Two-degree-of-freedom controller to reduce the vibration of vehicle engine-body system

A Computational Approach to Vibration Control of Vehicle Engine-Body Systems

“…The actuator and sensor used to this control framework are selected to be collocated, since this arrangement is ideal to ensure the stability of the closed loop system for a slightly damped structure [26]. In our study, only the bounce and pitch vibrations in the engine and body are considered [35]. The engine with mass e M and inertia moment e I is mounted in the body by the engine mounts e k and e c .…”

“…In recent years, the noise and vibration of cars have become increasingly important [20,23,29,30,35]. A major comfort aspect is the transmission of engine-induced vibrations through powertrain mounts into the chassis (see Figure 1).…”

“…However, the disturbance source is assumed to be unknown in feedback control, then different strategies of feedback control for vibration attenuation of unknown disturbance exist ranging from classical methods to a more advanced methods. Recently, the performance result obtained by H  feedback controller with the result obtained by feedforward controller using Fx-LMS algorithms for vehicle engine-body vibration system was compared in [30,35].…”

“…A variety of control techniques, such as Proportional-Integral-Derivative (PID) or Lead-Lag compensation, Linear Quadratic Gaussian (LQG), 2 H , H  ,  -synthesis and feedforward control have been used in active vibration systems [1,3,4,10,11,15,24,26,31,32,34,35]. The main characteristic of feedforward control is that information about the disturbance source is available and is usually realised with the Filtered-X Least-Mean-Squares (Fx-LMS) algorithms.…”

An inertia-type hybrid mount combining a rubber mount and a piezostack actuator for naval shipboard equipment

“…The hybrid mount requires better performance against both shock and vibration loading, since the mount is designed for installation on the shipboard equipment of naval ships. So far, several configurations of hybrid mounts utilizing piezostack actuators have been designed on the basis of three types: serial (Kamada et al, 1997;Ichchou et al, 2001), parallel (Huang et al, 2003;Yang et al, 2001), and inertial types (Burdisso and Heilmann, 1998;Benassi and Elliott, 2005). The piezostack actuator generally has such a high degree Corresponding author: Seok-Jun Moon e-mail: sjmoon@kimm.re.kr of stiffness that the parallel type is not suitable for the hybrid mount to be developed.…”