A Method for Determining the Operating Force of Aircraft Hydraulic Brake Valve
A determination method, aircraft hydraulic technology, applied in the direction of fluid pressure actuators, mechanical equipment, servo motor components, etc., can solve the problem of inability to calculate the dynamic control force of the aircraft brake valve, the dynamic study of the control force characteristics of the hydraulic brake valve, and the inability to optimize And improve the pilot's braking control experience and other issues, to achieve the effect of improving the control experience, optimizing the control experience, and improving the control quality
Inactive Publication Date: 2019-07-16
XIAN AVIATION BRAKE TECH
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Problems solved by technology
[0008] In order to overcome the working stroke generated by the pilot’s actual manipulation of the aircraft brake valve in the prior art, the dynamic control force calculation of the aircraft brake valve cannot be performed, so it is impossible to carry out dynamic research on the control force characteristics of the hydraulic brake valve, and it is impossible to optimize and improve the pilot In order to solve problems such as control feeling when braking, the present invention proposes a method for determining the control force of an aircraft hydraulic brake valve
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Embodiment Construction
[0043] This embodiment is a calculation method for determining the required operating force according to the working stroke generated by the pilot's actual manipulation of the aircraft brake valve. The specific process is:
[0044] Step 1, determine the spool travel x:
[0045] Dynamic force analysis of the spool of the hydraulic brake valve during the braking operation. The force mentioned includes the preload F of the spring assembly t0 , the increased elastic force of the decompression spring assembly after being compressed, the reaction force of the hydraulic brake valve sensing pressure chamber, the elastic force of the return spring, the viscous resistance suffered by the spool, and the friction force F on the spool f ; The resultant force formed by the above-mentioned forces is equal to the inertial force of the spool. According to Newton's second law, the following mechanical equation is established by formula 1:
[0046]
[0047] Where: F t0 is the pretightening ...
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The invention discloses an aircraft hydraulic brake valve control force determination method. According to a working operation applied to an aircraft hydraulic brake valve by a pilot, and aiming at gradual building of the brake pressure and dynamic change rules of the brake control force in the pressure keeping and releasing process, the specific and feasible control force determination method isprovided to research and master the change conditions of the needed dynamic control force for detailed dynamic analysis of the brake control process, comprehensive mastering of the control characteristics of the hydraulic brake valve and the change conditions of the control force. In the process of maximizing and keeping the valve element working operation from zero by a period of time and returning to zero, the change conditions of the control force and the valve element working operation, and the brake pressure and the load flow are mastered. The brake system control characteristics are designed based on the method, the pilot control feeling during braking can be optimized and improved, and the control quality of an aircraft brake system is improved.
Description
technical field [0001] The invention relates to the field of wheel brake system control, in particular to a method for determining the control force of a hydraulic brake valve, which is used to evaluate the dynamic control force characteristics of the brake system. Background technique [0002] As an accessory product of the aircraft braking system, the hydraulic brake valve must be manipulated by the pilot to adjust the braking pressure acting on the wheels during take-off and landing taxiing. If the brake system also has anti-skid control function, the hydraulic brake valve can also be used. It functions to limit the maximum brake pressure acting on the wheels. [0003] A typical hydraulic brake valve structure is as follows: figure 1 As shown, it mainly consists of sleeve assembly 1, adjusting gasket 2, decompression spring assembly 3, valve core 4, guide sleeve 5, return spring 6, housing 7, valve sleeve 8, sealing ring 9, retaining ring 10, opening Pin 11, locking nut...
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IPC IPC(8): F15B13/02
CPCF15B13/021
Inventor 张谦张颖姝
Owner XIAN AVIATION BRAKE TECH
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