检索结果-内蒙古大学图书馆

2019计算智能、工程与信息技术世界大会

作者： Shuyuan Gan Xinzhou Zhang Lan Chen Department of Mechanical Engineering Jiangsu University Jiangsu Key Laboratory of Advanced Numerical Control Technology

This paper is devoted to the maintenance strategy of two deteriorating machines,taking into account different spare parts replenishment methods,two spare parts inventories,and buffer level *** minimal system cost is achieved by determining the initiating conditions of *** on machine age and buffer level,the maintenance policy is given with 9 control parameters corresponding to related *** to large complexity involved,the optimization is performed by a method combining Monte Carlo simulation and Genetic Algorithm.A numerical example is given to illustrate the proposed *** results show that the minimal cost seems stable with different production rates of the upstream ***,among two groups of maintenance conditions,higher machine age corresponds to lower buffer *** study firstly considers buffer and different spare replenishment methods together during the maintenance of serial *** proposed method can be theory basis for combined maintenance decisions.

关键词： Carlo Monte The Maintenance Strategy for Serial Machines Considering Intermediate Buffer and Different Spare Parts Replenishment Methods Buffer

来源：评论

学校读者我要写书评

暂无评论

Electric vehicle controller driving efficiency and power batteries pack capacity detecting test-bed design

IPPTA: Quarterly Journal of Indian Pulp and Paper Technical ...

引用

IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association 2018年第5期30卷 712-721页

作者： Ding, Zuowu School of Automotive and Rail Transit Nanjing Institute of Technology Nanjing China Jiangsu Key Laboratary of Advanced Numerical Control Technology Nanjing China

In order to compare the driving efficiency of different brand electric vehicle controller, to compare the capacity of different brand power batteries pack with the same nominal capacity, a test-bed with function of electric vehicle controller efficiency and power batteries pack capacity detecting is designed and made. The test-bed includes inertia load wheel speed detecting circuit, driving motor speed control circuit, power batteries pack current detecting circuit, power batteries pack terminal voltage detecting circuit, electric vehicle controller, auxiliary controller, inertia load wheels, speed changer, driving motor, load generator, power batteries pack, and so on. The auxiliary controller uses PID algorithm to control the electric vehicle controller. The electric vehicle controller makes the driving motor run at target “time-speed” curve been planned in advance. The efficiency of the 3 different brand electric vehicle controllers are detected, and 2 kinds of battery capacity are detected. The test results provide a basis for vehicle manufacturers to judge the performance of different brand electric vehicle controllers and power batteries pack. © 2018 Indian Pulp and Paper Technical Association. All Rights Reserved.

关键词： Efficiency

来源：评论

学校读者我要写书评

暂无评论

Condition-Based Maintenance Strategy for Stochastic Degradation Systems Considering Spare Parts

Condition-Based Maintenance Strategy for Stochastic Degradat...

引用

International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (ICQR2MSE)

作者： Nai-Fei Ren Yu Wang Shu-Yuan Gan 1. School of Mechanical Engineering Jiangsu University Zhen Jiang P.R. China Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing PR China

ISBN: (数字)9781728114279

ISBN: (纸本)9781728114286

Effective spare parts inventory management can not only ensure timely maintenance of equipment maintenance activities, but also reduce inventory capital occupation and improve the economic benefits of enterprises. In this paper, we present a condition-based maintenance strategy that considers spare parts issues for systems, with the goal of jointly optimizing conditional-based maintenance and spare parts management. Random systems are gradually degraded and continuously monitored. Spare parts supply using (S-1,S) type inventory strategy. According to the proposed strategy, the replacement of components is based on the actual degree of degradation, which is caused by the demand for spare parts. The Monte Carlo simulation method was used to simulate the proposed condition-based maintenance and spare parts replacement strategy. Therefore, the optimal solution is obtained by jointly optimizing the spare parts and condition-based maintenance of the components. Finally, a numerical example is delivered to show the proposed method.

关键词： Degradation Safety Mathematical model Monte Carlo methods Inspection Preventive maintenance

来源：评论

学校读者我要写书评

暂无评论

Research on interpolation of NURBS curve based on fractional power

引用

Journal of Physics: Conference Series 2020年第1期1633卷

作者： Hao Zhu Mulan Wang Baosheng Wang School of Communication Nanjing Institute of Technology Nanjing 211167 China Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing 211167 China

According to the problem of discontinuous of jerk and low rate of federate change in S-shape federate control method, a jerk-limited federate control scheme which reduces the shock to machine tool in interpolating is presented. The constraints are analyzed from the angle of bow height error and acceleration. The simulation result shows that this method can improve the feed speed faster, realize the smooth transition of acceleration, and reduce NURBS Flexible impact on machine tool during curve interpolation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on Predictive Functional control Based on Disturbance Observer for PMLSM Speed System 36

Research on Predictive Functional Control Based on Disturban...

引用

第36届中国控制会议

作者： Zhou Lei Lin Jian Huang Jia-cai School of Automation Nanjing Institute of Technology Jiangsu Key Laboratory of Advanced Numerical Control Technology

ISBN: (纸本)9781538629185

A predictive functional control method based on disturbance observer is proposed to improve the performance of the permanent magnet linear synchronous motor servo system,which is usually characterized by nonlinearity,uncertainty and *** disturbance observer is applied to estimate the disturbance in real time and then compensation current is produced to restrain the load disturbance in the speed *** simulation results show that the controller based on the disturbance observer and predictive functional controller can improve the response speed and steady-state accuracy of the *** the controller shows strong robustness and anti-disturbance,it can be used to effectively control the complex systems.

