Design And Implementation Of A Certain Type Portable Aero-engine Control Automatic Test Instrument

As aero-engine controller is the control center of aero-engine, extremely strict norms are implemented for testing and detecting aero-engine controller in order to ensure that the control signal is in consistent with flight requirements when the engine is working. Therefore, the quality of test equipment exerts direct influence on controller’s property and even the study and development of engine. In order to guarantee that the aero-engine electronic controller keeps working normally, it is required that regular detection and maintenance should be carried out for electronic controller. In terms of test efficiency and measurement accuracy, traditional manual test is unable to meet the increasingly complicated test requirements.By analyzing the aero-engine controller test technology and aiming at the problems of current test equipment from the perspectives of automation and portability, this thesis brings forward a design proposal of automatic tester of portable engine controller. Besides, it proposes taking PC/104 bus module as hardware platform and Microsoft Visual C++ 6.0 as software development environment to design the automatic test and realize the functions of automatic test, manual test, fault diagnosis and wireless monitoring to engine controller, satisfy the test demands in complex climate and electromagnetic environment.The task in this thesis takes a certain type aero-engine control as the test object, according to the test requirement, chooses the suitable PC/104 model, designs the actuating mechanism of each simulating engine as well as the signal conditioning circuit of real sensor characteristics. Meanwhile, this thesis studies the software architecture based on the model of ABBET, and the XML which is used in the automatic test system as the description of test process and signal and the expression way of information interchange. This thesis designs the command parser based on the XML document description to realize the automatic test by explain and execute the craft document, completes the design of auto test system.The significance of this study is to construct an automatic test platform to liberate labor largely and realize the whole enclosed test process, designs the humanity manual test interface that simulates manual test board to totally control all hardware resources, meet the comprehensive test requirements. This tester had passed the performance and environment test and practical application strictly,the application result shows that this equipment is accurate, reliable, stable and general, improves the detection efficiency and the detection level of the aero-engine control, which is of bright application prospect.