Table of Content

30 June 2001, Volume 22 Issue 2

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Paper

A Study on the Dynamic Simulation of Anti-Aircraft Guns on Fire

1：Feng Changgen, Wen Bo；2：Wang Maolin, Qian Fubin

2001, 22(2):  145-148.  doi:10.3969/j.issn.1000-1093.2001.02.001

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In this paper，digital simulation is introduced in solving the shooting accuracy of the anti?aircraft gun system. Using interior ballistics theory and auto-mechanic analysis，the force acting on the gun system is solved. Then, by establishing and analyzing the finite element and/or multi-body ?model of the anti-aircraft gun system acted on by the shooting force，the system dynamic characteris?tics of the gun system and the muzzle vibration while projectiles escape from the gun tube are solved. Finally, applying theory of external ballistics, the shooting accuracy of the gun is solved. By a systematic simulation of the whole shooting process for the system, factors affecting the shooting ac- curacy can be found，and the method and results can be used to improve the design and analysis of an?ti-aircraft gun systems.

Limitations of Distributed Energy Store (DES) on a Railgun

Lu Xinpei, Pan Yuan

2001, 22(2):  149-151.  doi:10.3969/j.issn.1000-1093.2001.02.002

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A simulation of distributed energy storage on a railgun is studied. For the given parame?ters ，two kinds of energy input are considered. The result shows that the launcher efficiency cannot be improved through distributed energy storage. The paper also gives a detailed analysis on the re-sults..

Simulation.Test System of Gun Recoil and Numerical Calculations

Yao Yangwu

2001, 22(2):  152-155.  doi:10.3969/j.issn.1000-1093.2001.02.003

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On the basis of an introduction on the basic principle of the simulation test system of gun recoil，the paper establishes the numerical calculation model by combining gun recoil witn interior bal?listics according to the system’s characteristics. Numerical calculation is made for two different types of guns and its results are contrasted with test. The results oi numerical calculation show good agree?ment with simulation tests. Numerical calculation plays an important part in the simulation test.

Theoretical Study on the Dynamics of Automatic Action for Caseless Rifles

Xu Cheng, Su Guangxiong, Wang Yongjuan

2001, 22(2):  156-160.  doi:10.3969/j.issn.1000-1093.2001.02.004

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The automatic action of a caseless gun is considered as that of a multi-rigid body system. By considering the matching between the floating body and automatic action, the dynamic model for automatic action of the caseless gun is established by applying the Newton-Euler'S law. The states of motion ,energy transfer relationships , and work characteristics are analysed by using this model, thus a theoretical basis and means of analysis are provided for the design and study of this kind of automatic action.

Rules of Combustion of Deep-Deterred Oblate Spherical Powder Propelling Charge in the Bore

Xiao Zhenggang, Ying Sanjiu, Xu Fuming

2001, 22(2):  161-164.  doi:10.3969/j.issn.1000-1093.2001.02.005

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Based on the theory of potential equilibrium in interior ballistics，the paperinvestigates the actual rules of combustion of deep-deterred oblate spherical powder (OSP) propelling charge in the bore. Closed bomb tests discover that relative progressivity of burning of OSP can be realized if the total thickness of deterred layer thicKness and the deterrent concentration gradient in the propel?lant are well adjusted. Through data reduction of large-caliber gun shooting tests, the location of the point of potential equilibrium and parameters at the point of potential equilibrium are found, fhe actu?al burning gas formation function in the bore is also established. The results show that the theory of potential equilibrium leads a new path for study of the actual rules of combustion of OSP propelling charge within the bore. This investigation can be used a foundation for further studies in finding the interior ballistic solutions of OSP propelling charges corresponding to actual, rules of combustion in the bore.

Effect of Loading Conditions on the Interior Ballistics Characteristics of 12. 7mm Duplex Ammunition

Wu Zhilin, Gao Naitong, Kong Deren

2001, 22(2):  165-168.  doi:10.3969/j.issn.1000-1093.2001.02.006

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An interior ballistics process of duplex ammunition is described in general in light oi its characteristics. Computational assumptions of duplex ammunition have been presented . With the aid of the interior ballistics computational equations of the cartridge built up in reference [I], the laws of changing in chamber pressure and velocity of 12. 7mm duplex ammunition have been obtained. The ef?fect of loading factors such as the mass of bullets, the matching among the propellant masses, the starting pressure and the propellant powder density etc. on the interior ballistics characteristics has been analyzed m detail. Some important conclusions have been obtained.

