High-bandwidth nano-positioning stages(NPSs)have boosted the advancement of modern ultra-precise,ultra-fast measurement and manufacturing technologies owing to their fast dynamic response,high stiffness and nanoscale ...High-bandwidth nano-positioning stages(NPSs)have boosted the advancement of modern ultra-precise,ultra-fast measurement and manufacturing technologies owing to their fast dynamic response,high stiffness and nanoscale resolution.However,the nonlinear actuation,lightly damped resonance and multi-axis cross-coupling effect bring significant challenges to the design,modeling and control of high-bandwidth NPSs.Consequently,numerous advanced works have been reported over the past decades to address these challenges.Here,this article provides a comprehensive review of high-bandwidth NPSs,which covers four representative aspects including mechanical design,system modeling,parameters optimization and high-bandwidth motion control.Besides,representative high-bandwidth NPSs applied to atomic force microscope and fast tool servo are highlighted.By providing an extensive overview of the design procedure for high-bandwidth NPSs,this review aims to offer a systemic solution for achieving operation with high speed,high accuracy and high resolution.Furthermore,remaining difficulties along with future developments in this fields are concluded and discussed.展开更多
A novel high-bandwidth, high-sensitivity differential optical receiver without any additional cost compared to general optical receivers, is proposed for high-speed optical communications and interconnections. High ba...A novel high-bandwidth, high-sensitivity differential optical receiver without any additional cost compared to general optical receivers, is proposed for high-speed optical communications and interconnections. High bandwidth and high sensitivity are achieved through a fully differential transimpedance amplifier with balanced input loads and two photodetectors to convert the incident light into a pair of differential photogenerated currents,respectively. In addition,a corresponding 0.35μm standard CMOS optoelectronic integrated receiver with two 60μm × 30μm, 1. 483pF fingered p^＋/n- well/p-substrate photodiodes is also presented. The simulation results demonstrate that it achieves a 1.37GHz bandwidth and a 81.9dBΩ transimpedance gain,supporting data rates up to at least 2Gbit/s. The device consumes a core area of 0. 198mm^2 and the optical sensitivity is at least - 13dBm for a 10^-12 bit error rate under a 2^15 - 1 PRBS input signal.展开更多
Typically,the achievable positioning bandwidth for piezo-actuated nanopositioners is severely limited by the first,lightly-damped resonance.To overcome this issue,a variety of open-and closed-loop control techniques t...Typically,the achievable positioning bandwidth for piezo-actuated nanopositioners is severely limited by the first,lightly-damped resonance.To overcome this issue,a variety of open-and closed-loop control techniques that commonly combine damping and tracking actions,have been reported in literature.However,in almost all these cases,the achievable closed-loop bandwidth is still limited by the original open-loop resonant frequency of the respective positioning axis.Shifting this resonance to a higher frequency would undoubtedly result in a wider bandwidth.However,such a shift typically entails a major mechanical redesign of the nanopositioner.The integral resonant control(IRC)has been reported earlier to demonstrate the significant performance enhancement,robustness to parameter uncertainty,gua-ranteed stability and design flexibility it affords.To further exploit the IRC scheme’s capabilities,this paper presents a method of actively shifting the resonant frequency of a nanopositioner’s axis,thereby delivering a wider closed-loop positioning bandwidth when controlled with the IRC scheme.The IRC damping control is augmented with a standard integral tracking controller to improve positioning accuracy.And both damping and tracking control parameters are analytically optimized to result in a Butterworth Filter mimicking pole-placement—maximally flat passband response.Experiments are conducted on a nanopositioner’s axis with an open-loop resonance at 508 Hz.It is shown that by employing the active resonance shifting,the closed-loop positioning bandwidth is increased from 73 to 576 Hz.Consequently,the root-mean-square tracking errors for a 100 Hz triangular trajectory are reduced by 93%.展开更多
光传送网(Optical Transport Network,OTN)技术凭借其独特的优势,在智能电网通信领域得到了广泛应用。深入探讨OTN技术在智能电网通信中的应用,详细阐述OTN技术的基本原理、对智能电网通信需求的适配情况、关键应用,分析其面临的挑战并...光传送网(Optical Transport Network,OTN)技术凭借其独特的优势,在智能电网通信领域得到了广泛应用。深入探讨OTN技术在智能电网通信中的应用,详细阐述OTN技术的基本原理、对智能电网通信需求的适配情况、关键应用,分析其面临的挑战并提出相应解决方案,为进一步提高智能电网通信水平提供理论依据和实践指导。展开更多
基金National Natural Science Foundation of China under Grants 52335010,U2013211 and 52305486。
文摘High-bandwidth nano-positioning stages(NPSs)have boosted the advancement of modern ultra-precise,ultra-fast measurement and manufacturing technologies owing to their fast dynamic response,high stiffness and nanoscale resolution.However,the nonlinear actuation,lightly damped resonance and multi-axis cross-coupling effect bring significant challenges to the design,modeling and control of high-bandwidth NPSs.Consequently,numerous advanced works have been reported over the past decades to address these challenges.Here,this article provides a comprehensive review of high-bandwidth NPSs,which covers four representative aspects including mechanical design,system modeling,parameters optimization and high-bandwidth motion control.Besides,representative high-bandwidth NPSs applied to atomic force microscope and fast tool servo are highlighted.By providing an extensive overview of the design procedure for high-bandwidth NPSs,this review aims to offer a systemic solution for achieving operation with high speed,high accuracy and high resolution.Furthermore,remaining difficulties along with future developments in this fields are concluded and discussed.
