基于HTN的卫星应用任为分解方法

文章在深入分析卫星应用任务复杂性的基础上,研究了层次任务网络(HTN)方法对复杂卫星应用任务分解问题的适用性,并给出了相应的问题求解框架;深入研究了卫星应用任务需求要素预处理工作的主要内容和步骤,并在此基础上构建了卫星应用任务的域模型;最后给出了复杂任务及其分解方法的定义,采用基于HTN的方法对复杂卫星应用任务分解问题进行求解,同时给出了基于HTN的状态空间前向搜索算法.     

MDS图在液态模锻工艺过程单片机仿真控制系统中的应用

本文介绍了液态模锻工艺过程单片机仿真控制系统的设计方法，包括液态模锻工艺程确立、逻辑量确立、硬件系统设计、ＭＤＳ图的建立及软件实现，在工艺设备的逻辑性控制中应用ＭＤＳ图控制结构设计的控制器可方便方便地实现ＰＬＣ的控制功能，也可主便地实现其他娄字逻辑系统的控制功能。     

Data fusion algorithm based on state and attribute parameter

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基于DS18B20的数字温度测量仪

介绍了DS18B20-线式数字温度传感器的功能特性和结构特点，分析了其工作时序，结合AT89S51给出了数字式温度测量装置的系统结构、硬件接口电路和软件设计方法。     

圆度误差的一种微机图像测量法

将圆度误差测量的影像法与最小二乘圆法相结合，利用多媒体图像处理技术，设计了一种圆度误差的微机自动测量系统，实现了非接触、远距离快速测量，提高了测量精确度，为某些特殊工件的测量提供了一套实用的测量方法。     

项目教学法在《电视机原理与维修》中的应用

通过项目教学法，对《电视机原理与维修》这门课程进行课程改革，在改革中强调课程的理实结合，重点培养学生的基本技能，使学生具备一定的电路原理图分析能力和电路故障分析与排除能力。     

Phase-Coded Interrupted CW Signals and Processors

High resolution radars require signals with large time-bandwidth product such as CW signal and coherent pulse train (CPT). We discuss a phase-coded interrupted CW (ICW) signal which is the combination of CW signal and CPT. Phase codes used here are with perfect periodic autocorrelation. The periodic ambiguity function of ICW signals is studied including single-carrier signal and multi-carrier signal. It is interesting that the gate function has different effects on two signals and contributes to a multi-carrier ICW signal which yields nearly perfect autocorrelation. Meanwhile we also suggest an efficient receiver approach to ICW signals, which can reduce the computational burden of the processor and utilize the good properties of P3 and P4 codes.     

高逼真度燃油重心控制仿真平台开发

针对现有燃油重心控制仿真手段存在的不足,提出了基于Flowmaster、CATIA与VB交联仿真的燃油重心控制仿真技术方案,重点论述了该技术方案中涉及的燃油质量特性数据库建立和燃油系统交联仿真,在此基础上搭建了燃油重心控制仿真平台。以某型飞机为例,进行了燃油重心控制仿真分析,验证了平台的可行性和有效性。     

Detection of satellite attitude sensor faults using the UKF

A novel fault detection (FD) method for nonlinear systems using the residuals generated by the unscented Kalman filter (UKF) is proposed. The errors of the UKF are derived and sufficient conditions for the convergence of the UKF are presented. As the local approach is a powerful statistical technique for detecting changes in the mean of a Gaussian process, it is used to devise a hypothesis test to detect faults from residuals obtained from the UKF. Further, it is demonstrated that the selection of a sample number is important in improving the performance of the local approach. To illustrate the implementation and performance of the proposed technique, it is applied to detect sensor faults in the measurement of satellite attitude.