Design of a pyroshock test bench

Nowadays, more and more countries focus on the development of aerospace technology. Rocket launching as one of the most important parts in aerospace technology gradually goes into the core of research. During launch, electronic equipment installed on the rocket like satellites, microcontrollers… suffer high shock. When the rocket reaches the designated position, the parts on the rocket will be separated, and this process is often achieved by blowing off the connecting parts by small explosions that also generate high shock. In order to prevent the electronic equipment from failing after the rocket lifts off, it is essential to do a pyro-shock test for them before rocket launching. The thesis is devoted to design a pyro-shock test bench and its aim is to simulate the impulsive excitation generated during an actual launch. At present, there are many types of pyroshock test benches on the market, and in this thesis pendulum has been chosen to simulate the impulsive excitation. In order to prevent the specimen from being subjected to multiple shocks, this work proposes a method of mechanical braking to prevent secondary shocks. During the braking process, no sensors, motors, clutches are used, which greatly improves the reliability of the process. Moreover, the mechanical braking method does not require a lot of programming work, which greatly reduces the cost of the equipment. Also, the supporting structure of the necessary resonant plate has been designed and numerically investigated.