Abstract:Supplying the reliable uninterrupted power to electric load is the basic target of avion's electrical system.An effective method is to use the multi-transfer technology and fault tolerant power supply technology in the system.The model technique route,the capability target,the key technology and the advantage of this system used by the developed countries is summarized in this article.At last,the authors point out this technology trend.

Abstract:The study has shown the design of a symmetrical five-port waveguide junction working within the bandwidth from 9 GHz to 10 GHz. For the five-port waveguide junction properly works in a six-port reflectometer, the absolute value of the reflection coefficient of every port must be less than 0. 1. The study has applied the frequency shift method the cutting taper apart method and the mathematic analysis to design a symmetrical five-port waveguide junction.

Abstract:The characteristic of the feed forward neural network and training algorithm based on the recursive prediction error are introduced. The magnetic course error of a certain course synchronous transmission system is revised by use of the feed forward neural network and the experimental result is given.

Abstract:Based on the traditional non-destruction ultrasonic testing,the ultrasonic echo signal is decomposed into different parts according to the frequency by using wavelet transform.Through analysis of the welding interface echo and the base face echo within the different bandwidths and combining the influences of different interface type on ultrasonic transmition,the explosive welding plate's interface is discerned.The method of testing the quality of titanium-steel explosive welding plates is concerned. The test conclusion shows that this method is valid for the non-destruction testing of titanium-steel explosive welding plate and has the advantage of convenience,short inspecting periods and non-destruction.

Abstract:Pointing to the phenomenon of clipped data due to vibrant data of a plane beyond the original scope,this paper introduces the regression analysis method and cubic splines interpolaton method.Through using the two methods to resume the clipped data,the cubic splines interpolaton's error is small.The cubic splines interpolaton method completes the resumption work of clipped curve successfully.

Abstract:The unitary flexible hinge stiffness exists some technical problems in the manufacture and measurement of the stiffness. Because the performance of flexible hinge directly influences the performance of spaceflight, it is urgent and important to improve the measurement equipment. The automatic testing apparatus of flexible hinge has been developed.

Abstract:This paper introduces the background and significance of the computer integrated test system for aviation electromotor, then presents its testing parameters, testing principles and methods. The hardware composition and function of every part of the testing system has been presented in detail. At last, it discourses upon the hardware makeup and function as well as the software environment, function and significant arithmetic of the testing system.

Abstract:In this paper,the fault diagnosis technology based on back-propagation neural network information fusion is investigated.The technology of information fusion is used in the anti-ship missile's pitch synthetic amplifier circuit board fault diagnosis and a new improved BP neural network algorithm is used in data fusion,Finally the experimental results show the good performance.It is shown that the uncertainty of circuit board component fault diagnosis can be solved fairly from the fusion result.

Abstract:A high-speed data acquisition system is designed and realized in this paper for electronic cabin signal group acquisition, including the analog input, signal adjustment, A/D conversion, digital data transfer and storage and computer interface etc. And the index of the performance fits the requirement of the acquisition system for the real time high speed acquisition of the electronic cabin signal group.

Abstract:During the manufacture process it's very important to control and measure the homogeneity of glass for ensuring the quality of the glass.The optical method of the homogeneity measurement is applied during float glass manufacture.The experimental results show that the clear optical homogeneity image of the sample of float plate glass can be got by the imaging system using parallel polarization ray of light and the CCD image manipulation,and the light intensity curve can be analyzed quantitatively.Thus the realiable basis can be supplied for the quality evaluation and technology control of the glass.

Abstract:In this paper, the measurement methods for three kinds of parameters of low frequency noise generator are described. Some realization ways of measurement are discussed, including the maximum output power, output amplitude and noise bandwidth.

Abstract:The article introduces a new differential pressure device, inner venturi tube, including its structure, principle of measurement and technical performance ; According to the measurement principle of differential pressure flowmeter, the mathematics model for calculating the flow rate of acid gas is established and the inner venturi tube flowmeter is aplied to the flow rate measurement of acid gas successfully.

Abstract:Combining with the requirements of the verification regulation and begining with the measurement principle, method and uncertainty analysis, the comparison of the two verification methods for the one measuring-process standard deviation in horizontal direction has been done.

Abstract:The calibration method of the dry-well calibrator is studied in this paper, from its particularity by explaining the inapplicability of existing regulation and some factors of effecting the temperature field of the dry-well calibrator. And then a practical calibration method for the dry-well calibrator has been sumed up.

Abstract:介绍了方波阶跃沿上升时间的测量不确定度分析和评定过程.讨论了主要的不确定度来源,包括测量仪器上升时间及其误差、幅度测量误差、上升时间区间端点处波形曲线幅度随时间变化率的影响等,给出了减小不确定度的主要措施.结合一个实例,给出了上升时间的不确定度评价结果.

Abstract:The structure and calibration theory of a constant pressure gas micro-flowmeter are introduced.On the basis of thermal transpiration effect experiments of capacitance diaphragm gauge(CDG), the uncertainties of constant pressure gas micro-flowmeter are strictly evaluated.And the expanded uncertainties and coverage factors are also given.Through the leak-rate comparison with PTB using standard leak,the reliability of uncertainty evaluation results has been verified.

Abstract:The definition measurement characters are of pulse amplitude, the methods of measurement of pulse amplitude and discussed in this paper. In addition, the uncertainty of. measurement of pulse amplitude is evaluated.

Abstract:This paper describes the characters of IVI drive program, construction of testing system and progress of MAX configuration on IVI instruments. The realization means of IVI programming in LabVIEW is also introduced in this paper.

Abstract:In-Chip configuration modes and configuration files of FPGA,based on SRAMLUT structure,are presented,and one of them,passive serial configuration method(PS mode) is selected finally in this system.Also,in this embedded system,using ARM7TDMI micro-processor to produce FPGA configuration clock is proven available.A Mini-application system,with codes related,and analyzing how to generate FPGA configuration clock,is given.The result of the paper shows the design could be realized in practice.

Abstract:A system used for on-line measurement and fault diagnosis of aircraft power supply system is designed. It is based on DSP, CPLD, FIFO and USB. It provides a powerful testing and analyzing tool for APSS. This paper introduces multi-channel and high speed data acquisition and analysis technique and methods of fault diagnosis. This system is universal, expansible, and has an extensive application perspective.

Abstract:This paper introduces the status of the special equipment for assembly and testing product line, and researches the management of special equipment for product line, then discusses the special equipment naming rules, designing principle, management of equipment data, equipment calibration and equipment maintenance.