A Robust Active Vibration Control of Automotive Engine

Abstract

In this study, the effectiveness of an active engine mount in vibration suppression of a four-cylinder V-shaped engine is evaluated. In this regard, a 6 degree of freedom engine model under inertia and balancing mass forces and torques is considered. At first, the governing equations of motion of engine supported by three rubber mounts are presented. Subsequently, one of the rubber mounts is replaced by an active mount and the effectiveness of active mount, in the presence of sensor noise, in vibration isolation of the engine is investigated. Two robust control algorithms, namely H2 and H∞ schemes are employed to provide control input using feedback from accelerations of the engine body in the position of the mounts. Moreover, unstructured uncertainties due to the unmodeled dynamic of the plant, actuator and sensors are considered. Simulation results show that the active mount is more effective than the rubber mount in vibration suppression of the engine.

A Review on Model and Control of Electromagnetic Active Engine Mounts

“…It is difficult to control MIMO systems with the PID controller based on the transfer function. e linear quadratic regulator (LQR) can overcome the aforementioned drawbacks of PID [126,128,146]. e weights of Q and R are adjusted, and the value of the gain K is calculated.…”

“…To isolate the engine vibration and prevent actuator saturation in the case of perturbations, Fakhari et al [110,126,130] applied the H 2 and H ∞ controllers shown in Figure 19. e weighting functions W n , [W d ] 6×6 , W F , and W u are the sensor noise, disturbances, transmitted force, and…”

Los Sistemas de Suspensión Activa y Semiactiva: Una Revisión

“…Las partes en movimiento de una estructura mecánica (máquina) producen vibraciones que pueden ser reducidas mediante sistemas de control activo-semiactivo, por lo que los motores son uno de los principales campos de aplicación (Olsson, 2006). La activación y desactivación de cilindros para disminuir el consumo de combustible genera vibraciones y ruidos, que se controlan mediante bases activas del motor y usando diferentes técnicas de control (Shin, 2008) (Fakhari et al, 2010). De igual forma, el control activo-semiactivo es aplicado exitosamente en el control de las vibraciones del pantógrafo de un tren de alta velocidad (Poetsch et al, 1997) (Allotta et al, 2008), un microscopio de barrido tipo túnel (Kuo-Jung et al, 2004), una estructura bio-mecánica (Xie et al, 2006) (Kazerooni et al, 2007) (Yu et al, 2009), una maquina lavadora (Chrzan and Carlson, 2001) (Spelta et al, 2009).…”