检索结果-内蒙古大学图书馆

Pose overshoot analysis of the marine spherical double plugging in twisting process

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT 2018年第2期232卷 245-252页

作者： Wang, Wenming Liu, Xu Wang, Hao Fan, Jinchao Zhu, Xiaoxiao China Univ Petr Coll Mech & Transportat Engn 18 Fuxue Rd Beijing 102249 Peoples R China

Marine spherical double plugging is a novel plugging device, which can achieve the initiative plugging in the oil and gas pipeline. In order to ensure that the plugging head will not collide with the pipeline wall and not be scratched by the drill cuttings, the analysis of twisting process is necessary to assure reliable operation. In this article, we designed the overall scheme of marine spherical double plugging and established the mathematic model of spherical double plugging. Through studying the twisting algorithm of plugging head and trajectory algorithm of plugging head contour, four dangerous points were obtained. The multi-body dynamic of the structure was built using ADAMS, and the twisting process and motion analysis of four points were analyzed. The twisting error of the plugging head between the four points and the inner wall of the pipeline was analyzed in overshoot states to obtain the maximum allowable overshoot of inserting hydraulic cylinder and twisting hydraulic cylinder. Simulation results show that overshoot of inserting hydraulic cylinder needs to be controlled within 11.5mm and overshoot of twisting hydraulic cylinder needs to be controlled within 5.3mm to avoid the unpredictable danger. This article will provide theoretical and technical support for the optimization design of control system and the plugging head.

关键词： Marine spherical double plugging twisting algorithm trajectory algorithm pose overshoot

来源：评论

学校读者我要写书评

暂无评论

Design of Second Order Sliding Mode and Sliding Mode algorithms:A Practical Insight to DC-DC Buck Converter

引用

IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 483-497页

作者： Seyed Mehdi RakhtAla Monazzahalsadat Yasoubi Hassan HosseinNia Department of Electrical Engineering Golestan University Department of Electrical and Computer Engineering Concordia University Department of Precision and Microsystem Engineering Delft University of Technology

This paper presents a simple and systematic approach to design second order sliding mode controller for buck *** second order sliding mode control(SOSMC)based on twisting algorithm has been implemented to control buck switch mode *** idea behind this strategy is to suppress chattering and maintain robustness and finite time convergence properties of the output voltage error to the equilibrium point under the load variations and parametric *** addition,the influence of the twisting algorithm on the performance of closed-loop system is investigated and compared with other algorithms of first order sliding mode control such as adaptive sliding mode control(ASMC),nonsingular terminal sliding mode control(NTSMC).In comparative evaluation,the transient response of the output voltage with the step change in the load and the start-up response of the output voltage with the step change in the input voltage of buck converter were *** results were obtained from a hardware setup constructed in ***,for all of the surveyed control methods,the theoretical considerations,numerical simulations,and experimental measurements from a laboratory prototype are compared for different operating *** is shown that the proposed twisting method presents an improvement in steady state error and settling time of output voltage during load changes.

关键词： DC-DC buck converter non-singular-terminal sliding mode second order sliding mode twisting algorithm

来源：评论

学校读者我要写书评

暂无评论

Study of the nonlinear control techniques for single acting VGT pneumatic actuator

引用

INTERNATIONAL JOURNAL OF VEHICLE DESIGN 2012年第3-4期60卷 264-285页

作者： Laghrouche, S. Mehmood, A. El Bagdouri, M. Univ Technol Belfort Montbeliard Lab SET Belfort France

In this paper, we have developed a detailed mathematical model of a pneumatic actuator for a Variable Geometry Turbocharger (VGT) equipped with an Electro-pneumatic Pressure Converter (EPC). This model may require complex calculations for control purpose;therefore the dynamics of the EPC have been neglected and replaced by a static gain. These models incorporate friction and aerodynamic force related effects by using adaptive LuGre model. To compensate for parametric uncertainties, two single-input single-output nonlinear position control laws are designed using the second order sliding mode (SMC) and backstepping control. A comparative study with experiments shows the effectiveness of the proposed controllers.

关键词： modelling adaptive LuGre model sliding mode control twisting algorithm backstepping control

来源：评论

学校读者我要写书评

暂无评论

Second-order sliding mode control of wind turbines to enhance the fault-ride through capability under unbalanced grid faults

引用

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 2021年第7期49卷 1959-1986页

作者： Tahir, Khalfallah Allaoui, Tayeb Denai, Mouloud Mekhilef, Saad Belfedal, Cheikh Doumi, M'hamed Sch Elect & Energet Engn Oran Dept Elect Engn Oran Algeria Ibn Khaldoun Univ Dept Elect Engn Lab L2GEGI Tiaret Algeria Univ Hertfordshire Sch Engn & Comp Sci Hatfield Herts England Univ Malaya Dept Elect Engn Power Elect & Renewable Energy Res Lab PEARL Kuala Lumpur Malaysia Bechar Univ Dept Elect Engn CAOSEE Lab Bechar Algeria

