Flight Verification System Resisitive Sensor Analog Signal Hardware Design

At present, our country’s aviation industry has developed rapidly, but the testing and analysis technology corresponding with is relatively backward. It is difficult to do the full verification test and evaluation to airborne equipment before installed for missing complete validation testing platform in aviation equipment development process. Aircraft carrier pilot test system is an important equipment to obtain experimental data in flight test, It urgent need of an effective comprehensive test verification environment which is called ground verification platform to ensure stable, reliable and accurate. The contents of this thesis is our domestic large commercial aircraft carrier pilot test system ground verification platform- some types of analog design of analog source system.First, this thesis discusses the background and significance of the subject, describes the current situation and development trend of domestic and international research on aviation equipment ground test technology and the development trend of aviation test sensor. Then the related knowledge of aircraft carrier pilot test system, including the composition and role of airborne test system and ground verification platform, was introduced. Then an overview of principles the analog signal source system is composed of, design ideas and so on.This thesis focuses on the resistance type sensor analog hardware design methods and implementation of analog signal source system, including RTD, potentiometers and strain type sensor. Through compared several programmable resistor simulation methods to determine the main design idea of the subject adopts. According to the overall structure and requirements of the analog signal source system design the overall structure of the hardware board; were analyzed in detail the working principle and input and output characteristics of RTD, potentiometer, resistance strain sensor; According to the working principle of RTD, potentiometer, resistance strain sensor and input and output characteristics and requirements of the subject designed three sensors’ signal analog circuits; Complete the development of local bus definition and communication protocols with PCI communications boards; complete the configuration of the channel and the design of synchronous between channel; According to the each type of card works and the software structure of the source system design the various types card’ API functions, finally, the board analyzed experimentally.Behavior and performance of the external characteristics of analog sources in the subject are fully consistent with the certain types of analog sensor, including the impedance characteristics of output, excitation source load characteristics. The analog resistance output values of analog signal source can be set by computer program, its resolution and accuracy to meet the requirements of technical specifications, and the accuracy can be ensured by calibration.