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节能与自动化推动接触器和工控电器的发展 被引量:1
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作者 陈德桂 《电器与能效管理技术》 2014年第9期15-18,共4页
以接触器为核心,阐述了接触器、智能接触器、组合电器及无线按钮和PAC等新型工控电器的发展情况,对各公司新旧型号工控电器的性能进行了对比,并对其应力进行了仿真分析和优化设计。指出新型工控电器具有功耗低、体积小、性能高等特点,... 以接触器为核心,阐述了接触器、智能接触器、组合电器及无线按钮和PAC等新型工控电器的发展情况,对各公司新旧型号工控电器的性能进行了对比,并对其应力进行了仿真分析和优化设计。指出新型工控电器具有功耗低、体积小、性能高等特点,具有更高的可靠性和安全性。 展开更多
关键词 工控电器 传统接触器 小型化与高性能 智能接触器 组合电器 无线按钮与PAC
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Self-adaptive fuzzy controller with formulary rule for servo control of discharge gap in Micro EDM 被引量:2
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作者 TongHao LiYong 《High Technology Letters》 EI CAS 2012年第3期223-229,共7页
In micro electrical discharge machining (micro EDM), it is difficult for servo controlling the narrow discharge gap with the characters of non-linear and quick change. In this paper, aiming at solving the problems a... In micro electrical discharge machining (micro EDM), it is difficult for servo controlling the narrow discharge gap with the characters of non-linear and quick change. In this paper, aiming at solving the problems above, a self-adaptive fuzzy controller with formulary rule (SAFCFR) is presented based on the dual feedbacks composed by gap electric signal and discharge-ratio statistics. To ensure the properties of self-optimizing and fast stabilization, the formulary rule was designed with a tuning factor. In addition, the fast-convergence algorithms were introduced to adjust control target center and output scale factor. In this way, the normal discharge ratio can tend to the highest value during micro-EDM process. Experimental results show that the proposed algorithms are effective in improving the servo-control performance. According to the drilling-micro-EDM experiments, the machining efficiency is improved by 20% through applying SAFCFR. Moreover, SAFCFR is a prompt way to optimize parameters of discharge-gap servo control. 展开更多
关键词 MICRO-EDM self-adaptive fuzzy control discharge gap formulary rule fast con-vergence algorithm
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Fully Integrated Machine Control for Ultra Precision Machining
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《Journal of Mechanics Engineering and Automation》 2013年第8期465-472,共8页
To meet the demands for highly advanced components with ultra precise contour accuracy and optical surface quality arising in the fields of photonics and optics, automotive, medical applications and biotechnology, con... To meet the demands for highly advanced components with ultra precise contour accuracy and optical surface quality arising in the fields of photonics and optics, automotive, medical applications and biotechnology, consumer electronics and renewable energy, more advanced production machines and processes have to be developed. As the complexity of machine tools rises steadily, the automation of manufacture increases rapidly, processes become more integrated and cycle times have to be reduced significantly, challenges of engineering efficient machine tools with respect to these demands expand every day. Especially the manufacture of freeform geometries with non-continuous and asymmetric surfaces requires advanced diamond machining strategies involving highly dynamic axes movements with a high bandwidth and position accuracy. Ultra precision lathes additionally equipped with Slow Tool and Fast Tool systems can be regarded as state-of-the-art machines achieving the objectives of high quality optical components. The mechanical design of such ultra precision machine tools as well as the mechanical integration of additional highly dynamic axes are very well understood today. In contrast to that, neither advanced control strategies for ultra precision machining nor the control integration of additional Fast Tool systems have been sufficiently developed yet. Considering a complex machine setup as a mechatronic system, it becomes obvious that enhancements to further increase the achievable form accuracy and surface quality and at the same time decrease cycle times and error sensitivity can only be accomplished by innovative, integrated control systems. At the Fraunhofer Institute for Production Technology IPT a novel, fully integrated control approach has been developed to overcome the drawbacks of state-of-the-art machine controls for ultra precision processes. Current control systems are often realized as decentralized solutions consisting of various computational hardware components for setpoint generation, machine control, HMI (human machine interface), Slow Tool control and Fast Tool control. While implementing such a distributed control strategy, many disadvantages arise in terms of complex communication interfaces, discontinuous safety structures, synchronization of cycle times and the machining accuracy as a whole. The novel control approach has been developed as a fully integrated machine control including standard CNC (computer numerical control) and PLC (programmable logic controller) functionality, advanced setpoint generation methods, an extended HMI as well as an FPGA (field programmable gate array)-based controller for a voice coil driven Slow Tool and a piezo driven Fast Tool axis. As the new control system has been implemented as a fully integrated platform using digital communication via EtherCAT, a continuous safety strategy could be realized, the error sensitivity and EMC susceptibility could be significantly decreased and the overall process accuracy from setpoint generation over path interpolation to axes movements could be enhanced. The novel control at the same time offers additional possibilities of automation, process integration, online data acquisition and evaluation as well as error compensation methods. 展开更多
关键词 Ultra precision machining fully integrated control highly dynamic axes FPGA EtherCAT.
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