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OPTIMAL FEED RATE CONTROL FOR MULTI-AXIS CNC MACHINING OF FREE FORM SURFACES 被引量:1
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作者 Zhan Yong, Zhou Ji, Zhou Yanhong, Zhou Yunfei (School of Mechanical Science and Engineering, Huazhong University of Science and Technology) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第3期171-177,共7页
Considering machining efficiency, surface quality and wear of cutter and machine, it is necessary to maintain high, stable and constant surface feed rate as far as possible.The feed late control strategy for multi-axi... Considering machining efficiency, surface quality and wear of cutter and machine, it is necessary to maintain high, stable and constant surface feed rate as far as possible.The feed late control strategy for multi-axis CNC machining of free-form surfaces is presented. It comprises: ①the determination of effective feed rate; ②the adoption of suitable approaches to smooth feed rate. This strategy considers path geometry, actuator limitation and machine dynamics. The result shows that machining efficiency is improved effectively. 展开更多
关键词 cnc Surface machining Feed rate Multi-axisp
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CNC机床丝杠热误差实时补偿设计及自动补偿试验
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作者 杨光 路晓云 《机械管理开发》 2024年第5期43-44,49,共3页
为了降低数控机床丝杠传动系统因热误差引起的定位误差,完成机床工作台各运行阶段的实时补偿。用非接触模式为丝杠非电机连接端安装位移检测器,以电涡流传感器时间监测丝杠端面位置数据,获得丝杠产生的总热误差,通过热补偿得到每段丝杠... 为了降低数控机床丝杠传动系统因热误差引起的定位误差,完成机床工作台各运行阶段的实时补偿。用非接触模式为丝杠非电机连接端安装位移检测器,以电涡流传感器时间监测丝杠端面位置数据,获得丝杠产生的总热误差,通过热补偿得到每段丝杠的热误差程度,确定每段坐标系原点发生的偏移,完成自主补偿机床丝杠热误差的效果。研究结果表明:采用分段补偿方法可以获得比其他热误差补偿模型更优的丝杠全段补偿性能。分别检测丝杠各段发生的热误差再对其实施补偿,可以根据丝杠各部位热误差程度实施补偿。 展开更多
关键词 数控机床 热误差 丝杠传动 实时补偿
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Geometric Error Identification of Gantry-Type CNC Machine Tool Based on Multi-Station Synchronization Laser Tracers
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作者 Jun Zha Huijie Zhang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2024年第2期150-162,共13页
Laser tracers are a three-dimensional coordinate measurement system that are widely used in industrial measurement.We propose a geometric error identification method based on multi-station synchronization laser tracer... Laser tracers are a three-dimensional coordinate measurement system that are widely used in industrial measurement.We propose a geometric error identification method based on multi-station synchronization laser tracers to enable the rapid and high-precision measurement of geometric errors for gantry-type computer numerical control(CNC)machine tools.This method also improves on the existing measurement efficiency issues in the single-base station measurement method and multi-base station time-sharing measurement method.We consider a three-axis gantry-type CNC machine tool,and the geometric error mathematical model is derived and established based on the combination of screw theory and a topological analysis of the machine kinematic chain.The four-station laser tracers position and measurement points are realized based on the multi-point positioning principle.A self-calibration algorithm is proposed for the coordinate calibration process of a laser tracer using the Levenberg-Marquardt nonlinear least squares method,and the geometric error is solved using Taylor’s first-order linearization iteration.The experimental results show that the geometric error calculated based on this modeling method is comparable to the results from the Etalon laser tracer.For a volume of 800 mm×1000 mm×350 mm,the maximum differences of the linear,angular,and spatial position errors were 2.0μm,2.7μrad,and 12.0μm,respectively,which verifies the accuracy of the proposed algorithm.This research proposes a modeling method for the precise measurement of errors in machine tools,and the applied nature of this study also makes it relevant both to researchers and those in the industrial sector. 展开更多
关键词 Multi-point positioning Multi-station synchronization cnc machine tool Geometric error Error separation
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Active Fault Tolerant Nonsingular Terminal Sliding Mode Control for Electromechanical System Based on Support Vector Machine
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作者 Jian Hu Zhengyin Yang Jianyong Yao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2024年第3期189-203,共15页
