检索结果-内蒙古大学图书馆

A Flexible control Strategy for Multi-Functional PV Inverters with Load Compensation Capabilities Considering Current Limitations and Unbalanced Load Conditions

引用

ENERGIES 2024年第17期17卷 4218页

作者： Osorio, Fausto Mantilla, Maria A. Rey, Juan M. Petit, Johann F. Univ Ind Santander Escuela Ingn Electr Elect & Telecomunicac Bucaramanga 680002 Colombia

Multi-functional photovoltaic (PV) inverters incorporate ancillary services to enhance power quality and mitigate stability issues in distribution networks. These next-generation PV inverters will achieve a higher utilization of the inverter's rated capacity, improving the cost-effectiveness of PV technology. However, the power required to perform ancillary services, such as load compensation capabilities, could exceed the inverter's capacity, risking the components' integrity. Therefore, multi-functional control algorithms must limit the power capacity according to the system's nominal currents. Despite this, most control proposals do not address this issue when load balancing capabilities are included for PV inverter control. This paper proposes a flexible control strategy for three-phase multi-functional PV inverters, considering load balancing functionalities while keeping the inverter currents within safe operating limits. The proposal introduces two control parameters whose variation results in different load compensation capabilities. These parameters can be adapted dynamically according to the inverter rated capacity not used for active power injection and the load compensation requirements. Additionally, a control algorithm is proposed to limit the inverter current according to the nominal values supported by the device. This algorithm also allows setting compensation objectives following a priority scheme in which the injection of the PV active power is prioritized over the load compensation functionalities. Reactive power compensation and load balancing functionalities are also considered at a lower level of hierarchical priority. The proposal was evaluated through experimental tests on a multi-functional PV inverter prototype under various operational conditions. The experimental results show an excellent control strategy performance, achieving the control objectives under unbalanced load conditions.

关键词： photovoltaic inverters power quality control algorithms reactive power compensation unbalanced loads load compensation

来源：评论

学校读者我要写书评

暂无评论

Closed-loop control systems for pumps used in portable analytical systems

引用

JOURNAL OF CHROMATOGRAPHY A 2023年 1695卷 463931页

作者： Naz, Suleman A. Huynh, Van Thanh Doeven, Egan H. Adams, Scott Kouzani, Abbas Guijt, Rosanne M. Deakin Univ Ctr Rural & Reg Futures Locked Bag 20000 Geelong Vic 3320 Australia Deakin Univ Sch Engn Locked Bag 20000 Geelong Vic 3320 Australia Deakin Univ Sch Life & Environm Sci Locked Bag 20000 Geelong Vic 3320 Australia

The demand for accurate control of the flowrate/pressure in chemical analytical systems has given rise to the adoption of mechatronic approaches in analytical instruments. A mechatronic device is a synergistic system which combines mechanical, electronic, computer and control components. In the development of portable analytical devices, considering the instrument as a mechatronic system can be useful to miti-gate compromises made to decrease space, weight, or power consumption. Fluid handling is important for reliability, however, commonly utilized platforms such as syringe and peristaltic pumps are typically char-acterized by flow/pressure fluctuations and slow responses. Closed loop control systems have been used effectively to decrease the difference between desired and realized fluidic output. This review discusses the way control systems have been implemented for enhanced fluidic control, categorized by pump type. Advanced control strategies used to enhance the transient and the steady state responses are discussed, along with examples of their implementation in portable analytical systems. The review is concluded with the outlook that the challenge in adequately expressing the complexity and dynamics of the fluidic network as a mathematical model has yielded a trend towards the adoption of experimentally informed models and machine learning approaches.(c) 2023 Published by Elsevier B.V.

关键词： Fluid handling Portable analytical systems control algorithms Closed-Loop Performance Positive Displacement Pumps

来源：评论

学校读者我要写书评

暂无评论

MOTION control ANALYSIS OF A MOBILE ROBOT

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND control-TRANSACTIONS OF THE ASME 1987年第2期109卷 73-79页

作者： BORENSTEIN, J KOREN, Y UNIV MICHIGAN DEPT MECH ENGN & APPL MECH ANN ARBOR MI 48109 USA

A computer-controlled vehicle that is part of a mobile nursing robot system is described. The vehicle applies a motion control strategy that attempts to avoid slippage and minimize position errors. A cross-coupling control algorithm that guarantees a zero steady-state orientation error (assuming no slippage) is proposed and a stability analysis of the control system is presented. Results of experiments performed on a prototype vehicle verify the theoretical analysis.

