Dynamic Analysis of Satellites Used for Side-Airbag System

摘要

Satellites are mechanical components that make the interface between the outside environment and the Electronic Central Unit (ECU). The Electronic Central Unit receives signals from the satellites it interconnects with environment. The signals are given, after a collision, by capacitor-type accelerometers. The multiple caps of the condenser are connected to a seismic mass and elastic element, thus achieving a vibrating mechanical system with a single degree of freedom. The deceleration produced during the collision generates displacements of the movable armatures of the capacitor, proportional to the value of this decay. This analogy signal is modulated and transmitted to the ECU. For correct processing of the accelerator signal, the bearer's frequency must be not allowed. For these reasons, a dynamic analysis of the accelerometer support satellite is performed. Dynamic analysis involves a finite element mesh for the use of the Modal Analysis Method in order to determine the resonance frequencies. In this paper we will analyze the influence of the different geometric types of finite elements, which, combined with the effects given by the nature of the component materials and the disagreement of the satellite, will lead to the requirements imposed in the limitations of the low resonance frequency values.