Suppress Background Clutter and Detect Target Signal Real lime Via Neural Network in Proximity

Wang Yilin, Zhang Qin, Yin Qinye

2001, 22(2):  169-172.  doi:10.3969/j.issn.1000-1093.2001.02.007

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A sea clutter suppresser for higher gains in signal-noise ratio is proposed for use in radio proximity fuze. It can precisely predict background clutter and is realized through the neural network having special construction. The neural network can greatly reduce the learning time，improve the convergence speed, and facilitate hardware realization， The background clutter suppresser is capable of processing signals in real time and has a very high gain in signal-noise ratio.

Analysis and Tests on the Non-LethaI Microwave Warhead

Luo Ji, Tian Qingzheng, Jiang Haozheng

2001, 22(2):  173-177.  doi:10.3969/j.issn.1000-1093.2001.02.008

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Working principle of the non-lethal warhead of microwave project are introduced. The physical process ofxurrent amplification using an electromagnetic induction with exploding driver，and of the convertion of energy from explosive’s chemical energy to electrical energy is analyzed m detail. Experiments and analysis on the process of energy conversation from a powerful pulse current to se- lected-band microwave radiation have been carried out. Further study on the precise quantitative rela-tionship of energy convertions and relevant end effects for the microwave project are suggested.

A Model for the tiring Process of the Internal-Combustion Gasbag Submunition and Its simulation

Wang Hao

2001, 22(2):  178-181.  doi:10.3969/j.issn.1000-1093.2001.02.009

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The internal-combustion gasbag projector structure is one among the techniques with ex?tensive prospects for shrapnel dispersal. It involves the processes of propellant combustion, gasbag charging，and bullet dispersion. The paper presents a theoretical model of the firing process of disper?sal of submunitions，gives both the result of numerical simulation and that of experimental study.

A Study of Chaff Jamming to Fuzes

Liu Jingping ,Zhao Huichang, Huang Wenliang

2001, 22(2):  182-184.  doi:10.3969/j.issn.1000-1093.2001.02.010

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Chaff jamming is one of the passive jamming schemes frequently used, and more and more attention has been paid upon it by every country. This paper analyses the property of echo signal when the active fuzes are jammed by the chaff，including the voltage property and power property. As chaff jamming is influenced by many factors，statistical method is used in this analysis.

A Study on the Modularization Design of Fuse Systems

Gao Shiqiao

2001, 22(2):  185-188.  doi:10.3969/j.issn.1000-1093.2001.02.011

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Two domains of discussion in the modularization of design of a fuze system can be visual?ized ，viz. the function domain and the realization domain. Whether the system is self-conscious or non self—conscious，the functional design is always the basis and precondition for the realization design. In this paper, function modularization design and realization modularization design are discussed for individual cases of subsystems.

An Experimental Study on the Initiation of Covered Charge Impacted by Tungsten Alloy Fragments

Wang Shushan, Li Chaojun, Ma Xiaofei,Sui Shuyuan

2001, 22(2):  189-191.  doi:10.3969/j.issn.1000-1093.2001.02.012

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By means of the “lip—down”metliod，the initiation or ignition characteristics of comp. B covered with a metal plate was studied when it was impacted respectively by tungsten 93 and zirconi?um—tungsten fragments. The initiation or ignition mechanism of the charge was analyzed respectively on the two kinds of impacting projectiles. The research results show that the zirconium — tungsten fragment possesses mightier tendency than tungsten 93 in initiating the charge! The initiation of charge impacted by tungsten 93 fragments has mamiy a shock wave, while the other case has mainly a mechanics.

Separation and Identification of the Incomplete Nitration by-Products from Hexanitrohexaazaisowurtzitane

Wang Cai, Ou Yuxiang, Cheng Boren

2001, 22(2):  192-194.  doi:10.3969/j.issn.1000-1093.2001.02.013

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Using thin-layer chromatography (TLC)and column chromatography (CC) methods，the in?complete nitration staple by-products from hexanitrohexaazaisowurtzitane (HNIW) synthesized by starting with different nitrating substrates were isolated. These by-products were identified as monoacetylpentanitrohexaazaisowurtzitane (MAPNIW) and diacetyltetranitrohexaazaisowurtzitane (DAT- NIW) by FTIR, 1HNMR, MS(CI) and elemental analyses. Sample I，obtained from the nitrolysis of te- traacetyldibenzylhexaazaisowurtzitane (TADBIW) with the one-pot technique, contains about 1% MAP- NIW ,as measured by using high performance liquid chromatography (normalization condition). Sample Ⅱ， obtained from the oxodation-nitrolysis of TADBIW，contains about 5% MAPNIW. Sample Ⅲ，obtained from the nitrolysis of hexaacetylhexaazaisowurtzitane (HAIW) , contains MAPNIW and DATNIW.