Effective fault diagnosis and fault-tolerant control method for aeronautics electromechanical actuator is concerned in this paper.By borrowing the advantages of model-driven and data-driven methods,a fault tolerant no... Effective fault diagnosis and fault-tolerant control method for aeronautics electromechanical actuator is concerned in this paper.By borrowing the advantages of model-driven and data-driven methods,a fault tolerant nonsingular terminal sliding mode control method based on support vector machine(SVM)is proposed.A SVM is designed to estimate the fault by off-line learning from small sample data with solving convex quadratic programming method and is introduced into a high-gain observer,so as to improve the state estimation and fault detection accuracy when the fault occurs.The state estimation value of the observer is used for state reconfiguration.A novel nonsingular terminal sliding mode surface is designed,and Lyapunov theorem is used to derive a parameter adaptation law and a control law.It is guaranteed that the proposed controller can achieve asymptotical stability which is superior to many advanced fault-tolerant controllers.In addition,the parameter estimation also can help to diagnose the system faults because the faults can be reflected by the parameters variation.Extensive comparative simulation and experimental results illustrate the effectiveness and advancement of the proposed controller compared with several other main-stream controllers. 展开更多
关键词 Aeronautics electromechanical actuator Fault tolerant control Support vector machine State observer Parametric uncertainty
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Numerical Investigation of Thermal Behavior of CNC Machine Tool and Its Effects on Dimensional Accuracy of Machined Parts
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作者 Erick Matezo-Ngoma Abderrazak El Ouafi Ahmed Chebak 《Journal of Software Engineering and Applications》 2024年第8期617-637,共21页
The dimensional accuracy of machined parts is strongly influenced by the thermal behavior of machine tools (MT). Minimizing this influence represents a key objective for any modern manufacturing industry. Thermally in... The dimensional accuracy of machined parts is strongly influenced by the thermal behavior of machine tools (MT). Minimizing this influence represents a key objective for any modern manufacturing industry. Thermally induced positioning error compensation remains the most effective and practical method in this context. However, the efficiency of the compensation process depends on the quality of the model used to predict the thermal errors. The model should consistently reflect the relationships between temperature distribution in the MT structure and thermally induced positioning errors. A judicious choice of the number and location of temperature sensitive points to represent heat distribution is a key factor for robust thermal error modeling. Therefore, in this paper, the temperature sensitive points are selected following a structured thermomechanical analysis carried out to evaluate the effects of various temperature gradients on MT structure deformation intensity. The MT thermal behavior is first modeled using finite element method and validated by various experimentally measured temperature fields using temperature sensors and thermal imaging. MT Thermal behavior validation shows a maximum error of less than 10% when comparing the numerical estimations with the experimental results even under changing operation conditions. The numerical model is used through several series of simulations carried out using varied working condition to explore possible relationships between temperature distribution and thermal deformation characteristics to select the most appropriate temperature sensitive points that will be considered for building an empirical prediction model for thermal errors as function of MT thermal state. Validation tests achieved using an artificial neural network based simplified model confirmed the efficiency of the proposed temperature sensitive points allowing the prediction of the thermally induced errors with an accuracy greater than 90%. 展开更多
关键词 cnc Machine Tool Dimensional Accuracy Thermal Errors Error Modelling Numerical Simulation Finite Element Method Artificial Neural Network Error Compensation
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基于TL-DBN方法的CNC机床节能策略设计
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作者 钟旭佳 李阳 宋佳佳 《现代工业经济和信息化》 2024年第9期135-136,140,共3页
为了提高数控机床节能性能,设计一种利用迁移学习方法实现数字控制机床(Computer numerical control,CNC)机床的节能控制过程。建立以随机森林(Random forest,RF)实现驱动功能的离散CNC机床能耗调控模型,减小等待阶段所消耗的能量,促进... 为了提高数控机床节能性能,设计一种利用迁移学习方法实现数字控制机床(Computer numerical control,CNC)机床的节能控制过程。建立以随机森林(Random forest,RF)实现驱动功能的离散CNC机床能耗调控模型,减小等待阶段所消耗的能量,促进机床决策效率的快速提升。研究结果表明,时间间隔对机床节能状态影响显著,当间隔增加后,机床由9次切换减少至6次切换,时间间隔设定在25 min最优。各机床都可以在等待阶段通过合适策略达到节能的控制过程,采用该节能控制方案为实现生产过程管控提供了理论依据。 展开更多
关键词 迁移学习 节能控制 cnc机床 深度置信网络
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柔性模块化CNC工装在离散型制造中的应用
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作者 廖益蓝 周传昆 +2 位作者 戴志杰 陆凯雷 王宇昊 《现代制造技术与装备》 2024年第8期201-203,共3页
电力装备零件加工具有小批量、多品种、加工复杂度不高的离散型制造特性,但频繁的装夹和换型调试会严重影响设备综合效率(Overall Equipment Effectiveness,OEE),导致加工效率偏低。研究结果表明:通过柔性组合工装设计,将大部分装夹过... 电力装备零件加工具有小批量、多品种、加工复杂度不高的离散型制造特性,但频繁的装夹和换型调试会严重影响设备综合效率(Overall Equipment Effectiveness,OEE),导致加工效率偏低。研究结果表明:通过柔性组合工装设计,将大部分装夹过程转移至设备外,可减少停机等待时间;通过模块化安装节点设计,快速提升工装安装速度,可缩短换型时间。通过对某数控机床(Computer Numerical Control,CNC)设备的工装进行柔性模块化改造,产品装夹时间和换型时间分别缩短了56.71%和41.18%,设备OEE水平提升了26.17%。经过3年推广应用,企业CNC设备的OEE已由45%~55%提升为70%~80%,产品交付效率显著提高,产品竞争力逐步增强。此外,该柔性模块化工装改造新模式,可为国内广大制造业厂家提供一种新的降本增效思路。 展开更多
