用VXI仪器组建通用雷达装备自动测试系统

武器装备的发展对测试系统提出了越来越高的要求。本文介绍了基于VXI总线卡式仪器和GPIB仪器组建的通用雷达装备自动测试系统的硬件结构，说明了测试软件的体系结构和设计方法。     

测试系统检查仪频率信号发生电路设计

根据某飞机机械检测车试车测试系统检查仪研制任务的需求,分析了航空发动机转速频率信号和振动频率信号,设计了模拟相应频率信号的发生电路,并实际应用于检查仪的研制。     

Latest Trends in Radar System Testing

Radar systems were initially limited to military applications, but today most people encounter radar applications everyday. Given the broad range of applications, a variety of radar types and technologies have emerged to meet unique needs. This paper discusses about the latest advances on system performance and testing of radar systems. When performing characterization of a radar receiver design, a variety of signals are required to accurately recreate the operational environment. This paper will review the test signal environment needed for evaluation of various modern radar systems. Performance considerations in terms of signal source fidelity and spectral purity will also be investigated.     

斯宾纳自动化与机器人系统

德国斯宾纳机床制造有限公司多年来一直致力于机床加工过程的自动化,除提供标准机床外,还可按照用户的要求提供覆盖不同产品、由不同机床组成、可实现不同加工过程的成套生产线、车铣加工交钥匙工程,以及配有自动上下料装置或机器人的柔性加工单元.     

Principles Involved in the LM Rendezvous Radar Redundant Gyro System

For typical failure rates the probability of two or more of four gyros failing is very much less than one or both of two. Thus, a single redundancy system of four gyros greatly enhances system reliability. The orientation of the sensitive axes of four gyros is specified and means of generating outputs dependent only on gyro inconsistencies are defined. The voting logic and plots of switching decision zones are developed. The hardware required to implement this logic is shown to be simple and thus reliable. The use of rate integrating gyros requires the limitation of error integration time in order to avoid spurious failure signals. This is achieved by a reset cycle which realigns the four gyros at regular intervals. False error signals can be generated if inputs are large enough to exceed linear ranges of various components downstream of the gyros.     

闪光雷达中APD探测性能分析

针对闪光雷达,给出了一种分析雪崩光电二极管(ADD)探测性能的方法.通过理论推导及仿真的方法,对APD接收到信号光功率、探测器的噪声、信噪比以及APD的探测性能进行了分析.结果表明.通过选择合理的APD增益,可提高的信噪比和探测概率,通过增大APD探测阈值,可以降低虚警概率.     

某型机载雷达综合测试系统硬件设计

针对某系列机载雷达系统地面试验的需要,组建了一套雷达综合测试系统。该系统基于GPIB总线、VXI总线和网络化结构,采用软硬件结合的模块化设计,可进行三种型号的机载雷达的自动测试和故障诊断。雷达测试系统联试实验验证了该系统的有效性和工程实用性。     

Principle and Design of a Vernier FM Radar System

This paper describes the principle and the signal design of a proposed new FM radar system. In order to measure the surface characteristics of a small target at a long distance, or to discriminate among multiple targets, very accurate range or Doppler resolutions are necessary [1]. The proposed system satisfies the range resolution requirement by detecting the target with two different resolutions: coarse resolution for measuring range, and fine resolution for measuring the target details. The principal advantage of the system is in the vernier scale for the measurement of a distance. The system is just as easily realizable as conventional FM radar, requires no special filters in the receiver, and represents a saving in the required bandwidth for the same range resolution.     