Explosion Induced by a Hot Reactive Gas Pocket and Its Suppression

Fan Baochun ,Xing Xiaojiang, Li Hongzhi

2001, 22(2):  195-198.  doi:10.3969/j.issn.1000-1093.2001.02.014

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The explosion induced by a uniform hot reactive gas pocket and its suppression by inert particles are discussed numerically m this paper. A numerical technique is developed to integrate the governing equations based on a non-steady two-phase reacting flow with very disparate characteristic time. It is shown that the transition process from combustion to explosion occurs only for a suitable initial temperature of the hot gas,neither very low nor very high, to establish a temperature gradient in cold reactive mixtures surrounding the hot gas. Only if the particle concentration is larger than a critical value, can the shock waves be suppressed completely. Otherwise it may become strong again after passing through the dusty flow or will propagate steadily inside it. Small and light particles have a stronger effect on explosion suppression than large and heavy ones.

Equivalent Background Noise Property of Second Generation Image lntensifiers

1：Chang Benkang, Lei Yuanqing, Che Jing;2:Guo Liang;3:Cui Kaiyuan

2001, 22(2):  199-200.  doi:10.3969/j.issn.1000-1093.2001.02.015

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Electrode surface compositions of MCP and the MCP of second generation image intensi?fiers are studied with XPS. I he results show that one of the equivalent background noise sources in second generation image intensifiers comes from the impurities K，Na，Cs and Pb existing on the elctrode surface of the MCP，and the impurity content attains 9. 69%. Pollution of alkali metal can be controlea by a heater that controls the flow field of alkali metal vapor when the photocathode is pre?pared. In this way a 5. 06 signal/noise ratio for the second generation image intensifiers can be achieved.

An Analysis of Unstable Resonator Having Its Beam Rotated with 45° Crossed Right-Angle Reflecting Mirrors

1：Fu Lei；2：Zhang Qingquan；3：Zhang Lingxiang,Lu Yaudong,Ni Shouyong,Shi Hongmin

2001, 22(2):  201-205.  doi:10.3969/j.issn.1000-1093.2001.02.016

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Geometric properties of a beam rotated with a 45° crossed right-angle reflecting mirror are presented，and the mode analysis and calculation are given via the matrix method for the perfectly aligned unstable resonator ,while the stability of the misaligned optical resonator is investigated. The possibility oi improving the beam quality and stability optical resonators is discussed.

Modeling of Passive Acoustic Sensing with Four-Sensor Array for Target Localization

Jia Yunde*, Leng Shulin**, Liu Wanchun*,Pei Hong'an**

2001, 22(2):  206-209.  doi:10.3969/j.issn.1000-1093.2001.02.017

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A general positioning model of passive acoustic square array with four sensing elements is presented. Several typical arrays such as the planar array, solid-symmetric square array and solid- asymmetric square array are compared for finding out the most practical and compact array struc?ture. The numerical simulation result leads to the optimal structure for passive acoustic square array with four sensing elements.

An Internal Model Controller with High Order Zero Static Error Characteristics

Chen Qingwei, Guo Yu, Hu Weili

2001, 22(2):  210-213.  doi:10.3969/j.issn.1000-1093.2001.02.018

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A Kind of control scheme that can easily realize high order zero static error characteristics is presented，based on internal model control (IMC). Theoretical analysis of its robustness stability and zero static error tracking performance are studied. Simulation results show that the two port con?trol system can realize high accuracy tracking for input signals having high-speed and high-accelera- tion.

A Study on High-Quality Hign Power InGaAsP/GaAs Lasers Grown by Liquid Phase Epitaxy

Yang Jinhua, Gao Xin, Li Zhonghui,Wu Genzhu,Zhang Xingde

2001, 22(2):  214-217.  doi:10.3969/j.issn.1000-1093.2001.02.019

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High power InGaAsP/GaAs semiconductor lasers have been grown by liquid phase epi?taxy. Measurements and theoretical analysis showed that the SQW SCH grown by the method is of high quality and is in good agreement with the design.

