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On an Eigenvalue Problem Related to the Buckling of Sandwich Beams

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Applied Mathematics and Mechanics(English Edition) 1980年第1期1卷 55-62页

作者： Hu, Hai-chang( institute of spacecraft system engineering, Chinese academy of space technology, Peking, china ) institute of spacecraft system engineering Chinese Academy of Space Technology Peking China

This paper gives various properties of eigenvalue problems related to the buckling of *** applications of eigenfunctions are also indicated.

关键词： On an Eigenvalue Problem Related to the Buckling of Sandwich Beams

Stability analysis of a hypersonic vehicle controlled by the characteristic model based adaptive controller

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Science china(Information Sciences) 2012年第10期55卷 2243-2256页

作者： ZHANG Zhao 1,2 & HU Jun 1 1 beijing institute of Control engineering,beijing 100190,china 2 Science and technology on space Intelligent Control Laboratory,beijing 100190,china beijing institute of Control engineering Beijing China Science and technology on space Intelligent Control Laboratory Beijing China

The closed loop attitude stability of a hypersonic vehicle controlled by the characteristic model-based all-coefficient adaptive controller is studied in this paper,and an algorithm based on the computation of induced matrix 1-norm or ∞-norm is *** of all,the Taylor series expansion is applied to discretize the inputoutput description of the attitude dynamics of the *** obtained difference equations have the same structure as characteristic model;thus the intervals which contain all possible values of certain characteristic model parameters are *** the linear feedback controller is used in the feedback loop,with some conservation,the closed loop system is viewed as a class of interval time-varying systems defined by a number of free time-varying *** free parameters take values from predefined *** sufficient and necessary condition for the stability of this class of system is ***,a sufficient condition for the stability of hypersonic vehicle attitude control loop is proposed and demonstration example is *** method proposed checks up the stability of the closed loop system by evaluating a finite number of matrix norms,and overcomes the difficulties brought by the time-varying nature of the characteristic model and parameter estimation.

关键词： characteristic model hypersonic vehicle interval time-varying system stability test attitude control

New development thoughts on the bio-inspired intelligence based control for unmanned combat aerial vehicle

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Science china(Technological Sciences) 2010年第8期53卷 2025-2031页

作者： DUAN HaiBin 1 ,SHAO Shan 2 ,SU BingWei 3 &ZHANG Lei 41 State Key Laboratory of Science and technology on Holistic Flight Control,School of Automation Science and Electrical engineering, beijing University of Aeronautics and Astronautics,beijing 100191,china 2 Flight Control Department,Shenyang Aircraft Design and Research institute,Shenyang 110035,china 3 beijing institute of Near space Vehicle’s system engineering,beijing 100076,china 4Integration and Project Section,Air Force Equipment academy,beijing 100085,china State Key Laboratory of Science and technology on Holistic Flight Control School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing China Flight Control Department Shenyang Aircraft Design and Research Institute Shenyang China beijing institute of Near space Vehicle’s system engineering Beijing China Integration and Project Section Air Force Equipment Academy Beijing China

Bio-inspired intelligence is in the spotlight in the field of international artificial intelligence,and unmanned combat aerial vehicle(UCAV),owing to its potential to perform dangerous,repetitive tasks in remote and hazardous,is very promising for the technological leadership of the nation and essential for improving the security of *** the basis of introduction of bioinspired intelligence and UCAV,a series of new development thoughts on UCAV control are proposed,including artificial brain based high-level autonomous control for UCAV,swarm intelligence based cooperative control for multiple UCAVs,hy-brid swarm intelligence and Bayesian network based situation assessment under complicated combating environments, bio-inspired hardware based high-level autonomous control for UCAV,and meta-heuristic intelligence based heterogeneous cooperative control for multiple UCAVs and unmanned combat ground vehicles(UCGVs).The exact realization of the proposed new development thoughts can enhance the effectiveness of combat,while provide a series of novel breakthroughs for the intelligence,integration and advancement of future UCAV systems.

关键词： bio-inspired intelligence unmanned combat aerial vehicle(UCAV) artificial brain autonomous control bayesian network bio-inspired hardware heterogeneous cooperative control

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基于STK二次开发的全球导航星座部署研究

系统仿真学报 2008年第23期20卷 6560-6562页

作者：胡伟王劼中国空间技术研究院总体部北京100094

利用C++进行二次开发,驱动STK Connect链接覆盖模块仿真研究全球星座部署策略问题,最终确定出优先覆盖我国境内的星座部署顺序。整个仿真过程分为三个阶段:链接准备和场景建立阶段、部署策略的设计和选取阶段、数据处理和评估阶段。针... 详细信息