关键词： permanent magnet linear synchronous motor（PMLSM） disturbance observer predictive functional control（PFC）

来源：评论

学校读者我要写书评

暂无评论

Design of multi-bus communication system for E-workshop

引用

AIP Conference Proceedings 2019年第1期2073卷

作者： Hao Zhu Xiaochun Zhu Ye Zhang 1Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China

In order to solve the defects of the low level of intelligence, poor scalability and low communication rate of the point-to-point protocol converter in the traditional E-workshop. Based on the existing CAN/RS485/Ethernet protocol, a workshop communication system based on STM32F4 control chip is designed. The communication interface of CAN/RS485/Ethernet and the software implementation of protocol conversion are given. The simulation and experimental results show that the data transmission rate of the communication system is significantly better than the traditional point-to-point protocol converter, and the data transmission is accurate and the bit error rate is low. Therefore, the communication system is more in line with the development needs of manufacturing communications.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Communication scheduling design of multi-agent system based on improved Greedy algorithm

引用

AIP Conference Proceedings 2019年第1期2073卷

作者： Hao Zhu Xiaochun Zhu Ye Zhang 1Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China

Based on the SIEMENS PLC control system, a multi agent system model of e workshop is established. The real-time data transmission problem and delay model are analyzed. On this basis, the traditional Greedy algorithm is improved and applied to multi Agent systems. The simulation results show that the algorithm can effectively improve the efficiency of system scheduling. The more tasks the system has, the longer the scheduling time saved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Combining spacetime stereo and phase-shift for fast 3D shape measurement 32

Combining spacetime stereo and phase-shift for fast 3D shape...

引用

32nd Youth Academic Annual Conference of Chinese Association of Automation, YAC 2017

作者： Wei, Bao Yuhua, Xu Mulan, Wang Hao, Zhu School of Electrical Engineering and Automation Hefei University of Technology Hefei230009 China College of Aerospace Science and Engineering National University of Defense Technology Changsha410073 China Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing211167 China

ISBN: (纸本)9781538629017

In this paper we propose a method named spacetime stereo phase-shift for fast 3D shape measurement. It combines the advantages of the spacetime stereo approach and phase-shift approach. We first generate two different binary random patterns. In each projection cycle, four patterns including three phase-shift patterns and one binary random pattern are projected. In the two adjacent projection cycles, the two random patterns are switched alternatively, which is the main feature distinguishing the proposed approach with other approaches. As a result, we can use five image pairs for reconstruction without increasing the number of the patterns. Detailedly, we use the two image pairs of the random patterns (one of them is from the previous projection cycle) to establish the dense and subpixel-level correspondences by combining the wrapped phase maps from the three-step phase-shift method in the spacetime stereo framework. With an extra random pattern, the discrimination of the matching window can be enhanced greatly so that a simple local stereo matching method using the normalized cross correlation (NCC) can be utilized to acquire reliable matching. Experimental results show that the proposed method can improve the reconstruction results evidently. © 2017 IEEE.

关键词： Stereo image processing

来源：评论

学校读者我要写书评

暂无评论

Rail inspection system based on iGPS

引用

AIP Conference Proceedings 2018年第1期1967卷

作者： Xiaoyan Fu Mulan Wang Xiuping Wen 1Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China 2Industria Center Nanjing Institute of Technology Nanjing 211167 China

Track parameters include gauge, super elevation, cross level and so on, which could be calculated through the three-dimensional coordinates of the track. The rail inspection system based on iGPS (indoor/infrared GPS) was composed of base station, receiver, rail inspection frame, wireless communication unit, display and control unit and data processing unit. With the continuous movement of the inspection frame, the system could accurately inspect the coordinates of rail; realize the intelligent detection and precision measurement. According to principle of angle intersection measurement, the inspection model was structured, and detection process was given.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Calibration of cutting force coefficients using surface errors in milling of thin-walled workpiece

引用

Metallurgical and Mining Industry 2015年第7期7卷 159-165页

作者： Wang, Baosheng Hao, Hongyan Zuo, Jianmin Wang, Mulan Feng, Yong Hou, Junming School of Materials Engineering Nanjing Institute of Technology Nanjing Jiangsu China Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Jiangsu China

Cutting force coefficients are the key factors for efficient and accurate prediction of milling force. This paper presents a new method to calibrate the cutting force coefficients using the surface errors related to milling of thin-walled workpiece including effect of cutter runout. The surface error is separated into nominal surface error and perturbation component due to runout. By analyzing forming of surface error, cutter deformation and deflection of thin-walled workpiece, the result that cutter runout has no effect on the average surface error is achieved. Relationship between nominal surface error and cutting force coefficients is constructed, and also an approach for extraction of nominal surface error from measured surface error is proposed. Then, the cutting force coefficients are estimated conveniently. Milling tests are carried out to verify the proposed method. A good agreement between predicted results and experimental results is achieved, which shows that the method is efficient.

关键词： Milling (machining)

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：