The purpose of this paper is to enhance a passive suspension system with an electro-mechanical device in order to improve performance in terms of comfort, handling, and safety. The main goal is to develop a variable geometry suspension system of simple construction, small in size, which requires reduced energy for its implementation, and that is installable without substantial changes to the original passive suspension system through retrofitting operations. The device will be applied to a vehicle whose geometry is inspired by an open-wheel racing vehicle provided with a push-rod suspension. By means of a kinematic analysis, we evaluated geometry and kinematic properties of the suspension system, followed by CAD modeling and subsequent dynamic analysis. The kinematics of the system is analyzed by using the Lotus Suspension Analysis (LSA) software, while the multibody mechanical model is realized in the SimMechanics MATLAB Environment. Numerical simulations show the effectiveness of the proposed method
Aerial Vehicles (UAV), are increasingly being adapted and used in civil contexts, with particular specialization in the monitoring of the territory for environmental purposes, civil protection or possibly control and inspection of inaccessible areas or dangerous sites. This concerns, in particular, the adaptation of mini-UAVs, small devices that, due to their manageability and costs, can be allocated for public services.For this reason, it was decided to develop a multibody model of a quadrotor copter in the presence of wind fields by using SimScape Multibody Environment. The quadrotor is modelled as a non-linear underactuated and strongly coupled system. For the dynamic analysis, aerodynamic effect of drag, the thrust due to the propellers and external wind fields are considered. The evaluation of the needed thrust for prescribed trajectories gives indications about the type of propellers and actuator characteristics to be installed on the UAV.
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