Abstract
Linear piezoelectric gauges, eddy current transducers and other control and measuring devices have been widely applied for vibration diagnostics of objects in industry. Methods based on such gauges and used for measuring angular and linear vibrations do not provide the possibility to assess a rotation center or point angle of an object. Parasitic oscillations may occur during rotor rotation and in some cases the oscillations are caused by dis-balance. The known methods for measuring angular and linear vibrations make it possible to detect the phenomenon and they do not provide information for balancing of the given object. For this very reason the paper describes a method for obtaining instantaneous rotation center in the vibrating object. It allows to improve informational content of the measurements owing to obtaining additional data on position of object rotation center. The obtained data can be used for balancing of a control object. Essence of the given method is shown by an example of piezoelectric gauges of linear vibrations. Two three-axial gauges are fixed to the investigated object. Then gauge output signals are recalculated in angular vibrations of the object (for this purpose it is necessary to know a distance between gauges). Further projection positions of the object rotation center are determined on three orthogonal planes. Instantaneous rotation center is calculated according to the position of one of the gauges. The proposed method permits to obtain data on linear and angular vibrations and rotation center position of the vibrating object using one system of linear gauge. Possibilities of object diagnostics are expanded due to increase in number of determined parameters pertaining to object moving. The method also makes it possible to reduce material and time expenses for measurement of an angular vibration component.
Highlights
Eddy current transducers and other control and measuring devices have been widely applied for vibration diagnostics of objects in industry
Methods based on such gauges and used for measuring angular and linear vibrations do not provide the possibility to assess a rotation center or point angle of an object
The known methods for measuring angular and linear vibrations make it possible to detect the phenomenon and they do not provide information for balancing of the given object. For this very reason the paper describes a method for obtaining instantaneous rotation center in the vibrating object
Summary
А. Осадчий1) 1)Военная академия Республики Беларусь (Минск, Республика Беларусь). Способы измерения угловых и линейных колебаний, основанные на использовании таких датчиков, не дают возможности оценки центра вращения либо вершины угла поворота объекта. Известные способы измерения угловых и линейных колебаний позволяют обнаружить это явление, но не дают информации для выполнения балансировки данного объекта. Поэтому в статье описывается способ получения мгновенного центра вращения вибрирующего объекта. Это позволяет повысить информативность измерений за счет получения дополнительных данных о положении центра вращения объекта. Затем выходные сигналы датчиков пересчитывают в угловые колебания объекта (для этого необходимо знать расстояние между датчиками). Рассмотренный способ позволяет одной системой линейных датчиков получить информацию о линейных и угловых колебаниях, а также о положении центра вращения вибрирующего объекта. П. Способ определения центра вращения вибрирующего объекта / И.
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