To address the issue of disturbance compensation deviation in linear active disturbance rejection control(LADRC),a linear active disturbance rejection control method with reference to the integral chain model(LADRC-R)...To address the issue of disturbance compensation deviation in linear active disturbance rejection control(LADRC),a linear active disturbance rejection control method with reference to the integral chain model(LADRC-R)is proposed.By constructing an ideal control reference model,a dynamic correlation between output deviation and uncompensated disturbances is established,and a dual-loop compensation mechanism is designed.Based on theoretical analysis and frequency-domain characteristics of typical first/second-order systems,this method maintains the parameter-tuning advantages of LADRC while reducing disturbance effects by 50%and introducing no phase lag during low-frequency disturbance suppression.Simulations on second-order systems verify its robustness under parameter perturbations,gain mismatch,and complex disturbances,and an optimized design scheme for the deviation compensator is proposed to suppress discontinuous measurement noise interference.Finally,the engineering effectiveness of this method in precision motion control is validated on an electromagnetic suspension platform,providing a new approach to improving the control performance of LADRC in environments with uncertain disturbances.展开更多
Optical frequency division(OFD)produces low-noise microwave and millimeter-wave(mmWave)signals by transferring the exceptional stability of optical references to electronic frequency domains.Recent developments in int...Optical frequency division(OFD)produces low-noise microwave and millimeter-wave(mmWave)signals by transferring the exceptional stability of optical references to electronic frequency domains.Recent developments in integrated optical references and soliton microcombs have paved the way for miniaturizing OFD oscillators to chip scale.Critical to this realization is a rapid tunable frequency comb that is stabilized to the optical references,thereby coherently linking optical and electronic frequencies.In this work,we advance the on-chip OFD technology using an integrated high-speed lead zirconate titanate(PZT)stress-optic actuator on the SiN soliton microcomb resonator.The integrated PZT actuator tunes the resonance frequency of the soliton-generating microresonator with a bandwidth exceeding 10s MHz and thus adjusts the soliton repetition rate.Optical frequency division and low-noise mmWave generation are demonstrated by feedback control of the soliton repetition rate through the integrated PZT-actuator,and the soliton microcomb is stabilized to a pair of reference lasers that are locked to an integrated 4 m SiN coil reference cavity.Our approach provides a fast,versatile,and integrated control mechanism for OFD oscillators and their applications in advanced communications,sensing,and precise timing.展开更多
The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press. Original scientific papers of advanced clinical and e...The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press. Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected. Articles must not have been published in English elsewhere and are not under simultaneous consideration by other publications.展开更多
The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press.Original scientific papers of advanced clinical and ex...The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press.Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected.展开更多
基金supported by the National Natural Science Foundation of China(Nos.62063009,52262050)the National Key Research and Development Program during the 14th 5-Year Plan(No.2023YFB4302100)the Major Science and Technology Research and Development Special Project in Jiangxi Province(No.20232ACE01011).
文摘To address the issue of disturbance compensation deviation in linear active disturbance rejection control(LADRC),a linear active disturbance rejection control method with reference to the integral chain model(LADRC-R)is proposed.By constructing an ideal control reference model,a dynamic correlation between output deviation and uncompensated disturbances is established,and a dual-loop compensation mechanism is designed.Based on theoretical analysis and frequency-domain characteristics of typical first/second-order systems,this method maintains the parameter-tuning advantages of LADRC while reducing disturbance effects by 50%and introducing no phase lag during low-frequency disturbance suppression.Simulations on second-order systems verify its robustness under parameter perturbations,gain mismatch,and complex disturbances,and an optimized design scheme for the deviation compensator is proposed to suppress discontinuous measurement noise interference.Finally,the engineering effectiveness of this method in precision motion control is validated on an electromagnetic suspension platform,providing a new approach to improving the control performance of LADRC in environments with uncertain disturbances.
基金Defense Advanced Research Projects Agency(HR0011-22-2-0008,N660012424000)National Science Foundation(2023775)。
文摘Optical frequency division(OFD)produces low-noise microwave and millimeter-wave(mmWave)signals by transferring the exceptional stability of optical references to electronic frequency domains.Recent developments in integrated optical references and soliton microcombs have paved the way for miniaturizing OFD oscillators to chip scale.Critical to this realization is a rapid tunable frequency comb that is stabilized to the optical references,thereby coherently linking optical and electronic frequencies.In this work,we advance the on-chip OFD technology using an integrated high-speed lead zirconate titanate(PZT)stress-optic actuator on the SiN soliton microcomb resonator.The integrated PZT actuator tunes the resonance frequency of the soliton-generating microresonator with a bandwidth exceeding 10s MHz and thus adjusts the soliton repetition rate.Optical frequency division and low-noise mmWave generation are demonstrated by feedback control of the soliton repetition rate through the integrated PZT-actuator,and the soliton microcomb is stabilized to a pair of reference lasers that are locked to an integrated 4 m SiN coil reference cavity.Our approach provides a fast,versatile,and integrated control mechanism for OFD oscillators and their applications in advanced communications,sensing,and precise timing.
文摘The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press. Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected. Articles must not have been published in English elsewhere and are not under simultaneous consideration by other publications.
文摘The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press.Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected.
