| 摘要 |
PURPOSE:To make it possible to dissolve at a final control element the unfavorable influences induced by troubles of a control arithmetic logical unit, as well as to improve control reliability, by extending consistently the doubling of the control arithmetic logical unit such as an analog controller of a gas turbine to the doubling of the final control element. CONSTITUTION:A doubled operation device in which subscripts A and B indicate sequences A and B is provided with deflection instruments 2 (the subscripts are hereinafter omitted) for determining deflections between control signals transferred from controllers 1 and output signals transferred through signal converters 4 from displacement detectors 3 for detecting displacements of a piston rod 9 of a servo-motor. The deflections obtained here are inputted to comparators 13 through absolute value generators 12 to be compared with output signals of a deflection setting equipment 11. The compared outputs obtained here are matched with theoretical signals transferred from FF elements 16 of the other sequence through inverters 17 in AND elements 14, and relay switches 18 are opened by that output signals through the FF elements 16 to control the actuation of a servo valve 7. |
