基于 ispLSI 器件的 DRAM 控制器的设计(二)

以ＤＲＡＭ控制器的设计为例,介绍了在系统可编程技术。基于美国Ｌａｔｉｃｅ半导体公司的ｉｓｐＬＳＩ器件,提出了ＤＲＡＭ控制器的设计方法,并利用ＩＳＰＳｙｎａｒｉｏＳｙｓ－ｔｅｍ软件对系统进行了仿真。     

UNSTEADY FLOW ANALYSIS IN A CROSS-FLOW FAN WITH A CASING

ＵＮＳＴＥＡＤＹＦＬＯＷＡＮＡＬＹＳＩＳＩＮＡＣＲＯＳＳ－ＦＬＯＷＦＡＮＷＩＴＨＡＣＡＳＩＮＧＵＮＳＴＥＡＤＹＦＬＯＷＡＮＡＬＹＳＩＳＩＮＡＣＲＯＳＳ－ＦＬＯＷＦＡＮＷＩＴＨＡＣＡＳＩＮＧＣｈｅｎＣｉｃｈａｎｇ（ＪｉａｎｇｓｕＵｎｉｖｅｒｓｉｔｙｏｆ...     

APPROACH TO DISPATCHING FMS TOOL SYSTEM

ＡＰＰＲＯＡＣＨＴＯＤＩＳＰＡＴＣＨＩＮＧＦＭＳＴＯＯＬＳＹＳＴＥＭＬｉａｎｇＸｉｃｈａｎｇ；ＹａｎｇＹｕｅ（ＣｈｏｎｇｑｉｎｇＵｎｉｖｅｒｓｉｔｙ）Ａｂｓｔｒａｃｔ：ＤｉｓｐａｔｃｈｉｎｇｏｐｔｉｍａｌｌｙＦＭＳｔｏｏｌｓｙｓｔｅｍｃａｎｕｔｉｌｉ...     

利用ispLSI实现单片机与计算机间的通信

本文利用Ｌａｔｔｉｃｅ的ｉｓｐＬＳＩ １０１６并实现了单片机与计算机之间的一种新型通信接口－中断查询接口,文章阐述了接口的工作原理,并给出了利用ＡＢＥＬ语言进行设计的具体方法。     

SIMULATION OF ROLL-FORMING PROCESSES OF WELDED PIPE

ＳＩＭＵＬＡＴＩＯＮＯＦＲＯＬＬ－ＦＯＲＭＩＮＧＰＲＯＣＥＳＳＥＳＯＦＷＥＬＤＥＤＰＩＰＥＭＵＬＡＴＩＯＮＯＦＲＯＬＬ－ＦＯＲＭＩＮＧＰＲＯＣＥＳＳＥＳＯＦＷＥＬＤＥＤＰＩＰＥＨｕａＪｉａｎｇ；（ＮａｎｃｈａｎｇＵｎｉｖｅｒｓｉｔｙ）ＭａｎａｂｕＫｉ...     

SOLIDIFICATION PROCESSING AND FRACTURE MORPHOLOGY OF SiCp/ZL108 COMPOSITE

ＳＯＬＩＤＩＦＩＣＡＴＩＯＮＰＲＯＣＥＳＳＩＮＧＡＮＤＦＲＡＣＴＵＲＥＭＯＲＰＨＯＬＯＧＹＯＦＳｉＣｐ／ＺＬ１０８ＣＯＭＰＯＳＩＴＥ①ＺｈａｏＹｕｔａｏＪｉａｎｇｓｕＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙＡｂｓｔｒａｃｔＴｈ...     

INTERNAL FLOW IN CROSS-FLOW FAN FOR AIR CONDITIONER

ＩＮＴＥＲＮＡＬＦＬＯＷＩＮＣＲＯＳＳ－ＦＬＯＷＦＡＮＦＯＲＡＩＲＣＯＮＤＩＴＩＯＮＥＲＩＮＴＥＲＮＡＬＦＬＯＷＩＮＣＲＯＳＳ－ＦＬＯＷＦＡＮＦＯＲＡＩＲＣＯＮＤＩＴＩＯＮＥＲＣｈｅｎＣｉｃｈａｎｇＪｉａｎｇｓｕＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅ...     

