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| 1 | Switched adaptive active disturbance rejection control of variable structure near space vehicles based on adaptive dynamic programming显示文摘Based on the switched nonlinear system, a switched adaptive Active Disturbance Rejection Control(ADRC) law is proposed for the Variable Structure Near Space Vehicle(VSNSV) with unknown uncertainties and external disturbances. The reduced-order Extended State Observers(ESOs) are constructed for the attitude angle system and the angular rate system to estimate the total disturbance in real time. With the extended state introduced to counteract the effects of uncertainties and disturbances, a systematic procedure is presented for the synthesis of the switched adaptive ADRC strategy. Rigorous proof shows that the estimation errors of the reduced-order ESOs would converge to a small neighborhood of zero in finite time, and that the output of the closedloop system can track a given signal stably for a class of switching signals with average dwell time via the proposed approach. The variable gain control strategy based on Adaptive Dynamic Programming(ADP) with the actor-critic structure is also designed to improve the dynamic performance of the system. Simulation results verify the effectiveness and advantage of the proposed control scheme. | Chaoyang DONG Chen LIU Qing WANG Ligang GONG | 2019 | Chinese Journal of Aeronautics2019，32，7： | 10 |
| 2 | Switching disturbance rejection attitude control of near space vehicles with variable structure显示文摘A switching disturbance rejection attitude control law is proposed for a near space vehicle(NSV) with variable structure.The multiple flight modes, system uncertainties and disturbances of the NSV are taken into account based on switched nonlinear systems. Compared with traditional backstepping design methods,the proposed method utilizes the added integrals of attitude angle and angular rate tracking errors to further decrease the tracking errors. Moreover, to reduce the computation complexity, a rapid convergent differentiator is employed to obtain the derivative of the virtual control command. Finally, for disturbance rejection, based on the idea from the extended state observer(ESO), two disturbance observers are designed by using non-smooth functions to estimate the disturbances in the switched nonlinear systems. All signals of the closed-loop system are proven to be uniformly ultimately bounded under the Lyapunov function framework. Simulation results demonstrate the effectiveness of the proposed control scheme. | GONG Ligang WANG Qing DONG Chaoyang | 2019 | Journal of Systems Engineering and Electronics2019，30，1： | 2 |
| 3 | Closed-loop fault detection for full-envelope fligh vehicle with measurement delays显示文摘A closed-loop fault detection problem is investigated for the full-envelope flight vehicle with measurement delays,where the flight dynamics are modeled as a switched system with delayed feedback signals.The mode-dependent observer-based fault detection filters and state estimation feedback controllers are derived by considering the delays’impact on the control system and fault detection system simultaneously.Then,considering updating lags of the controllers/filters’switching signals which are introduced by the delayed measurement of altitude and Mach number,an asynchronous H∞ analysis method is proposed and the system model is further augmented to be an asynchronously switched time-delay system.Also,the global stability and desired performance of the augmented system are guaranteed by combining the switched delay-dependent Lyapunov–Krasovskii functional method with the average dwell time method(ADT),and the delaydependent existing conditions for the controllers and fault detection filters are obtained in the form of the linear matrix inequalities(LMIs).Finally,numerical example based on the hypersonic vehicles and highly maneuverable technology(Hi MAT)vehicle is given to demonstrate the merits of the proposed method. | Wang Zhaolei Wang Qing Dong Chaoyang Gong Ligang | 2015 | Chinese Journal of Aeronautics2015，28，3： | 2 |
| 4 | Molecular analysis of a UDP-glucose: flavonoid 3-O-glucosyl- transferase (UFGT) gene from purple potato (Solanum tuberosum)显示文摘 | Hu Chaoyang Gong Yifu Jin Si | 2011 | Mol Biol Rep2011，38，： | 1 |
| 5 | In- verse neuro-fuzzy MR damper model and its application in vibration control of vehicle suspension system显示文摘 | Zong Luhang Gong Xinglong Guo Chaoyang | 2012 | Vehicle System Dynamics2012，50，7： | 1 |
