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Journal of Environmental Sciences 2025年第2期148卷 198-209页

作者： Linchun Nie Shuangying Li Xiaozhong Gao Shuai Yuan Guangyu Dong guojin tang Denghao Song Lutong Bu Qingxiang Zhou College of Chemical Engineering and Environment China University of Petroleum-BeijingBeijing 102249China

Norfloxacin is widely used owing to its strong bactericidal effect on Gram-negative ***,the residual norfloxacin in the environment can be biomagnified via food chain andmay damage the human liver and delay the bone development *** work described a reliable and sensitive smartphone colorimetric sensing system based on cobaltdoped Fe_(3)O_(4) magnetic nanoparticles(Co-Fe_(3)O_(4) MNPs)for the visual detection of *** with Fe_(3)O_(4),Co-Fe_(3)O_(4) MNPs earned more remarkably peroxidase-like activity and TMB(colorless)was rapidly oxidized to oxTMB(blue)with the presence of H_(2)O_(2).Interestingly,the addition of low concentration of norfloxacin can accelerate the color reaction process of TMB,and blue deepening of the solution can be observed with the naked ***,after adding high concentration of norfloxacin,the activity of nanozymewas inhibited,resulting in the gradual fading of the *** on this principle,a colorimetric sensor integrated with smartphone RGB mode was *** visual sensor exhibited good linearity for norfloxacin monitoring in the range of 0.13-2.51μmol/L and 17.5-100μmol/*** limit of visual detectionwas 0.08μmol/*** the actualwater sample analysis,the spiked recoveries of norfloxacin were over the range of 95.7%-104.7%.These results demonstrated that the visual sensor was a convenient and fast method for the efficient and accurate detection of norfloxacin in water,which may have broad application prospect.

关键词： Nanozymes Cobalt-doped Fe3O4 magnetic nanoparticles Visual method Smartphone Norfloxacin

Survey of orbital dynamics and control of space rendezvous

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Chinese Journal of Aeronautics 2014年第1期27卷 1-11页

作者： Luo Yazhong Zhang Jin tang guojin College of Aerospace Science and Technology National University of Defense Technology

Rendezvous orbital dynamics and control （RODC） is a key technology for operating space rendezvous and docking missions. This paper surveys the studies on RODC. Firstly, the basic relative dynamics equation set is introduced and its improved versions are evaluated. Secondly, studies on rendezvous trajectory optimization are commented from three aspects： the linear rendez- vous, the nonlinear two-body rendezvous, and the perturbed and constrained rendezvous. Thirdly, studies on relative navigation are briefly reviewed, and then close-range control methods including automated control, manual control, and telecontrol are analyzed. Fourthly, advances in rendezvous trajectory safety and robust analysis are surveyed, and their applications in trajectory optimization are discussed. Finally, conclusions are drawn and prospects of studies on RODC are presented.

关键词： Automated control Relative dynamics equationRelative navigation Space rendezvous Survey Trajectory optimization

Algebraic solution of differential geometric guidance command and time delay control

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Science China(Technological Sciences) 2015年第3期58卷 565-573页

作者： LI KeBo CHEN Lei tang guojin College of Aerospace Science and Engineering National University of Defense Technology

According to the three-dimensional geometry of the engagement,the explicit algebraic expression of differential geometric guidance command(DGGC)is *** with the existing solutions,the algebraic solution is much simpler and better for the further research of the characteristics of *** delay control(TDC)is a useful method to tackle the uncertainty problem of a control *** on TDC,taking the target maneuvering acceleration as a disturbance,the estimation algorithm of the target maneuvering acceleration is presented,which can be introduced in DGGC to improve its ***,the augmented DGGC(ADGGC)is *** numerical simulation of intercepting a high maneuvering target is conducted to demonstrate the effectiveness of ADGGC.

