The Design Of Electronic Equipment, Hard Vibration Modal Testing And Analysis

Miniaturization has become the trend in the development of electronic equipment, so that vibration resistance of electronic equipment can not meet the existing requirements. Because the small and lightweight application of mechanical and electrical systems, and the increasingly harsh environmental conditions. Vibration and shock's effect of the electrical and mechanical systems have become very prominent. Therefore the design of the mechanical and electrical systems must attach importance to the dynamic characteristics of the structure analysis. If we can not accurately grasp the properties of electronic equipment, it is impossible to establish a complete set of anti-vibration design methods of electronic equipment, and also having less initiative. It is necessary to improve the dynamic performance of the equipment and guarantee programs. During the install process of electronic equipment, we must master the dynamic performance of electronic equipment. So that we can be targeted to the structural design and electronic equipment install. Therefore, the modal analysis of equipment, which using to understand their nature such as natural frequencies, is very necessary.Modal analysis is a method to study the effects of structural dynamic characteristics, applying the system identification in the field of vibration engineering. Dynamic design equipment and fault diagnosis are basis for the important theoretical. Dynamic changes to the structure research that system make some changes in the revised dynamics. It is also research that how to obtain some dynamic characteristics by the system changes and other issues.This paper will address these issues. It contains experimental modal testing and analysis of components and the whole system, and summed up a set method of electronic equipment modal testing and analysis. Based on the experimental data, realize the principles and methods of parameter estimation, and understand the modal parameter estimation from frequency domain. Determine the modal parameters of the measured object, and summed up the impact of structural parameters of modal parameters. It can provide numerical results to match the finite element model. This finite element model can provide effective guidance for the design or improve electronic equipment.Understand the vibration characteristics of testing equipment by responding spectrum analysis. The impact spectral analysis is to study the anti-vibration and the impact characteristics of components or critical parts. Random spectral analysis is the main purpose of the study the influence of modal parameters compared with the sin-swept signal extraction and the random signal. This paper presents some method of the shock and random response spectrum analysis.Founded on the experimental analysis, it can know the dynamic characteristics of components and the whole system. It focuses on how the dynamic characteristics of components affect the dynamic performance of a whole system. It also study that how to optimize the structure to gain the dynamic characteristics which are required.Based on systems and components performance from the modal analysis, develop effective ways to control parts and components vibration. It main include designing internal components damper to reduce vibration and dynamic designing. And the result of the experiment show that this design obtains better reduces vibration effective.