A Study on the Method of Laser Power Matching in a Rapid Prototyping Alterable Length Laser Line-Scanning System

Chen Hong, Zu Jing, Cheng Jun

2001, 22(2):  218-221.  doi:10.3969/j.issn.1000-1093.2001.02.020

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In a rapid prototyping alterable length laser line-scanning system, the matching of laser power with the length of line is one of the important factors affecting prototyping quality. In this pa?per ,aimed at the features of a rapid prototyping alterable length line-scanning system, the model of action for laser scanning line to prototyping material is analysed. On the basis of analyzing all factors affecting the effect of power matching，the paper puts forward a matching method suitable to the tech?nology of alterable length line-scanning rapid prototyping.

Determination of Bearings of Sound Source with Sound Pressure Gradient Based on Higher Order Spectra

1:Liu Xun, Xiang Jinglin, Zhang Xiaomin;2:Shen Yuanhai

2001, 22(2):  222-225.  doi:10.3969/j.issn.1000-1093.2001.02.021

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Determination of the bearings of sound source with the sound pressure gradient is a new method put forward by the authors. The method has system errors (determinate errors) and random errors. A method based on higher order spectra is proposed to reduce the random error when the in?terfering noise is u-aussian while the source signal is non-Gaussian. As a result of the non-sensitivity of higher order spectra to the Gaussian noise, the detrimental effects of interfering noise can be sup?pressed. simulation results show the effectiveness of the new method.

Nonuniformity of Pixels ana Its Correction for Scientific Grade CCD Cameras

Chen Shuyue, Lu Hongnian*, Zhang Pizhuang, Yang Qiaoning

2001, 22(2):  226-229.  doi:10.3969/j.issn.1000-1093.2001.02.022

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Scientific grade CCD camera has become an important device for image intensification un?der low level illumination and photo-electric conversion. In view of image quality，characteristics of nonuniform area CCD pixels and correction of the nonuniformity are studied with scientific grade CCD cameras as the objective. It is shown that CCD nonuniformity is the major factor leading to image degradation，and its correction is an important approach towards improvement of image quality.

Launching Behavior of a Large Spinning Vehicle with Nonlinear and Nonsymmetric Supports

Zhu Huailiang

2001, 22(2):  230-233.  doi:10.3969/j.issn.1000-1093.2001.02.023

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Taking a large, long-range spinning rocket as an example，the launching behavior of the vehicle is studied. The venicle is modeled as a Euler-Bernoulli rotor with multi-nonlinear and nonsym- metric supports, coupled motion equations describing the dynamic characteristics are established by the finite element and Hamilton methods. A numerical solution is developed, and the influence of thrust misalignment, dynamic unbalance 9 structural flexibility and nonlinear characteristics of the support on the Venicle'S launching attitude is analyzed. This research will provide a useful theoretical reference in the design of new types of large spinning vehicles.

Method of Life Reliability Confidence Analysis on Small and Zero Failure Samples

Li Baosheng, He Hongqing

2001, 22(2):  234-237.  doi:10.3969/j.issn.1000-1093.2001.02.024

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Many product systems are expensive and required to be highly reliaole. Their test sam?ples for working life are bound to be small sized and zero-failure. Evaluation of the working life relia?bility of such systems is urgently required m engineering practice. This paper brings forward the con?fidence interval formulae of the life reliability based on small arid zero-faiiure samples. Examples for calculating ana analyzing the reliability confidence bounds of the system’s worKing life in different samples are given. Some useful conclusions on evaluating the working life reliability are elicited.

Bayesian Assessment for Product Reliability Using Pass-Fail Data

Zhang Shifeng ,Fan Shujiang, Zhang Jinhuai

2001, 22(2):  238-240.  doi:10.3969/j.issn.1000-1093.2001.02.025

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Bayesian assessment for product reliability using pass-fail data is discussed. Various in?formation during product design and improvement is appropriately considered by introducing factors of inheritance. Further, the inheritance factor is thought as a random variable, and posterior density function of product reliability is obtained. Results from simulation show that confidence lower limits of product reliability are too conservative according to classical methods using small binomial samples. Although traditional Bayesian analysis can consider test information from related or similar products, it ignores differences between such products. The methods proposed, in this paper consider not only the testing information from related products but also differences between such products，so the conclu?sion following them is reasonable.

