Design And Implementation Of Control Subsystem Of Plane's Barycenter Adjustment System Based On CRIO

With the continuous improvement of living standards,the domestic demand for self-developed large passenger planes has become increasingly urgent.As more and more relevant project were set up,the requirement of aircraft testing techniques keeps increasing.The new demand brings great opportunities for the development of flight test instruments.Weight and barycenter are the basic parameters of aircraft,they will affect plane's stability and manipulating characteristics.During the flight test,it is necessary to adjust the barycenter to verify the stability characteristics of the aircraft under different situations.A n automatic barycenter adjust system with high reliability and high precision is very necessary.The control system is the kernel part of system,which determines the performance of system.This paper focuses on the design of aircraft's barycenter regulating system,introduces the design and development of control subsystem,which is based on cRIO Benefit from the well-selected device and reasonable partition of software and hardware,the automation degree,reliability and adjustment precision of system is highly improved.This paper first analyzes the functional requirements and technical specifications of barycenter adjust system of C919 aircraft.According to the overall regulation demand,we have designed the overall hardware structure for automatic control system.Based on the given technical specifications,the relevant devices are carefully selected.The integration of hardware is completed.Utilizes the unique architecture of cRIO,the designed system has adopted the hardware-software co-design concept.According to the requirement analyzation,this paper introduces the basic principle of calculation of airplane's barycenter and other relevant theory.Then the design of control cabinet is detailed explained in this paper.In the part of software design,the embedded monitoring software and data acquisition and control logic are discussed respectively.Finally,according to the actual situation of the project schedule,the method of software testing is defined,and all the implementation of software functions are tested.At the same time,the regulation accuracy of the system is determined through calculation of error.Through software testing,the control system is proved to be able to meet all the technical specifications,realize all the expectations of design.