The integration of wind generation to the grid is growing rapidly across the world. As a result, grid operators have introduced the so-called grid codes (GC), which nowadays include a range of technical conditions and requirements, which wind generators must fulfill. Among these, the low-voltage ride through (LVRT) is a requirement for wind turbines to stay connected to the grid and continue to operate during the disturbance. In this study, a control structure, combining inertial kinetic energy storage with a crowbar circuit, is proposed to enhance the ride through capability of a wind turbine generator (WTG) based on a wound-field synchronous generator (WFSG) under unsymmetrical voltage dips. For the grid-side converter (GSC), a decoupled double synchronous reference frame (DDSRF) d-q current controller is used. Furthermore, a second-order sliding mode controller (SOSMC) with super-twisting (ST) algorithm is proposed for the GSC and the machine-side converter (MSC) to improve the response speed and achieve an accurate regulation of the dq-axis current components simultaneously. The main objectives of the GSC are to achieve a balanced, sinusoidal current and smooth the real and reactive powers to reduce the influence of the negative-sequence voltage. A series of simulations are presented to demonstrate the effectiveness of the proposed control scheme in improving the LVRT capability of the WFSG-driven wind turbine and the power quality of the system under unbalanced grid voltage conditions.

关键词： decoupled double synchronous reference frame low‐ voltage ride through second‐ order sliding mode controller super‐ twisting algorithm wind turbine wound‐ field synchronous generator

来源：评论

学校读者我要写书评

暂无评论

Design of a Novel Boomerang Trajectory for Sliding Mode Controller

引用

INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS 2020年第11期18卷 2917-2928页

作者： Kamalesh, M. S. Senthilnathan, Nattuthurai Bharatiraja, Chokkalingam Kongu Engn Coll Sch Elect Sci Perundurai Tamil Nadu India SRM Inst Sci & Technol Dept Elect & Elect Engn Chennai Tamil Nadu India

Sliding Mode Controllers (SMC) is widely known for its robustness and controllability for a non-linear system during transient conditions. The main advantage of SMC is that of sliding a control variable along the trajectory and converges to zero or nearest to zero and make the system to attain a stable condition. Various methodologies and approaches like discontinuous controllers, second-order sliding modes, twisting algorithms, etc. are available for the SMC implementation. However, every algorithm is facing the problem of convergence and error tracking in a finite amount of time. The primary purpose of this paper is to formulate and design an SMC with a new trajectory which overcomes the drawback of the existing methodologies. This paper proposes a novel boomerang trajectory, which omits the reaching phase and follows a semi-elliptical and semi-circular path for a quick convergence. SMC with boomerang trajectory is analyzed for its stability at transient conditions, and the results show significant improvement in terms of convergence time when compared to the existing trajectories and also it is asymptotically stable. The entire system is simulated in Matlab / Simulink and the same prototypical setup has been designed, and implemented for evaluation purpose using dSPACE-MicroLabBox-ACE-DS1202 platform.

关键词： Boomerang trajectory non-linear system sliding mode control trajectory control twisting algorithm

来源：评论

学校读者我要写书评

暂无评论

Control of a Parametrically Excited Crane: A Vector Lyapunov Approach

引用

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY 2013年第6期21卷 2332-2340页

作者： Vazquez, Carlos Collado, Joaquin Fridman, Leonid Univ Nacl Autonoma Mexico Fac Engn Dept Control Engn & Robot Mexico City 04510 DF Mexico CINVESTAV IPN Dept Automat Control Mexico City 07360 DF Mexico

In this brief, a controller is proposed in order to avoid the parametric resonance effect and to attenuate the load oscillations in a parametrically excited crane, ensuring precise load transfer during the load movement despite model uncertainties and un-modeled dynamic actuators. The nonlinear controller proposed in this brief is motivated by the twisting algorithm and the design uses the vector Lyapunov function approach ensuring the ultimate bounded stability of the overall closed-loop system. The experiments conducted over a laboratory platform resemble quite well the simulations, confirming the obtained results.

关键词： Parametric resonance ship onboard crane twisting algorithm under-actuated systems vector Lyapunov functions

来源：评论

学校读者我要写书评

暂无评论

A Minimum Operator-Based Discrete-Time Sliding Mode Control

引用

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 2024年第11期69卷 7871-7876页

作者： Prasun, Parijat Kamal, Shyam Pandey, Sunidhi Bartoszewicz, Andrzej Ghosh, Sandip Indian Inst Technol BHU Dept Elect Engn Varanasi 221005 India Lodz Univ Technol Inst Automat Control PL-90537 Lodz Poland

In this article, a minimum operator-based law for discrete-time sliding mode control is proposed, which stands between the Gao's reaching law and Utkin's reaching law, alleviating the limitations of both types, i.e., primarily chattering in the former and overly large control action in the latter case. The minimum operator-based discrete-time sliding mode control is designed for first-order and second-order perturbed systems. Further, a minimum operator-based twisting-like algorithm is developed, which ensures the band free convergence of the system states in finite time. Simulation results show the efficacy of the proposed methodology.

