A method and system for trim test flight of a tropospheric manned airship

Abstract

This invention provides a method and system for trim test flights of tropospheric manned airships. The method includes: Step 1: Configuring the system according to preset test conditions; Step 2: Vertical takeoff, climbing to a first preset altitude range and then transitioning to level flight; Step 3: Adjusting the flight speed to the minimum airspeed; Step 4: Adjusting the air volume of the front and rear auxiliary gasbags to operate the elevator to the neutral position; Step 5: Maintaining the current flight altitude and airspeed at level flight for a preset duration; Step 6: Checking whether the airship maintains level flight and whether the elevator is in the neutral position during flight; if so, proceeding to Step 7; Step 7: Adjusting the flight speed and repeating Steps 4 to 6 until the flight speed reaches the maximum level flight speed, ending the test flight. This achieves a repeatable and standardized test flight scheme, standardizing the test flight weight, center of gravity, procedures, and methods to form unified verification requirements, thereby improving the efficiency and quality of trim test flights for tropospheric manned airships.

Description

Technical Field

[0001] This invention belongs to the field of flight test technology, specifically relating to a method and system for trim test flight of a tropospheric manned airship. Background Technology

[0002] Currently, China lacks flight test technologies and methods for the qualification certification of tropospheric airships. There is a need to propose repeatable and standardized flight test requirements for airships, and to standardize flight test weight, center of gravity, procedures, and methods to form unified verification requirements, thereby improving the efficiency and quality of manned airship flight tests.

[0003] The Civil Aviation Administration of China (CAAC) issued a type certification for the airship (AC-21-AA-2009-09R1), which adopted FAA P-8110-2 airship design guidelines, specifically Clause 2.17 regarding trim. This clause explicitly requires that, after static trim and balancing, the airship, with its ascent and descent control devices approximately in a neutral position, be able to fly horizontally at all speeds in still air. Based on this requirement, this invention clarifies the test flight conditions and methods for airship trim and provides qualification criteria. Summary of the Invention

[0004] This invention provides a method and system for trim test flights of tropospheric manned airships, which clarifies the test flight status and methods for airship trim and provides qualification criteria, filling the gap in test flight methods for trim flight of tropospheric manned airships and improving the efficiency and quality of manned airship test flights.

[0005] The first aspect of this invention provides a method for trim test flight of a tropospheric manned airship, comprising:

[0006] Step 1: Configure according to the preset test conditions;

[0007] Step 2: Take off vertically, and switch to level flight when you reach the first preset altitude range;

[0008] Step 3: Adjust the flight speed to the minimum airspeed;

[0009] The fourth step is to gradually move the elevator to the neutral position by adjusting the air volume of the front and rear auxiliary airbags.

[0010] Step 5: Maintain the current flight altitude and airspeed for at least the preset time.

[0011] Step 6: During flight, check whether the airship is maintaining level flight and whether the elevator is in a neutral position; if so, proceed to Step 7.

[0012] Step 7: Adjust the flight speed and repeat steps 4 to 6 until the flight speed reaches the maximum level flight speed, then end the test flight.

[0013] Optional methods for trim test flights of tropospheric manned airships also include:

[0014] If the airship is unable to maintain level flight or the elevator is not in a neutral position during the flight within the preset time, then step four will be executed again.

[0015] Optionally, the test conditions are the airship's maximum static weight and front center of gravity, or the airship's maximum static weight and rear center of gravity.

[0016] Optionally, the first preset height range is 300m to 500m.

[0017] Optional, the preset duration is 10 seconds.

[0018] A second aspect of the present invention provides a tropospheric manned airship trim test flight system, comprising: an airship and a test flight device;

[0019] The test flight device is used to configure the airship according to preset test conditions, control the airship to take off vertically, climb to a first preset altitude range and then switch to level flight; adjust the airship's flight speed to the minimum airspeed; gradually operate the elevator to a near-neutral position by adjusting the air volume of the front and rear auxiliary gasbags; maintain level flight at the current flight altitude and airspeed for more than a preset time; within the preset time, check whether the airship maintains level flight and whether the elevator is in the neutral position; if so, adjust the flight speed and readjust the air volume of the front and rear auxiliary gasbags to enable the airship to level flight again for more than a preset time, until the flight speed reaches the maximum level flight speed, and the test flight ends.

[0020] Optionally, the test flight device is also used to, if the airship cannot maintain level flight or the elevator is not in the neutral position during flight within a preset time period, readjust the air volume of the front and rear auxiliary airbags to check whether the airship maintains level flight and whether the elevator is in the neutral position.

[0021] Optionally, the test conditions are the airship's maximum static weight and front center of gravity, or the airship's maximum static weight and rear center of gravity.

[0022] Optionally, the first preset height range is 300m to 500m.

[0023] Optional, the preset duration is 10 seconds.

