Semi-active shimmy damper of undercarriage and control method thereof

Abstract

The invention relates to a semi-active shimmy damper of an undercarriage and a control method thereof, and belongs to the field of shimmy dampers of aircraft undercarriages. The shimmy damper compriseThe invention relates to a semi-active shimmy damper of an undercarriage and a control method thereof, and belongs to the field of shimmy dampers of aircraft undercarriages. The shimmy damper comprisee high-speed switching valve through an adaptive fuzzy controller module in the controller; and synthesizing the information supplied by the sensor to provide a control signal of the high-speed switche high-speed switching valve through an adaptive fuzzy controller module in the controller; and synthesizing the information supplied by the sensor to provide a control signal of the high-speed switching valve. The controllable shimmy damper changing damping by means of oil temperature and oil compression factors is provided, particularly a semi-active shimmy damping device meeting different damphing valve. The controllable shimmy damper changing damping by means of oil temperature and oil compression factors is provided, particularly a semi-active shimmy damping device meeting different damping requirements during shimmy damping, sliding and ground operating of an aircraft is provided.ing requirements during shimmy damping, sliding and ground operating of an aircraft is provided.s a cylinder body, a piston, a piston rod, a controller, a sensor and a high-speed switching valve, wherein the cylinder body is connected with an outer cylinder of an undercarriage buffer; the pistons a cylinder body, a piston, a piston rod, a controller, a sensor and a high-speed switching valve, wherein the cylinder body is connected with an outer cylinder of an undercarriage buffer; the piston rod is connected with a torque arm of an undercarriage wheel; the piston divides the cylinder body into a left cavity and a right cavity; and the high-speed switching valve is driven by the controllerod is connected with a torque arm of an undercarriage wheel; the piston divides the cylinder body into a left cavity and a right cavity; and the high-speed switching valve is driven by the controller and connected with the left cavity and the right cavity of the cylinder body through pipelines. The control method thereof comprises: receiving the wheel information fed back by the sensor by the cor and connected with the left cavity and the right cavity of the cylinder body through pipelines. The control method thereof comprises: receiving the wheel information fed back by the sensor by the controller; judging which working station an undercarriage front wheel system is in; determining the initial value of a control signal of the high-speed switching valve; receiving the initial value of tntroller; judging which working station an undercarriage front wheel system is in; determining the initial value of a control signal of the high-speed switching valve; receiving the initial value of th

Description

Landing gear semi-active shimmy reducer and its control method technical field The semi-active shimmy reducer and its control method of the present invention belong to the field of landing gear shimmy reducers. Background technique When the aircraft is taking off or landing, the front wheels sometimes have a violent sideways swing away from the neutral position, resulting in the shaking of the front landing gear pillar and the fuselage, which will affect the normal operation of the driver in severe cases, and even cause aircraft failure. This kind of complex vibration is called front wheel shimmy, which is a very harmful self-excited vibration. At present, domestic and foreign mainly rely on the installation of front wheel shock absorbers to suppress the shimmy vibration. The front wheel shock absorber generally adopts the oil type shock absorber. When shimmy occurs, the wheel drives the piston to reciprocate in the outer cylinder through the piston rod, forcing the oil...

AI Technical Summary

Problems solved by technology

In order to overcome the disadvantages of the existing undercarriage reducers, which are not adjustable, affected by temperature and oil compression, and have poor adaptability, the present invention provides a controllable sway damping, which is separated from the control system and can be considered to include the temperature of the oil. Semi-active anti-sway device that meets different damping requirements during aircraft taxiing, anti-sway, and control

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