基于滑模观测器的无人推力矢量飞机反步容错控制

针对无人推力矢量飞机,设计了基于滑模观测器的反步容错控制。首先提出执行器故障模型,并将本体方程分为快、慢回路,建立包含不确定性、舵面故障和执行器故障的无人推力矢量飞机故障模型,然后设计包含高阶滑模观测器及不连续投影自适应律的级联观测器实现补偿不确定性和舵面故障的状态估计,并通过滑模观测器实现故障辨识和故障参数估计,最后结合状态估计及故障参数实现包容不确定性,舵面故障和执行器故障的全局反步容错控制。大迎角机动仿真表明所提方法能够有效实现无人推力矢量飞机的全局容错控制。     

基于DFD算法的无线传感器网络故障诊断系统的设计

为了更好地了解无线传感器网络节点的分布位置及故障情况,提出了一种无线传感器故障诊断系统的设计方案.该系统采用三边测量法实现了节点的定位,使用DFD故障诊断方法实现了节点的故障诊断,并在.NET框架的智能客户端技术基础上实现了定位信息及故障信息的处理和显示.     

基于Linux/QT的火控系统故障预测的设计与实现

针对通用型火控系统故障预测问题,提出一种基于时间序列和专家系统相结合的故障预测方法,并在Linux下利用QT、MySQL设计与实现.该方法是基于概率统计的故障预测,利用历史数据进行分析,结合专家系统丰富的知识,对系统模块进行预测及结果分析.实验结果表明:这种故障预测算法实现了对火控系统有效的故障预测.     

Luenberger鲁棒故障检测观测器的设计

为了实现故障检测，在传统的Luenberger观测器的基础上，提出了一种Luenberger鲁棒故障检测观测器的设计方法及-H应的故障检测算法，并给出了在干扰存在的情况下，实现鲁棒故障检测观测器设计的充分必要条件．利用此观测器可以实现系统中带有确定性过程噪声的故障检测，且该鲁棒故障诊断观测器主要针对执行器故障的检测．仿真结果表明，该观测器可以克服噪声影响，实现鲁棒故障检测．     

基于人工神经网络的变电站故障诊断

介绍了一种利用人工神经网络（ＡＮＮ） 实现变电站故障诊断的方法,该方法充分利用人工神经网络所具有的强大的学习能力及高度的容错性等特点,实现对变电站故障元件的诊断．仿真结果表明,该方法不仅能准确地诊断出保护、开关正确动作时的故障元件,也可有效地诊断出因保护或开关拒动的越级故障时的故障元件．     

基于小波能量熵的超高压交流线路暂态保护研究

基于故障暂态量分布特征的线路保护不受系统运行方式、工频振荡等影响,对故障的判别更加快速、准确。线路发生区外故障时,高频成分在经过线路边界时发生明显的透反射效应,造成能量上的损耗,故障电流中高频含量低;而区内故障则不存在这个现象,故障电流中高频含量高。基于线路故障时产生的宽带高频暂态电流分量,利用D2小波能量谱实现故障的快速检测,并构造了小波能量熵量化描述高频暂态电流成分的能量分布,实现区内、外故障的判别。在PSCAD/EMTDC中搭建仿真模型,结果表明:该算法能很好地进行线路故障的快速检测及区内、外故障的判别,受故障类型、故障位置等因素的影响小。     

笼型异步电动机故障诊断系统设计

针对笼型异步电动机常见的气隙偏心、转子断条和匝间短路故障,开发了故障诊断系统。该系统包括信号采集、信号处理、特征提取及故障识别4个模块,气隙偏心和转子断条故障可以利用傅里叶变换后的电流数据,采用差分方法判断特征点处是否存在突变来实现,匝间短路故障可以利用派克变换后的电流数据生成图像,通过其圆度来实现。     

LabVIEW在热力站监控中的应用

介绍了小区热力站的虚拟监控与故障报警系统的建立,初步实现热力站的实时监测及节能高效的运行,并介绍了虚拟仪器及其软件开发平台在热力站自动化采集数据、参数趋势图显示及故障报警中的应用.     