关键词 设备综合效率(OEE) 柔性 模块化 数控机床(cnc) 工装
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高速动车组铝合金零件CNC铣削加工工艺研究
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作者 陈海权 《现代制造技术与装备》 2024年第8期138-140,共3页
高速动车组应用了较多铝合金零件。此类零件存在较高的加工装夹难度,若无法准确把握加工工艺,易出现加工缺陷。结合铝合金零件性能,详细分析零件计算机数字控制机床(Computer Numerical Control,CNC)铣削加工工艺特点,并从多个角度研究... 高速动车组应用了较多铝合金零件。此类零件存在较高的加工装夹难度,若无法准确把握加工工艺,易出现加工缺陷。结合铝合金零件性能,详细分析零件计算机数字控制机床(Computer Numerical Control,CNC)铣削加工工艺特点,并从多个角度研究铝合金零件的CNC铣削加工工艺及其热处理技术。合理优化加工参数和热处理技术,可提高铝合金零件的加工质量和机械性能,促进高速动车组铝合金零件加工工艺水平的提升,进而推动我国高速动车组的发展。 展开更多
关键词 高速动车组 铝合金 零件 计算机数字控制机床(cnc) 铣削加工工艺
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六轴空间插补联动CNC打磨设备及其离线编程方法
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作者 周裕庚 孔祥斌 +2 位作者 张翼 章旭霞 吴军 《铸造工程》 2024年第5期53-57,共5页
研发了一款六轴空间插补联动的CNC打磨设备及其离线编程方法,该六轴CNC打磨设备通过自主的结构设计和控制系统开发,实现了笛卡尔空间坐标系插补联动,且具有姿态变换灵活、刚性及动态响应性高、速度切换快、打磨不易振刀等特点,同时结合... 研发了一款六轴空间插补联动的CNC打磨设备及其离线编程方法,该六轴CNC打磨设备通过自主的结构设计和控制系统开发,实现了笛卡尔空间坐标系插补联动,且具有姿态变换灵活、刚性及动态响应性高、速度切换快、打磨不易振刀等特点,同时结合定制开发的离线编程软件,可将新产品的调试时间缩短一半以上。 展开更多
关键词 六轴空间联动 笛卡尔空间插补 cnc打磨设备 运动学模型 离线编程
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Monitoring Computer Numerical Control Machining Progress Based on Information Fusion 被引量:7
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作者 TONG Liang YAN Ping LIU Fei 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2011年第6期1074-1082,共9页
To cope with the market demand dynamically,enterprise needs to obtain the production status of work in process real-timely,but the information of machining progress has feature of uncertainty and can not reflect the s... To cope with the market demand dynamically,enterprise needs to obtain the production status of work in process real-timely,but the information of machining progress has feature of uncertainty and can not reflect the status of production field effectively.In this work,to overcome the ineffectiveness of computer numerical control(CNC) machining progress information extraction and its application restriction in practice because of heterogeneous system of CNC machine,based on information fusion by analyzing multi-sources information,estimating CNC machining status and predicting the machining progress through tracking tool coordinates,a CNC machining progress monitoring method is presented.The multi-sources heterogeneous information includes machining path,real-time spindle power information,manual input data and tool position.On the method of obtaining this multi-sources heterogeneous information,the method which helps explore numerical control(NC) program,monitor spindle power of CNC,collect human-computer interaction(HCI) information,obtain real-time tool coordinates and express the knowledge concerned in this field is analyzed; The decision rule of CNC machining status in the way of fusing multi-sources information in manufacturing process is summarized,as well as the machining progress tracking method in accordance with real-time tool coordinates and machining path is presented.Finally,the method discussed is proved feasible by the verification of machining progress tracking through simulation experiment.The proposed research realizes the effective integration of CNC machining progress information,and enables enterprises an efficient way to share CNC information and configure CNC resources optimally. 展开更多
关键词 machining progress information fusion machining path cnc machining process track
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Modeling Method for Flexible Energy Behaviors in CNC Machining Systems 被引量:4
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作者 Yu-Feng Li Yu-Lin Wang +2 位作者 Yan He Yan Wang Shen-Long Lin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2018年第1期156-166,共11页
CNC machining systems are inevitably confronted with frequent changes in energy behaviors because they are widely used to perform various machining tasks. It is a challenge to understand and analyze the flexible energ... CNC machining systems are inevitably confronted with frequent changes in energy behaviors because they are widely used to perform various machining tasks. It is a challenge to understand and analyze the flexible energy behaviors in CNC machining systems. A method to model flexible energy behaviors in CNC machining systems based on hierarchical objected-oriented Petri net(HOONet) is proposed. The structure of the HOONet is constructed of a high-level model and detail models. The former is used to model operational states for CNC machining systems, and the latter is used to analyze the component models for operational states. The machining parameters having great impacts on energy behaviors in CNC machining systems are declared with the data dictionary in HOONet models. A case study based on a CNC lathe is presented to demonstrate the proposed modeling method. The results show that it is effective for modeling flexible energy behaviors and providing a fine-grained description to quantitatively analyze the energy consumption of CNC machining systems. 展开更多