利用C++进行二次开发,驱动STK Connect链接覆盖模块仿真研究全球星座部署策略问题,最终确定出优先覆盖我国境内的星座部署顺序。整个仿真过程分为三个阶段:链接准备和场景建立阶段、部署策略的设计和选取阶段、数据处理和评估阶段。针对不同的部署目标选取适当的评估指标,实现了不同的卫星部署策略择优。

关键词：卫星导航系统星座部署 STK 二次开发

ON THE METHOD OF LAGRANGE MULTIPLIER AND OTHERS

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Acta Mechanica Sinica 1986年第2期2卷 129-137页

作者： Hu Haichang institute of spacecraft system engineering, Chinese academy of space technology institute of spacecraft system engineering Chinese Academy of Space Technology China

The fundamentals for the correct use of the method of Lagrange multiplier arepresented and illustrated by examples. Some misunderstandings of the method are *** variational principles are defined. It is pointed out that for a given problem of mechanics,there may be many equivalent and unequivalent variational principles. The functional of the so calledgeneralized variational principles of elasticity with more general forms are linear combinations ofthe well known functionals given by Reissner and Hu-Washizu.

关键词： constrained variational problems Lagrange multiplier generalized variational principle, equivalent variational principle.

On characteristic modeling of a class of flight vehicles'attitude dynamics

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Science china(Technological Sciences) 2010年第8期53卷 2074-2080页

作者： MENG Bin &WU HongXin National Laboratory of space Intelligent Control,beijing institute of Control engineering,beijing 100190,china National Laboratory of space Intelligent Control Beijing Institute of Control Engineering Beijing China

The characteristic modeling problem of flight vehicles'attitude dynamics is considered in this *** terms of the affine nonlinear system with triangle form of flight vehicles'attitude dynamics,a general method is presented to compress the dynamics into the characteristic model parameters,by introducing the time scale of nonlinear systems and a class of system states related compress *** parameter region and limit of the characteristic model are also *** the given parameter region it is seen that the bound of the characteristic model parameters is dependent on the sampling period,the modeling error,the system order and the system change *** modeling error of the established characteristic model can be arbitrarily small according to the control precision,showing the difference between the characteristic model and other model reduction methods,that is,no system information is lost using this *** the basis of this modeling approach,the characteristic model of the flexible satellite attitude is established,as well as the bound and limit of the parameters,which sets a theoretical foundation for characteristic model based control design of flight vehicles.

关键词： characteristic modeling modeling error time scale of nonlinear systems spacecraft attitude dynamics

A NEW METHOD FOR COMPUTING RADIATED FIELD OF REFLECTOR ANTENNAS——THE CHEBYSHEV-BESSEL SERIES TECHNIQUE

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Journal of Electronics(china) 1988年第3期5卷 197-205页

作者：易力 institute of spacecraft system engineering The Chinese academy of space technology beijing

A rapidly convergent series—the Chebyshev-Bessel series for representation of thephysical optics(PO)radiation integral is developed,which is applicable to evaluating radiated field of reflectorantennas.

关键词： Reflector antennas The Chebyshev-Bessel series FFT algorithm

THE MOMENT METHOD ON RESONANT QUADRIFILAR HELICAL ANTENNAS

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Journal of Electronics(china) 1990年第1期7卷 30-36页

作者：易力 institute of spacecraft system engineering The Chinese Academy of Space TechnologyBeijing

An efficient measure is taken to rearrange Nakano’s kernels of integral equationsfor an antenna system composed of arbitrarily bent *** means of the moment method,great efforts are made to analyze and compute the circularly polarized patterns,directivity,axialratio,front-to-back ratio and beam-shaping characteristics of resonant quadrifilar helical antennasas well as the feeding technique and the effect of an electrically large conducting body on theperformance of the antennas.

关键词： Helical antennas Kernels of integral equations Moment method

The Development and Application of Combined Thermoregulatory Mathematical Models

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Journal of systems engineering and Electronics 1991年第2期2卷 55-64页

作者： Gu Dingliang and Pang Chenginstitute of space Medico-engineering, beijing 100094, china institute of space Medico-engineering Beijing 100094 China

Thermoregulatory mathematical models have being developed for more than half a century and obtained more and more wide application. Among them, the 'engineering-physiological' thermal models, which correlated closely to the man-machine-environment system, are the ones that developed most rapidly and have been widely accepted by thermal physiologists and environmental control *** paper attempts to outline briefly the development and application of such kind of thermal models, discusses how to further develop and apply various combined thermal models in practice, and puts forward four respects of suggestions for establishment and modification of combined thermal models of man-clothing-cabin environment.

关键词： Thermoregulatory mathematical model Man-clothing-cabin environment system.