An oleo-dynamic torque amplifier has been studied, this device is very often used also within agricultural applications. During the operative phase of the system it is possible that can rise up, however, secondary phenomenon’s, whose effects can limit the field of applicability of the considered system. Insofar the purpose of the present study is that to determine the limits of applicability of it in line with the practical demands. Departing from the equations of equilibrium, the range of changing of the error for the control of position has been determined, determining a procedure to determine an error minimum, in which the system is insensible. The study of the error changing during the transitory period has been performed, in the hypothesis of absence of the insensibility range, and its changing laws have been determined by mean the aid of the computational code MatLab. Subsequently the dynamic study of the considered system has been performed, by using the pressure regulation valve, and considering the function error. Some cases considering not equal at zero viscous damping, have numerically been computed, noticing that the duration of the transitory period decreases when the damping values increase. Besides results that, wanting to reduce at the minimum the duration of the transitory period ones, not could act on the inertia moment J, it should be acted on the viscous damping values F. In this way, it would go however, so doing, meeting to the drawback to increase the causes of energy dissipation for the system, with the necessity to use greater power engines. Instead, the purpose could be equally reached introducing in the control system a tachymeter stabilization, or rather an element able to furnish a resistant torque proportional at the first derived of the error in function of the time

Study of an Oleodynamic Torque Amplifier

FORMATO, ANDREA
2009

Abstract

An oleo-dynamic torque amplifier has been studied, this device is very often used also within agricultural applications. During the operative phase of the system it is possible that can rise up, however, secondary phenomenon’s, whose effects can limit the field of applicability of the considered system. Insofar the purpose of the present study is that to determine the limits of applicability of it in line with the practical demands. Departing from the equations of equilibrium, the range of changing of the error for the control of position has been determined, determining a procedure to determine an error minimum, in which the system is insensible. The study of the error changing during the transitory period has been performed, in the hypothesis of absence of the insensibility range, and its changing laws have been determined by mean the aid of the computational code MatLab. Subsequently the dynamic study of the considered system has been performed, by using the pressure regulation valve, and considering the function error. Some cases considering not equal at zero viscous damping, have numerically been computed, noticing that the duration of the transitory period decreases when the damping values increase. Besides results that, wanting to reduce at the minimum the duration of the transitory period ones, not could act on the inertia moment J, it should be acted on the viscous damping values F. In this way, it would go however, so doing, meeting to the drawback to increase the causes of energy dissipation for the system, with the necessity to use greater power engines. Instead, the purpose could be equally reached introducing in the control system a tachymeter stabilization, or rather an element able to furnish a resistant torque proportional at the first derived of the error in function of the time
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/365867
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