A method for stability testing of tropospheric manned airships

Abstract

This invention discloses a flight stability test method suitable for manned tropospheric airships. The method involves selecting a flight speed that allows the airship to maintain stable level flight; the airship takes off and climbs to a preset altitude according to normal procedures; at the selected speed in the second step, the airship is leveled using auxiliary gasbags and maintained in stable level flight; the control stick is quickly pulled back to its full stroke and held for a period of time, then returned to the initial trim position, and a response is awaited; the airship is adjusted to the trim state and leveled, the control stick is quickly pushed back to its full stroke and held for a certain period of time, then returned to the initial trim position, and a response is awaited, ending the mission; using the trim heading angle as a reference, the rudder is manipulated to the left to deflect the heading angle to the left by a certain angle, then returned to the initial trim position, and a response is awaited; the control stick is then manipulated to the right to deflect the heading angle to the right by a certain angle, then returned to the initial trim position, and a response is awaited, ending the mission; after the test, the airship is maneuvered to a smooth landing. A repeatable and standardized flight test scheme is proposed.

Description

Technical Field

[0001] This invention belongs to the field of airship test flight technology, and in particular relates to a stability test flight method suitable for manned airships in the troposphere. Background Technology

[0002] Flight tests have verified that after the airship coordinates the use of auxiliary thrust control and lift control and trims at the corresponding flight speed, it must have sufficient pitch and directional stability during stable non-acceleration flight in ascent, descent, and level flight to ensure that the pilot does not become excessively fatigued and is not distracted from normal work.

[0003] To date, there is a need to achieve repeatable and standardized test flight requirements for airships, standardizing test flight weight, center of gravity, procedures, and methods to form unified verification requirements, improve the efficiency and quality of manned airship test flights, and ensure test flight safety. Summary of the Invention

[0004] Purpose of the invention

[0005] In order to design repeatable and standardized airship test requirements, this invention provides a stability test method for manned airships in the troposphere.

[0006] Invention Technology Solutions

[0007] A method for stability testing of tropospheric manned airships includes the following steps:

[0008] Step 1: Select experimental conditions;

[0009] Step 2: Select a flight speed that allows the airship to maintain stable level flight;

[0010] Step 3: The airship takes off according to the normal procedure and climbs to the preset altitude;

[0011] Step 4: At the speed selected in Step 2, maintain stable level flight of the airship by adjusting the auxiliary gasbags (with the control surfaces in an approximately neutral position);

[0012] Step 5: Quickly pull the stick back to its full stroke and hold for a period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete; adjust the airship to the trim state and maintain level flight, quickly push the stick back to its full stroke and hold for a certain period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete, and the mission is over;

[0013] Step 6: Repeat step 4;

[0014] Step 7: Using the trim heading angle as a reference, push the rudder to the left to deflect the heading angle to the left by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. Push the rudder to the right to deflect the heading angle to the right by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. The mission is now complete.

[0015] Step 8: After the test, maneuver the airship to a smooth landing.

[0016] Preferably, the maximum static weight and rear center of gravity of the airship are selected as the test conditions in the first step.

[0017] Preferably, in the second step, select 1 to 3 flight speeds that can keep the airship flying stably and level. If more than 1 flight speed is selected in the second step, then after the seventh step, adjust the airship's flight speed according to the speed selected in the second step and repeat steps four to seven until all the flight speeds selected in the second step have been tested.

[0018] Preferably, in the second step, the flight speed is selected from the maximum speed, minimum speed, and intermediate speed that enable the airship to maintain stable level flight, with the intermediate speed being a value near the midpoint between the maximum and minimum speeds.

[0019] Preferably, in the fifth step, the lever is quickly pulled to its full stroke and held for 3 to 10 seconds.

[0020] Preferably, in step five, the rod is returned to the initial balancing position twice, and a wait of more than 10 seconds is required for each return.

[0021] Preferably, in the fifth step, the lever is quickly pushed to its full stroke and held for 3 to 10 seconds.

[0022] Preferably, in the seventh step, the rudder is pushed to the left to deflect the heading angle 10° to 15° to the left.

[0023] Preferably, in the seventh step, the rudder is pushed to the right to deflect the heading angle 10° to 15° to the left.

[0024] Preferably, if the airship is smoothly controlled and maneuver safely during the flight in step eight, and the airship's control response matches the pilot's expectations and flight theory analysis, then the test is valid.

[0025] Advantages of this invention: This method fills the gap in flight test methods for tropospheric manned airship flight stability testing, proposes a repeatable and standardized flight test scheme, forms unified verification requirements, improves the efficiency and quality of manned airship flight tests, and ensures flight test safety. Attached Figure Description

[0026] Figure 1 This is a flowchart of a flight test method for the stability testing of a tropospheric manned airship, according to the present invention. Detailed Implementation

[0027] The present invention is achieved through the following technical solution.

[0028] A method for stability testing of tropospheric manned airships includes the following steps:

[0029] Step 1: Select test conditions; the maximum static weight and rear center of gravity of the airship are preferred as test conditions.

[0030] Step 2: Select a flight speed that allows the airship to maintain stable level flight. Multiple flight speeds can be selected as needed. For example, in Step 2, select 1 to 3 flight speeds that allow the airship to maintain stable level flight. If more than one flight speed is selected in Step 2, then after Step 7, adjust the airship's flight speed according to the speed selected in Step 2 and repeat Steps 4 to 7 until all flight speeds selected in Step 2 have been tested.

[0031] In the second step, the flight speed is usually selected from the maximum speed, minimum speed, and intermediate speed that can keep the airship flying stably. The intermediate speed is a value near the midpoint between the maximum speed and the minimum speed.

