred Tomsovic, Kevin Univ Tennessee Ctr Ultra Wide Area Resilient Elect Energy Transm Knoxville TN 37996 USA

ISBN: (纸本)9781467308014

An ultra-wide-area transmission network emulator represented by regenerative converters is developed in this paper. The converters are paralleled to provide and share power similar to electromechanical generators. Others are controlled to emulate loads, such as, induction motors and constant impedance, current, power (ZIP) loads. The structure and control algorithms of these power system component emulators are discussed in detail, and the performance of overall system architecture is presented. As is well-known, the induction motor will induce large power perturbation when it starts. The simulation results clearly show the dynamic response and starting up process of the load.

关键词： Hardware testbed regenerative converter ultra-wide-area transmission emulator power electronic load control algorithms dynamic performance

来源：评论

学校读者我要写书评

暂无评论

A Novel Speed Sensorless control of Brushless DC Motor in Position Servo System

A Novel Speed Sensorless Control of Brushless DC Motor in Po...

引用

International Conference on Manufacturing Science and Technology (ICMST 2011)

作者： Chen, Changchun Wei, Jiadan Zhou, Bo Li, Guosheng Nanjing Univ Aeronaut & Astronaut Lab Aeronaut Power Syst Nanjing 210016 Peoples R China

ISBN: (纸本)9783037852958

Zero crossing points of back-electromotive force (EMF) is the most mature and widely used method of the speed sensorless control of brushless DC motor (BLDCM). However, with the poor performance from standstill to low speed, it is not suitable for the position servo system. Therefore, this paper first analyzes several conventional speed sensorless control schemes in the BLDCM, then presents a novel control algorithms for the BLDCM. In the proposed method, the short pulse sensing method for the rotor position in the start-up process and self-synchronization with zero cross points of back-EMF are combined together. As a result, the BLDCM used in the position servo system can be easily controlled from zero to high speed, the theoretical analysis is verified by the simulation results based on Matlab, it shows that the proposed algorithms can improve the performances of position servo system compared with the conventional methods.

关键词： Sensorless Brushless DC motor Start-up process Position servo system control algorithms

来源：评论

学校读者我要写书评

暂无评论

Mixed-Signal SoCs With In Situ Self-Healing Circuitry

引用

IEEE DESIGN & TEST OF COMPUTERS 2012年第6期29卷 27-39页

作者： Maxey, Christopher Raman, Sanjay Groves, Kari Quach, Tony Orlando, Len Mattamana, Aji Creech, Gregory Rockway, Jay USAF Res Lab Wright Patterson AFB OH USA Ohio State Univ Columbus OH 43210 USA

This article discusses the goals and recent achievements of the HEALICs program. The program's aim is to enhance wireless systems with sensors, actuators, and mixed-signal control loops in order to improve their p... 详细信息

关键词： System On A Chip Radio Frequency Transistors Wireless Communication CMOS Integrated Circuits Digital Systems Transceivers Yield Enhancement Built In Test control algorithms RF Mixed Signal Circuit Design Self Healing

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：