公开(公告)号：US09886039B2

公开(公告)日：2018-02-06

申请号：US14623382

申请日：2015-02-16

Applicant: Bell Helicopter Textron Inc.

Inventor： Luke D. Gillett ,  Joseph M. Schaeffer ,  Christopher M. Bothwell ,  Robert Worsham ,  Jillian Alfred ,  Sung Kim

IPC: G05D1/08 ,  G05D1/06 ,  B64C27/10 ,  B64C27/16 ,  B64C27/605

CPC classification number: G05D1/0607 ,  B64C27/10 ,  B64C27/16 ,  B64C27/605

Abstract: A flight control system having a control law, the control law operable to generate a modified pitch command, the modified pitch command representing a greater amount of collective pitch compared to an amount of collective pitch generated by a first pitch command, the modified pitch command being generated because a vertical descent speed of the rotorcraft at a given forward airspeed is greater than a threshold. A method of avoiding entry into an undesired vertical descent speed region during operation of a rotorcraft, including measuring a forward airspeed; evaluating a vertical descent of the rotorcraft; and generating a modified collective pitch command in respond to a first collective pitch command having a collective pitch value that would cause the rotorcraft to experience a vertical descent rate greater than a threshold value at the forward airspeed of the rotorcraft.

公开(公告)号：US20150232176A1

公开(公告)日：2015-08-20

申请号：US14623382

申请日：2015-02-16

Applicant: Bell Helicopter Textron Inc.

Inventor： Luke D. Gillett ,  Joseph M. Schaeffer ,  Christopher M. Bothwell ,  Robert Worsham ,  Jillian Alfred ,  Sung Kim

IPC: B64C27/605 ,  B64C27/16 ,  B64C27/10

CPC classification number: G05D1/0607 ,  B64C27/10 ,  B64C27/16 ,  B64C27/605

Abstract: A flight control system having a control law, the control law operable to generate a modified pitch command, the modified pitch command representing a greater amount of collective pitch compared to an amount of collective pitch generated by a first pitch command, the modified pitch command being generated because a vertical descent speed of the rotorcraft at a given forward airspeed is greater than a threshold. A method of avoiding entry into an undesired vertical descent speed region during operation of a rotorcraft, including measuring a forward airspeed; evaluating a vertical descent of the rotorcraft; and generating a modified collective pitch command in respond to a first collective pitch command having a collective pitch value that would cause the rotorcraft to experience a vertical descent rate greater than a threshold value at the forward airspeed of the rotorcraft.

Abstract translation: 一种具有控制规则的飞行控制系统，所述控制规则可操作以产生修正的俯仰指令，所述修正的俯仰指令表示与由第一俯仰指令产生的总音调量相比较大的总音调， 这是因为在给定的前进空速下旋翼飞机的垂直下降速度大于阈值。 一种在旋翼航空器操作期间避免进入不期望的垂直下降速度区域的方法，包括测量前进空速; 评估旋翼航空器的垂直下降; 以及响应于具有共同音调值的第一集体音调命令来产生修正的集体音调命令，所述集体音调值将导致旋翼航空器在所述旋翼航空器的前进空速下经历大于阈值的垂直下降速率。