[0032] Step 3: The airship takes off according to the normal procedure and climbs to the preset altitude;

[0033] Step 4: At the speed selected in Step 2, maintain stable level flight of the airship by adjusting the auxiliary gasbags (with the control surfaces in an approximately neutral position);

[0034] Step 5: Quickly pull the stick back to its full stroke and hold for a period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete; adjust the airship to the trim state and maintain level flight, quickly push the stick back to its full stroke and hold for a certain period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete, and the mission is over;

[0035] Preferably, in the fifth step, the lever is quickly pulled to its full stroke and held for 3 to 10 seconds.

[0036] Preferably, in step five, the rod is returned to the initial balancing position twice, and a wait of more than 10 seconds is required for each return.

[0037] Preferably, in the fifth step, the lever is quickly pushed to its full stroke and held for 3 to 10 seconds.

[0038] Step 6: Repeat step 4;

[0039] Step 7: Using the trim heading angle as a reference, push the rudder to the left to deflect the heading angle to the left by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. Push the rudder to the right to deflect the heading angle to the right by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. The mission is now complete.

[0040] Preferably, in the seventh step, the rudder is pushed to the left to deflect the heading angle 10° to 15° to the left.

[0041] Preferably, in the seventh step, the rudder is pushed to the right to deflect the heading angle 10° to 15° to the left.

[0042] Step 8: After the test, maneuver the airship to a smooth landing.

[0043] Preferably, if the airship is smoothly controlled and maneuver safely during the flight in step eight, and the airship's control response matches the pilot's expectations and flight theory analysis, then the test is valid.

[0044] Taking the stability test flight of a manned airship as an example, the test flight process includes the following steps:

[0045] 1) Before the test, set the weight, center of gravity position, etc. according to the test requirements.

[0046] 2) The airship takes off according to normal procedures and climbs to an altitude of 500m.

[0047] 3) After leveling the airship with the auxiliary gasbag (with the control surfaces in a near-neutral position), maintain the airship at a stable level flight speed of 37 km / h for more than 10 seconds.

[0048] 4) Quickly pull the lever to its full stroke and hold for more than 3 seconds, then return the lever to the initial balancing position and wait for more than 10 seconds for the response time to complete.

[0049] 5) Adjust the airship to the trim state again using the auxiliary airbag. After stable level flight for more than 10 seconds, quickly push the stick to the full stroke and hold for more than 3 seconds. Then return the stick to the initial trim position and wait for more than 10 seconds for the response time to complete. The mission is over.

[0050] 6) Repeat step 3).

[0051] 7) Using the trim heading angle as a reference, push the rudder to the left to make the heading angle deflect to the left by about 10°, then return the rudder to the initial trim position and wait for more than 10 seconds to complete the response.

[0052] 8) Adjust the airship to the trim state again using the auxiliary gasbag. After stable level flight for more than 10 seconds, push the stick to the right to deflect the heading angle to the right by about 10°. Then return the stick to the initial trim position and wait for more than 10 seconds to complete the response. The mission is over.

[0053] 9) Adjust the flight speed and repeat steps 3) to 8).

[0054] 10) After the test, maneuver the airship to a smooth landing. If the airship is smoothly maneuvered and safe during the flight, and the test pilot does not require special piloting skills, then the test is valid.

[0055] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent transformations or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention. The technologies, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A method for stability testing of tropospheric manned airships, characterized in that, Includes the following steps: Step 1: Select experimental conditions; Step 2: Select a flight speed that allows the airship to maintain stable level flight; Step 3: The airship takes off according to the normal procedure and climbs to the preset altitude; Step 4: At the speed selected in Step 2, maintain stable level flight of the airship by adjusting the auxiliary gasbags; Step 5: Quickly pull the stick back to its full stroke and hold for a period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete; adjust the airship to the trim state and maintain level flight, quickly push the stick back to its full stroke and hold for a certain period of time, then return the stick to the initial trim position and wait for a period of time for the response to complete, and the mission is over; Step 6: Repeat step 4; Step 7: Using the trim heading angle as a reference, push the rudder to the left to deflect the heading angle to the left by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. Push the rudder to the right to deflect the heading angle to the right by a certain angle, then return the rudder to the initial trim position and wait for the airship to respond. The mission is now complete. Step 8: After the test, maneuver the airship to a smooth landing.

2. The method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the first step, the maximum static weight and rear center of gravity of the airship were selected as the experimental conditions.

3. The method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the second step, select 1 to 3 flight speeds that can keep the airship flying stably and level. If more than one flight speed is selected in the second step, then after the seventh step, adjust the airship's flight speed according to the speed selected in the second step and repeat steps four through seven until all the flight speeds selected in the second step have been tested.

4. The method for stability testing of a tropospheric manned airship as described in claim 3, characterized in that, In the second step, the flight speed is selected from the maximum speed, minimum speed, and intermediate speed that can keep the airship flying stably and level. The intermediate speed is a value near the midpoint between the maximum speed and the minimum speed.

5. A flight stability test method for tropospheric manned airships as described in claim 1, characterized in that, In the fifth step, quickly pull the lever at full stroke and hold for 3 to 10 seconds.

6. The method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the fifth step, return the lever to the initial balancing position twice, and wait for more than 10 seconds each time.

7. The method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the fifth step, quickly push the lever at full stroke and hold for 3 to 10 seconds.

8. The method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the seventh step, the rudder is pushed to the left to deflect the heading angle 10°~15° to the left.

9. A method for stability testing of a tropospheric manned airship as described in claim 1, characterized in that, In the seventh step, the rudder is pushed to the right to make the heading angle deflect 10° to 15° to the left.

10. A flight stability test method for tropospheric manned airships as described in claim 1, characterized in that, If, during the eighth step, the airship is smoothly controlled and maneuvered safely, and the airship's control response matches the pilot's expectations and flight theory analysis, then the test is valid.

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