Noether Symmetry of Differential Equation Models in Warfare

Ge Weikuan, Mei Fengxiang

2001, 22(2):  241-243.  doi:10.3969/j.issn.1000-1093.2001.02.026

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A system of ordinary differential equations is expressed partially by the form of canonical equations. The conserved quantities are obtained by the invariance of Hamiltonian action under the in?finitesimal transformations. The Noether symmetries and conserved quantities of some differential e- quation models in warfare are studied by the general theory.

Synthesis of Nanocrystalline SnO2 by Precipitation

1:Dong Xiangting, Tian Honeyuan, Zhang Wei ,Liu Guixia, Hong Yuanjia;2:Hong Kjuangyan

2001, 22(2):  244-247.  doi:10.3969/j.issn.1000-1093.2001.02.027

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Nanocrystalline SnO2 of different sizes were prepared by the reverse dropping precipita?tion method using ethynol as the dispersive and protective reagent. XRD patterns showed that the syn?thesized SnO2 was amorphous when calcination temperature was below 200°C; but when calcination temperature reached the range of 400 ?800 cC，the prepared SnO2 was nanocrystalline with single?phase ,and was tetragonal in structure with space group P4/mnm. TEM photos revealed that the SnO2 nanoparticles were spherical m shape，and the mean sizes of SnO2 particles increased with the in?crease of calcination temperature. Weight loss analysis indicated that the weight loss of precursor mainly depended on the calcination temperature，but little depended on the calcination time. Measure?ment of relative density showed that the relative density of SnO2 nanocrystalline powder increased with the increase in SnO2 crystal sizes.

Valence Electron Structures Criterion of Embrittlement of Intermetallics

Zhi Wen

2001, 22(2):  248-251.  doi:10.3969/j.issn.1000-1093.2001.02.028

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According to the empirical electron theory (E. E. T. ) of solids and molecules，an electron structures parameter ——the uniform deformation factor α is proposed . Values of α have been calcu?lated by the valence electron structures for Ti-Al and Fe-Al systems. It is found that the value of α has a good correspondence with the ductility δ. The nature of embrittlement of intermetallics is thus explained，and an empirical embrittlement criterion induced.

Short Papers

An Analysis on the Geometrical Firing Data (GFD) Error of Self-Propelled Guns Positioned by GPS

Yang Bozhong ,Min Jianping, Cheng Yunsheng

2001, 22(2):  252-255.  doi:10.3969/j.issn.1000-1093.2001.02.029

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This paper presents an analysis for the geometrical firing data (GFD) error in self-pro?pelled gun systems positioned by GPS. In general the observable vehicle and the gun system are positioned by GPS. As the measured target errors and the geometrical data errors are given，the function?al relationship between GFD and factors such as GPS positioning accuracy，range and angle for obser?vation and gun are determined. Some steps to lessen the errors of GFD are shown. The work suggests a direction in improving firing accuracy.

Neural Network-Based Tracking Control of Robot Manipulators

Niu Yugang, Yang Chengwu

2001, 22(2):  256-259.  doi:10.3969/j.issn.1000-1093.2001.02.030

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This paper proposes an neural network-based tracking controller for robot manipulators. In this scheme，a radial basis function neural network is used to approximate the unknown nonlinear dynamics of the robot manipulator and a compensator based on sliding moae control technique is de?signed to eliminate the effects of network approximation error and external disturbance. The weight adaptive laws based on Lyapunov analysis approach can ensure the convergence of the algorithm. The control scheme can guarantee the stability of closed-ioop system and the asymptotic convergence of tracking errors.

Experimental Techniques and Analysis

Elimination of the Clearance between a Composite Charge and Bottom of the Shell

Meng Lifan, Hou Wen, Liu Shuangfeng, Guo Jianwen

2001, 22(2):  260-262.  doi:10.3969/j.issn.1000-1093.2001.02.031

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This paper introduces a technique for the elimination of clearance between the explosive charge and the bottom of shell, besides a testing method adopted for the process is given. Based on the heat-transfer equation and the constitutive relationship of pseudo-plastic fluid，the paper gives an analysis on the mechanism of the technique，on wmch further design of the automation on the process can be based.

