利用远红外激光干涉仪对Tokamak内部电子数密度和磁场分布进行测量是控制其放电状态的重要依据。从该方法的测量原理出发,分析了中频信号频率不稳定性对电子数密度和磁场分布测量以及Tokamak放电状态实时控制的影响;针对如何提高中频频...利用远红外激光干涉仪对Tokamak内部电子数密度和磁场分布进行测量是控制其放电状态的重要依据。从该方法的测量原理出发,分析了中频信号频率不稳定性对电子数密度和磁场分布测量以及Tokamak放电状态实时控制的影响;针对如何提高中频频率的稳定性提出了一套以单片机为核心的控制方案和控制系统,并研制了稳频控制器;通过现场调试,对比分析了控制前后中频信号的频率变化。实验结果表明,未接入稳频控制器时,30 min内中频频率中心值变化了90 k Hz;而接入稳频控制器后,中频频率中心值始终在设定值的±5 k Hz范围内变化。这表明该控制方法和控制系统能够实现中频频率的稳定控制。展开更多
随着汽车工业和汽车多媒体技术的发展,汽车收音机调谐器技术也趋向于单片集成化、全球应用化、自动调试化等特点发展。本文结合飞利浦公司最新开发设计的CREST IC TEF6860HL型高性能汽车收音机处理芯片,阐述了汽车收音机调谐器的最新技...随着汽车工业和汽车多媒体技术的发展,汽车收音机调谐器技术也趋向于单片集成化、全球应用化、自动调试化等特点发展。本文结合飞利浦公司最新开发设计的CREST IC TEF6860HL型高性能汽车收音机处理芯片,阐述了汽车收音机调谐器的最新技术发展方向和原理应用。展开更多
A model free intelligent muhivariable fuzzy controller (MFC) designed for modulating the vapor compression cycles in a residential inverter-driven air conditioning is proposed. The novel controller combines a tradit...A model free intelligent muhivariable fuzzy controller (MFC) designed for modulating the vapor compression cycles in a residential inverter-driven air conditioning is proposed. The novel controller combines a traditional fuzzy controller (TFC) and an additional coupling fuzzy controller, the coupling fuzzy controller is introduced to compensate for the unknown cross-coupling effects of this muhivariable system. In order to evaluate the control performance of the MFC, it is digitally implemented in terms of regulating the desired evaporating temperature and superheat. The experimental results show the effectiveness of the MFC for improvement of system performance and energy efficiency.展开更多
文摘利用远红外激光干涉仪对Tokamak内部电子数密度和磁场分布进行测量是控制其放电状态的重要依据。从该方法的测量原理出发,分析了中频信号频率不稳定性对电子数密度和磁场分布测量以及Tokamak放电状态实时控制的影响;针对如何提高中频频率的稳定性提出了一套以单片机为核心的控制方案和控制系统,并研制了稳频控制器;通过现场调试,对比分析了控制前后中频信号的频率变化。实验结果表明,未接入稳频控制器时,30 min内中频频率中心值变化了90 k Hz;而接入稳频控制器后,中频频率中心值始终在设定值的±5 k Hz范围内变化。这表明该控制方法和控制系统能够实现中频频率的稳定控制。
基金This work is supported by the National High Technology Research and Development Program of China (863 Programs, GrantNo. 2007AA05Z224)Knowledge Innovation Project of Chinese Academy of Sciences(Grant No.KGCX2-YW-345)Zhejiang Scientific and Technological Project(Grant No.2009C3113004)
文摘A model free intelligent muhivariable fuzzy controller (MFC) designed for modulating the vapor compression cycles in a residential inverter-driven air conditioning is proposed. The novel controller combines a traditional fuzzy controller (TFC) and an additional coupling fuzzy controller, the coupling fuzzy controller is introduced to compensate for the unknown cross-coupling effects of this muhivariable system. In order to evaluate the control performance of the MFC, it is digitally implemented in terms of regulating the desired evaporating temperature and superheat. The experimental results show the effectiveness of the MFC for improvement of system performance and energy efficiency.