高可靠性红外线传感控制开关

采用编码技术进行红外线遥控开关控制，只能用于一般环境。在强干扰环境中发射的信号经过干扰后，接收电路难以准确辨认。采用红外光所载频率为38kHz的信号作为载波信号，890Hz左右的方波作为调制信号，经调制后作为发射信号。由接收头NJL61H380A对经过强干扰的38kHz的已调波进行接收和解调。其输出经低通滤波器滤波后，由模糊识别电路对其模糊识别，     

齿轮裂纹故障的循环矩诊断

介绍了循环平稳信号的二阶循环矩分析和处理方法、循环矩分析的抑噪特性。在给定齿轮裂纹调频信号数学模型的基础上，证明了其二阶循环平稳性。利用二阶循环矩一滞后平面图，分析了裂纹故障信号特征的循环矩提取方法，进行了仿真实验。针对齿轮裂纹故障实例，说明其对故障信号解调的有效性。     

ICP加速度传感器信号失真调整方法研究

通过加速度传感器采集到的信号因外界干扰常常会偏离其真实值，甚至出现严重的失真，给后续分析带来了误差甚至错误，因此振动信号的预处理在信号分析中非常重要。信号预处理是对采样信号提取特征量的首要步骤，它直接决定着后续诊断技术的使用效果及精度。对比了传统信号预处理方法和EM D去除冲击振动信号失真的有效性。结果表明，经过EM D处理后的信号质量有明显的改善，为后续的信号分析工作奠定基础。     

基于样本统计的信号占用带宽计算方法的改进

在无线电监测软件的开发中，对于台站信号的特征的计算是监测的重心所在，台站调制信号频谱的占用带宽是信号特征之一。本文在对信号样本进行统计研究的基础上，对传统的信号频谱占用带宽计算进行了改进，使其更具有良好的自适应性。     

齿轮泵的振动信号分析与特征提取

针对高压齿轮泵CB—KP63泵壳的振动信号，采用时域同步平均和频域分析方法对其振动信号进行分析，提取故障信号的特征，可有效地进行故障模式识别。     

水射流空化噪声的混沌辨识

水射流空化是一项很有潜力的高效节能的水处理技术，其关键技术在于空化喷嘴。通过水听器采集3种不同结构的喷嘴产生的空化噪声信号，以Takens定理为基础进行相空间重构并分别计算其最大Lyapunov指数，该方法为空化喷嘴的设计和检测提供了一种新的途径。试验发现这3组空化噪声信号的最大Lyapunov指数均大于零，即这3组信号都是混沌信号。喷嘴I（具有自激振荡腔结构）的最大Lyapunov指数值最大，说明其空化噪声信号相空间中的混沌运动最剧烈，同时该结构的喷嘴对初始条件的依赖性也最大。     

正交脉冲信号发生器的设计

正交脉冲信号发生器是将输入的单一相位的脉冲信号通过电路转换得到相位变化了的I／Q信号（正交信号，也称为”移相网络”）的电路装置。文章介绍了一种有别于上述概念的正交脉冲信号发生器，它根据正交脉冲信号的特性，通过D触发器及基本逻辑门组成的时序电路，配以数据选择器产生正交脉冲序列。其原理简单，具有一定的实用性。     

局域波法在滚动轴承故障诊断中的应用

简述局域波法的基本理论，通过对仿真信号和实测信号的分析，说明了局域波时频法在滚动轴承故障诊断中的可行性和有效性，并体现出其对非平稳信号时频分析的优点。     

压力信号调理模块设计及应用

在分析压力传感器信号特性的基础上，模块化地设计了压力传感器信号的调理电路并对其进行了现场试验研究。结果表明：电路能实时、准确地处理信号，且工作稳定，可靠，重复性好，抗干扰能力强，可广泛应用于工业压力传感器信号检测现场及类似的其他场合。     

数字式开关电容带通滤波器设计原理

利用电容既能线性跟随单踪信号，又能抑制周期性混叠信号的双重能力，本文提出了分时传递信号的带通滤波原理及与原理相关的带通滤波器。调控电路分时传递的切换频率，将主频信号在一周期内由n条支路在其固定的1／n时段分时有效地传递，其合成即为滤波器传递的主频信号。对于其他频率成份的谐波信号，电路合成的传递函数趋于零，带通幅频曲线近于理想的窄方波，文中主要研究了n=4的滤波情形。本文为模拟信号的滤波提供了一种新的数字式处理方法与理论。     

五次插值样条在NC过程链中的应用研究

对几种五次样条插值算法的性质及其在 NC铣削轨迹处理、CNC技术及逆向工程中的可使用性进行了研究 ,并讨论了曲线参数化方法、边界条件以及插值节点选择对所生成五次样条曲线的影响     