模糊控制在雷达天线控制系统中的应用

针对目前在雷达天线控制系统中采用数字PID控制存在超调量大、响应时间长等不足，分析比较了数字PID控制和模糊控制的不同特点，介绍了模糊控制在雷达天线控制系统中的应用。     

PLC在机械手自动控制系统中的应用

机械手的工作过程是由气缸驱动的 ,针对电磁阀的控制要求 ,提出了以可编程控制器 (PLC)为控制核心的机械手的自动控制系统、机械手的四种工作方式以及实现方法。     

On the Perfomance of Air Traffic Control Radar Beacon System

The sidelobe suppression and improved sidelobe suppression mode performance of terminal and enroute air traffic control radar beacon systems using the existing antenna and a typical improved antenna in the presence of perfectly dielectric flat ground are investigated theoretically. Necessary analytical expressions for various quantities characterizing the system performance have been derived. A general purpose computer program has been developed for the computation and tabulation of these quantities as functions of the elevation angle of the observation point and for different combinations of heights of the directional and omnidirectional antennas of the beacon. Although the discussions given here apply to some specific antenna configurations, the theoretical method developed has more general application in evaluating quantitatively the performance of the beacon system in a given situation.     

结构健康监测系统及其应用

航空、航天器结构在长期飞行过程中,由于疲劳、腐蚀、材料老化以及高空中的环境等不利因素的影响,不可避免地产生损伤积累,甚至发生结构损坏并因此导致航空、航天器坠毁等突发的严重事故,造成无法挽回的伤害。因此,对航空、航天器结构进行适时的健康监测不容忽视。     

飞机自动着陆鲁棒控制系统的设计与仿真

采用鲁棒H∞控制理论设计了某型飞机的自动着陆控制系统,描述了飞机自动着陆的过程,分析了系统中可能受到的干扰,建立了H∞控制问题的系统增广模型,针对飞机着陆时的要求设计了鲁棒H∞控制器以抑制干扰的影响.仿真结果表明,所设计的控制器对自动着陆时的干扰具有较强的抑制作用,能使飞机准确地跟踪期望轨迹并满足着陆指标的要求,具有良好的动态性能和鲁棒性能.     

新一代直升机状态与使用监控系统

针对我国目前直升机状态检测与故障诊断的现状,比较国外先进技术,提出我国的直升机状态与使用监控系统,并就系统的开放性与可扩展性进行深入的设计与讨论。     

Laboratory Evaluation Unit for the Automatic Calibration System

Automatic calibration denotes a system of computer-controlled self-calibrating electrical measurements. Its purpose is to minimize the calibration support required for electrical measurements in maintenance or check-out applications. The system utilizes techniques whereby all electrical measurements are automatically reduced to and expressed in terms of several basic standards. Measurement data are transmitted to a digital computer for computation of the value of the unknown parameter. Automatic self-calibration procedures are carried out just before unknown inputs are measured. Development of instrumentation known as the automatic calibration program, laboratory evaluation unit has been accomplished. This unit automatically measures and calibrates a wide range of the most common dc and low-frequency electrical parameters. Only three single valued, certified standards are included: a 1-V cell, a 1-? resistor, and a 1-MHz oscillator.     

Approximation of Corrected Slant Range in a Radar Surveillance System

Consideration is given to numerical procedures for evaluating the corrected slant range in a radar surveillance system. Applications include air traffic control operations in which such calculations must be performed repeatedly in real time for a multitude of targets without overtaxing available computational resources.     

PXI总线自动检测系统的设计与应用

阐述了PXI总线的基本概念和特点,并结合航姿系统测试设备的研制实例，介绍了基于PXI总线的自动检测系统的设计与应用。     

水闸泵站计算机自动控制系统设计

以上海松江区4个圩区水闸站、泵站为基础进行了计算机自动控制系统技术方案设计研究,并着重阐述了系统架构设计、监控系统设计、中心系统设计、系统性能要求四个方面,为上海乃至其它地区建立水闸泵站综合调水调度系统提供了技术支持.     

基于层次状态机的雷达显控技术研究

鉴于雷达显控系统的复杂度不断提升,各种状态相互交叉,相互影响,导致软件结构的设计也越来越复杂,不便于设计和后期的维护.本文采用了基于层次状态机的方法,将雷达显控系统的各种状态按照层次进行分类,针对不同的层次设计出其状态转换图,使编程更加简化,层次更加分明,同时可减少代码占用空间,提高系统的实时性能.