期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到9篇文章
< 1 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Active vibration control for rotating machines with current-controlled electrodynamic actuators and velocity feedback of the machine feet based on a generalized mathematical formulation 认领 引用
1
作者 Ulrich Werner 《Control Theory and Technology》 EI CSCD 2025年第1期1-27,共27页
A theoretical analysis regarding active vibration control of rotating machines with current-controlled electrodynamic actuators between machine feet and steel frame foundation and with velocity feedback of the machine... A theoretical analysis regarding active vibration control of rotating machines with current-controlled electrodynamic actuators between machine feet and steel frame foundation and with velocity feedback of the machine feet vibrations is presented.First,a generalized mathematical formulation is derived based on a state-space description which can be used for different kinds of models(1D,2D,and 3D models).It is shown that under special boundary conditions,the control parameters can be directly implemented into the stiffness and damping matrices of the system.Based on the generalized mathematical formulation,an example of a rotating machine—described by a 2D model—with journal bearings,flexible rotor,current-controlled electrodynamic actuators,steel frame foundation,and velocity feedback of the machine feet vibrations is presented where the effectiveness of the described active vibration control system is demonstrated. 展开更多
关键词 Active vibration control Rotating machines Current-controlled electrodynamic actuators Steel frame foundation
Current-Controlled CFTA Based Fractional Order Quadrature Oscillators 认领 引用
2
作者 Tada Comedang Pattana Intani 《Circuits and Systems》 2016年第13期4201-4212,共12页
This paper presents a study of fractional order quadrature oscillators based on current-controlled current follower transconductance amplifiers (CCCFTA). The design realisation and performance of the fractional order ... This paper presents a study of fractional order quadrature oscillators based on current-controlled current follower transconductance amplifiers (CCCFTA). The design realisation and performance of the fractional order quadrature oscillators have been presented. The quadrature oscillators are constructed using three fractional capacitors of orders α = 0.5. The fractional capacitor is not available on the market or in the PSPICE program. Fortunately, the fractional capacitor can be realised by using the approximate method for the RC ladder network approximation. The oscillation frequency and oscillation condition can be electronically/orthogonally controlled via input bias currents. Due to high-output impedances, the proposed circuit enables easy cascading in current-mode (CM). The PSPICE simulation results are depicted, and the given results agree well with the anticipated theoretical outcomes. 展开更多
关键词 Fractional Order Quadrature Oscillator Current-Controlled Current Follower Transconductance Amplifier
暂未订购 下载PDF
The electric properties and the current-controlled differential negative resistance of cBN crystal 认领 引用
3
作者 DOU QingPing MA HaiTao 《Science China(Technological Sciences)》 CAS 2008年第12期2295-2300,共6页
The electric properties of nonintentionally doped n-cubic boron nitride(cBN)crystal are investigated.The cBN crystal was transformed from hexagonal-boron nitride(h-BN)under high pressure(HP)and high temperature(HT)usi... The electric properties of nonintentionally doped n-cubic boron nitride(cBN)crystal are investigated.The cBN crystal was transformed from hexagonal-boron nitride(h-BN)under high pressure(HP)and high temperature(HT)using magnesium powder as catalyst.At room temperature,the current-voltage(I-V)characteristics of cBN crystal are measured and found to be nonlinear.When the electric field is in the range of(1―1.5)×105 V/cm,the avalanche breakdown occurs inside the whole cBN crystal.At this same time,the bright blue-violet with the wavelength of 380―400 nm from the cBN crystal is observed.When measuring the I-V curve after breakdown of cBN crystal,the current-controlled differential negative resistance phenomenon is observed.The breakdown is repeatable. 展开更多
关键词 nonintentionally doped n-cBN nonlinear I-V characteristics current-controlled differential negative resistance light emission
暂未订购 下载PDF
Second-Order Transconductance-Mode Universal Filter Based on CCCⅡand OTA 认领 引用
4
作者 HOU Jingqiang YE Xiangdong +1 位作者 ZHENG Jie LI Yongan 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2025年第5期441-446,共6页
This research,based on Mason's formula,proposes a novel design for a second-order transconductance-mode universal filter with the operational transconductance amplifier(OTA)as the core and the second-generation cu... This research,based on Mason's formula,proposes a novel design for a second-order transconductance-mode universal filter with the operational transconductance amplifier(OTA)as the core and the second-generation current-controlled conveyor(CCCⅡ)as the auxiliary.The circuit incorporates two OTAs,one CCCⅡ,two grounded capacitors,and one grounded resistor.The quality factor Q and natural frequency fo of the filter can be electronically tuned and are not sensitive to temperature.The input and output terminals of the cir-cuit exhibit no loading effect,and the sensitivity of the circuit is low.At last,alternating frequency analysis,parameter scanning analysis,and temperature scanning analysis have been carried out by using Multisim software,confirming the correctness and effectiveness of the designed circuit. 展开更多
关键词 second-order universal filter transconductance-mode circuit second-generation current-controlled conveyor(CCCII) operational transconductance amplifier(OTA)
暂未订购 下载PDF
Systematic Synthesis for Electronic-Control Colpitts Oscillator Using CCCIIs 认领 引用 被引量：4
