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Vibration control of flexible structures has always been one of the most important issues and Among variant available control methods, active vibration control using piezoelectric sensors and actuators has become popular due to its high efficiency and flexibility for designing a control system. The main concern in designing a control system with piezoelectric patches is finding best position for patches...
The nonlinear vibrations and chaotic motion of a carbon nanotube subjected to axial loads and rested on a Winkler and Pasternak foundation are studied. It is assumed that the carbon nanotube is simply-supported at both ends. The governing equation of motion for the nanotube and foundation system using the Euler-Bernoulli beam theory is developed. The Galerkin method is considered for the solution...
Nonlinear forced vibration of a free-form nanotube conveying fluid is investigated. The geometric form of the nanotube in the proposed model is considered by employing a Non-Uniform Rational B-Spline (NURBS) representation. The solution of the equation and the frequency response of the system are analytically obtained considering the resonance condition by means of the multiple scales method. Effects...
Free vibration analysis of a double-walled carbon nanotube (DWCNT) is performed where the surrounding medium has been modeled employing a Winkler model. The nonlinear differential equation of motion is derived for both layers of the nanotube by using an analytical method. In order to solve the coupled nonlinear differential equations of the system, the variational iteration method is utilized. By...
The nonlinear vibration of a circular curved carbon nanotube using Euler-Bernoulli beam theory is investigated. The governing equation of motion of the system is developed and the Galerkin method is utilized to obtain the nonlinear ordinary differential equation of the curved carbon nanotube. A quarter-circular curvature is considered for the nanotube and it is assumed to have a single wall with simply-supported...
The hybridization of the articulated line-haul heavy duty truck with self-propelled trailer is investigated. In this innovative configuration, the tractor electric hybrid powertrain is arranged in series with the trailer electric motor that provides a share of total traction efforts of the vehicle. This configuration could provide a regenerative braking capability in the trailer and improves the vehicle...
A narrow electric vehicle has been designed and controlled by an active vehicle dynamics control system. The proposed vehicle is equipped with four in-wheel traction motors, as well as four independently controlled steering systems. Simulation results show that the vehicle handling and road stability performances, mainly its overturning threshold, when compared with those expected from the non-tilting...
Active yaw moment control is one the method in order to control the vehicle stability and improve its handling. In this method, a corrective yaw moment would be applied to the vehicle which can modify the dynamic behavior of the vehicle. This corrective yaw moment could be generated directly or indirectly and it would be a function of friction between tire and road. Therefore in low friction conditions,...
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