INVESTIGATION ON COMPRESSIBILITY AND BULK MODULUS OF FLUID

ＩＮＶＥＳＴＩＧＡＴＩＯＮＯＮＣＯＭＰＲＥＳＳＩＢＩＬＩＴＹＡＮＤＢＵＬＫＭＯＤＵＬＵＳＯＦＦＬＵＩＤＣａｏＢｉｎｇｇａｎｇＸｉ＇ａｎＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉｔｙＡｂｓｔｒａｃｔＴｈｅｐｒｏｂｌｅｍｓｉｎｔｈｅｔｒａｄｉｔｉｏｎａｌｄｅｆｉｎ...     

NEW MECHANISM OF LIMITED-SLIP DIFFERENTIAL

ＮＥＷＭＥＣＨＡＮＩＳＭＯＦＬＩＭＩＴＥＤ－ＳＬＩＰＤＩＦＦＥＲＥＮＴＩＡＬ￥ＺｈａｎｇＳｈｅｍｉｎ；ＬｕｏＨｏｎｇｔｉａｎ（Ｘｉ＇ａｎＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉｔｙ）Ａｂｓｔｒａｃｔ：Ａｃｃｏｒｄｉｎｇｔｏｐｒｏｐｅｒｔｙｒｅｑｕｉｒｅｍｅｎ...     

SIMULATION STUDY ON CAPACITOR DISCHARGE PERCUSION WELDING

ＳＩＭＵＬＡＴＩＯＮＳＴＵＤＹＯＮＣＡＰＡＣＩＴＯＲＤＩＳＣＨＡＲＧＥＰＥＲＣＵＳＩＯＮＷＥＬＤＩＮＧＳｈａｎＰｉｎｇＷａｎｇＸｕＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙＡｂｓｔｒａｃｔＢａｓｅｄｏｎｔｈｅｎｅｔｗｏｒｋｔｈｅｏｒｙ，ｔｈｅｄｉｓｃｈａｒｇ...     

基于KPCA-SVC的复杂过程故障诊断

本文提出了一种将核主元分析方法与支持向量机分类相结合进行故障诊断的方法,运用该方法对连续搅拌釜式反应器（CSTR）进行实时的故障诊断,实验结果表明KPCA-SVC故障诊断方法既充分利用了KPCA的特征提取能力和SVC的良好的分类能力,又避免了复杂的计算,有利于提高故障诊断模型的实时性。     

Advanced technique for non-destructive testing of friction stir welding of metals

In this paper a new non-destructive testing (NDT) system focusing on micro size superficial defects in metallic joints is presented. The innovative system is composed by a new type of eddy currents probe, electronic devices for signal generation, conditioning and conversion, automated mechanized scanning and analysis software. The key original aspect of this system is the new type of eddy currents probe. This new probe provides enhanced lift-off immunity and improved sensitivity for micro size imperfections. The probe concept was studied using a Finite Element Method (FEM) tool and experimental verified using a standard defect.     

IMF筛选停止条件的分析及新的停止条件

分析了目前经验模式分解(empircal mode decomposition,简称EMD)中本质模式函数(intrisic mode function,简称IMF)筛选停止条件,并提出了一种新的筛选停止条件.首先建立了一种EMD分解效果的检测方法,采用该方法分析了3种IMF筛选停止条件,从分解效果图可以看到3种停止条件对EMD分辨率的影响;然后提出了一种改进的IMF筛选停止条件;最后通过分解面的效果图和算例,表明新方法可以减少模式混叠现象,提高EMD分解效果.     

A novel scheme for current sensor faults diagnosis in the stator of a DFIG described by a T-S fuzzy model

Diagnosis of current sensor faults (CSF) for doubly fed induction generators (DFIGs) is of paramount importance for the reliable power generation of DFIG-based wind turbines (WT). In this paper, a new scheme is developed for current sensors faults diagnosis in the stator of a DFIG-based WT. The nonlinear model of the DFIG is first transformed into an equivalent Takagi-Sugeno (T-S) fuzzy model. Secondly, using this model, a novel fault detection and isolation (FDI) algorithm is proposed. This algorithm is based on a bank of Luenberger observers for residuals generation combined with a new proposed residual vector. Furthermore, a new binary decision logic is used for CSF isolation. Stability analysis of the observer bank is analyzed using a Lyapunov theorem, which allows deriving sufficient stability conditions by solving a system of Linear Matrix Inequalities (LMIs). A simulation study is carried out to assess the performance and the effectiveness of the new FDI scheme.     