[0024] This invention provides a method and system for trim test flights of tropospheric manned airships, filling the gap in the trim type qualification certification test flight method for tropospheric manned airships. It realizes a repeatable and standardized test flight scheme, standardizes the test flight weight, center of gravity, test flight procedures, and test flight methods, forms unified verification requirements, and improves the test flight efficiency and test flight quality of tropospheric manned airship trim. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart of the flight test process for the present invention. Detailed Implementation

[0027] The method for trim test flight of tropospheric manned airships provided by the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this invention provides a method for trim test flights of a tropospheric manned airship suitable for FAA P-8110-2, the method comprising the following steps:

[0029] Step 1: Select the maximum static weight, front center of gravity and maximum static weight, rear center of gravity of the airship as the test conditions respectively;

[0030] Step 2: Take off vertically according to the standard flight procedure, climb normally to an altitude of 300m-500m and then switch to level flight;

[0031] Step 3: At minimum airspeed, manually adjust the air volume of the front and rear auxiliary airbags and gradually operate the elevator to a near neutral position.

[0032] Step 4: Maintain flight altitude and airspeed at level for more than 10 seconds;

[0033] Step 5: During flight, the pilot checks whether the airship is maintaining level flight and whether the elevator is in the neutral position;

[0034] Step 6: Adjust the flight speed. Repeat step 3 to manually adjust the airbags until step 5, until the flight speed reaches the maximum level flight speed.

[0035] This invention fills a gap in the flight test method for trimming type qualification certification of tropospheric manned airships, realizes a repeatable and standardized flight test program, and standardizes the flight test weight, center of gravity, flight test procedures and flight test methods to form unified verification requirements, thereby improving the flight test efficiency and flight test quality of tropospheric manned airship trimming.

[0036] In a specific embodiment of the present invention, the test flight process for the trim certification of a certain manned airship is as follows:

[0037] 1) Before the test, set the weight, center of gravity position, etc. according to the test requirements;

[0038] 2) The airship took off normally and climbed to an altitude of 500m;

[0039] 3) At an altitude of 500m, on three sides, adjust the airship's flight speed to the minimum level flight speed of 37km / h;

[0040] 4) Adjust the airship airbag pressure system control mode to manual mode, manually control the air volume of the front and rear auxiliary airbags, and gradually operate the elevator to a near neutral position.

[0041] 5) Maintain the current flight altitude and airspeed and fly steadily at level for more than 10 seconds;

[0042] 6) During flight, the pilot checks whether the airship is maintaining level flight and whether the elevator is in the neutral position. If any of the above conditions are not met, the test flight is repeated. Once all the above conditions are met, the subsequent test flights continue.

[0043] 7) Repeat steps 4) to 6) at indicated airspeeds of (50±3) km / h, (70±3) km / h, and maximum level flight speed (which is also the maximum continuous power speed);

[0044] 8) The above tests were conducted under the two test conditions of maximum static weight and front center of gravity of the airship and maximum static weight and rear center of gravity, respectively.

Claims

1. A method for trim test flight of a tropospheric manned airship, characterized in that, include: Step 1: Configure according to the preset test conditions; Step 2: Take off vertically, and switch to level flight when you reach the first preset altitude range; Step 3: Adjust the flight speed to the minimum airspeed; The fourth step is to gradually move the elevator to the neutral position by adjusting the air volume of the front and rear auxiliary airbags. Step 5: Maintain the current flight altitude and airspeed for at least the preset time. Step 6: During flight, check whether the airship is maintaining level flight and whether the elevator is in a neutral position; if so, proceed to Step 7. Step 7: Adjust the flight speed and repeat steps 4 to 6 until the flight speed reaches the maximum level flight speed, then end the test flight.

2. The method for trim test flight of a tropospheric manned airship according to claim 1, characterized in that, The method further includes: If the airship is unable to maintain level flight or the elevator is not in a neutral position during the flight within the preset time, then step four will be executed again.

3. The method for trim test flight of a tropospheric manned airship according to claim 1, characterized in that, The test conditions are the airship's maximum static weight and front center of gravity, or the airship's maximum static weight and rear center of gravity.

4. The method for trim test flight of a tropospheric manned airship according to claim 1, characterized in that, The preset duration is 10 seconds.

5. The method for trim test flight of a tropospheric manned airship according to claim 1, characterized in that, The first preset height range is 300m to 500m.

6. A tropospheric manned airship trim test flight system, characterized in that, include: Airships and test flight equipment; The test flight device is used to configure the airship according to preset test conditions, control the airship to take off vertically, climb to a first preset altitude range and then switch to level flight; adjust the airship's flight speed to the minimum airspeed; gradually operate the elevator to a near-neutral position by adjusting the air volume of the front and rear auxiliary gasbags; maintain level flight at the current flight altitude and airspeed for more than a preset time; within the preset time, check whether the airship maintains level flight and whether the elevator is in the neutral position; if so, adjust the flight speed and readjust the air volume of the front and rear auxiliary gasbags to enable the airship to level flight again for more than a preset time, until the flight speed reaches the maximum level flight speed, and the test flight ends.

7. The tropospheric manned airship trim test flight system according to claim 6, characterized in that, The test flight device is also used to readjust the air volume of the front and rear auxiliary airbags if the airship cannot maintain level flight or the elevator is not in the neutral position within a preset time period, and to check whether the airship maintains level flight and whether the elevator is in the neutral position.

8. The tropospheric manned airship trim test flight system according to claim 6, characterized in that, The test conditions are the airship's maximum static weight and front center of gravity, or the airship's maximum static weight and rear center of gravity.

9. The tropospheric manned airship trim test flight system according to claim 6, characterized in that, The first preset height range is 300m to 500m.

10. The tropospheric manned airship trim test flight system according to claim 6, characterized in that, The preset duration is 10 seconds.

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