航空仪表综合测试台设计

【作者】 吴向阳；

【导师】 卢国纬； 周锦帆；

【作者基本信息】 电子科技大学 ， 检测与自动化， 2003， 硕士

【摘要】 自动测试设备 ATE（Auto-Test Equipment)在机载电子设备的检测与维护工程中应用日益广泛，对保证维修质量、提高维修效率有着重要意义。 本文研究一种新的航空仪表自动测试设备，能对六种分布于驾舱内的指示型航空电子仪表—空速马赫数指示器、电动气压高度表、无线电距离磁指示器、地平仪、姿态指示仪、水平位置指示仪进行检测，完成维修手册所规定的全部功能、性能方面的综合测试。这台设备目前已制作出样机并处于试用阶段，名称与型号定为：ATE8000航空仪表综合测试台。本文全面阐述了航空仪表综合测试台的设计初衷、构想与软硬件实现办法。文中首先介绍了ATE的概念及其一般性设计方法，然后就航空仪表的结构原理与信号要求，特别是其主要功能单元—随动系统的工作原理与接口信号形式进行了重点分析。按照测试信号流程划分了三类测试项目—随动系统性能检测、离散信号输入测试、离散量输出测试—拟定了相应的实现方案，在此基础上确定了构造这台ATE的所需的硬件单元。本课题自行设计制作了同步器信号发送/接收卡、离散量输出比较板、ADI和HIS适配器卡等专用功能电路板。其中同步器卡的开发是难点和重点，它采用特殊的数/模、模/数转换器件—轴角转换器，实现了角位-数字信号相互间的直接转换，解决了随动系统性能检测中三相同步器信号激励与同步器信号/分解器信号数字化检测问题，有效提高了系统的自动化程度和检测精度。在软件设计部分首先规划了所有测试信号在计算机主机与被测件之间的连接和传输路径、数字I/O卡对可编程继电器开关矩阵的输出控制逻辑，作为软件设计依据，随后介绍了软件的模块化设计思想。更多还原

【Abstract】 ATE plays a more and more important role in the test and repair of aircraft avionics, and can considerably improve servicing quality and efficiency.Our task is to develop a new type of ATE used to test six kinds of aircraft avionics instruments located in the cockpit. It should be able to fulfill the test of all functions and performances of each instruments according to it’s Component Maintenance Manual. This ATE has been achieved and proved useful. We named it as ‘ATE 8000 Avionics Instruments General Tester’.In this paper we described in detailed its design intention , method and realization of the hardware and software. Firstly, we introduce some conception and general design theory of ATE, then we analyze the construction and signal forms of these instruments, especially on its main functional block , servosystem’s working principle and signal form. According to different signal forms , we plan for the execution methods of three test items :servosystem performance, discrete signal input ,discrete signal output., and decide the necessary modules which this ATE is composed of .In this research project we designed some special modules such as synchro/resolver signal transmit & receive card、 discrete signal output comparison card 、ADI and HIS adapter cards ect. The synchro/resolver signal transmit & receive card is the most important and difficult part which used special A/D and D/A (axis angle converter ) to make conversion between the analog singnals related to angle and its digital counterpart ,thus solve the issue of stimulation and test of synchro/resolver signal ，improved the test precision and automatic degree.As to the software, we firstly scheduled all of the test signal path between the computer and the UUT , the output control logic between the digital I/O card and programmable relay key matrix ,and used all of this to be the base of software design , then we introduce the block flow of software.更多还原