闭环Boost电路电解电容的故障预测方法研究

为了实现闭环Boost电路中电解电容的故障预测,本文采用基于特征参数退化的方法,利用LS-SVM及LS算法对电解电容的特征参数序列进行预测,实现了电解电容的故障预测与剩余寿命估计.仿真及物理实验均证明了本文方法的有效性及准确性.     

输电线路故障行波测距网与输变电地理信息系统集成

介绍了输电线路故障行波测距网与输变电地理信息系统集成的结构、系统环境及实现方法,通过实例证明此种集成可精确定位线路故障点,缩短故障查找时间,提高劳动效率。     

PLC在煤仓配煤皮带自动控制系统中的应用与研究

本文介绍了采用可编程序控制器（ＰＬＣ）为核心的煤仑配煤皮带自动控制系统，详细叙述了该系统手动、集中和自动三种工作方式以及模拟显示、故障指示与报警等主要功能的实现。并在信号隔离、防尘和抗干扰方面作了较深入地研究，研制出了一台能对１２个煤仑实现全自动配煤的自动控制装置。经工业运行，达到了令人满意的效果。该系统的应用对煤炭生产自动化水平的提高起了积极的作用。     

Case study and design of steel set support for aged belt entry rehabilitation

In order to access remote reserve areas, some U.S.coal mines have to maintain aged underground entries for a great distance.However, high humidity, warm temperature, and time dependent deterioration can cause progressive roof deterioration and unexpected roof falls, and pose a great challenge to ground control engineers.With an active belt structure in place and limited space, re-bolting becomes very costly, less effective,and, sometimes, impractical and unfeasible.To gain long-term entry stability and serviceability, operators typically rehabilitate the aged belt entries by installing standing steel set supports.In the last several years,Keystone Mining Services, LLC,(KMS) has assisted many coal mines with their belt entry rehabilitation projects, evaluated the ground condition of various aged belt entries, and designed different standing steel set support systems.This paper presents a case study of a large-scale roof fall that occurred at an aged belt entry in a mine located in an eastern coalfield, analyzes root causes of excessive deformation of square sets that were installed in an adjacent entry, evaluates the adequacy of an existing rehabilitation square set, and develops remedial recommendations for future rehabilitation practice.Based on the case study, the paper outlines design guidelines for rehabilitation steel sets that include field evaluation, engineering considerations, design assumptions, steel structural analysis, and field installation quality control.     

采用ZigBee技术的皮带运输机控制人员监控系统的设计

提出一种利用ZigBee技术实现对井下皮带运输机控制人员进行管理的监控系统。设计的系统能够对井下人员的位置进行实时监控与记录,还可对设备控制人员的个人信息进行识别来管理设备的控制状态,以降低其它人员的误操作导致事故的概率。这些处理后的数据存储在系统中或通过有线及无线传输方式发送到调度室,并实时显示便于管理。     

河北省煤矿区瓦斯赋存构造控制

通过对河北省7个煤与瓦斯突出矿井、12个高瓦斯矿井、32个低瓦斯矿井煤矿区瓦斯地质特征的研究,提出了河北省瓦斯赋存构造逐级控制理论,华北板块构造控制河北省瓦斯分布,区域构造控制各矿区瓦斯分布,矿井构造控制采区、采面瓦斯.厘定出开平煤田北西翼高突带、下花园八宝山高突带、邯邢煤田鼓山东侧深部高瓦斯带和兴隆-宽城-松树台高瓦斯带4个高瓦斯带.研究表明:河北省内煤矿区高突瓦斯矿井的分布受控于EW向燕山褶皱带和NNE太行山构造带两大构造带,具有分带特征,太行山东麓的瓦斯由于深大断裂和地下水的控制而呈现"西低东高,南小北大"的态势,燕山褶皱带受燕山期NW-SE向水平挤压作用发育有逆冲推覆构造,密集发育的逆断层造成煤层叠瓦式分布有利于瓦斯的保存,80%矿井含煤地层集中在石炭二叠系,石炭二叠系瓦斯突出危险性要比侏罗系煤层大.     

