Abstract
The performances for controlling a rotating machine by using either an Electromagnetic Actuator or a Piezoelectric Actuator are compared in this work. The aim is to establish selection criteria based on environmental impact. Life Cycle Analysis shows that the operating stage has a considerable impact. In this study, only the operating stage is considered. The energy consumed by the actuators seems to be the appropriate indicator for the same "mechanical" performances. Numerical studies are carried out in order to quantify the energy consumed in each case. Modal control strategy with a fuzzy controller is used. The controller inputs are displacements and velocities. The system studied is modeled by using finite element method and the electrical circuit of each actuator is modeled by using basic electricity and electromagnetism theories. Several configurations are assessed and defined by using the chosen Functional Unit.The results obtained show that both controllers are efficient and enable recommendations for optimal control procedures design for the energy consumed.
Highlights
Life Cycle Assessment (LCA) is an important evaluation and decision-aid tool
An initial Life Cycle Analysis approach has shown that the operating stage is that which has the greatest impact, this paper focuses only on this stage
In this study the objective is to control the dynamic behavior of this rotor by using an active hybrid bearing where the command forces for the control are delivered by ElectroMagnetic Actuators (EMA)
Summary
Life Cycle Assessment (LCA) is an important evaluation and decision-aid tool. It is used to analyze environmental problems associated with products and services throughout their full life-cycle. In the field of turbomachinery, Active Magnetic Bearings (AMB) have been successfully applied in industrial applications [14] They are well suited for contactless operations such as actuators and sensors in rotating machinery [15,16,17,18]. AMB technology in conjunction with conventional bearings is utilized either as an active magnetic damper [19], or for controlling the instability of certain supports such as journal bearings [20,21] In this case the AMB is considered to be an EMA. In this study the objective is to control the dynamic behavior of this rotor by using an active hybrid bearing where the command forces for the control are delivered by EMA. The results are presented and the main conclusions are summarized in the last section
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