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THE DEVELOPMENT OF APPROACHES TO CREATION OF SYSTEM OF ACTIVE VIBRATION CONTROL IN PROBLEMS OF THE DYNAMICS FOR GRANULAR MEDIA
Last modified: 2017-12-05
Abstract
In recent years vibration technologies are extended and implemented. It allows to change essentially properties of surfaces of details of difficult configurations at their processing in the vibrating granulated environment. The requirement to ensure the dynamic state of vibro-impact processes is a feature of such technological vibration complexes. In particular, such requirements are used in the processing of long and large dimensional parts.
The technology of construction of mathematical models of interaction of granulated working medium from a vibrating surface with the possibilities of creating conditions of continuous collisions of the elements of the granular medium with the surface of the details is developed. The specific relationship between the duration of the free flight of the granules of the medium and the period of oscillations of the surface are maintained. The technology of choice and evaluation of possible trajectories of motion of particles of granular medium is proposed. Implementation of technological processes is connected with the necessity of control of the parameters of vibrational field. The vibrational field is formed by working body of the vibration table and one is characterized by a certain distribution of vibration amplitude along the length of the working body vibration technology machine.
This kind of problems are typical for vibration with the inertial mode of excitation of oscillations, characterized in that the working process parameters can deviate from the regulations of the technological process. Sensors of the original design for regimes measuring with the capabilities of automatically adjustment are developed for the estimation of dynamic regimes and for controlling parameters of the working stand.
The main idea of the construction of the sensors is that physical model of the vibrating interactions of the elements of the working environment is recreated in the structure of sensor and one generates the appropriate signals. Spatial system of sensors is created to realize the goal of spatial processing of the workpiece. Each sensor of system is adjusted to the required level of dynamic state and the form of vibro-impact interactions, which in general provides the necessary dynamic process quality of spatial processing.
The technology of construction of mathematical models of interaction of granulated working medium from a vibrating surface with the possibilities of creating conditions of continuous collisions of the elements of the granular medium with the surface of the details is developed. The specific relationship between the duration of the free flight of the granules of the medium and the period of oscillations of the surface are maintained. The technology of choice and evaluation of possible trajectories of motion of particles of granular medium is proposed. Implementation of technological processes is connected with the necessity of control of the parameters of vibrational field. The vibrational field is formed by working body of the vibration table and one is characterized by a certain distribution of vibration amplitude along the length of the working body vibration technology machine.
This kind of problems are typical for vibration with the inertial mode of excitation of oscillations, characterized in that the working process parameters can deviate from the regulations of the technological process. Sensors of the original design for regimes measuring with the capabilities of automatically adjustment are developed for the estimation of dynamic regimes and for controlling parameters of the working stand.
The main idea of the construction of the sensors is that physical model of the vibrating interactions of the elements of the working environment is recreated in the structure of sensor and one generates the appropriate signals. Spatial system of sensors is created to realize the goal of spatial processing of the workpiece. Each sensor of system is adjusted to the required level of dynamic state and the form of vibro-impact interactions, which in general provides the necessary dynamic process quality of spatial processing.