| 摘要 |
<p>The system includes two identical fluid powered actuators (10A, 10B) operable by respective supply pressures (P1, P2) which are controlled by respective identical valve arrangements (20, 21). Operating positions of flow control elements of the valve arrangements (20, 21) are applied through respective couplings to a differential arrangement (35) which operates, if these positions differ by an unacceptable amount, to apply an error indication through respective couplings (35, 36) to prevent the supply pressures (P1, P2) from being applied to the respective actuators (10A, 10B). </p> |
