Research And Design Of TTE Bus Test System

As the "blood vessel" of the aerospace electronic system,the bus carries the task of data transmission.The amount of digital information that the new aerospace electronic system needs to transmit has increased dramatically.The traditional bus is difficult to meet the requirements.Time-triggered Ethernet(TTE)is a new real-time network.It can also be compatible with AFDX networks and common Ethernet networks to meet new aerospace electronics.The system requires real-time and compatibility.In view of the above problems,this paper designs a TTE bus test system,which can complete the basic communication performance test of the TTE bus.On the basis of detailed analysis of the system’s functional requirements and technical indicators,the overall design of the system is proposed and the software and hardware design and development work is completed.The hardware system follows the modular design principle.According to the requirements,it is divided into current source module,1553 B communication module,A/D acquisition module,digital input module,switch output module,five sub-modules and server.The sub-module is controlled by industrial computer and function board.The card and the TTE terminal system card are composed of data sampling or signal output tasks,and each sub-module has corresponding control software.The server is the control center of the system and is responsible for unified coordination control of the five sub-modules.The five sub-modules are independent of each other,establish a connection relationship with the server through the TTE bus,receive control commands or return test data.The server software is responsible for unified and coordinated control of each sub-module and completes system testing.Server software is divided into sub-module control and automated configuration.The sub-module control software follows the modular design principle,the control of each sub-module is independent of each other,the control software structure is similar and provides a unified control interface to facilitate system management.The automated configuration enables free configuration of the system test flow.When performing system testing,configure the execution order and working parameters of each sub-module according to the test task.After the configuration is completed,the sub-module is called according to the configuration parameters to complete the system test work,and the server software can summarize the test data of each sub-module and display it on the control interface.Or save it locally for easy viewing.At the same time,the test process supports local save,and the saved process file can be loaded when needed.Finally,the test platform is built to test the basic performance of the TTE bus and perform separate functional tests and overall functional tests on each sub-module.By analyzing and processing the test data and comparing it with the system requirements,the results show that the system indicators meet the requirements and achieve the expected goals.