Automated helicopter maintenance monitoring
    1.
    发明授权
    Automated helicopter maintenance monitoring 失效
    自动直升机维护监控

    公开(公告)号:US5239468A

    公开(公告)日:1993-08-24

    申请号:US624373

    申请日:1990-12-07

    摘要: An automated helicopter maintenance monitoring system (20), which is comprised of a flight data recorder subsystem (22) and a maintenance computer subsystem (24), collects data from a plurality of sensors in order to facilitate helicopter maintenance. The system (20) processes vibration data, rotor track data, rotor phase data, and flight sensor data to determine when a helicopter fault has occurred or will occur. Additionally, the system (20) can prompt a pilot/maintainer to fly the helicopter through specific operational states in order to aid in the maintenance process.

    摘要翻译: 由飞行数据记录器子系统(22)和维护计算机子系统(24)组成的自动直升机维护监视系统(20)从多个传感器收集数据,以便于直升机维护。 系统(20)处理振动数据,转子轨道数据,转子相位数据和飞行传感器数据,以确定直升机故障何时发生或将发生。 此外,系统(20)可以提示驾驶员/维护者通过特定的操作状态飞行直升机,以帮助维护过程。

    Helicopter weight measurement
    2.
    发明授权
    Helicopter weight measurement 失效
    直升机重量测量

    公开(公告)号:US5229956A

    公开(公告)日:1993-07-20

    申请号:US665061

    申请日:1991-03-06

    CPC分类号: G01G19/07

    摘要: A weight measurement system calculates the gross vehicle weight of a helicopter while in hover or level unaccelerated forward flight by measuring and averaging the distances 20,22 between the fuselage 24 and the underside of each main rotor blade 26 at the front and rear of the fuselage 24, measuring the main rotor speed, and correcting for the effects of vertical and horizontal drag forces on the fuselage due to the spinning rotor and forward velocity, respectively, using predetermined vehicle calibration data. An inhibit signal 54 may also be provided to the weight calculation logic to disable the weight calculation when the vehicle is in a flight regime not suitable for accurate weight measurement.

    Regime recognition
    3.
    发明授权
    Regime recognition 失效
    制度认可

    公开(公告)号:US4933882A

    公开(公告)日:1990-06-12

    申请号:US267204

    申请日:1988-11-04

    CPC分类号: G01D1/14

    摘要: System operating regimes are identified by dividing a range of each one of a plurality of sensed system parameters into a plurality of predetermined range segments, assigning an alphanumeric character to each range segment of each parameter, and generating a composite number, each digit of which is made up of one of the alphanumeric range segment characters of each parameter. Apparatus compares the current sensed values of each parameter to the corresponding predetermined range segments to determine the current range segment of each sensed parameter, generates a current composite number made up of the current range segments of all of the parameters, and compares the current composite number to a plurality of predetermined system operating regimes to determine if the current composite number identifies one of a plurality of system operating regimes. The current composite number is converted to a base ten equivalent to facilitate the comparison of the current composite number to the plurality of system operating regimes.