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In this paper a new approach to model a double clutch system is presented with the aim of obtaining a model suitable for real-time simulations. The proposed model is obtained with a proper coordinate transformation of the system equations: the transformed system is described by two new state variables that correspond to the weighted relative speeds of the clutch plates. In this way one unique model...
The goal of this paper is the analysis of the dynamic behavior of a multi-phase asynchronous motor. The Power-Oriented Graphs technique has been used for modeling the system and a very simple and compact model has been obtained. The steady-state equations of the system have been studied finding remarkable relations between the motor voltage and current vectors. The eigenvalues of the electrical part...
The aim of this paper is to show how mechanical systems with time-varying inertia can be modeled by using the Power-Oriented Graphs technique. The reduced time-varying system is obtained starting from an extended Power-Oriented Graph model with masses and elasticities and applying a rectangular congruent transformation which eliminates the elasticities. The presented method is compared with the well...
The Nyquist plot is a fundamental tool in the investigation of the stability of control systems. Usually Nyquist polar diagrams are plotted in a linear scale and often, in particular when poles at the origin are present, the diagrams need different levels of magnification in order to inspect the behavior of the frequency response in the areas very close to or very far from the origin of the complex...
The Full Toroidal Variator is the core element in many mechanical hybrid systems for vehicle applications like Kinetic Energy Recovery System and Infinitely Variable Transmission because it allows to manage the power transfer with continuous variation of the speed-ratio. In this paper the model of a Full Toroidal Variator is addressed using Power-Oriented Graphs (POG) that is an energy-based modeling...
The aim of this work is to build a lumped parameter model of a closed loop drying system with recuperation of the condensate to be used in analysis, simulation and control design. The proposed approach is based on an energy-based modeling technique which guarantees the conservation of energy within the system. The whole system involves thermodynamics, air-water interaction with evaporation and condensation...
The aim of this paper is to provide a dynamic model of the Toyota Hybrid System (THS) for simulation and control purposes in the case of fault of one of the electric machines. The two three-phase electric machines that are commonly used in THS are here replaced by two five-phase machines. The model of the whole system is realized by using the Power-Oriented Graphs modeling technique and includes the...
This paper deals with the modeling of multi-phase permanent magnet synchronous motors under open-phase fault condition. Multi-phase electrical motors offer high reliability thanks to their capability to operate safely even in case of faults such the loss of some phase. In this paper the model of a multi phase PM machine in the case of open phase fault condition is proposed. The model is suitable for...
Three main modeling techniques have been proposed in the past years: Bond Graphs (BG), Power-Oriented Graphs (POG) and Energetic Macroscopic Representation (EMR). These modeling techniques are energy-based graphical techniques which exploits the power interaction between subsystems as basic concept for modeling. In this paper a comparison between the POG and EMR techniques is presented. These techniques...
The aim of this work is to model a new electromechanical system for applications in the field of automated corking machines. The paper presents the dynamic modeling of a new automatic corking machine for threaded plastic caps. The model is obtained using the energy-based modeling technique named “Power-OrientedGraphs” (POG). The considered corking machine is an electromechanical system with two degrees...
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