Research on vibration suppression of the Forklift Steering System based on finite element modal analysis and pole placement

This paper addresses on the problem of vibration suppression of the Forklift Steering System by active means, which is also proved by the field test Based solely upon the measured vibration data and the Pro/Engineer and Pro/Mechanic finite element modal analysis, there is no need to evaluate or know the system parameters such as mass, damping and stiffness terms. One only need to know the one-to-one correspondence between eigenvalues and a few specific structure parts. Structure modification is equivalent to system eigenvalues changing. Using the parametric design and partial pole placement method, a few undesired eigenvalues of matrix are reassigned suitably in condition of keeping the other eigenvalues unchanged. Then we can assign the resonance peak to a prescribed value. As a result, the vibration amplitude is effectively suppressed and the dynamic characteristics are obviously improved.