The development of an automated PIV image processing software—SmartPIV

Since the popularity of digital particle image velocimetry technique (DPIV), many PIV image processing algorithms have been proposed. Amongst them, fast Fourier transform (FFT) Cross Correlation, Discrete Window Offset Cross Correlation, Iterative Multigrid Cross Correlation, Iterative Image Deformation Cross Correlation and cross correlation based particle tracking methods are widely used algorithms and have been extensively studied by researchers. All of these algorithms have their advantages and disadvantages in terms of computational load and measurement accuracy. To choose a suitable algorithm, researchers not only need to understand the complex principles of these algorithms, but also need to find out their applicable flow conditions. This could greatly increase work load for PIV users who focus more on flow structure itself instead of PIV algorithms. It is therefore necessary to develop a method which can choose PIV algorithms wisely according to the input PIV images. This paper firstly reviews the development of PIV algorithm with mainly focus on analysing advantages and disadvantages of six widely used algorithms. By using both synthetic and real PIV images, comparative studies are then carried out among these algorithms. The tests give a rate for the performance of the algorithms and provide a parameter to automatically separate pattern match and particle tracking algorithms. Based on qualitative and quantitative analysis, an automated PIV image processing method—SmartPIV is proposed and tested by both synthetic and real PIV images. For all the three test cases, the SmartPIV successfully picks the most suitable algorithm and gives very promising results.     

遗传模拟退火混合算法在钣金自动排样中的研究

在钣金制造中,如何进行钣金件的排样,使得钣金达到最大的使用效率是目前机械设计工程迫切需要解决的方法。将人工智能领域中的遗传算法和模拟退火算法相结合,在前人排放算法的基础上,提出改进,利用遗传算法产生排样序列,利用模拟退火算法抑制遗传算法的早熟现象,进行排样处理,取得了理想的结果,实例测试表明,算法性能稳定。能为钣金排样系统的开发提供实用的、较优的排料算法。     

基于遗传算法的发动机气门弹簧的优化设计

本文就发动机气门弹簧,具体阐述了遗传算法在发动机零部件优化设计中的应用。通过实例计算表明,该算法具有较好的应用前景。     

高速数字存储示波器的数字滤波器设计与实现

介绍一种基于1GSPS高速数存示波器的数字滤波器的设计与实现方法。应用MATLAB信号处理工具箱，通过对数字滤波器算法的描述、分析、实验仿真及性能比较，最终获得满足要求的数字滤波程序。文中给出了应用MATLAB编译器自动编译成C 源代码文件的方案。     

基于STL文件格式的线框模型算法的研究与实现

介绍了基于 STL文件格式的线框模型算法 ,该算法是通过寻找 STL文件每个平面的轮廓环设计的 ,同时给出了一个该算法在基于 STL文件格式的快速模具设计系统中的应用例子     

Dispatching in semiconductor fabs with machine-dedication features

This research develops dispatching algorithms for a fab with machine-dedication characteristics. Machine-dedication, a new feature in a modern fab, has not been addressed in previous studies of dispatching. Three performance indices, including hit rate, mean cycle time, and throughput are of concern in dispatching. This research develops an algorithm, called LB-SA, based on a proposed simplification model of the process route. The line balance (LB) component aims to smooth the flow rate of the process route; and the starvation avoidance (SA) component aims to ensure that the bottleneck machine is not “starving” and has enough work-in-progress (WIP) to process all the time. Thirty dispatching algorithms, including the LB-SA algorithm, are compared by simulation. The LB-SA algorithm outperforms the other 29 algorithms both in terms of hit rate and mean cycle time, and is only slightly less than the best benchmark in throughput. Of the 29 other algorithms, one algorithm, called CR-SA, also performs very well. These two algorithms are both recommended for fabs with machine-dedication feature.     

有限代遗传算法及其在电弧炉自适应控制中的应用

针对一般遗传算法寻优速度不确定,难以可靠应用于自适应控制的特点,提出有限代遗传算法,并应用于自适应控制器参考优化上。仿真以电弧炉控制为例,用辅助最小二乘法辩识模型的参数,以不对称优化法初步确定控制器参数,然后以有限代遗传算法调控制器参考,结果显示,可达到优良的控制品质。     

Dispatching in semiconductor fabs with machine-dedication features

This research develops dispatching algorithms for a fab with machine-dedication characteristics. Machine-dedication, a new feature in a modern fab, has not been addressed in previous studies of dispatching. Three performance indices, including hit rate, mean cycle time, and throughput are of concern in dispatching. This research develops an algorithm, called LB-SA, based on a proposed simplification model of the process route. The line balance (LB) component aims to smooth the flow rate of the process route; and the starvation avoidance (SA) component aims to ensure that the bottleneck machine is not “starving” and has enough work-in-progress (WIP) to process all the time. Thirty dispatching algorithms, including the LB-SA algorithm, are compared by simulation. The LB-SA algorithm outperforms the other 29 algorithms both in terms of hit rate and mean cycle time, and is only slightly less than the best benchmark in throughput. Of the 29 other algorithms, one algorithm, called CR-SA, also performs very well. These two algorithms are both recommended for fabs with machine-dedication feature.     

基于时域分析的拉坯阻力曲线异常特征提取及在漏钢预报上的应用

介绍了板坯连铸结晶器拉坯阻力异常特征提取及在连铸漏钢预报中应用的研究。在对漏钢事故前拉坯阻力时域异常特征分析总结的基础上，针对两种异常特征模式——尖脉冲和斜坡设计了两种特征提取算法——幅值变化判断法和改进的过零率判断法，实际应用证明了算法的有效性。