| 摘要 |
<p>The invention relates to systems for adjusting a parameter P with the aid of a manual control 10. According to the invention, the variation delta P in the parameter P is proportional to the variation delta x in the control per unit time delta t if - 2ROOT b </= delta x </= + 2ROOT b and is given by: delta P = c. delta x + a/b. delta <2>x.sign of delta x if delta <2>x > b. The comparison operations are carried out by the threshold circuit 14 whereas the multiplication operations are performed by the circuits 13, 15 and 16. The invention is applicable to systems for moving a reference frame with the aid of a "mouse". <IMAGE></p> |
