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智能转速传感器设计 被引量:8
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作者 张世英 于玺兴 +1 位作者 朱杰堂 胡宇 《传感技术学报》 CAS CSCD 北大核心 2011年第2期313-316,共4页
为了实现涡扇发动机的智能控制,针对传统传感器测量精度不高,易受外界环境干扰的问题,设计了一种通过测量发电机电压信号获取发动机转速的智能转速传感器,利用动态分频法进行了软件设计,并设计了软硬件抗干扰方案。实验结果表明,该智能... 为了实现涡扇发动机的智能控制,针对传统传感器测量精度不高,易受外界环境干扰的问题,设计了一种通过测量发电机电压信号获取发动机转速的智能转速传感器,利用动态分频法进行了软件设计,并设计了软硬件抗干扰方案。实验结果表明,该智能传感器实时性好,测量精度高,抗干扰能力强,适用于涡扇发动机的分布式控制系统。 展开更多
关键词 涡扇发动机 智能转速传感器 动态分频法 数字滤波器
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Dynamic Subcarrier Assignment for OFDM-PON Network Based on RSOA for ACCORDANCE 被引量:2
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作者 LIU Zhuo ZHANG Min +2 位作者 JIANG Jun ZHAN Yueying CHEN Xue 《China Communications》 SCIE CSCD 2014年第6期81-88,共8页
In this paper, we overview the principle of Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) systems, with a particular focus on upstream architectures capable of achieving 10Gbit/s colo... In this paper, we overview the principle of Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) systems, with a particular focus on upstream architectures capable of achieving 10Gbit/s colorless upstream transmission using Reflective Semiconductor Optical Amplifier (RSOA). We propose an architecture of RSOA based OFDM-PON which can achieve 10Gbit/s upstream transmission over a single wavelength. A novel Dynamic Subcarrier Assignment (DSA) algorithm is also proposed to support my architecture, namely Service based Polling in Pipeline (SPP) dynamic subcarrier algorithm. A simulation was conducted to study the performance of SPP algorithm. Compared with the traditional dynamic bandwidth allocation algorithms, service based polling meets the quality of in pipeline algorithm service requirements excellently, and adapts orthogonal frequency division multiplexing passive optical network better with higher bandwidth efficiency and lower algorithm complexity. 展开更多
关键词 OFDM-PON RSOA DBA QoS SPP
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An ultra-accurate dynamic isogeometric analysis with higher order mass formulation
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作者 WANG DongDong LI XiWei +1 位作者 LIU Wei ZHANG HanJie 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第7期1293-1309,共17页
An ultra-accurate isogeometric dynamic analysis is presented.The key ingredient of the proposed methodology is the development of isogeometric higher order mass matrix.A new one-step method is proposed for the constru... An ultra-accurate isogeometric dynamic analysis is presented.The key ingredient of the proposed methodology is the development of isogeometric higher order mass matrix.A new one-step method is proposed for the construction of higher order mass matrix.In this approach,an adjustable mass matrix is formulated through introducing a set of mass parameters into the consistent mass matrix under the element mass conservation condition.Then the semi-discrete frequency derived from the free vibration equation with the adjustable mass matrix is served as a measure to optimize the mass parameters.In 1D analysis,it turns out that the present one-step method can perfectly recover the existing reduced bandwidth mass matrix and the higher order mass matrix by choosing different mass parameters.However,the employment of the proposed one-step method to the2D membrane problem yields a remarkable gain of solution accuracy compared with the higher order mass matrix generated by the original two-step method.Subsequently a full-discrete isogeometric transient analysis algorithm is presented by using the Newmark time integration scheme and the higher order mass matrix.The full-discrete frequency is derived to assess the accuracy of space-time discretization.Finally a set of numerical examples are presented to evaluate the accuracy of the proposed method,which show that very favorable solution accuracy is achieved by the present dynamic isogeometric analysis with higher order mass formulation compared with that obtained from the standard consistent mass approach. 展开更多
关键词 isogeometric analysis dynamics semi-discrete frequency full-discrete frequency higher order mass matrix
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