关键词： differential geometric guidance command explicit expression time delay control target acceleration estimation

Translational zero-disturbance curve and its application to zero-disturbance motion planning of space manipulator system

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Science China(Technological Sciences) 2011年第5期54卷 1234-1239页

作者： LIAO YiHuan LI DaoKui tang guojin College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China

A new motion planning method is proposed for enlarging the solvable space of zero-disturbance motion planning for the space free-floating manipulator system. First, a class of translational zero-disturbance curves is put forward for the first time. The equation of translational zero-disturbance curve is deduced using the nonholonomic constraint of the manipulator system, and its characteristics are also discussed. Second, the zero-disturbance curve of the whole operating process is divided into two segments. The first one is a translational zero-disturbance curve which passes through the target point. Another one is a common zero-disturbance curve which passes through the original point and intersects with the translational zero-disturbance curve. Finally, the common zero-disturbance curve is obtained by a hybrid programming strategy based on Gauss pseudo-spectral method (GPM) and direct shooting method (DSM). The numerical simulation results indicate that the proposed method is effective, and that the solvable space of this method almost covers the whole work space of the manipulator system.

关键词： motion planning space manipulator muitibody system zero-disturbance curve

A new approach for teleoperation rendezvous and docking with time delay

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Science China(Physics,Mechanics & Astronomy) 2012年第2期55卷 339-346页

作者： ZHOU JianYong JIANG ZiCheng tang guojin College of Aerospace and Material Engineering National University of Defense TechnologyChangsha 410073China

Teleoperation rendezvous and docking can be used as a backup for autonomous rendezvous and docking (RVD) for an unmanned spacecraft or for guiding the chaser docking with an uncooperative *** inherent teleoperation time delay is a rigorous problem,especially when the chaser is teleoperated on the *** eliminate the effect of time delay,a new approach for teleoperation RVD is *** characteristics of teleoperation RVD are analyzed by comparisons with the teleoperation robot and with manually controlled RVD;the relative motion of the chaser is predicted based on the C-W equation;and the processed measure information with time delay through the Kalman filter is utilized to correct the current *** results verify that the approach produces an 18% enhanced success rate of teleoperation RVD compared with direct visual feedback,and consumes less time and *** developed approach also solves the time delay problem *** RVD using this method can be applied as a useful backup for autonomous RVD.

关键词： teleoperation rendezvous and docking (RVD) predictive display time delay

Hybrid planning for LEO long-duration multi-spacecraft rendezvous mission

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Science China(Technological Sciences) 2012年第1期55卷 233-243页

作者： ZHANG Jin LUO YaZhong tang guojin College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China

For the low-earth-orbit （LEO） long-duration multi-spacecraft rendezvous mission, a mixed integer nonlinear programming （MINLP） model is built with consideration of the , perturbation and the time window constraints based on lighting condition. A two-level hybrid optimization approach is proposed. The up-level problem uses the visiting sequence, the orbital transfer duration and the service time after each rendezvous as design variables, and employs the mix-coded genetic algorithm to search the optimal solution; the low-level problem uses the maneuver time and impulses in each rendezvous as design vari- ables, and employs the downhill simplex method to search the optimal solution. To improve the solving efficiency of the low-level problem, a linear dynamic model with J~ perturbation is derived, and the approximate strategy of the low-level prob- lem is then proposed. The proposed method has been applied to several numerical problems. The results lead to three major conclusions：（1） The MINLP model for LEO long-duration multi-spacecraft rendezvous mission is effective, and the proposed hybrid optimization strategy can obtain good solutions that satisfy time window constraints; （2） The derived linear dynamic equations are good first-order approximation to the long-duration rendezvous trajectory under ,J2 perturbation; （3） Under J2 perturbation, the long-duration rendezvous problem has multiple local minimums either in the duration of multiple orbits or in a single orbit, and it agrees with the problem＇s characteristic to use the mix-coded genetic algorithm.

