Research On Intelligent Coin-Tap Test System Of Aircraft Composite Structures

With the development of aviation technology and material science, more and more new-style, advanced materials are widely used in civil aircraft. Damage mechanism, failure form and repair technique of composite material is distinct from metal material structure because of the character such as anisotropy and so on. So the composite material detection, maintenance and airworthiness certification will definitely confront with development and challenge, and how to build a safe, dependable and economical control system has become an urgency problem today. Among these, NDI of composite materials is especially important.Now, most NDT method (electromagnetism testing, eddy current inspecting, ultrasonic testing and so on) of composite own their merits and range of application. Following the advanced technology in the world, combined with acoustic impact technique, intelligent coin-tap test System of aircraft composite structure is studied based on the theory and experimental investigation. Intelligent coin-tap test soft is also launched according to manufacture and airworthiness certification of composite. This paper including: researches of the sensor of coin-tap inspecting and some key technology of its application; studying of coin-tap signal transact circuit such as amplifier module, AD conversion module, operation module and regulator n. module; damage types of composite materials and related NDI method is studied also; at last, the soft system with the database of damage and airworthiness certification, is developed in this paper.On the other hand, the system is experimentally verified by the coin-tap examination and analysis on the damaged composite samples. The result shows the feasibility, validity, and advancement of the system, and some useful conclusions are also given in this paper.With the character of high automatic facility, prompt and accuracy, the intelligent coin-tap test System of aircraft composite structure studied in this paper, can be employed in production and maintenance field of civil aircraft composite structure.