In general FEA and BEM analysis is used effectively to predict the NVH performance of a power-train or a
vehicle. But for developing an active noise control strategy 1-D simulation with active noise control is often
preferred to provide more focus on building control strategy. Also in some cases inputs from 1-D models are used
for FEA analysis to obtain different types of loading conditions from different operating parameters. In [9] detailed
literature review on active systems were conducted. In this paper different NVH control examples implemented in
automotive applications were presented, including control of engine vibrations, structure borne noise transmitted
from the road into the passenger compartment and low-frequency chassis vibrations. The control strategy studied for
different applications like feed forward and feedback control, single- and multi channel control systems and the
utilization of different actuator concepts like active mounts, inertial mass actuators and active tuned absorbers, as
well as different control sensors like accelerometers and microphones were also discussed.
Use of MBD model for NVH analysis
MBD (Multi Body Dynamics) models are the choice of the day. As the FEA analysis can’t model the large
deflection at bushings, hinges and joints, MBD analysis has been preferred for studying these dynamics. Different
analysis approach using MBD has been followed first one is rigid body analysis approach where each link or
component is assumed to be rigid only, the effect of large rotations and displacements are captured by this analysis.
Another approach is: use of flexible bodies, in this analysis along with large displacements and rotations the effect
of link or component flexibilities are also captured [2]. Work on ride quality improvement by modification of
suspension system parameters was used for optimization of vehicle ride quality [10]. A Virtual MBD model of an
off road car was developed. They have validated the results by different experimental tests. Also a sensitivity
analysis was performed based on design of experiments (DOE) method. The steps used in a typical MBD analysis
have been shown in Figure 4