| 摘要 |
PURPOSE:To attain an ideal gain characteristic by giving a high sensitivity of a sufficiently small hysteresis to a two-position relay element and separating the operating signal and the feedback compensating characteristic of this element into parts for rise and fall of a controlled variable. CONSTITUTION:The two-position relay element has a high-sensitivity characteristic where hysteresis can be ignored, and a controlled system is turned on and off by its output signal (y). The signal (y) is inputted to primary delay elements 11 and 12 of a feedback compensating circuit. An output signal f1 of the element 11 is selected as a feedback compensating signal (f) by a switch 13 in the time when the controlled variable is allowed to fall, and an output signal f2 of the element 12 is selected similarly in the time when the controlled variable is allowed to rise. The selected operating signal is compensated with the feedback compensating signal and is inputted as the operating signal to the two- position relay element, thereby separating characteristics for rise and fall from each other to optimize them independently of each other. |
