Hydraulic steering booster device for UAV steering gear

Abstract

The invention belongs to the hydraulic technology of an unmanned aerial vehicle, and relates to a hydraulic control assisting device for a steering engine of the unmanned aerial vehicle. The hydraulic control assisting device for the steering engine of the unmanned aerial vehicle, provided by the invention, uses a quantitative hydraulic pump controlled by a frequency conversion motor as a pressure source to brake, a driving shaft of the quantitative hydraulic pump does not need to be connected with an engine shaft, the connecting manner is simple, and the position where the device is mounted is unrestricted. The turning-on and the output flow of the quantitative hydraulic pump are controlled by controlling the output rotational speed of the frequency conversion motor, so that the energy consumption is low. Through the use of liquid controlled two-position tee reversing valves, flow sensors can be located in an oil return path of a system all the time, so that the detecting accuracy for the system is improved. The reversing valves which are low in cost and have low requirements for oil liquid accuracy are selected and used for the assisting device, so that the failure rate of the assisting device is low. By mounting a kind of flow sensors for the assisting device for detection of the speed and the displacement of the steering engine at the same time, the burden of a flight control system is reduced. Pressure sensors are mounted for detecting the pressure of the system, so that a control system can understand the real-time information of the control assisting device.

Description

technical field [0001] The invention belongs to the hydraulic technology of an unmanned aerial vehicle, and relates to a hydraulic control booster device for an unmanned aerial vehicle steering gear. Background technique [0002] In the existing UAV steering gear hydraulic control booster device, the electro-hydraulic control servo hydraulic system is generally used, and the flow and pressure of the system are controlled by controlling the opening of the electro-hydraulic servo valve (or proportional valve) to realize the steering gear steering booster. , the speed and displacement of the steering gear are detected by the speed sensor and the displacement sensor. The structure is heavy and complex, and many signals need to be detected. This approach has 3 disadvantages: [0003] (1) The installation position is limited: the hydraulic pump shaft must be connected to the engine shaft, there is no choice for the position of the hydraulic pump, and the connection process betwee...

AI Technical Summary

Problems solved by technology

[0005] (3) The electro-hydraulic servo valve (or proportional valve) has high requirements on oil precision, high system failure rate, and high cost

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