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Rolling Force Adaptive Learning of Tandem Cold Rolling Mill Using PSO Algorithm

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Rolling Force Adaptive Learning of Tandem Cold Rolling Mill ...

第五届流体传动与控制国际会议

作者： Chen Dongning Jiang Wanlu~* college of mechanical engineering Yanshan university Qinhuangdao Hebei 066004 china

＜正＞In tandem cold rolling,rolling force is an important parameter to AGC（automatic Gauge Control） *** improve the precision of rolling force prediction,online self-adaption software is developed for a five-stand tandem cold rolling *** exponential smoothing method a rolling force self-adaption algorithm based on measured data is *** new rolling force model coefficient is made of the ratio of measured value and new setting value which is recalculated by other measured variables. As the main influencing factor of rolling force,the deformation resistance of strip material is recalculated and fit of parameter using particle swarm optimization *** the online self-adaption and self-learning,the model of rolling force has steady performance and high precision,and the rolling efficiency of tandem cold rolling mill is highly improved.

关键词： tandem cold rolling rolling force selfadaption particle swarm optimization

An Explicit Time-Varying Periodic Feedback Control Approach to Nonholonomic mechanical Driftless Systems

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An Explicit Time-Varying Periodic Feedback Control Approach ...

第二十三届中国控制会议

作者： Yueming Hu Yong Xia (college of automatic Science and engineering, South china university of Technology, Guangzhou, 510640)

＜正＞ Based on the explicit existence and uniqueness conditions of periodic solution for the initial value problem of nonlinear time-varying systems developed, an explicit time-varying periodic feedback control law is proposed for nonholonomic drift systems. Some properties of nonlinear time-varying systems are first introduced for designing sliding mode controller. An explicit time-varying feedback form is then given to guarantee the existence and uniqueness of periodic time-varying solution for the initial value problem （IVP） of the closed-loop system, or equivalently, n independent first integrals for the corresponding linear periodic partial differential equation （PDE）. An explicit discontinuous feedback control law is developed by using the first integrals, and the uniform asymptotic stability of the closed loop system is also proved via the invariance principle of nonlinear time-varying systems. Finally, the proposed approach is applied to the control problems of a hopping robot in flight phase and canonical nonholonomic systems with two inputs to illustrate the efficiency.

关键词： nonholonomic systems stabilization time-varying periodic state feedback robustness.

Comparisons between the Two Basic Transportation Policies in VMI（ID:F-034）

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Comparisons between the Two Basic Transportation Policies in...

第十四届工业工程与工程管理国际会议

作者： Liu Peng-fei~(1 2) Xie Ru-he~3 Yang Peng~4 1 School of Traffic and Transportation engineering Central South university changsha P.R.china 410075 2 School of Management changsha university of Science & Technology changsha P.R.china 410076 3 School of Economics and Management Guangzhou university Gaangzhou P.R.china 510006 4 hunan Financial and Economic college changsha P.R.china 410205

＜正＞Vendor managed inventory is a new management mode in which the vendor decides the replenishment time and quantity of the downstream *** are two basic coordination policies which are the time-based delivery policy and the quantity-based delivery *** process and the optimal results between the two policies are simply com- ***,considering the two cases of vendor optimal order-up-to level being zero and no-zero in the time- based policy,the long-run expected average cost and magnitude of the cost savings are compared between the two poli- *** results show the quantity-based policy performs better than the time-based policy in terms of the total long-run expected average *** also show the magnitude of the cost savings depends on the relative parameters.

关键词： Comparison Quantity-based Time-based Vendor Managed Inventory

A Lifetime Prediction Approach of Ring Laser Gyroscope without the Lifetime Test

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A Lifetime Prediction Approach of Ring Laser Gyroscope witho...