5
作者 LI Yongan CHEN Bo 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2019年第3期251-256,共6页
By the aid of nullor-mirror models of the second-generation current-controlled conveyor(CCCII) and applying the nodal admittance matrix(NAM) expansion method, the family of current-mode Colpitts oscillators employing ... By the aid of nullor-mirror models of the second-generation current-controlled conveyor(CCCII) and applying the nodal admittance matrix(NAM) expansion method, the family of current-mode Colpitts oscillators employing four CCCIIs and three grounded capacitors is synthesized. Thirty-two Colpitts oscillators using CCCIIs are obtained in all. By using canonical number of components, the circuits can be easily integrated and the oscillation criterion and the oscillation frequency can be independently and electronically tuned by tuning bias currents of the CCCIIs. The paper-and-pencil analysis and Pspice simulation results have been included to support the synthesis method. 展开更多
关键词 Colpitts oscillator electronic control current-controlled conveyor nodal admittance matrix expansion
暂未订购 下载PDF
Pathological Models of EXCCCII and Its Applications in Oscillator Synthesis 认领 引用 被引量：5
6
作者 LI Yongan HOU Jingqiang 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2021年第1期115-122,共8页
After giving six different forms of the extra X second-generation current-controlled conveyor(EXCCCII),pathological models of six EXCCCIIs are found by the nodal admittance matrix(NAM)expansion approach.Furthermore,th... After giving six different forms of the extra X second-generation current-controlled conveyor(EXCCCII),pathological models of six EXCCCIIs are found by the nodal admittance matrix(NAM)expansion approach.Furthermore,these ideal pathological circuit models are employed and 36 Wien oscillators and 8 third-order quadrature oscillators are synthesized by the NAM expansion.The hand analysis and computer analysis are introduced to prove the synthesized circuits are correct and effective. 展开更多
关键词 Wien oscillator third-order quadrature oscillator pathological element extra X second-generation current-controlled conveyor nodal admittance matrix expansion
暂未订购 下载PDF
An Electrical-Variable-Frequency Compact Wien-Bridge Oscillator 认领 引用 被引量：1
7
作者 LI Yongan HOU Jingqiang 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2022年第3期261-264,共4页
This paper designs a current-mode Wien-bridge oscillator to use current-controlled conveyor(CCCIIs)based on the traditional Wien-bridge oscillator and the adjoint network theorem.This oscillator employs only four CCCI... This paper designs a current-mode Wien-bridge oscillator to use current-controlled conveyor(CCCIIs)based on the traditional Wien-bridge oscillator and the adjoint network theorem.This oscillator employs only four CCCIIs and two grounded capacitors.Its resonant condition and resonant frequency can be independently and electronically varied by tuning bias currents of the CCCIIs linearly.Then this oscillator is simple in design,compact in size,and convenient in adjustment.The oscillator analysis and computer simulation results have been included to support the generation method. 展开更多
关键词 Wien-bridge oscillator orthogonal electronic control current-mode circuit second generation current-controlled conveyor(CCCIIs) adjoint network theorem
暂未订购 下载PDF
Systematic Synthesis on Pathological Models of CCCII and Modified CCCII 认领 引用 被引量：3
8
作者 Yong-An Li Yan-Hua Xi +2 位作者 Zhan-Ting Fan Yu-Ye Zhang Ji-Xia Wu 《Journal of Electronic Science and Technology》 EI CAS CSCD 2018年第2期163-168,共6页
According to the equivalent view for the terminal current-voltage constraint relationship between pathological elements and the various second-generation current-controlled convegors （CCCIIs）, four patholo- gical mo... According to the equivalent view for the terminal current-voltage constraint relationship between pathological elements and the various second-generation current-controlled convegors （CCCIIs）, four patholo- gical models for the CCCII are first derived by means of the nodal admittance matrix expansion in this paper. Moreover, 48 new pathological models for the modified CCCII are also synthesized. The derived pathological models for the various CCCIIs are expected to be useful in circuit analysis and synthesis. 展开更多
关键词 Modified second-generation currentcontrolled conveyor pathological elements secondgeneration current-controlled conveyor systematic synthesis
暂未订购 下载PDF
Electrical switching in cadmium ferrite with different rare-earth ions(Sm3+, Y3+, and La3+) 认领 引用 被引量：1
9
作者 Sanjeev P.Dalawai Ashok B.Gadkari Pramod N.Vasambekar 《Rare Metals》 SCIE EI CAS CSCD 2015年第2期133-136,共4页
The cadmium ferrite and 5 % rare-earth ions（Sm^3＋, Y^3＋, and La^3＋） added Cd ferrites were synthesized by oxalate co-precipitation method and characterized by X-ray diffraction（XRD）, Fourier transform infrared ... The cadmium ferrite and 5 % rare-earth ions（Sm^3＋, Y^3＋, and La^3＋） added Cd ferrites were synthesized by oxalate co-precipitation method and characterized by X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FT-IR）, and scanning electron microscope（SEM） techniques. All ferrite samples under investigation exhibit current-controlled negative resistance type I–E characteristics at room temperature. The required electrical-switching field in cadmium ferrite is higher than that for 5 % Sm^3＋, Y^3＋, and La^3＋added cadmium ferrites. The5% addition of Sm^3＋, Y^3＋, and La^3＋ in cadmium ferrite is found to decrease the grain size in this ferrite. This decrement in the grain size makes the required switching field to decrease in cadmium ferrite. No aging effect for electrical switching is observed in these ferrites. 展开更多
关键词 Rare-earth ions Current-controlled negativeresistance type electrical switching Grain size Cd ferrite
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