故障检验

Machinery noise fault diagnosis wavelet transform composite hypothesis test

机器噪声；故障诊断；小波变换；复合假设检验

This paper presents a study on the pricinple of the effective fuel consumptionunloaded dynamometry,the relationship between effective fuel consumption andpower of desel doesn t change with its technical condition,Pricision and suitability of EFCUD were verifyed on hydraulic dynamometer and movable hydraulic torquemeter.

研究了有效油耗无负荷测功技术的基本原理──柴油发动机的功率和有效油耗之间存在着不以其技术状态而变化的规律性；通过模拟故障的方法检验了该法的适应性，并通过工厂台架试验和田间测试2种方法检验了该法的精度。

Simulate the real network failure by the way, testing maintenance personnel Quanchengquanwang deal with problems of coordination and rapid response capacity and coordination of the various professional capacity.

通过模拟真实网络故障的方式，检验维护人员全程全网处理问题的协调能力、快速响应能力和各专业协同作战的能力。

The redundant controller produces odd and even check code in setup time. After odd and even check code is calculated with Boolean function calculation, it is transformed into of Galois field. If the output of controller can satisfy odd and even check condition is checked with the function calculation to decide it exist fault or not.

该控制器在设定时间产生奇偶校验码，通过布尔函数逻辑运算转换成Galois域函数运算，检验其输出是否满足奇偶校验条件以判断是否存在故障。

Meanwhile, the shortcomings of BP networks when it is used to predict the time series with definite increasing or decreasing tendency are pointed out.

利用对几种汽轮机典型故障趋势的模拟数据及某两台200MW汽轮机运行的实际测量数据，对本文所提出的递推合成BP网络的预测性能进行了检验。

Generalized Likelihood ratio Test and Optimal Parity-vector Test methods to detect and diagnose soft faults from sensor redundant measurement system in SINS are researched very carefully from a point of view of their effectiveness to detect and isolate soft faults.

对SINS中冗余配置的传感器量测系统的软故障，研究了目前常用的广义似然比检验和最优奇偶向量检验方法，主要讨论两种方法的有效性问题。

Little offset fault ; fault detection ; Kalman filter ; sequential probability ratio test

小偏置量故障；故障检测； Kalman滤波器；序贯概率比检验

At last a FDD tool is programmed based on ANN with experiment results which formed training stylebook and test stylebook.

论文的最后在实验基础上，整理出故障训练及检验样本，编制了基于人工神经网络的故障诊断程序。

At the same time, on the base of analysis of the present situation, the development trend and the leading edge technology, the necessity and feasibility about the exploitation of the full hydraulic bulldozer"s sate monitoring and fault diagnosis system is given; According to the structure, working feature and working environment, it works out system schema and system composition; The system is divided into display module, communication module and fault diagnosis module by means of block design, the implementation method and key parameter are also given; In light of the features of the full hydraulic bulldozer, the state monitoring and fault diagnosis platform composed of controller RC6-9 and display DI2/10 is designed based on CAN-Bus and the hardware design is completed; It lists the measured values and state of monitored parameters which should be real-time displayed in monitoring module as well as the data which will be transmitted; Furthermore, On the base of the study of, it gives 34 kinds of constant faults" diagnosis methods; Using BODAS software and DPS software, it compile the program code of the controller and the displayer; At last, this paper design and make the simulation test device of control system of construction machinery, through the experiment, the realizability, the categoricalness, the reliability, the stability and real-time are tested, in addition, the improved methods are given.

本文收集整理了国内外智能推土机研究的相关文献资料，综合分析了国内外智能推土机的研究现状、发展趋势和前沿技术，论证了开发全液压推土机智能系统的重要组成部分&全液压推土机状态监测与故障诊断系统&的必要性和可行性；根据全液压推土机的结构、作业特点和作业环境，制定了全液压推土机状态监测与故障诊断系统方案，确定了系统的结构组成；采用模块化设计方法，将整个系统分成了显示、通信和故障诊断三个模块，给出了各模块功能的实现方法，确定了各模块的关键技术参数：选用RC6-9和DI2／10作为系统的控制器和显示器，用CAN总线搭建了系统的通信平台，完成了系统的硬件设计；确定了系统监测参数和通信数据，对全液压推土机常见故障特征进行了分析，给出了34种常见故障的诊断方法；在BODAS软件和DPS软件的集成编程环境下，编写了控制器和显示器程序；设计并制作了工程机械控制系统模拟试验板，并在此基础上通过多次的程序调试与试验，对所设计的全液压推土机状态监测与故障诊断系统功能的可实现性、完备性、可靠性、稳定性和实时性进行了检验，证实了此系统的可行性，并提出了进一步的改进方案和措施。

So during the collection of fault sample data and checking data, the paper sets up the mathematics model of control system first. We cause all kinds of fault in the control system, then collects a variety of fault data. After unitarily dealing, the fault data server as the sample data of training neural network. At the same time, according to the collection of checking data, it examines whether the trained neural network have the function of fault diagnosis.

在故障样本数据及检验数据的采集过程中，首先建立了控制系统的数学模型，人为地让控制系统发生各种故障，从而采集到各种故障数据，经过归一化处理后，作为训练神经网络的样本数据；同时，也采集检验数据，用以检验训练出的神经网络是否能够起到故障诊断的作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。