Aircraft avionics ground test system based on PXI bus and Lab Windows Cvi

Abstract

Disclosed is an aircraft avionics ground test system based on a PXI bus and Lab Windows Cvi. The system is composed of a hardware part and a software part, wherein their relationship is that the hardware part and the software part cooperate to achieve the functions of data acquiring, test result displaying, judging and recording. The hardware part is composed of a PXI test system, an adapter, an I / O module, an equipment cabinet, a test bench, a test cable and a power supply. The contents and procedures of the software part are as follows: firstly, a development environment is established and a test system application software engineering is established in the development environment; then, a test system software is designed according to time-driven task, event-driven task and background-run task; and finally, the design is initialized, service procedures are interrupted by a clock, and procedures are handled by an interface, wherein the whole operation process shows design in such aspects as software task division, task priority setting, task scheduling, communication between tasks, and display interface. The aircraft avionics ground test system provided by the invention has the advantages of modularization, integration and miniaturization in design.

Description

1. Technical field [0001] The invention relates to a ground detection system for aircraft avionics equipment based on PXI bus and Lab Windows Cvi, belongs to the technical field of aerospace detection, and specifically relates to hardware design and integration, software task division, task scheduling, priority allocation, and communication between tasks and interface design. 2. Background technology [0002] The aircraft avionics system includes a variety of equipment: onboard computer, inertial navigation, vertical gyroscope, heading sensor, altitude airspeed indicator, rudder servo, aileron servo and other electronic equipment. The types of signals involved include analog and digital , switching value, etc. In order to ensure the reliable operation of the aircraft, a lot of work needs to be done on the ground inspection of the aircraft, especially the inspection of the avionics equipment. Therefore, the design of the avionics equipment inspection system is an important t...

AI Technical Summary

Problems solved by technology

[0004] Most of the current ground testing equipment for aircraft avionics equipment is a combination of traditional instruments and some self-developed special equipment. The testing equipment is bulky and has a single function, which cannot meet the simultaneous testing requirements of all avionics equipment.

Simultaneous detection of a single number or waveform on the display interface cannot achieve rich display interface requirements such as numbers, graphics, and waveforms

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