| 6 | Recent Progress in Fiber Optofluidic Lasing and Sensing显示文摘Fiber optofluidic laser(FOFL)integrates optical fiber microcavity and microfluidic channel and provides many unique advantages for sensing applications.FOFLs not only inherit the advantages of lasers such as high sensitivity,high signal-to-noise ratio,and narrow linewidth,but also hold the unique features of optical fiber,including ease of integration,high repeatability,and low cost.With the development of new fiber structures and fabrication technologies,FOFLs become an important branch of optical fiber sensors,especially for application in biochemical detection.In this paper,the recent progress on FOFL is reviewed.We focuse mainly on the optical fiber resonators,gain medium,and the emerging sen sing applicatio ns.The prospects for FOFL are also discussed.We believe that the FOFL sensor provides a promising technology for biomedical analysis and environmental monitoring. | Xi YANG Chaoyang GONG Yiling LIU Yunjiang RAO Mateusz SMIETANA Yuan GONG | 2021 | Photonic Sensors2021，11，2： | 1 |
| 7 | Submonolayer biolasers for ultrasensitive biomarker detection显示文摘Biomarker detection is key to identifying health risks.However,designing sensitive and single-use biosensors for early diagnosis remains a major challenge.Here,we report submonolayer lasers on optical fibers as ultrasensitive and disposable biosensors.Telecom optical fibers serve as distributed optical microcavities with high Q-factor,great repeatability,and ultralow cost,which enables whispering-gallery laser emission to detect biomarkers.It is found that the sensing performance strongly depends on the number of gain molecules.The submonolayer lasers obtained a six-order-of-magnitude improvement in the lower limit of detection(LOD)when compared to saturated monolayer lasers.We further achieve an ultrasensitive immunoassay for a Parkinson's disease biomarker,alpha-synuclein(α-syn),with a lower LOD of 0.32 pM in serum,which is three orders of magnitude lower than theα-syn concentration in the serum of Parkinson's disease patients.Our demonstration of submonolayer biolaser offers great potentials in high-throughput clinical diagnosis with ultimate sensitivity. | Chaoyang Gong Xi Yang Shui-Jing Tang Qian-Qian Zhang Yanqiong Wang Yi-Ling Liu Yu-Cheng Chen Gang-Ding Peng Xudong Fan Yun-Feng Xiao Yun-Jiang Rao Yuan Gong | 2023 | Light(Science & Applications)2023，12，12： | 0 |
| 8 | Thermo-Rheological Structure and Passive Continental Margin Rifting in the Qiongdongnan Basin, South China Sea, China显示文摘To investigate the thermo-rheological structure and passive continental margin rifting in the Qiongdongnan Basin(QDNB),thermo-rheological models of two profiles across the western and eastern QDNB are presented.The continental shelf of western QDNB,having the lowest crustal extension factor,is recognized as the initial non-uniform extension crust model.This regime is referred to as the jelly sandwich-1(JS-1)regime,having a lower crustal ductile layer.The oceanward part of the western QDNB changes from the relatively strong JS-1 to the weak crème brûlée-1(CB-1)regime with a significantly thinned lower crust.However,the crustal extension in the eastern QDNB is significantly higher than that in the western QDNB,with conjugate faults extending deep into the lower crust.The central depression zone of the eastern QDNB is defined as the much stronger JS-2 regime,having a brittle deformation across the entire crust and upper mantle and characteristics of a cold and rigid oceanic crust.Unlike the widespread lower crustal high-velocity layers(HVLs)in the northern margin of the South China Sea,the HVLs are confined to the lower crustal base of the central depression zone of the QDNB.The HVLs of QDNB are the results of non-uniform extension with mantle underplating during the lower crustal-necking stage,which is facilitated by the lower crustal ductile layer and derived by mantle lat-eral flowing.The gigantic mantle low-velocity zone related to the Red River Fault should be a necessary factor for the east-west differential margin rifting process of QDNB,which may drive the lateral flowing in the mantle. | LI Chaoyang JIANG Xiaodian GONG Wei | 2022 | Journal of Ocean University of China2022，21，2： | 0 |
