Design And Realization Of Adaptive Piezoelectric Vibration Control System

In the field of industrial automatic control, vibrating feeder is an essential feeding device, it usually feed for medicine, electronics, food and others which have strict requirements on accuracy, noise, stability. During use, the aging of device, feed material changes and other factors will easily cause detuning which make the feed efficiency decreases, stability deteriorates, the controller drives efficiency is hardly to keep stable, domestic product is mainly dependent on imports for a long time. To solve that problem, thesis has designed an adaptive piezoelectric vibration control system which use adaptive algorithm to make vibrating feeder working in best condition.Firstly, this thesis introduces the present situation and development of domestic feeder, described the important role of feeder in industrial automation control; Secondly, analysis the principle of vibration feeder from the physical level, raised difficulties and innovation issues in the design process; Then, began to introduce the function and structural of vibration control system, and introduce separately from the hardware and software, human-computer interaction. In Hardware and software design, in order to eliminate the effects of voltage fluctuations on the system and ensure the stability of the vibration feeder, system uses flyback switching to produce a stable power supply for inverter and control panel; In order to adjust frequency and amplitude of feeder stepping, system uses SPWM for DC power inverter, and uses sine voltage to drive vibrating feeder working, so that power drive will has higher smoothness and less noise; In order to allow vibration plate always working in the resonant state and keep amplitude stable, system uses fuzzy PID in closed-loop control of the vibration feeder which adjusted by the feedback amplitude of the voltage and current. In human-computer interaction design, in order to monitoring status of each vibration feeder on time, remote setting controller’s driving amplitude and adjust vibration plate feeding speed, system uses 485 bus to connect PC terminal and multiple vibration feeder controllers, design simple control interface on the PC which display amplitude and frequency of vibrating feeder, facilitate adjust drive frequency and amplitude of each vibration feeder.Finally, paper has test on the adaptive control system of piezoelectric vibration feeder. The test results show that the vibration control system has achieved the design requirements and indicators set by the system. This system is stable and reliable, terminal control is convenient, provided reference to piezoelectric vibration feeder controller’s further development and improvement.