Resolution method for starting incidence angle of push rod device of large fire-extinguishing amphibious aircraft
An amphibious aircraft and pusher technology, which is applied in instrumentation, calculation, computer-aided design, etc., can solve problems such as lack of data, and achieve the effects of reducing the probability of occurrence, simple logic for angle of attack calculation, and simple logic structure.
Pending Publication Date: 2022-01-14
中航通飞华南飞机工业有限公司
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[0004] This method is combined with the amphibious aircraft prototype currently being developed in China to calculate the starting angle of attack of the pusher. There is no data for reference.
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[0039] This part is the embodiment of the present invention, which is used to explain and illustrate the technical effects of the present invention.
[0040] A calculation method for the starting angle of attack of the pusher of a large fire-fighting amphibious aircraft. According to the aircraft flap deflection δf, Mach number Ma and sideslip angle β, the reference value of the aircraft’s pusher angle of attack αTG0 is obtained by interpolation, and then obtained by rate of change of angle of attack and the flap deflection δf interpolation to obtain the correction value of the pusher start angle of attack △α; finally use the pusher start angle correction amount △α to correct the reference value of the aircraft pusher angle of attack αTG0 to obtain the pusher start angle of attack Angle α.
[0041] Specifically include the following steps:
[0042] Step 1, according to the formula (1), calculate the putter angle of attack reference value αTG0:
[0043] alpha TG0 =f(δ f ...
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The invention belongs to the technical field of large-scale fire-extinguishing amphibious aircrafts, and discloses a large-scale fire-extinguishing amphibious aircraft push rod device starting attack angle resolving method, which comprises the following steps: obtaining a push rod attack angle reference value of an aircraft through interpolation according to aircraft flap skewness, Mach number and sideslip angle; obtaining the starting attack angle correction amount of the push rod device through the attack angle change rate and flap skewness interpolation; and finally, correcting the push rod attack angle reference value of the aircraft by using the push rod device starting attack angle correction amount to obtain the starting attack angle of the push rod device. The logic structure is simple, and the starting threshold value of the aircraft push rod device can be conveniently and rapidly obtained; through the logic design of the push rod attack angle reference value and the attack angle correction amount, the attack angle calculation logic can be more concise; and the occurrence probability of takeoff mistaken push can be greatly reduced through the takeoff correction factor.
Description
technical field [0001] The invention belongs to the technical field of large-scale fire-fighting amphibious aircraft, and relates to a stall protection control of a large-scale fire-fighting amphibious aircraft, in particular to a method for calculating the starting angle of attack of a push rod of a large-scale fire-extinguishing amphibious aircraft. Background technique [0002] At present, there are many domestic and foreign aircraft that use push rods as a means of stall protection, such as the ARJ-21 regional airliner in China, and the BAe-146 aircraft in foreign countries. [0003] Due to the different stall characteristics of different aircraft, the nonlinear aerodynamic characteristics of the near-stall region are also quite different, so the calculation logic of the pusher start angle of attack is also different. [0004] This method is combined with the amphibious aircraft prototype being developed in China to calculate the angle of attack of the pusher, and there ...
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IPC IPC(8): G06F30/15G06F30/28G06F113/08G06F119/14
CPCG06F30/15G06F30/28G06F2113/08G06F2119/14Y02T90/00
Inventor 廖海君曹春泉陶洪娟
Owner 中航通飞华南飞机工业有限公司