A stable multimodel scheme control for the regulation of the transient behavior of a tunnel-diode trigger circuit

A multimodel scheme is designed for a triggering tunnel-diode circuit. The scheme improves the transient behavior during the transition time period after switching from a stable system equilibrium point to another one which is known as a triggering process. Each model is obtained by a linearization of the circuit near an equilibrium point. Moreover, each of these models can be described as a combination of two other transfer functions describing the linearized plant behavior near two different equilibrium points. The scheme chooses online the model with the best tracking performance in order to generate the control law. Different reference transfer functions are proposed with the aim of generating the desired transient in the triggering process. Some simulations show the usefulness of this scheme.     

Espaces métriques rationnellement présentés et complexité, le cas de l'espace des fonctions réelles uniformément continues sur un intervalle compact

We define the notion of rational presentation of a complete metric space, in order to study metric spaces from the algorithmic complexity point of view. In this setting, we study some representations of the space C[0,1] of uniformly continuous real functions over [0,1] with the usual norm: ||f||_∞ = Sup{|f(x)|; 0x1}. This allows us to have a comparison of global kind between complexity notions attached to these presentations. In particular, we get a generalization of Hoover's results concerning the Weierstrass approximation theorem in polynomial time. We get also a generalization of previous results on analytic functions which are computable in polynomial time.     

A Comparison of Free BDDs and Transformed BDDs

Ordered binary decision diagrams (OBDDs) introduced by Bryant (IEEE Trans. on Computers, Vol. 35, pp. 677–691, 1986) have found a lot of applications in verification and CAD. Their use is limited if the OBDD size of the considered functions is too large. Therefore, a variety of generalized BDD models has been presented, among them FBDDs (free BDDs) and TBDDs (transformed BDDs). Here the quite tight relations between these models are revealed and their advantages and disadvantages are discussed.     

一种智能光纤位移传感器

介绍一种用神经网络实现无级查表功能的光纤位移传感器。其非线性误差小于0．3％FS。具体介绍了硬件原理和使用神经网络的方法。     

一种嵌信式微机数据采集系统的实现

主要讨论一个嵌入式微处理机数据采集系统的软／硬件设计方案。     

基于联合时频分析的混合神经系统在信号分类与模式识别中的应用

介绍了一种基于STFT,WVD和Wavelet变换的混合神经系统在特征提取和信号分类中的应用.它运用时频信号处理技术与混合神经网络结构以及高级训练算法相结合的设计思想,辅之以主元分析和全局决策融合策略,对传统的模式识别技术进行了有效地改进.本文将所述基于WT,STFT和WVD的混合神经系统信号分类器(WSWHNS)的算法程序嵌入一汽车实时智能故障诊断软件包中做了现场实验,获得了非常满意的诊断效果.     

称重配料系统传感器电源及放大电路

分析了LQBH - 10 0 0型沥青拌和机微机控制系统传感器电源和放大电路在系统中的重要性 ,提出了通过合理设计传感器电源及信号放大电路达到提高系统精确度、可靠性的方法。     

光三角式传感器测距系统

主要介绍了光三角式距离传感器测距系统的结构组成和原理 ,分析了参数之间的转换关系 ,论述了以单片机为核心构成检测电路的原理和性能 ,以及单片机的软件功能。最后给出检测系统的主要技术指标。     

多CCD图象传感器在辐射成象系统中的应用

多CCD图象传感器辐射成象系统采用当前最先进的光电成象器件 ,高速、高分辨率图象采集卡和现代数字图象处理技术 ,可以直接得到弹道过程的四个时刻的四幅数字X射线图象。概述多CCD图象传感器辐射成象系统的组成和原理 ,详细论述多CCD图象传感器的应用技术。