用单片机控制的安全报警器的设计

文中简要地介绍了一个具有分散采集信号，集中报警的安全报警器的设计，作者利用单片机的优点和功能，成功地设计了复盖地域大，既简单又灵活的报警器。     

WXJB—E型多点温度监测报警仪的研制

本文介绍了 WXJB—E 型多点温度监测报警仪的设计思想、基本原理、技术关键、技术指标及其功能。     

Elegant antidisturbance fault‐tolerant control for stochastic systems with multiple heterogeneous disturbances

In this article, the elegant antidisturbance fault‐tolerant control (EADFTC) problem is studied for a class of stochastic systems in the simultaneous presence of multiple heterogeneous disturbances and time‐varying faults. The multiple heterogeneous disturbances include white noise, norm bounded uncertain disturbances and uncertain modeled disturbances with multiple nonlinearities and unknown amplitudes, frequencies, and phases. The time‐varying fault signals are caused by lose efficacy of actuator. To online estimate uncertain modeled disturbances and time‐varying faults, a novel composite observer structure consisting of the adaptive nonlinear disturbance observer and the fault diagnosis observer is constructed. The novel EADFTC strategy is proposed by integrating composite observer structure with adaptive disturbance observer‐based control theory and H_∞ technology. It is proved that all the signals of closed‐loop system are asymptotically bounded in mean square under the circumstances of multiple heterogeneous disturbances and time‐varying faults occur simultaneously. Finally, the effectiveness and availability of proposed strategy are demonstrated by means of the numerical simulation and a doubly fed induction generators system simulation, respectively.     

电站锅炉主汽压力系统抗干扰设计和应用

针对炉跟机方式下的主汽压力控制问题,说明了克服系统中存在的２种不同的扰动途径：对由于煤种变化等引起的内扰,从控制结构和采用表征信号上分析了克服这种扰动的方案;对负荷变化引起的扰动,以抗干扰原则设计了前馈通道,并给出了结构形式和参数设计原则。实例说明,在设计中可舍弃一些烦琐且并非必要的测量信号,使方案简洁、明确并具有很强的克服扰动的能力。     

镀液pH值微机检测系统的研究

本文介绍了以ＭＣＳ－５１系列单片微机为核心的镀液ｐＨ值检测系统的基本原理，并对系统的硬件构成、软件设计和抗干扰措施等有关问题进行了详细介绍。     

微型计算机系统抗干扰技术

介绍了微型计算机系统中硬件抗干扰和软件抗干扰2类抗干扰技术的基本概念;针对不同的干扰因素,详细介绍了微型计算机硬件抗干扰技术的分类与应用,并从单片机应用角度讲述了软件抗干扰技术的应用。     

基于局部矢量匹配的颜色特征快速传递算法

为了提高颜色传递的速度与精确性,改善构成不相似图像之间的色彩传递效果,对传统的Welsh 颜色 传输算法进行了改进．首先颜色空间由RGB 空间转移到以视觉感知为基础的lab 空间下,再按照一定标准将源图 像局部的平均值和标准差组成特征矢量群．根据图像局部区域具有相似特征的特点,对源图像与目标图像局部矢量 特征进行抽样匹配计算．实验结果表明,该算法具有计算精确、传递速度快,受图像构成相似与否干扰小的优点．     

补偿式气敏元件的研究

提出了由n型气敏材料和p型气敏材料构成的补偿式气敏元件的原理及实现补偿的条件.据此原理制作了由γ-Fe_2O_3和LaFeO_3构成的补偿式元件.该元件有效地克服了乙醇的干扰,提高了对丁烷的选择性.     

基于差频解调技术的感应同频器数显表的研究

通过分析传统鉴相型数显表的工作原理,揭示了检测分辨率与抗干扰能力之间的矛盾,并提出了采用差频解调和高频激磁等技术解决矛矛盾的方法。     

Composite antidisturbance control for nonlinear systems via nonlinear disturbance observer and dissipative control

This paper investigates the design problem of composite antidisturbance control for a class of nonlinear systems with multiple disturbances. First, a novel nonlinear disturbance observer‐based control scheme is constructed to estimate and compensate the disturbance modeled by the nonlinear exosystem. Then, by combining the dissipative control theory, a linear matrix inequality‐based design method of composite antidisturbance control is developed such that the augmented system is exponentially stable in the absence of unmodeled disturbances, and is dissipative in the presence of unmodeled disturbances. In this case, the original closed‐loop system is exponentially stable in the presence of modeled disturbances. Subsequently, two special cases of composite antidisturbance control are derived with H_∞ performance and passivity, respectively. Finally, the proposed method is applied to control A4D aircraft to show its effectiveness.