关键词 Energy behaviors cnc machining systems Modeling method HOONet
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Adaptive Fuzzy Control System of Servomechanism for Electro-Discharge Machining Combined with Ultrasonic Vibration 被引量:6
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作者 ZHANG Jian-hua, ZHANG Hui, SU Da-shi, QIN Yong, HUO Meng-You, ZHANG Qin-he (College of Mechanical Engineering, Shandong University, Jinan 250061, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期64-65,共2页
For electro-discharge machining, only in the optimum state could the highest material removal rate be realized. In practical machining process, the timely elevation of the tool electrode is needed to eliminate chippin... For electro-discharge machining, only in the optimum state could the highest material removal rate be realized. In practical machining process, the timely elevation of the tool electrode is needed to eliminate chipping, which ordinarily occupies quite a lot of time. Therefore, besides the control of the machining parameters, the control of the optimum discharge gap and the conversion of different machining states is also needed. In this paper, the adaptive fuzzy control system of servomechanism for EDM combined with ultrasonic vibration is studied, the servomechanism of which is composed of the stepping motor comprising variable steps and the inductive synchronizer. The fuzzy control technology is used to realize the control of the frequency and the step of the servomechanism. The adaptive fuzzy controller has three inputs and two outputs, which can well meet the actual control requirements. The constitution of the fuzzy control regulation for the step frequency is the key to the design of the whole fuzzy control system of the servomechanism. The step frequency is mainly determined by the position error and the change rate of the position error. When the value of the position error is high or medium, the controlled parameters are selected to eliminate the error; when the position error is lower, the controlled parameters are selected to avoid the over-orientation and thus keep the stability of the system. According to these, a fuzzy control table is established in advanced, which is used to express the relations between the fuzzy input parameters and the fuzzy output parameters. The input parameters and the output parameters are all expressed by the level-values in fuzzy field. Therefore, the output parameters used for control can be obtained for the fuzzy control table according to the detected actual input parameters, by which the EDM combined with ultrasonic vibration is improved and the machining efficiency is increased. In addition, a stimulation program is designed by means of Microsoft Visual Basic 展开更多
关键词 combined machining SERVOMECHANISM adaptive fuzzy control system
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STUDY ON ELECTRORHEOLOGICAL FLUID DAMPER FOR APPLICATION IN MACHINING CHATTER CONTROL 被引量:5
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作者 Yu Junyi Zhang YongliangWang Maohua Zhou XiaoqinFaculty of Mechanical Scienceand Engineering,Jilin University,Changchun 130025, China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第1期13-16,共4页
The electrorheological fluid(ERF)is a kind of intelligent material withbright prospects for industry applications, which has viscoelastic characteristic under the appliedelectric field. The dynamic model of a milling ... The electrorheological fluid(ERF)is a kind of intelligent material withbright prospects for industry applications, which has viscoelastic characteristic under the appliedelectric field. The dynamic model of a milling system with an ERF damper is established, and thechaffer suppression mechanism of the ER effect is discussed theoretically. Both the theoreticalstudy and the experimental investigation show that the additional damping and additional stiffnessproduced by the ERF increase with the rise in the strength of electric field E, but their influenceon the cuffing stability is different. Only when both additional damping and additional stiffnesscooperate, the milling chatter can be suppressed quickly and effectively. In additional, an ERFdamper used on the arbor of horizontal spindle milling machine is developed, and a series of millingchatter control experiments are performed. The experimental results show that the milling chaffercan be suppressed effectively by using the ER damper. 展开更多
关键词 machining chaffer ERF damper Additional damping Additional stiffness Chaffer control
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Research on cubic polynomial acceleration and deceleration control model for high speed NC machining 被引量:10
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作者 Hong-bin LENG Yi-jie WU Xiao-hong PAN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第3期358-365,共8页
