As the adaptive feedforward control method used for active control of periodic vibration has many shortcomings, an adaptivefeedbackcontrol method was proposed based on on-line frequency estimation.
针对自适应前馈控制方法的缺点，提出一种周期性振动主动控制的自适应反馈控制方法。
2
Feedback is used in control, but it is just limited to adaptive process.
在其中使要用到反馈的，但反馈仅限在自适应过程本身采用。
3
Various forms of process control, including statistical process control, run by run and adaptivecontrol, and real-time feedback control, are covered.