汽车蓄电池工作原理及典型故障分析

简要介绍和分析了蓄电池的基本结构和工作原理 ,并对松花江微型车进行了典型故障分析     

基于Bech模型的船舶航向自抗扰控制器设计与仿真

基于船舶非线性Bech模型提出了一种新型船舶航向控制器——高阶自抗抗控制器(ADRC),该控制器主要由三阶TD、四阶ESO和非线性状态误差反馈(NLSEF)三部分组成.设计扩张状态观测器时,采用二阶TD的滤波功能对系统输出进行噪声滤波,并用其滤波值来建立扩张状态观测器.通过航向改变、参数摄动、外界干扰的仿真试验表明,自抗扰控制器控制效果良好,具有较强的鲁棒性.     

一座钢-混凝土连续结合弯梁桥的施工监测

一座钢混凝土结合梁铁路弯桥,位于半径为300m的圆曲线上,采用(45 82 45)m的跨径组合,结构体系复杂,施工技术难度大,施工监测是该桥安全施工的重要保证措施。施工过程监测成果检验了桥梁的设计和施工方法的合理性,也为今后同类工程的设计与施工提供了借鉴参考。     

DYNAMIC HUNTING EXTREMUM CONTROL METHOD BASED ON MEASURE AND ESTIMATION

Anextremumcontrolsystembasedoncommonhuntingmethods[1 ] cannotworkwellforindustrialprocesses:becauseofthesysteminertialandtimedelayinfluences,thesystemwillbecomeoscillat ing ,workinwrongstepsorwillbehuntingforalongtimefortheworking process.Thepreviousmethod[2 ] canonlyapplytothesystemthathasafastdynamicprocessoritsdynamicresponsecanbeignored .Thispaper proposedadynamichuntingmethod differencepre estimationandcomparisonmethod .Thismethodcanbeusedinsecond orderorhighordersystemswithlargetimecons…     

A NEW SYSTEM DYNAMIC EXTREMUM SELF-SEARCHING METHOD BASED ON CORRELATION ANALYSIS

Inindustrialprocessesself searchingoptimumcontrolsystemshavebeenwidelyused ,becausetheydonotneedamathematicalmodel,whichhaveblockdiagram (seeFig .1) .Theprincipleistomakethecontrolsystemreachitsoptimumoperatingstatebycontinuousmeasuringandcontrolling.Thenec essaryconditionisthattheplantsmusthaveanex tremumcharacteristic[1 ] .Thekeyofself searchingoptimumcontrolishowtofindthesystemextremum pointautomati cally .Therearemainlytwokindsofself searchingmethods,whicharethecontinuoussearchingandthest…     

利用CAN控制器SJA1000实现远距离串行通信

介绍了16位单片机INTEL80C196KC与CAN（Control Area Networks)控制器SJA1000的硬件接口及用于远距离串行通信的软件设计。     

浅谈高等级公路养护机械化

介绍了高速公路养护机械的标准配合 ,及冬季养护应具备的设施 ,并就此与德国做了对比 ,据我国实际情况提了一些建议和看法。     

基于遗传算法的塑焊机PID温控系统

针对塑焊机温度控制，提出了一种基于遗传算法寻优的PID控制方法。该控制器以系统误差控制输出上升时间和超调量构成的函数为性能指标，利用遗传算法全局搜索能力获取一组最优的PID参数KP，Ti，Td，并且能根据实时获取的误差在线调整参数。应用结果表明，该温度控制器具有良好的动静态特性和鲁棒性。     

滨海新区西中环跨海河大桥方案设计

现代城市的发展对桥梁在美学上提出了更高的要求,该文简要介绍了西中环跨海河大桥方案的总体构思、桥型布置、主体结构、美学理念等。     

Hardware architecture design of block-matching and 3D-filtering denoising algorithm

Block-matching and 3D-filtering(BM3D) is a state of the art denoising algorithm for image/video,which takes full advantages of the spatial correlation and the temporal correlation of the video. The algorithm performance comes at the price of more similar blocks finding and filtering which bring high computation and memory access. Area, memory bandwidth and computation are the major bottlenecks to design a feasible architecture because of large frame size and search range. In this paper, we introduce a novel structure to increase data reuse rate and reduce the internal static-random-access-memory(SRAM) memory. Our target is to design a phase alternating line(PAL) or real-time processing chip of BM3 D. We propose an application specific integrated circuit(ASIC) architecture of BM3 D for a 720 × 576 BT656 PAL format. The feature of the chip is with 100 MHz system frequency and a 166-MHz 32-bit double data rate(DDR). When noise is σ = 25, we successfully realize real-time denoising and achieve about 10 d B peak signal to noise ratio(PSNR) advance just by one iteration of the BM3 D algorithm.