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    • 3. 发明授权
    • Propeller speed and phase sensor
    • 螺旋桨速度和相位传感器
    • US5170365A
    • 1992-12-08
    • US675066
    • 1991-03-26
    • Paul D. CollopyGeorge W. Bennett
    • Paul D. CollopyGeorge W. Bennett
    • B64C11/50G01P3/489G01P3/56
    • G01P3/56B64C11/50G01P3/489
    • A speed and phase sensor counterrotates aircraft propellers. A toothed wheel is attached to each propeller, and the teeth trigger a sensor as they pass, producing a sequence of signals. From the sequence of signals, rotational speed of each propeller is computer based on time intervals between successive signals. The speed can be computed several times during one revolution, thus giving speed information which is highly up-to-date. Given that spacing between teeth may not be uniform, the signals produced may be nonuniform in time. Error coefficients are derived to correct for nonuniformities in the resulting signals, thus allowing accurate speed to be computed despite the spacing nonuniformities. Phase can be viewed as the relative rotational position of one propeller with respect to the other, but measured at a fixed time. Phase is computed from the signals.
    • 速度和相位传感器反击飞机螺旋桨。 齿轮连接到每个螺旋桨上,齿通过时触发传感器,产生一系列信号。 根据信号序列,每个螺旋桨的转速是基于连续信号之间的时间间隔的计算机。 速度可以在一圈内计算好几次,从而提供高度最新的速度信息。 假定齿之间的间距可能不均匀,所产生的信号可能在时间上是不均匀的。 导出误差系数以校正所得到的信号中的不均匀性,从而允许精确的速度被计算,尽管间隔不均匀性。 相位可以视为一个螺旋桨相对于另一个螺旋桨的相对旋转位置,但是在固定时间测量。 相位根据信号计算。
    • 4. 发明授权
    • Control means for a gas turbine engine
    • 燃气轮机的控制装置
    • US4338061A
    • 1982-07-06
    • US163122
    • 1980-06-26
    • Richard S. BeitlerFrederick J. SellersGeorge W. Bennett
    • Richard S. BeitlerFrederick J. SellersGeorge W. Bennett
    • F01D11/06F01D11/10F01D11/24F01D25/08
    • F01D11/24
    • Clearance control means is provided for a gas turbine engine. In one embodiment relating to compressor blade clearance, means is provided for developing a first signal representative of the actual compressor casing temperature, a second signal representative of compressor inlet gas temperature, and a third signal representative of compressor speed. Schedule means is provided for receiving the gas temperature and compressor speed signals and developing a schedule output signal. The schedule output signal is representative of a reference casing temperature at which a predetermined compressor blade stabilized clearance is provided. Means is provided for comparing the actual compressor casing temperature signal and the reference casing temperature signal and developing a clearance control signal representative of the difference therebetween. The clearance control signal is coupled to a control valve which controls a flow of air to the compressor casing to control the clearance between the compressor blades and the compressor casing. Means is provided for modification of the clearance control signal to accommodate transient characteristics. Other embodiments are disclosed.
    • 提供了一种用于燃气涡轮发动机的间隙控制装置。 在与压缩机叶片间隙相关的一个实施例中,提供了用于开发代表实际压缩机壳体温度的第一信号,代表压缩机入口气体温度的第二信号和表示压缩机速度的第三信号的装置。 提供装置用于接收气体温度和压缩机速度信号,并开发时间表输出信号。 时间表输出信号代表提供预定压缩机叶片稳定间隙的参考套管温度。 提供了用于比较实际的压缩机壳体温度信号和参考壳体温度信号的装置,并且开发表示它们之间差异的间隙控制信号。 间隙控制信号耦合到控制阀,该控制阀控制到压缩机壳体的空气流,以控制压缩机叶片与压缩机壳体之间的间隙。 提供了用于修改间隙控制信号以适应瞬态特性的装置。 公开了其他实施例。