第二十七届中国控制会议

作者： Zhang Xiangping,Yang Haiyan,Liu Xiang Department of automatic Control college of Mechatronics engineering and Automation National university of Defense Technology,changsha 410073,P.R.china

In this paper,a lifetime prediction approach of the ring laser gyroscope（RLG） without the lifetime test is proposed based on the failure mechanism of RLG for saving time of the lifetime tests and its *** approach has a quite attractive idea that is to use both the gas chromatography technology and the adaptive aperiodic stochastic resonance algorithm to detect the content of weak impurity gas in the cavity of RLG so that we can predict the lifetime of RLG through established function between the content of weak impurity gas and the drop ratio of power output of *** convey idea about the approach without unnecessary complications,we will take He-Ne ring laser gyroscope for example to illustrate the effective of the approach in both theoretical analysis and numerical simulation.

关键词： Ring laser gyroscope Lifetime prediction Failure mechanism Gas chromatography Adaptive aperiodic stochastic resonance

An Adaptive Model and Algorithm for an Electro-hydraulic Position Servo System in Auto Gauge Control for Aluminum Hot Tandem Mill

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工程科学（英文版） 2007年第3期5卷 64-68页

作者： Li Fengyi1,Jin Xiaohong2,3,,Liu Yilun2(1.chinaLCO SWA Co.,,Chongqing,china,401326 2.college of mechanical and Electrical engineering,Central South university,changsha,china,410083 3.Fluid Power Transmission and Control Institute,Wuhan university of Science and Technology,Wuhan,china,430081)

The electro-hydraulic servo position control system(HPC) is the core of an auto gap control for a modern four-high continuous hot strip *** actuators are loaded with considerable external disturbances,rolling forces,and the system stiffness and position accuracy will become hypersensitive to the leakage and the compressibility of the *** efforts have being made to increase the position *** conventional resources are proportion-integral-differential(PID) *** the PID controller is faint for a considerable external *** this paper,by introducing the adaptive control strategy of model reference the reciprocities of the system structure with the loads were *** the Lyapunov energy function,an adaptive control algorithm applied to improve the system accuracy was *** system simulations and the selection of parameters of the model were also *** simulations show the static state errors at 0.02%.Finally,the industrial experimental result was given.

关键词： Lyapunov function adaptive control hydraulic position system four-high hot strip mill

WOOD BOARD AUTO CLASSING SYSTEM BASED ON VIRTUAL INSTRUMENTATION TECHNOLOGY

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WOOD BOARD AUTO CLASSING SYSTEM BASED ON VIRTUAL INSTRUMENTA...

亚洲精细农业与计算机农业应用联合大会

作者： Weibin Wu 1 2 Tiansheng Hong 1 Shunzhi Guan 1 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment (South china Agricultural university) Ministry of Education Guangzhou 510642 china college of engineering South china Agricultural university Guangzhou 510642 china 2 college of mechanical and Automotive engineering South china university of Technology 510641 china

A wood board auto-classifying system basing on virtual instrumentation technology has been established. The system hardware is composed of optical probe, computer terminal, capture card, signal/adjustment models and instructions-executing unit. The software adopts the notion of modularization, and is altogether divided into four modules including master operational controls, automatic detections, information processing and miscellaneous functions, displaying page by page. Each is further subdivided into sub-modules, such as data storage, statement display and printing, history review, important parameter amendment （code needed for parameter value）, statistical analysis （maximum, minimum and average, etc.）, help system, user administration and so on. Its operating interface is a design by LabVIEW, the virtual instrumentation software with direct test results displayed on screen. The system applies a sensor with three receivers to detect color of object （wood board）, then output voltage. After conditioning, data acquisition card signal is collected to the PC. By the voltage and the calibration of the relationship between voltage and color stimulus value, computer terminal will calculate the stimulus value, and compared with the set value, then get the chromatic aberration. Finally, according to the size and scope of chromatic aberration divide it into 8 categories, output the corresponding switch control signal to the executing agency. This system can automatically measure wood board chromatism and output order to drive the enforcing unit accordingly, avoiding disadvantage as low accuracy and uneven color because of fatigue, dizziness or subjectiveness, in order to save cost and increase more sorting levels. Applications feature humanization, convenience and high-speed response to the system. The system and high-precision millivoltmeter （0.01mV） measure weak voltage at the same time, choosing forty-five points within 0 to 500mV for comparison, the absolute value of sy

