动态测试

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

Aiming at the dynamic performance of frequency tracker designed specifically for laser Doppler velocimeter, the analysis was accomplished and some results of the experiments are presented.

针对激光多普勒测速仪常用信号处理设备———频率跟踪器，采用实验方法分析了其动态响应特性及影响因素，发现其动态响应参数并不能全面反映其在实际测试中的动态响应能力，实际测试中的动态响应能力明显低于通常的估计。

This paper introduces the research and implementation of all-purpose high-speed test adapter for ADC. The main contents includes two methods about how to testing the static parameters and dynamic parameters for ADC. The servo loop method is proposed to static parameters, by using the test principle of high-precision voltage source, high-precision voltage meter and digital comparator. To dynamic parameters, the DDS chip of AD9851 is used to generate sine waves with high signal to noise ratio, then the high-s...

servo loop ； FFT ；本文介绍了关于ADC高速通用测试适配器的研究和实现，主要介绍了测试ADC芯片静态参数和动态参数两种方法，针对静态参数，提出了用伺服环的方法，采用高精度电压源，高精度电压表和数字比较器的测试原理；针对动态参数，提出了用DDS芯片AD9851产生高信噪比的正弦波，采用高速采样模块采集数据，最后用FFT算法对采集的数据进行处理。

Based on measurement error, adaptive weighted fusion algorithm was used to integrate the data from two kinds of sensors to evaluate the dynamic orientation of rice transplanter.

在此基础上，提出利用自适应加权融合算法，融合电子罗盘和微机械陀螺信息，实现农业机械航向角度的动态测试与精确估计。

In swinging of hurdle step, the crura muscle of special and non-special event athlete can be assessed through electromyography by using the MEGA6000 electromyogram system.

采用MEGA6000肌电测量系统，对专项与非专项跨栏运动员在跨栏步摆动腿动作中的下肢肌肉进行肌电动态测试。

A "hot-whirl" test stand was established for dynamic testing of XV-1 rotor blades and tip combustors Fig.

&热，发晕&试验台，建立了动态测试的第XV - 1旋翼桨叶和提示燃烧室（图11 ）。

Surface temperature control of paper machine driers used to produce 6μ capacitor paper is discussed in this paper. Mathematical model of the controlled plant is obtained by means of dynamic measurement and theoretical analysis.

对于生产高级电容器纸的烘缸表面温度的最佳分布和最优控制的问题，本文用机理分析和动态测试相结合的方法求得了数学模型；设计了前馈-反馈最优控制系统。

Based on the analysis of the pitch error measure theorem for screw,the dynamic measure system of pitch error for lead screw constituted by single-chip microcomputer is discussed.

在分析丝杠螺距误差测量基本原理的基础上，简述了由单片微机组成的滚珠丝杠螺距误差动态测试系统，并开发了计算机辅助自动分析测控软件。

Tacking stitching quality of lockstitch sewing machine ;2. The Research on Current Sensorless AC-servo Drives in Lockstitch Sewing Machine;3. This paper aimed at the characteristics of the needle bar mechanism s motion of lockstitch sewing machine making for air bag fabric,drew out the whole motion diagram of the needle bar mechanism,and making an equal replacing about it.

提出了一种应用优化平衡对高速平缝机振动及噪声控制的方法，在动态测试的基础上，利用功率密度谱分析，正确诊断出高速平缝机振动及噪声源；采用优化计算技术，调整构件的质量分布，实现机构及机构系统的惯性力和惯性力矩的最佳平衡，最终达到减振降噪的目的。

In the model the collector is regard as a system, the outlet temperature is the system output, the other variables: the inlet temperature, the ambient temperature and the solar irradiance on aperture plane per unit area are the system inputs.

中文摘要本文以U型管全玻璃真空管太阳集热器为研究对象，在分析太阳集热器传热机理和管内流体温度分布情况的基础上，根据能量平衡和传递函数理论，对侯宏娟的集热器动态测试方法的数学模型进行改进。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。