Self-Synchronization Of Two Coupled Exciters In A Vibrating System Of Plane Motion

Since the last century, extensive research has been devoted to the theory of mechanic-electric coupling in self-synchronization vibrating system and obtained many important theoretical results. These results has been imply in many different areas in human lives, production and practice. However, the theory of synchronous vibration mention less characteristics of the motor, and coupling the rotor inertia is also small, they can only care the case that motor rotor inertia and the drag coefficient in similar circumstances. In the actual production process, even if the number of motors with the same model, its parameters are inevitable differences. Therefore, use of electromechanical coupling theory, the synchronization system has further studied the dynamic vibration characteristics, developed self-synchronous vibration theory, these mechanical system have a basic on the design. This research has important theoretical significance and practical value in engineering.According to the theory of self-synchronization, we propose a new device which called plane vibration transport aircraft structure that has many characteristics such as it can vibrate along simple direction. When the sieve materials have accumulated, the exciting force of y direction can toss them, avoid the blocked phenomenon, remove the manual clearance, and improve screening efficiency. It is much better than the other plane vibrating transport machine and a furthermore stability of self-synchronization for vibration system is increased.The theories studies a two-motor drive system of self-synchronous vibration theory, mainly discuss the following areas.(1) Establish the equations of a flat two-mass system vibration with two Coupled Exciters according to Lagrange equation.(2) The theories of self-synchronization of two Coupled Exciters in a Vibrating Machine of Plant Motion are studied by using mechanical-electric coupling theory. At first, in the synchronous frame of stator voltage, the electromagnetic torque of an induction motor in the quasi-steady-state operation is derived. Secondly, averaging the equations of motion of the two eccentric rotors over the period of possible synchronous operation, the equations of frequency capture is derived. The concept of torque of frequency capture is proposed, the conditions of the frequency capture are obtained, and the nonlinear equations of calculating the capture rotating velocity and the phase difference between the two eccentric lamps are derived. At last, the condition of stability is obtained using the Routh-Hurwitz criterion, and the condition of realizing vibratory synchronous transmission is obtained.(3) Based on the theoretical analysis, the characteristic of torque of frequency capture in the self-synchronization vibration system is obtained, i.e., one half of the products of the torque of frequency capture and sin(2a) between the two eccentric lamps acts on the motor of the phase leading as the load torque to limit the increasing of its rotating velocity, and another acts on the other motor as the driving torque to limit the reduction of its rotating velocity. During the steady-state operation of the vibrating system, the torque of frequency capture does not do work.(4) Analysis of the coupled dynamic characteristics of the two exciters are obtained, including load coupling, general dynamic symmetry, general dynamic symmetry and the impact factor of Stability of synchronization.(5) The computer simulations are carried out to verify the results of the theoretical analysis afore-mentioned.