PLC在煤矿胶带运输机集控系统中的应用

介绍了一种基于PLC的全矿井胶带运输机集中监控系统，该系统设置了现场控制站和一个控制主站，建立了CC—LINK通讯网络，实现了对胶带运输机系统设备的CRT集中监控，取得了提高生产效率、减少现场操作人员、提高安全性的良好效果。     

Numerical simulation and disaster prevention for catastrophic fire airflow of main air-intake belt roadway in coal mine—A case study

Coal mine belt fire develops very rapidly and is difficult to control. If not suppressed quickly, a belt fire could easily lead to airflow disorder and undermine the ventilation system. However, belt fire can be prevented effectively by establishing fire airflow control system. In this work, the 5th belt roadway of Kongzhuang coal mine was taken as the object of investigation, where geometrical models of this roadway were established firstly. Then, based on mathematical model of fire smoke flow, the CO volume fraction, smoke density distribution, air temperature and pollutant velocity vector in the roadway before and after taking airflow control measures were simulated by using Fluent software. It can be known from the simulation that with the normal ventilation status in 5th belt roadway, the countercurrent of smoke does not happen when a fire occurs; the roadway's section is almost filled with CO at 10 m downstream from the fire source, and with air velocity getting stable gradually, the CO concentration reaches about 15 %. After taking airflow control measures, the effect range of temperature field which are harmful to the miners decreases from 69 m to 30 m; and the distance of the roadway fully filled with CO is 5 m farther than that before taking measures. Finally, according to the numerical simulation results and the actual condition of the belt roadway, the warning and automatic remote airflow control system with short-circuit method for the 5th belt roadway was designed to guarantee the safety production.     

禹县煤田二叠系三煤段沉积环境与三_9煤找煤方向

禹县煤田是我国华北晚古生代聚煤盆地南带中的重要煤田之一,含煤地层为石炭～二叠系。通过对三煤段沉积特征和沉积环境分析,笔者认为它是发育在二叠纪豫西～皖北海湾中以河流作用为主的建设性三角洲的一部分,以三角洲平原和三角洲前缘沉积为主,经历了建设→废弃→建设三个发展阶段。三_9煤形成于三角洲平原过渡带,发育在由分流间湾充填而成的泥炭沼泽环境中,其厚度变化、展布方向等主要受聚煤期沉积环境的影响。     

机器视觉技术在煤矿机械上的应用

为推动机器视觉技术在煤矿机械上的应用,分析了机器视觉技术在煤炭转运的对接定位、煤仓料位测量和煤炭输送带纵向撕裂智能检测等机械上的应用情况,并对应用中应注意的关键技术问题进行了简要讨论.     

Optimal Driving of Large Belt Conveyor with Multi-roller Variable-Frequency Drive

in this paper, an electromechanically coupled mathematic model of multi-roller driving system for belt conveyor is set up, and the computing equations for dynamic displacement and dynamic tension of the conveyor are also formulated when the hoister is used for straining. Based on the belt conveyor of main inclined shaft in Chengzhuang coal mine, the driving torque, driving power and starting-speed characteristic of each electric motor are studied and measured when multi-roller variable-frequency drive (power distribution 2∶1) is used. The optimal control and the optimal starting-acceleration of the multi-roller variable-frequency drive are determined by a large number of industrial experiments and theoretical calculations.     

华北聚煤区南缘（豫皖）逆冲推覆构造带

华北聚煤区南缘发育一条由叠瓦扇分支断层和逆冲岩席组成的逆冲推覆构造带,其成因与秦岭——大别山碰撞型造山带紧密相关,属造山带北麓燕山期逆冲断裂系的前锋部分。逆冲推覆作用破坏改造了聚煤区的原始沉积边界,在逆冲推覆构造带的前缘逆冲岩席中和缓波状起伏的主滑脱面下,可望找到新的含煤块段。