关键词： Motion control Mobile robots Vehicles Errors Computers Steady state Theoretical analysis control algorithms Engineering prototypes Stability

来源：评论

学校读者我要写书评

暂无评论

Lyapunov Optimal Feedback control of a Nonlinear Inverted Pendulum

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND control-TRANSACTIONS OF THE ASME 1989年第4期111卷 554-558页

作者： Anderson, M. J. Grantham, W. J. Washington State Univ Dept Mech & Mat Engn Pullman WA 99164 USA

Lyapunov optimal feedback control is applied to a nonlinear inverted pendulum in which the control torque was constrained to be less than the nonlinear gravity torque in the model. This necessitates a control algorithm which "rocks" the pendulum out of its potential wells, in order to stabilize it at a unique vertical position. Simulation results indicate that a preliminary Lyapunov feedback controller can successfully overcome the nonlinearity and bring almost all trajectories to the target.

关键词： Feedback Pendulums Torque Gravity (Force) Wells control equipment Rocks Simulation results control algorithms

来源：评论

学校读者我要写书评

暂无评论

MODELING AND VALIDATION OF AUTOMOTIVE ENGINES FOR control ALGORITHM DEVELOPMENT

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND control-TRANSACTIONS OF THE ASME 1992年第2期114卷 278-285页

作者： MOSKWA, JJ HEDRICK, JK UNIV CALIF BERKELEY BERKELEYCA 94720

There is considerable interest in coordinated automotive engine/transmission control to smooth shifts, and for traction control of front wheel vehicles. This paper outlines a nonlinear dynamic engine model of a port fuel-injected engine, which can be used for control algorithm development. This engine model predicts the mean engine brake torque as a function of the engine controls (i.e., throttle angle, spark advance, fuel flow rate, and exhaust gas recirculation (E. G. R. ) flow rate). The model has been experimentally validated for a specific engine, and includes: . intake manifold dynamics, . fuel delivery dynamics, and . process delays inherent in the four-stroke engine. This model is used in real time within a control algorithm, and for system simulation. Also, it is flexible enough to represent a family of spark ignition automotive engines, given some test and/or simulation data for setting parameters.

关键词： Brakes Simulation control algorithms Ignition Traction Automotive engines Intake manifolds Flow (Dynamics) Delays Four-stroke engines Wheels Torque Fuels Exhaust gas recirculation Vehicles Dynamics (Mechanics) Modeling Engines

来源：评论

学校读者我要写书评

暂无评论

Technological Advancements in Oscillation Reduction for Propulsion Shaft Systems

引用

JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES 2024年第2 supplement期12卷 1779-1797页

作者： Sharma, Sunil Kumar Sharma, Rakesh Chandmal Mohapatra, Shruti Fouly, Ahmed Hossain, Ismail Lee, Jaesun Gati Shakti Vishwavidyalaya Sch Technol Vadodara 390004 India Tech Univ Dresden Inst Railway Vehicles & Railway Technol Friedrich List Fac Transport & Traff Sci D-01062 Dresden Germany Graph Era Deemed Be Univ Dept Mech Engn Dehra Dun 248002 Uttarakhand India Graph Era Hill Univ Dept Mech Engn Dehra Dun 248002 Uttarakhand India Sri Sri Univ Fac Agr Godisahi 754006 Odisha India King Saud Univ Dept Mech Engn Coll Engn POB 800 Riyadh 11451 Saudi Arabia Ural Fed Univ Dept Nucl & Renewable Energy Ekaterinburg 620002 Russia Changwon Natl Univ Sch Mech Engn Chang Won 51140 South Korea

Purpose This paper aims to integrate control systems to minimize vibration in rotating machinery, specifically focusing on propulsion shaft systems. The effectiveness of magnetorheological (MR) dampers in reducing vibration across various operational scenarios is assessed. Methods The research paper involves the development and validation of numerical models for both the propulsion shaft system and MR dampers, followed by experimental validations to verify model accuracy. These validated models are integrated to simulate controlled propulsion shaft systems equipped with MR dampers. A state-space formulation and Linear Quadratic Gaussian (LQG) control law are employed to devise a propulsion shaft system controller that coordinates the operation of MR dampers for vibration mitigation and improved dynamic performance. Results Simulation outcomes reveal notable decreases in vibration levels at varying rotational speeds, with higher speeds exhibiting more pronounced reductions. At lower speeds (50 rpm), vibration reduction indices show decreases of about 12.47% at 25 Hz and 18.75% at 175 Hz. At higher speeds (100 rpm and 150 rpm), substantial decreases in vibration levels are observed, with corresponding vibration reduction indices reaching 28.86% and 36.53%, respectively. Conclusion Frequency domain analysis highlights the enhanced dynamic performance achieved through control interventions. The study offers valuable insights for improving the efficiency and reliability of industrial machinery by demonstrating the efficacy of MR dampers in vibration reduction across various operational scenarios.