文摘A novel high-bandwidth, high-sensitivity differential optical receiver without any additional cost compared to general optical receivers, is proposed for high-speed optical communications and interconnections. High bandwidth and high sensitivity are achieved through a fully differential transimpedance amplifier with balanced input loads and two photodetectors to convert the incident light into a pair of differential photogenerated currents,respectively. In addition,a corresponding 0.35μm standard CMOS optoelectronic integrated receiver with two 60μm × 30μm, 1. 483pF fingered p^＋/n- well/p-substrate photodiodes is also presented. The simulation results demonstrate that it achieves a 1.37GHz bandwidth and a 81.9dBΩ transimpedance gain,supporting data rates up to at least 2Gbit/s. The device consumes a core area of 0. 198mm^2 and the optical sensitivity is at least - 13dBm for a 10^-12 bit error rate under a 2^15 - 1 PRBS input signal.
基金This work was supported in part by the National Natural Science Foundation of China(Grant Nos.U2013211 and 51975375)the Open Foundation of the State Key Laboratory of Fluid Power and Mechatronic Systems,China(Grant No.GZKF-202003)the Binks Trust Visiting Research Fellowship(2018),University of Aberdeen,UK,awarded to Dr.Sumeet S.Aphale.
文摘Typically,the achievable positioning bandwidth for piezo-actuated nanopositioners is severely limited by the first,lightly-damped resonance.To overcome this issue,a variety of open-and closed-loop control techniques that commonly combine damping and tracking actions,have been reported in literature.However,in almost all these cases,the achievable closed-loop bandwidth is still limited by the original open-loop resonant frequency of the respective positioning axis.Shifting this resonance to a higher frequency would undoubtedly result in a wider bandwidth.However,such a shift typically entails a major mechanical redesign of the nanopositioner.The integral resonant control(IRC)has been reported earlier to demonstrate the significant performance enhancement,robustness to parameter uncertainty,gua-ranteed stability and design flexibility it affords.To further exploit the IRC scheme’s capabilities,this paper presents a method of actively shifting the resonant frequency of a nanopositioner’s axis,thereby delivering a wider closed-loop positioning bandwidth when controlled with the IRC scheme.The IRC damping control is augmented with a standard integral tracking controller to improve positioning accuracy.And both damping and tracking control parameters are analytically optimized to result in a Butterworth Filter mimicking pole-placement—maximally flat passband response.Experiments are conducted on a nanopositioner’s axis with an open-loop resonance at 508 Hz.It is shown that by employing the active resonance shifting,the closed-loop positioning bandwidth is increased from 73 to 576 Hz.Consequently,the root-mean-square tracking errors for a 100 Hz triangular trajectory are reduced by 93%.
文摘光传送网(Optical Transport Network,OTN)技术凭借其独特的优势,在智能电网通信领域得到了广泛应用。深入探讨OTN技术在智能电网通信中的应用,详细阐述OTN技术的基本原理、对智能电网通信需求的适配情况、关键应用,分析其面临的挑战并提出相应解决方案,为进一步提高智能电网通信水平提供理论依据和实践指导。
