SYNCHRONOUS ELIMINATION OF VIBRATION IN THE PLANE, PART 2: METHOD EFFICIENCY AND ITS STABILITY

This paper is a continuation of Part 1 in which the idea of a synchronous vibration eliminator was investigated. The vibrator movement friction causes phase shifts of vibrators. Appearance of the vibratorsʹ phase displacements causes that their effect on an object does not compensate fully the excitation and, therefore, residual vibrations remain. A parameter describing the efficiency of this method of vibration elimination was introduced. The influence of parameters of a system was investigated based on values of phase displacements. A detailed analysis was carried out for one or two vibrators and results are presented in a chart form. The efficiency of the method was tested. The stability of synchronous movement of the eliminators with excitation was verified. A criterion of this stability was given and conditions were set in which vibrator motions assuring vibration elimination may occur. The maximum difference between excitation frequency and initial velocity of vibrators was investigated for which synchronous interruptions may evolve. It was shown that synchronous vibrator motions and the elimination of object vibrations can occur only in supercritical ranges of excitation frequencies. On the contrary, in undercritical ranges vibrators increase object vibrations.