A Study on the Method of Calibration for Transient Surface Temperature Detectors

1：Liang Lieguo；2：Zhou Hanchang, Zhao Dong'e ,Pan Deheng

2001, 22(2):  263-265.  doi:10.3969/j.issn.1000-1093.2001.02.032

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A dynamic calibration system for transient surface temperature detectors is introduced. In this system a pulse laser and a continuous laser are used as the excitation sources. Static and dy?namic calibrations are carried out，respectively，with the use of the continuous CO2 laser and Nd-glass pulse laser. Several quick response thermocouples have been tested on the system. The experimental results show that this calibration system can be used to callDrate transient surface temperature detec?tors with a time response reaching an order of microseconds.

Research Notes

Computer simulation of Power Performances for Tracklayers

Bi Xiaoping, Chen Ce ,Zhang Gengyun, Han Shu， Ma Zhixiong

2001, 22(2):  266-269.  doi:10.3969/j.issn.1000-1093.2001.02.033

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A computer simulation model for the power performance at the stable and transient working conditions for tracKlayers has been developed. It consists of a power device submodel and a transmission submodel, and can demonstrate the maximum speed，driving force, driving resistance， climb angle and various travel processes of the vehicle, cumulation calculations have been carried out for a tracklayer vehicle. The calculated results accord well with the measured values. The simulation method can be used conveniently for the study of power performance of tracklayers.

A Study on the Nonlinear FEM Dynamic Simulation of Self-Propelled Guns

Chu Zhiyuan ,Yang Guolai, Chen Yunsheng

2001, 22(2):  270-272.  doi:10.3969/j.issn.1000-1093.2001.02.034

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In this paper，the equations of artillery dynamics are formulated in a nonlinear FEM style. Some numerical methods for nonlinear equations are discussed. The Newmark method, being unconditionally stable，is considered to be the best one for the solution of these nonlinear equations， and a way for the determination of the time steps in the Newmark method is presented. Some prospects are finally given on the study of nonlinear FEM dynamic simulation for self-propelled guns.

Simulated Calculation of One Dimensional Blasting in Air

Wang Cheng, Du Zhiming ,Ding Yukui,Xu Youwen

2001, 22(2):  273-275.  doi:10.3969/j.issn.1000-1093.2001.02.035

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In order to provide guidance for the design of many kinds of non-lethal bombs，based on classical interior ballistics’ and small charge explosive trait, a mathematical model is established and design simulation program is provided for ID blasting in air. A simulation calculation is finally given as an example.

A Study on the Damage of a High Explosive Projectile to a Tank

Li Xiangdong, Zhang Yunfa, Zhao Guozhi

2001, 22(2):  276-279.  doi:10.3969/j.issn.1000-1093.2001.02.036

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When a high explosive projectile explodes，there occurs the distribution and propagation of two kinds of damage elements ： fragmentation and shock wave. The damage done to critical compo?nents of the tanK is analyzed m tms paper. The damage model of a high explosive projectile to a tank is established. For the example of a high explosive projectile, damage done to a tank is calculated when the projectile explodes near the tank or hits it.

Adaptive Variable Structure Guidance Law for Passive Torpedos

Gao Lei, Xu Demin ,Ren Zhang

2001, 22(2):  280-283.  doi:10.3969/j.issn.1000-1093.2001.02.037

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In connection with the low accuracy of parameters that is attained for laws of guidance in the passive underwater environment, an adaptive variable structure guidance law (AVSGL) for pas?sive torpedos is studied in this paper. Based on rigorous theoretical deduction and simulation results， it is seen that the guidance law is highly robust to noise and parameter disturbance. Simulation studies show that the AVSGL performs nigh guidance accuracy even though the target maneuvers. Further more，it is ready to implement and convenient for engineering applications.

3D Guidance Law for a Torpedo Impacting Vertically on the Target

1:Wang Shuchu, Lu Hanxing;2:Xiao Changmei ,Wang Lijun

2001, 22(2):  284-287.  doi:10.3969/j.issn.1000-1093.2001.02.038

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Optimal guidance law for a torpedo impacting vertically on a maneuvering evader in three dimensions is studied. First ,the nonlinear model of intercept geometry is transformed into a fuzzy T-S linear model. Second，with the help of RH control technique and the adjoint technique, the vertical?ly impacting guidance law in 3-D is derived while the evader maneuvers. Results from simulation de?notes that high impacting precision，Doth cartesian and angular，can be attained by this guidance law.