| 摘要 |
Acceleration limit reset arrangement for a fuel control device of a gas turbine engine, said device (11) including a proportional speed loop (34, 36) slaved to a demanded speed signal (Nd) formed by integrating in an integral loop (26, 28, 32) an acceleration term (Nd-Ngs); a comparator (28) in the integral loop (26, 28, 32) compares the acceleration term (Nd-Ngs) to a limit (As) and, if the acceleration term (Nd-Ngs) is in excess of the limit (As), regulates the rate of change of the actual engine speed (Nh) to the limit (As); the limit (As) is scheduled by an acceleration/deceleration limiter circuit (30) as substantially equivalent to the surge line of the engine (10); the acceleration limit reset arrangement (38, 40, 42, 44) is responsive to the scheduled limit value (As) of the acceleration limit and to the scheduled and actual engine speed signals (Ngs, Nh) for modifying as a function of the difference between said scheduled and actual engine speed signals (Ngs, Nh) the scheduled limit (As) during transient conditions and for generating an acceleration limit (Al) for the fuel control device (11) as a modified scheduled value. |
