Characteristics of a Linear Actuator for an Automated Manual Transmission (AMT)
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Date
2013-12
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The Ohio State University
Abstract
The scope of this research is to design a suitable experiment that will allow to accurately find the parameters of the actuators that control the transmission. The purpose is to find these parameters in order to develop the dynamic model to enable model based control (mbc). An automated manual transmission (AMT) is an innovative type of transmission that combines the advantages of both a manual transmission (MT) and an automatic transmission (AT). The end goal of this research is to use existing actuators that are made by SKF and understand their behavior under extreme operating conditions to ensure their success as part of the AMT. The project also involved designing test stands such that actuators could be tested under identical conditions for each iteration of extension and retraction of the actuating end. These tests are carried out to find the parameters as well as the internal efficiency of the actuator system. The idea is to study the behavior of the actuator over a large number of tests and see the variance in the parameters with respect to changing voltage and load inputs. The efficiency is calculated based on these parameters. Finding the system efficiency helps in calculating internal losses as there is no accurate method for modeling the interaction between the different parts. These findings will be used by The Ohio State University EcoCAR 2 team for designing the control algorithm for the AMT that will be used in the development of a prototype plug-in hybrid vehicle (PHEV) that is based on a 2013 Chevrolet Malibu. This thesis also deals with the black box model of the electro-mechanical clutch actuator. Further work on this project will include the possibility of replacing the existing actuators with quicker and more efficient ones.
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Keywords
AMT, automated manual transmission, linear actuator, PMDC