| 摘要 |
<p>A fuel control system (11) for a gas turbine engine (10) of the acceleration based, closed loop kind, wherein the fuel flow (Wf) to the engine is controlled as a function of the difference between an actual speed signal (Nh) and a demanded speed signal (Nd) which itself is proportional to the time integral of a demanded acceleration signal (A1); According to this invention, there is provided at least one stress limiter apparatus which generates a further acceleration term (A2, A3) as a function of the difference between the actual value of an operating parameter (turbine inlet temperature Tt, low pressure spool speed NI, etc.) of the engine related to a stress limit and a predetermined limit value for this parameter, and the demanded speed signal is generated from the lowest of said acceleration signals (A1, A2, A3); For use in fuel systems for gas turbine engines.</p> |
