| 主权项 |
1. A method for controlling a vibratory/oscillatory mixer that comprises an actuator and a mechanical system containing a material to be mixed, the mechanical system being subjected to a plurality of oscillatory input force waveforms and vibrating in accordance with a plurality of associated oscillatory response waveforms, each of said oscillatory input force waveforms having an input force frequency and an input force amplitude and each of said associated oscillatory response waveforms having a response frequency and a response amplitude, the method comprising:
a step for accepting input from an operator of a desired operating condition for the mechanical system; a step for operating the actuator at a first oscillatory input force waveform having a first frequency and a first input force amplitude to produce a first associated oscillatory response waveform within a primary mode of resonance in the mechanical system; a step for measuring a first phase angle between said first oscillatory input force waveform and said first associated oscillatory response waveform and recording said first phase angle; a step for controlling the actuator at a second oscillatory input force waveform having a second frequency to produce a second associated oscillatory response waveform; a step for determining a second phase angle between said second oscillatory input force waveform and said second associated oscillatory response waveform and recording said second phase angle; a step for calculating an undamped natural frequency, a damping ratio and operating points for maximum displacement, maximum velocity, maximum acceleration or maximum jerk for said mechanical system; a step for driving the actuator at an operating frequency that causes the mechanical system to vibrate substantially at one of said operating points; a step for repeating said operating, measuring, controlling, determining, calculating, and driving steps until the mechanical system is operating at said one of said operating points; a step for adjusting said input force amplitude until said desired operating condition is reached; a step for periodically testing the mechanical system to ensure that it is operating at said desired operating condition, and, if the mechanical system is not operating at said desired operating condition, repeating said operating, measuring, controlling, determining, calculating, driving, repeating, adjusting, and periodically testing steps until the mechanical system is operating at said desired operating condition; a step for, during operation at said desired operating condition, calculating the amount of energy and/or power being absorbed by the material to be mixed; a step for, during operation of said mechanical system, executing a supervisory algorithm; and a step for terminating mixing. |