To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (acc/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed c... To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (acc/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed control model provides continuity of acceleration, which avoids the intense vibration in high speed NC machining. Based on the discrete characteristic of the data sampling interpolation, the acc/dec control discrete mathematical model is also set up and the discrete expression of the theoretical deceleration length is obtained furthermore. Aiming at the question of hardly predetermining the deceleration point in acc/dec control before interpolation, the adaptive acc/dec control algorithm is deduced from the expressions of the theoretical deceleration length. The experimental result proves that the acc/dec control model has the characteristic of easy implementation, stable movement and low impact. The model has been applied in multi-axes high speed micro fabrication machining successfully. 展开更多
关键词 High speed NC machining Acceleration and deceleration (acc/dec) control model Cubic speed curve Discrete mathematical model Adaptive acceleration and deceleration control algorithm
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Development of tool-path generation module for 5-axis control machining of impellers 被引量:3
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作者 JUNG Hyoun-chul SON Hwang-jin JUNG Yoon-gyo 《Journal of Central South University》 SCIE EI CAS 2012年第12期3424-3429,共6页
An impeller is difficult to machine because of severe collision due to the complex shape,overlapping and twisted shape of the impeller blades.So,most computer aided manufacturing(CAM)software companies have developed ... An impeller is difficult to machine because of severe collision due to the complex shape,overlapping and twisted shape of the impeller blades.So,most computer aided manufacturing(CAM)software companies have developed CAM module for manufacturing impeller according to their CAM software.But these dedicated modules are difficult to use for inexperienced users.The purpose of this work is to develop a tool-path generation module for impellers.For this purpose,it is based on Visual Basic language and used CATIA graphical environment.The result of simulation for generated tool-path by the module is satisfactory.And it has slow processing speed compared to other commercial modules,but it is easy to use. 展开更多
关键词 IMPELLER computer aided manufacturing 5-axis control machining tool path MODULE
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Adaptive control of machining process based on extended entropy square error and wavelet neural network 被引量:2
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作者 赖兴余 叶邦彦 +1 位作者 李伟光 鄢春艳 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2007年第3期349-353,共5页
Combining information entropy and wavelet analysis with neural network,an adaptive control system and an adaptive control algorithm are presented for machining process based on extended entropy square error(EESE)and w... Combining information entropy and wavelet analysis with neural network,an adaptive control system and an adaptive control algorithm are presented for machining process based on extended entropy square error(EESE)and wavelet neural network(WNN).Extended entropy square error function is defined and its availability is proved theoretically.Replacing the mean square error criterion of BP algorithm with the EESE criterion,the proposed system is then applied to the on-line control of the cutting force with variable cutting parameters by searching adaptively wavelet base function and self adjusting scaling parameter,translating parameter of the wavelet and neural network weights.Simulation results show that the designed system is of fast response,non-overshoot and it is more effective than the conventional adaptive control of machining process based on the neural network.The suggested algorithm can adaptively adjust the feed rate on-line till achieving a constant cutting force approaching the reference force in varied cutting conditions,thus improving the machining efficiency and protecting the tool. 展开更多
关键词 machining process adaptive control extended entropy square error wavelet neural network
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Adaptation of feed rate for 3-axis CNC high-speed machining 被引量:1
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作者 张得礼 周来水 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第3期391-395,共5页