关键词： multi-spacecraft rendezvous long-duration rendezvous hybrid planning rendezvous time window lighting constraints J2 perturbation

Reachable set modeling and engagement analysis of exoatmospheric interceptor

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Chinese Journal of Aeronautics 2014年第6期27卷 1513-1526页

作者： Chai Hua Liang Yangang Chen Lei tang guojin College of Aerospace Science and Engineering National University of Defense Technology

A novel reachable set（RS） model is developed within a framework of exoatmospheric interceptor engagement analysis. The boost phase steering scheme and trajectory distortion mechanism of the interceptor are firstly explored. A mathematical model of the distorted RS is then formulated through a dimension–reduction analysis. By treating the outer boundary of the RS on sphere surface as a spherical convex hull, two relevant theorems are proposed and the RS envelope is depicted by the computational geometry theory. Based on RS model, the algorithms of intercept window analysis and launch parameters determination are proposed, and numerical simulations are carried out for interceptors with different energy or launch points. Results show that the proposed method can avoid intensive on-line computation and provide an accurate and effective approach for interceptor engagement analysis. The suggested RS model also serves as a ready reference to other related problems such as interceptor effectiveness evaluation and platform disposition.

关键词： Engagement analysis Flight dynamics Interception Reachable set Spherical convex hull

Human control model in teleoperation rendezvous

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Science China(Information Sciences) 2014年第11期57卷 241-251页

作者： ZHANG Bo LI HaiYang tang guojin College of Aerospace Science and Engineering National University of Defense Technology

This paper proposes a human control model in teleoperation rendezvous on the basis of human information processing(perception, judgment, inference, decision and response). A predictive display model is introduced to provide the human operator with predictive information of relative motion. By use of this information, the longitudinal and lateral control models for the operator are presented based on phase plane control method and fuzzy control method, and human handling qualities are analyzed. The integration of these two models represents the human control model. Such a model can be used to simulate the control process of the human operator, which teleoperates the rendezvous with the aid of predictive display. Experiments with human in the loop are carried out based on the semi-Physical simulation system to verify this human control model. The results show that this human control model can emulate human operators' performance effectively,and provides an excellent way for the analysis, evaluation and design of the teleoperation rendezvous system.

关键词： teleoperation rendezvous human control predictive display phase plane control fuzzy control

Remarks on a benchmark nonlinear constrained optimization problem

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Journal of Systems Engineering and Electronics 2006年第3期17卷 551-553页

作者： Luo Yazhong Lei Yongjun tang guojin Coll. of Aerospace and Material Engineering National Univ. of Defense Technology Changsha 410073 P. R. China

Remarks on a benchmark nonlinear constrained optimization problem are made. Due to a citation error, two absolutely different results for the benchmark problem are obtained by independent researchers. Parallel simulated annealing using simplex method is employed in our study to solve the benchmark nonlinear constrained problem with mistaken formula and the best-known solution is obtained, whose optimality is testified by the Kuhn Tucker conditions.

关键词： nonlinear constrained optimization parallel simulated annealing Kuhn-Tucker theorem.

Optimal multi-objective trajectory design based on close-looped control for autonomous rendezvous

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Science China(Technological Sciences) 2011年第11期54卷 3091-3097页

作者： LI JiuRen LI HaiYang tang guojin College of Aerospace and Material Engineering National University of Defense Technology Changsha 410073 China

This paper considers the problem of optimal multi-objective trajectory design for autonomous rendezvous. Total velocity cost and relative state robustness of close-looped control are selected as the objective functions. Based on relative dynamics equations, the state equations and measurement equations for angles-only relative navigation between spacecraffs are set forth. According to the method of linear covariance analysis, the close-looped control covariance of the true relative state from the reference relative state is analyzed, and the objective functions of relative state robustness are formulated. Considering the total velocity cost and the relative state robustness, the multi-objective optimization algorithm of NSGA-II is employed to solve this multi-impulsive rendezvous problem. Lastly, the validity of the objective functions and the covariance results are demonstrated through 1 00 times Monte Carlo simulation.

关键词： autonomous rendezvous relative navigation close-looped control multi-objective robustness