Multiple Degree of Freedom Model of Giant Magnetostrictive Actuator

  • Dongwei LI 1. College of Mechanism and Vehicle, Beijing Institute of Technology 2. Vehicles and Electrical Engineering Department, Ordnance Engineering College
  • Zhongbo HE Vehicles and Electrical Engineering Department, Ordnance Engineering College
  • Peilin ZHANG Vehicles and Electrical Engineering Department, Ordnance Engineering College
  • Zhaoshu YANG Vehicles and Electrical Engineering Department, Ordnance Engineering College
  • Ce RONG Vehicles and Electrical Engineering Department, Ordnance Engineering College
  • Yezun SUN 247 Military Representative Office, GAD Military representative Bureau
Keywords: giant magnetostrictive actuator, multiple degrees of freedom model, stable response, harmonic response, oil load

Abstract

A specific giant magnetostrictive actuator is developed for injectors in high-pressure-common-rail system. The magnetic strength, with its axial distribution unevenness considered, is determined by the driving current and axial dimension. Multiple degrees of freedom model of the specific GMA is established based on J-A model and vibration theory. The number of degrees of freedom is optimized, and step response is calculated and its state-space model is provided and computed using MATLAB. Steady-state response and frequency response in moderate driving level is achieved and verified by the test results, and load contributed by fluid is regarded as elastic-damping load and the specific response of GMA in this case could be forecast. From measured result, the proposed multiple degrees of freedom model are amenable to describe the stable response of the specific GMA under low frequency harmonic driving.

DOI: http://dx.doi.org/10.5755/j01.ms.23.3.16321

Published
2017-04-21
Section
ELECTRONIC AND OPTICAL MATERIALS