Abstract
In a large braking environment, the head of the pilot would collide with the head up display (HUD) because of the aircraft pilot's body leaning forward under inertia. And the preload of the HUD determines whether the head is injured during the collision. Therefore, it is necessary to design a test component for investigating the influence of the mounting preload on head injury during the collision. Consideration of pilot safety, in this paper, the motion characteristics of the pilot is analyzed, and a component of head injury criteria tester for head impact test is established. Given the short-time and high-speed characteristics of the head impact, the driving method adopted hydraulic ejection. This method effectively solves the problems of space limitation and non-reusability in traditional methods. The computational fluid dynamics model and kinematic model of human body are used in this study to simulate the acceleration process. The AMESIM simulation model is set up to study the influence of key parameters on the velocity, angle and acceleration of the system collision moment, to optimize the system parameters and to be verified through experimental studies. The ultimate objective is to achieve that the linear velocity is 11 m/s when the test component rotates at a specified angle. This research can be referred to in the design of a component HIC tester and the study on optimization of fluid flow dynamic characteristics.
Highlights
At present, the research method on head impact test mainly involves driving a Hybrid III50th dummy having an approximate human size and skin structure to collide with a test piece installed at a specified position
Its body weight and main size are equivalent to the 95th percentile adult size in our country, which is quite different from the 50th percentile adult size
EFFECT OF ACCUMULATOR PRESSURE AND VOLUME ON DYNAMIC BEHAVIOR OF HIC TESTER Combining with the principle and mathematical model of cartridge valve, the influence of accumulator pressure and volume on acceleration, velocity and angle of head test component is studied by AMESIM simulation
Summary
The research method on head impact test mainly involves driving a Hybrid III50th dummy having an approximate human size and skin structure to collide with a test piece installed at a specified position. The dummy is designed according to the size characteristics of the European and American human body. Human body, dummy usually has redundant parts that are not used It results in great waste [7]. The main research content of this paper is to analyze the pilot’s motion characteristics in the braking state, design the structure of the component HIC tester and establish kinematic model based on AMESIM [12]–[15]. N. Cheng et al.: Design, Analysis and Testing of a Component Head Injury Criterion Tester for Pilot drive mechanism. Cheng et al.: Design, Analysis and Testing of a Component Head Injury Criterion Tester for Pilot drive mechanism It provides a reference for the design of the ejection lever drive mechanism. The article gives the structural design method of the head test component, which makes the head crash test method more standardized and more scientific, and provides a high reference for the study of the controllability and reliability of the crash test
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