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Design and installation of vibration testing system for spring mounted model of wing

This paper presents the design and installation of measuring vibration system in wind tunnel area 1m x 1m. The theoretical analysis of the spring structure in this model help we possible to design a system for wind tunnel by yourself with suitable area, wind speed as well as survey wing model to obtain results desire. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 18, SOÁ K7- 2015 Design and installation of vibration testing system for spring mounted model of wing Tran Tien Anh Hoang Ngoc Linh Nam Ho Chi Minh city University of Technology, VNU-HCM (Manuscript Received on July 08th, 2015, Manuscript Revised September 23rd, 2015) ABSTRACT: This paper presents the design and installation of measuring vibration system in wind tunnel area 1m x 1m. The theoretical analysis of the spring structure in this model help we possible to design a system for wind tunnel by yourself with suitable area, wind speed as well as survey wing model to obtain results desire. will be presented in more detail in the text. At the same time, the article also shows how to make a simple and durable wing model with NACA 0015 airfoil - wing model will be surveyed ranged in system above. This system helps us to observe the oscillation of wing survey by eyes, but to know exactly how wing fluctuates, also the pitching angle of wing, we use ultrasonic sensors to measure the distance variation, Finally we process the data after measured to see the similarities between the experiment and the theoretical dynamics of aviation. The aerodynamic phenomena affect to the vibration of the wing are also mentioned and overcome in the design of the wing. Key words: wind tunnel, measurement computing, ultrasonic sensor, ultrasonic transducer, measuring instruments. 1. INTRODUCTION 1.1. Aerodynamic Elastic Phenomena Aerodynamic elastic phenomena are phenomena involving simultaneous of three forces: aerodynamic forces, elastic force and inertia force. General characteristic of these phenomena is oscillation. There are some characteristic phenomena of aerodynamic elastic phenomena: - Flutter phenomenon is phenomenon of vibration, bending wings. The nature of this phenomenon is the harmonic oscillations of a self-stimulate certain structural components while at the same time the participation of the three forces (elastic forces, .