To improve the efficiency of CNC machining, assumptive transit circular arc is used to contour two adjacent moves together on the comer to make smooth paths. The radios of transit circular arc can be adjusted with con... To improve the efficiency of CNC machining, assumptive transit circular arc is used to contour two adjacent moves together on the comer to make smooth paths. The radios of transit circular arc can be adjusted with contour accuracy, and the feed rate on the corner can be controlled through limiting the maximum feed rate of transit circular arc segment. A look-ahead algorithm for a series of moves is proposed for speed adjustment in advance, which avoids the occurrence of overload of cutting tool on the comer and reduces the servo track error of parts on the corner or of circular arc move. Equivalent trapezoidal velocity profile is used to analyze the speed of S-curve velocity profile and work out its accurate interpolation, which overcomes the disadvantage of looking up table to calculate feed rate approximately, hence high accuracy and fine surface quality can be obtained while the machining speed is high. The proposed methods can meet the requirements of real-time analysis of high-speed machining. The presented algorithm is effective and has been adopted by CNC system of newly developed high-speed milling machine. 展开更多
关键词 cnc feedrate smoothing S-curve velocity profile high-speed machining
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Study on geometric models of non-numerically controlled machining revolving cutter with constant pitch 被引量:1
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作者 韩成顺 尚元江 +2 位作者 王景贺 唐余勇 董申 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第4期356-360,共5页
This paper presents a new approach of designing the revolving cutter with constant pitch, and provides geometric models. The corresponding models in the non-numerically controlled manufacturing, such as designing the ... This paper presents a new approach of designing the revolving cutter with constant pitch, and provides geometric models. The corresponding models in the non-numerically controlled manufacturing, such as designing the helical groove, grinding wheel, relative feeding motion, and calculating the helical angle of the cutting edge, are introduced. The examples are given to testify that the design approach is simple and readily realized in machining the revolving cutter with constant pitch. The effective design and manufacture method provides general references for non-NC machining revolving cutter with constant pitch and reducing the equipments input. 展开更多
关键词 revolving cutter constant pitch non-numerically controlled machining geometric model
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The Research of CNC Machining Cutter Choice Based on CAXA 被引量:1
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作者 RUAN Xiao-guang YUAN Si-cong CAI An-jiang ZHANG Dang-fei 《International Journal of Plant Engineering and Management》 2011年第3期129-133,共5页
The article introduces the unique characteristics of CNC machining center cutter compared to traditional cutters, analyzes the choice of CNC machining cutter and factors of choice. Meanwhile, proved by the examples wi... The article introduces the unique characteristics of CNC machining center cutter compared to traditional cutters, analyzes the choice of CNC machining cutter and factors of choice. Meanwhile, proved by the examples with manufacture software CAXA2004, the correct choice of CNC machining center cutter can give full play to the advantages of CNC machining and improve the economic efficiency and production levels of enterprises. 展开更多
关键词 cnc machining CUTTER CAXA
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An ADRC Parameters Self-Tuning Control Strategy of Tension System Based on RBF Neural Network 被引量:2
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作者 Shanhui Liu Haodi Ding +2 位作者 Ziyu Wang Li’e Ma Zheng Li 《Journal of Renewable Materials》 SCIE EI 2023年第4期1991-2014,共24页
High precision control of substrate tension is the premise and guarantee for producing high-quality products in roll-to-roll precision coating machine.However,the complex relationships in tension system make the probl... High precision control of substrate tension is the premise and guarantee for producing high-quality products in roll-to-roll precision coating machine.However,the complex relationships in tension system make the problems of decoupling control difficult to be solved,which has limited the improvement of tension control accuracy for the coating machine.Therefore,an ADRC parameters self-tuning decoupling strategy based on RBF neural network is proposed to improve the control accuracy of tension system in this paper.Firstly,a global coupling nonlinear model of the tension system is established according to the composition of the coating machine,and the global coupling model is linearized based on the first-order Taylor formula.Secondly,according to the linear model of the tension system,a parameters self-tuning decoupling algorithm of the tension system is proposed by integrating feedforward control,ADRC and RBF.Finally,the simulation results show that the proposed tension control strategy has good decoupling control performance and effectively improves the tension control accuracy for the coating machine. 展开更多
关键词 Coating machine tension system decoupling control ADRC RBF
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