Vibration attenuation in two-link flexible mechanical arms with periodic composite materials

Yan Zhang,Lin Han,Hong-Qiang Chu,Lin-Hua Jiang,Xue-Wei Kang,Qiao Zhu

doi:10.1177/1687814015573827

Abstract

We introduce the periodic composite materials, so-called phononic crystals, to the flexible mechanical arms systems. Due to the transfer matrix method and the Bloch theorem, the theoretical solution of band structure of the two-link model is deduced and then verified by the frequency response by the finite element method. The influence of the included angle of arms to vibration characteristics is analyzed. The frequency response of the two-link flexible arms with/without phononic crystals is investigated. The results illustrate that, by using the periodic composite materials, some frequency ranges with strong attenuation can be obtained. This study provides a new way to eliminate vibrations in flexible mechanical arms.

Highlights

The mechanical arms system is widely used in engineering
In the self-propelled howitzer (SPH), the flexible mechanical arms system is applied to the device which used to auto-load
Inspired by the concept of phononic crystals (PCs), we introduce the periodic composite materials to the flexible mechanical arms system, which would be a potential way to eliminate the vibration in mechanical arms system

Summary

Introduction

The mechanical arms system is widely used in engineering. Compared with the traditional heavy rigid mechanical arms system, the flexible mechanical arms system has evident advantages because of its wider application, faster response speed, higher payload-to-robot-weight ratio and efficiency, and safer operation due to reduced inertia.[1,2] the flexible mechanical arms system is compatibly and widely used in the fields of aerospace,[3,4,5,6] manufactory,[7] national defense,[8] and so on.the greatest disadvantage of the flexible mechanical arms systems is the vibration problem due to their long, slender, and light arms. Keywords Flexible mechanical arm, periodic composite materials, band structure, frequency response

Results

Conclusion