关键词： Virtual Instrumentation Technology Data Acquisition Card Signal Conditioning Chromatism Wood Board Auto Classing

Investigation for Electromechanical Coupling Unstability of Rolling Mill

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厦门大学学报（自然科学版） 2002年第S1期41卷 68-页

作者： TANG Hua-ping 1, WANG Dong-yun 2, ZHONG Jue 1 (1. college of mechanical and Electrical engineering, Central South university, changsha 410083, china 2. Zhong Yun Technology Institute, Zhengzhou 450007, china)

The unsteady condition of rolling Mill vibration that was caused by flexural vibration of strip was investigated. The parametric flexural vibration equation of rolled strip was established. The parametric flexural vibration stability of rolled strip was studied and region of stability and unstability was determined based on Floquet theory and perturbation method. The flexural-vibration of strip was unstable if the frequency of variable tension was twice as the natural frequency of flexural-vibration strip. The characteristics of electric current in a temp driving motor’s main loop was studied and tested, and approved that there were 6 humorous current ponderance and 12 humorous current ponderance in main circuit of driving motor. Vertical vibration of working roller was tested, the test approved that there were running unsteady caused by parametric vibration. It attached importance to the parametric vibration of rolling mill.

关键词： rolling mill parametric vibration floquet theory and mechanism

Phoenix Ⅱ螺旋锥齿轮磨齿机加工仿真系统的研究

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系统仿真学报 2009年第13期21卷 4171-4173页

作者：王志永曾韬中南大学机电工程学院长沙410075

分析了螺旋锥齿轮磨齿加工的基本原理,以AutoCAD为开发平台,利用AutoCAD内嵌的VBA编程语言,建立了基于尺寸驱动的齿坯和砂轮的实体模型,将Phoenix二型数控螺旋锥齿轮磨齿机的各轴运动转化为砂轮和齿坯的相对位置调整,通过砂轮与齿坯之... 详细信息

分析了螺旋锥齿轮磨齿加工的基本原理,以AutoCAD为开发平台,利用AutoCAD内嵌的VBA编程语言,建立了基于尺寸驱动的齿坯和砂轮的实体模型,将Phoenix二型数控螺旋锥齿轮磨齿机的各轴运动转化为砂轮和齿坯的相对位置调整,通过砂轮与齿坯之间的相减布尔运算模拟磨齿加工过程,通过仿真实例验证了仿真算法的正确性。所开发的磨齿加工仿真系统,为精确生成齿轮的三维实体模型以及验证机床调整参数提供了解决方法。通过将传统机械式机床的调整参数转化为基本机床调整参数,也可以利用该仿真系统生成齿轮的实体模型。

关键词：螺旋锥齿轮磨齿机加工仿真系统

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机器人足球智能控制系统分析与设计

计算机工程与应用 2004年第10期40卷 75-77页

作者：高青斌国防科技大学机电工程与自动化学院长沙410073

该文结合智能控制理论和多智能体系统理论分析了基于多智能体系统(MABS)的分级递阶智能控制系统结构,并将该控制结构用于机器人足球系统,提出了机器人足球系统的分级递阶智能控制结构,并运用基于人工神经网络的模糊控制系统为足球机器... 详细信息

该文结合智能控制理论和多智能体系统理论分析了基于多智能体系统(MABS)的分级递阶智能控制系统结构,并将该控制结构用于机器人足球系统,提出了机器人足球系统的分级递阶智能控制结构,并运用基于人工神经网络的模糊控制系统为足球机器人真正实现智能化控制提供了一种可行的控制方案。

关键词：智能控制多智能体系统机器人足球神经网络模糊控制