Augmenting flight control surface actuation system and method

A technology of flight control surfaces and actuators, which is applied in the field of flight control surface actuation systems, and can solve problems such as low efficiency and low PCU efficiency
CN1732108AActive Publication Date: 2006-02-08THE BOEING CO
0 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE BOEING CO
Publication Date
2006-02-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Apparatus (10) for providing actuation power to an aircraft flight control surface. The apparatus includes a first actuator (16) and a second actuator(18), where the second actuator has a bypass mode and an assist mode. The mode of the second actuator is determined by an internal differential pressure across the first actuator. The apparatus further includes a mode select valve (40) for selecting between the bypass mode and the assist mode for the second actuator, and a solenoid valve (48) that when energized causes the mode select valve (40) to select the other mode for the second actuator. When the second actuator is in the bypass mode, the first actuator provides the actuation power for the aircraft flight control surface. But, when the second actuator is in the assist mode, both the first and second actuators provide the actuation power for the aircraft flight control surface. Accordingly, the apparatus allows the flight control surface to be operated in a more efficient manner with less hydraulic flow being required.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to actuation systems of aircraft and more particularly of flight control surfaces. Background technique

[0002] The Power Controller (PCU) is used to apply loads to position and maintain aircraft flight control surfaces such as ailerons, elevators, rudders, spoilers, etc. in position. Traditional PCUs are usually sized based on stall load and required speed. The required speed generally refers to low load, or an unloaded condition, a low load condition, or a maximum allowable time to move from a surface faired to a specified surface position in a specified flight condition. For simplicity, the description below is based on the no-load speed requirements. Stall load refers to the maximum force that the PCU actuator can exert. Maximum idle speed refers to the fastest movable speed of the actuator's piston when the control valve is wide open and no load is acting on the actuator.

[0003] Designing the PCU according to t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More