Modeling of twist drills in terms of 3D angles

Traditional nomenclatures of specifying cutting tool geometries are two-dimensional (2D) in nature. The present work presents a paradigm to model the geometries of a variety of twist drills in terms of three-dimensional (3D) parameters. The work outlines the construction of a detailed computer-aided design (CAD) model for a fluted twist drill and establishes a new 3D definition for the geometry of drill in terms of biparametric surface patches. The flutes of the drill are modeled as helicoidal surfaces. For this, sectional geometry of tip-to-tip profile is developed and then swept. The geometric model of the shank is developed separately. The transitional surfaces are modeled as bicubic Bèzier surfaces. With this methodology, we propose a new 3D nomenclature for drill geometries in terms of 3D rotational angles. The relations necessary to map the proposed three-dimensional angles to two-dimensional conventional angles, known as forward mapping and their reverse relations (inverse mapping) are also developed. The new paradigm offers immense technological advantages in terms of numerous downstream applications.     

Fast 3D shape recovery of a rough mechanical component from real time passive autofocus system

By using a passive autofocus system through a charge-coupled device (CCD) camera, this paper presents a new Yuan-Ze University (YZU) algorithm to detect the position of the sharpest image from a rough surface of an industry component quickly and accurately. To prove the performance of the YZU algorithm, it is compared to some well-known methods like fast Fourier transform (FFT), amplitude, Laplacian, discreet cosine transform (DCT), and conventional edge operators. Moreover, a new dynamic search method that implements this algorithm to produce real time digital image systems with fast response, accuracy, and robustness is proposed. The experiment results show that this technique is applicable to practical 3D measurement. In the application, two specimens a gauge block and an integrated circuit (IC) leadframe are tested to demonstrate the validity of 3D reconstruction from this YZU algorithm.     

神经网络-遗传算法在振动控制系统中的应用

分析了欧拉-伯努利梁的振动特性,提出了将遗传算法及神经网络应用于欧拉-伯努利梁振动主动控制的新方法.该方法利用遗传算法在线计算控制力,利用神经网络模拟粱的动力特性,代替梁进行动力分析.系统充分发挥了遗传算法及神经网络各自的特点,是非常具有发展前途的新型的控制系统.     

A new discrete-time robust adaptive time-delay control for a class of uncertain nonlinear strict-feedback systems using sliding mode

This paper presents a new discrete-time adaptive second-order sliding mode control with time delay estimation (TDE) for a class of uncertain nonlinear time-varying strict-feedback systems. The existing researches on time delay control (TDC) are conventionally established based on a stability criterion that is subject to the infinitesimal time delay assumption. Recently, this criterion was rejected and a new criterion was proposed for the development of a controller for systems with fully known dynamics. In this study, this approach is extended to uncertain systems. Specifically, a new criterion is developed for the stability of the TDE-error within an adaptive robust controller design without the infinitesimal time delay assumption. With the proposed adaptive robust control, there is no need for determination of uncertainties upper-bounds. Simulation results illustrate the efficacy of the proposed controller.     

Classification of fault location and performance degradation of a roller bearing

Effective fault location classification and especially performance degradation assessment of a roller bearing have been the subject extensive research, which can reduce costs and the nonscheduled down time. In this paper, a new fault diagnosis method based on multiple features, kernel principal component analysis (KPCA) and particle swarm optimization-support vector machine (PSO-SVM) is put forward. First, traditional features of the vibration signals in time-domain and frequency-domain are calculated, and then two types of features referred to as singular values and AR model parameters based on ensemble empirical mode decomposition (EEMD) are introduced. After that, the original feature vectors are mapped into higher dimensional space and the kernel principal components are extracted as new feature vectors, which are used as inputs to PSO-SVM. The experimental results show that the new diagnosis approach proposed in this paper can identify not only the fault locations but also the performance degradation of the roller bearing.     

An intelligent CAD system for development of controllers of active magnetic bearings

The purpose of this study is to establish a CAD (Computer Aided Design) system for research and development (R&D) of a new product. In the R&D process of a new product, the design objects are frequently redesigned based on the experimental results obtained with prototypes. The CAD/CAE systems (which is based on computer simulation of physical phenomena) are effective in reducing the number of useless prototypes of a new product. These kinds of conventional CAD/CAE systems do not provide a function to reflect the experimental results to the redesign process, however. This paper proposes a methodology to establish the CAD system, which possesses the engineering model of a designed object in the model database, and refines the model on the basis of experimental results of prototype. The blackboard inference model has been applied to infer model refinement and redesign counterplan by using insufficient knowledge of R&D process of new products.