Vibration analysis of multi-DIM vibration absorber based on parallel mechanism

An originality multi-DIM vibration absorption device with single-layer is presented It uses the parallel mechanism as the main mechanism, associating elastic damping system with the primary component of mechanism. So energy absorption and power adaptive balance can be realized. The vibration analysis of multi-DIM vibration absorber system is done using Lagrange equation. Due to the mass matrix M and the stiffness matrix K of system are the function of the mechanism´s position, so it is a complex nonlinear system. It´s very difficult to solve exactly for the system. But the natural frequency and modal of system are obtained approximately for the micro-vibration system that the elastic potential energy is more than the gravity potential energy, because the mass matrix M and the stiffness matrix K of the equilibrium location are constant matrix. The calculated result is near to its simulation, so the method can reflect the system´s vibration characteristics under the equilibrium state.