Methodology for Predicting the Optimum Design of Radio-Electronic Devices

Abstract

Mechanical influences such as vibration, shock, linear overload, and acoustic noise significantly reduce any electrical equipment’s service lifestyle. These mechanical influences usually occur during the operation of motors, gearboxes, rotating unbalanced masses. The resonant frequencies and other mechanical characteristics depend on the mounting option of the printed circuit boards (PCBs).Poorly fixed printed circuit boards will bend, and eventually, after the occurrence of first microcracks and then cracks, it will crack or break. The attachment points are subject to severe mechanical loads in case of sudden impacts and temperature fluctuations that the printed circuit board constantly experiences. As a rule, breaks are observed in the attachment points. Previous studies did not consider the relationship between mechanical stress and methods of installing PCBs. Through our research, we improved the model of the PCB by adding fixing points inside the plate, finding the optimal design and the mathematical equation for calculating the natural frequency. It turns out that the least preferred option is to mount the board with points that have coordinates, with the ratio’s a/4 and b/4, where a and b represent the length and width of the printed circuit board. Also recommended that to avoid placing electronic components near edges and attachment points, as they are more susceptible to fatigue. After determining the optimal design and selecting the first model through simulation using PTC Creo Parametric 7.0 validation and comparative results are obtained, and this approach can significantly improve the efficiency of the PCB design process.