关键词： Vibration control Propulsion shaft systems Magnetorheological dampers Longitudinal vibrations control algorithms

来源：评论

学校读者我要写书评

暂无评论

Current controllers of Active Power Filter for Power Quality Improvement: A Technical Analysis

引用

AUTOMATIKA 2015年第1期56卷 42-54页

作者： Dey, Papan Mekhilef, Saad Univ Malaya Dept Elect Engn Power Elect & Renewable Energy Res Lab PEARL Kuala Lumpur 50603 Malaysia

Non-linear load deteriorates the quality of current waveforms at the point of common coupling of various consumers. Active power filter (APFs) is used to mitigate the most concern harmonic pollution in an electrical network. The controller part is the nucleus of an active power filter configuration. Active power filter performance is affected significantly by the selection of current control techniques. The active filter and its current control must have the capability to track sudden slope variations in the current reference to compensate the distorted current drawn by the voltage source inverter. Therefore, the choice and implementation of the current regulator is more important for the achievement of a satisfactory performance level. In this survey, technical reviews of various types of controllers covering a wide range have been presented. This work also reveals the advantages and disadvantages of the practiced control strategies. The effectiveness of the study will help the researchers to choose the proper control methods for various applications of active power filter.

关键词： Active power filters control algorithms Current controllers Comparison Harmonic currents Power quality Total harmonic distortion Root mean square (RMS) error

来源：评论

学校读者我要写书评

暂无评论

An Application of the µ-Synthesis to Launcher Attitude control Design

引用

IFAC Proceedings Volumes 2001年第15期34卷 123-128页

作者： Yasuhiro Morita Jun'ichiro Kawaguchi The Institute of Space and Astronautical Science (ISAS) 3-1-1 Yoshinodai Sagamihara Kanagawa 229-8510 JAPAN

The paper presents a methodology for applying the μ-synthesis to a real high order system: launch vehicle attitude control. The design involves robust characteristics against uncertainties of the system parameters as well as precise tracking performance under the limited rigidity. As the plant dynamics has an extremely high order and unstable character, the standard μ-synthesis cannot be directly applied, thus, the standard procedure is modified in a special way in order to make the approach more efficient. The methodology provided in the study will contribute to better understanding how to apply the robust control theory to complicated real problems.

关键词： Robust control Robust stability Robust performance control algorithms control applications Attitude control

来源：评论

学校读者我要写书评

暂无评论

A NEW TRACTION control ARCHITECTURE FOR PLANETARY EXPLORATION ROBOTS

引用

IFAC Proceedings Volumes 2006年第15期39卷 737-742页

作者： Daniele Caltabiano Giovanni Muscato DIEES – Università di Catania

Planetary exploration rovers are often redundantly actuated, for mechanical robustness and reliability purposes. This paper describes the Integral Redistribution Traction control Architecture (IR-TCA) applied to this category of robots. The Traction control Architecture of mobile robots is typically composed by independent decoupled PID speed controllers, one for each motor. In this paper it will be demonstrated that this solution is not suitable in redundantly actuated robots. The IR-TCA is a hierarchical cross-coupled controller, a simple variation to the PID architecture, easily scalable for more complex systems. The stability of this Traction control Architecture will also be demonstrated. Some comparative tests both with a simulator and a real platform will be presented to show the validity of this control architecture.

关键词： Traction control Mobile robots control algorithms controllers PID Stability analysis

来源：评论

学校读者我要写书评

暂无评论

COMPUTATIONAL DESIGN OF THE TWO-LEVEL control FOR THE SINGULARLY PERTURBED SYSTEM

引用

IFAC Proceedings Volumes 2007年第5期40卷 327-332页

作者： V.V. Alexandrov Maribel R. Reyes W. Fermin S. Guerrero Faculty of Physics and Mathematics Autonomous Univesity of Puebla Mexico

We present a new algorithm of the two-level control for a singularly perturbed system. If the mathematical model of the controllable dynamic system has a singular perturbation, it can be reduce with the help of hierarchical controls that can be obtained with Tikhonov's theorem. This is the stabilization of the adjoining system around an equilibrium point and to stabilize the desired movement through the use of a simplified system. In this paper, we present the application of the stabilization and the control algorithm of an aeronautics problem.

关键词： control algorithms Dynamic stability Stabilization

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：