| 摘要 |
<p>The invention relates to a method and arrangement for automatically setting the gain in control loops. The object of the invention is to provide a method and arrangement for automatically setting the gain in control loops, which are characterized by a rapid yet reliable setting and/or tuning procedure. According to the invention, in one method step, amplitude values of controlled variable and control difference are formed from a signal for the controlled variable and the control difference, respectively, which signal has been subjected to band-pass filtering, squaring, low-pass filtering and square-root extraction, and a quotient of the amplitude values is determined which represents the existing gain and is used for calculating a gain change which is to be carried out using a gain setting means. A field of application for the invention is control loops, as used in CD or DVD players for example, in order to focus the scanning or recording light or laser beam on the optical recording medium, or to follow the information track. <IMAGE></p> |