| 9 | Result of proton beam energy calibration of GECAM satellite charged particle detector显示文摘Purpose A charged particle detector(CPD)is one of two main detectors on the GECAM satellite.It was designed to detect charged particles.Electrons and protons are space’s mainly charged particles.So,a research on the proton detection ability of a CPD and deriving the energy response to charged particles of the CPD in the two designed operating modes is important.Method The proton calibration tests of the CPD under diferent working modes were carried out at the Heavy Ion Research Facility in Lanzhou.Result and conclusion Through testing and analysis,it was concluded that when CPD works in semi-component mode,it can detect the maximum energy,and when working in full-component mode,it can provide better energy resolution. | Chaoyue Zhang Xiaohua Liang Yanbing Xu Wenxi Peng Jianjian He Dongya Guo Ke Gong Yaqing Liu Zhenghua An Dali Zhang Sheng Yang Xiaojing Liu Xiangyang Wen Rui Qiao Jinzhou Wang Min Gao Shaolin Xiong Fan Zhang Xinqiao Li Xingzhu Cui Chaoyang Li Jilong Tang Xiaohua Wang Dengkui Wang Zhipeng Wei | 2022 | Radiation Detection Technology and Methods2022，6，1： | 0 |
| 10 | The Subduction Structure Beneath the New Britain Island Arc and the Adjacent Region from Double-Difference Tomography显示文摘We applied double-difference tomography to relocate seismic events and determine the lithospheric velocity structure beneath the New Britain Island arc and the South Bismarck Sea Basin,based on the local P wave arrival time dataset collected by the International Seismological Centre.Results of the seismic relocation and velocity inversion show that the subduction of Solomon Sea Plate along the New Britain Trench is spatially different above 150 km,and the subduction angle of the slab on the west side is higher than that on the east side.The relocated earthquakes also show that there are double seismic zones at the depths of about 30–90km beneath the New Britain Island Arc.The velocity structure shows that the dehydration of the subducting slab caused the low-velocity anomalies in mantle wedge above the slab,which are associated with the magmatic activities around the New Guinea-New Britain Island arc.Moreover,it shows that there is another low-velocity anomaly zone beneath the Bismarck mid-oceanic ridge with spatial variation.Beneath the west of the Bismarck mid-oceanic ridge,the low-velocity anomaly is weakly connected to the subducted Solomon Sea slab.Conversely,the low-velocity anomaly beneath the Manus Sea Basin is highly intertwined to the subducting slab and its mantle wedge,indicating that the subduction of the Solomon Sea Plate might be a key deep dynamic factor that drives the spreading of the Manus Sea Basin and the separation of the Bismarck Plate. | ZHANG Hao GONG Wei XING Junhui XU Chong LI Chaoyang | 2023 | Journal of Ocean University of China2023，22，1： | 0 |
| 11 | Application of Geoid Anomalies to the Tectonic Research in the East Asian Continental Margin显示文摘In this paper, we calculated multi-scale residual geoid anomalies with the method of geoid separation processing, according to EGM2008 ultra-high order gravity field model, remove-restore technique and Stokes integral. The East Asian continental margin was selected as the study area. The residual geoid anomalies have been calculated by programming. On the basis of residual geoid anomalies at various orders, the interlayer geoid anomalies at different depths were calculated to depict the spatial distribution characteristics of the residual geoid. Finally, we conducted a detailed geophysical interpretation for the study area according to the geoid anomalies in combination with other geophysical datasets. Four conclusions can be outlined as follows: 1) it is impracticable that geoid anomalies are used in the interpretation of the shallow objects due to the influence of the terrain; 2) the anomalies of residual geoid can reflect the intensity of small-scale mantle convection in the asthenosphere; 3) the interlayer geoid anomalies can reflect the magmatic activities associated with the mantle convection and mantle plume in different scales; 4) the study of the geoid may provide an approach for the research of the subduction zone, mantle convection and mantle plume. | WU Xiaoyang XING Junhui LI Chaoyang LIU Xinzhe YANG Kai CHEN Hongyan GONG Wei | 2018 | Journal of Ocean University of China2018，17，4： | 0 |
| 12 | NONLINEAR OPTICAL PROPERTY OF para-DISUBSTITUTED BENZYLIDENE-ANILINE DERIVATIVES显示文摘Forty para-disubstituted benzylidene-aniline derivatives weresynthesized,and their second harmonic generation(SHG)efficiency was measuredby the Kurtz powder technique.The effect of the electronic property and theposition of the substituents on powder SHG efficiency was studied. | Daoyu LIU Chaoyang DAI Jingui QIN Xiaoping GONG (Department of Chemistry,Wuhan University,Wuhan 430072) Chuangtian CHEN Baichang WU (Fujian Institute of Research on the Structure of Matter,Chinese Academy of Science,Fuzhou 350002) | 1990 | Chinese Chemical Letters1990，1，3： | 0 |
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