关键词： Switches Vectors Sliding mode control Closed loop systems Discrete-time systems Dynamical systems Transforms Discrete sliding mode control (SMC) minimum operator reaching law approach twisting algorithm

来源：评论

学校读者我要写书评

暂无评论

Implicit-Euler based digital implementation for constrained stabilization of second-order systems

引用

INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL 2021年第11期31卷 5086-5100页

作者： Xiong, Xiaogang Sachan, Ankit Huang, Ruining Kumar Pal, Anil Kamal, Shyam Chen, Wei Harbin Inst Technol Sch Mech Engn & Automat Shenzhen Peoples R China Hiroshima Univ Grad Sch Adv Sci & Engn Hiroshima Japan Indian Inst Technol BHU Dept Elect Engn Varanasi Uttar Pradesh India Chinese Acad Sci Shenzhen Inst Adv Technol Shenzhen Peoples R China

In this article, an implicit Euler algorithm for digital implementation of constrained stabilization is studied for the second-order systems. For that, a switching controller is designed in a discrete-time framework such that the system's position output converges to some predefined range, that is, rho is an element of (-epsilon, epsilon) in finite-time while the velocity output converges to the origin, that is, rho=0, in finite-time. The switching controller is switched to the implicit Euler implementation of twisting algorithm when rho is not an element of (-epsilon, epsilon) and to an implicit Euler implementation of first-order sliding mode control when rho is an element of (-epsilon, epsilon). The combination of the two implicit Euler implementations achieves discrete-time constrained stabilization of second-order systems, avoiding the chattering caused by conventional explicit integration schemes. The usefulness of the proposed algorithm for constrained stabilization is illustrated by considering the container-slosh coupled dynamical system.

关键词： constrained stabilization implicit‐ Euler discretization projection function twisting algorithm

来源：评论

学校读者我要写书评

暂无评论

Performance evaluation of iterative learning control with different sliding mode algorithms for the slip-ratio control of an electric vehicle

引用

INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL 2023年第10期33卷 5388-5403页

作者： Denny, C. Dimna Kumar, P. Ramesh APJ Abdul Kalam Technol Univ Dept Elect Engn GEC Thrissur Trichur Kerala India APJ Abdul Kalam Technol Univ Dept Elect Engn GEC Wayanad Wayanad Kerala India

Developing a control strategy that can handle model uncertainties, external disturbances, and parameter fluctuations is essential for the desired operation of a nonlinear system. An attempt is made to develop such a control algorithm using the Learning Variable Structure Control technique. The proposed controllers have the advantages of both iterative learning control (ILC) and sliding mode control (SMC) such that they can compensate both structured and unstructured uncertainties. They are made comprised of modified-twisting algorithm and super-twisting algorithm respectively with the ILC technique. In this article, the performance of the two developed controllers is compared to a traditional SMC-based ILC approach. Based on simulation results, the super-twisting algorithm based ILC is found to be superior with reference to speed of convergence and tracking accuracy. This method is used to control the slip-ratio of an electric vehicle as a specific application in this paper.

关键词： electric vehicle iterative learning control sliding mode control slip-ratio control super-twisting algorithm twisting algorithm

来源：评论

学校读者我要写书评

暂无评论

Smooth integral sliding mode controller for the position control of Stewart platform

引用

ISA TRANSACTIONS 2015年 58卷 543-551页

作者： Kumar, Ramesh P. Chalanga, Asif Bandyopadhyay, B. Indian Inst Technol Interdisciplinary Programme Syst & Control Engn Bombay 400076 Maharashtra India

This paper proposes the application of a new algorithm for the position control of a Stewart platform. The conventional integral sliding mode controller is a combination of nominal control and discontinuous feedback control hence the overall control is discontinuous in nature. The discontinuity in the feedback control is undesirable for practical applications due to chattering which causes the wear and tear of the mechanical actuators. In this paper the existing integral sliding mode control law for systems with matched disturbances is modified by replacing the discontinuous part by a continuous modified twisting control. This proposed controller is continuous in nature due to the combinations of two continuous controls. The desired position of the platform has been achieved using the proposed controller even in the presence of matched disturbances. The effectiveness of the proposed controller has been proved with the simulation results. (C) 2015 ISA. Published by Elsevier Ltd. All rights, reserved.

关键词： Stewart platform Super twisting observer twisting algorithm Integral sliding mode control

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：