Design method and system for overweight takeoff of transport plane in high-clearance airport

Abstract

The invention belongs to the technical field of transport plane performance design, and particularly relates to a design method and system for a transport plane to take off in an overweight mode in a high-clearance airport, and the method comprises the steps: firstly, calculating an overweight take-off control speed according to WTO, waiting and transport plane parameters, runway length and performance rules, and judging whether the transport plane takes off in an overweight mode or not; and if yes, the maximum safe stop speed is compared with other parameters in the overweight takeoff control speed, whether one failure occurs or not is judged, and if not, the transport plane takes off normally. On the premise of judging that the overweight takeoff needs to be carried out, whether one failure exists among parameters in the overweight takeoff control speed or not is judged, accurate and quantitative condition judgment whether the overweight takeoff can be carried out or not is carried out in combination with the current takeoff scene condition, and a stable, long-term and large-scale air transportation judgment process is achieved. And whether the transporter can take off or not under the condition that one transporter fails can be accurately judged, and the application range is wide.

Description

Technical Field

[0001] The present application belongs to the technical field of transport aircraft performance design, and in particular relates to a design method and system for a transport aircraft to take off at an overweight position at a high-clearance airport. Background Art

[0002] Transport aircraft are currently the fastest and longest-range transport vehicles in the world. The mission capability of transport aircraft is based on the take-off performance. The take-off performance of transport aircraft is often designed based on airworthiness requirements, taking into account factors such as balanced field length, climb gradient, obstacle clearance and other restrictions.

[0003] The takeoff process of fixed-wing jet transport aircraft can be divided into the takeoff run phase, the takeoff climb phase and the takeoff obstacle clearance phase. In order to ensure the safety of transport aircraft, the airworthiness requirements fully consider the impact of an engine failure on all aspects of the transport aircraft. Specifically, it includes the continued takeoff distance, the interrupted takeoff distance, the climb gradient and the obstacle clearance height. The core purpose of these designs is that even in the extreme case of one engine failure, the transport aircraft can still ensure that it has safe operation options.

[0004] A high-clearance airport refers to an airport with no obstacles on the clearway and no obstacles on the take-off route, such as an airport built on an island or the seaside. If a transport aircraft can reach V2 speed and retract its landing gear, then the transport aircraft will have a greater climb gradient after retracting the landing gear, and the transport aircraft will naturally have the ability to accelerate horizontally after reaching a certain height during take-off and climb. This article believes that reaching V2 speed and retracting the landing gear at a high-clearance airport is a sufficient condition for the transport aircraft to take off and climb and take off over obstacles.

[0005] When transport aircraft are used at high-clearance airports, the actual situation they face is different from the terms of airworthiness requirements. First, after the transport aircraft takes off and rolls, there is no need to consider the impact of obstacles, while the airworthiness terms take the impact of obstacles into account. Secondly, some transport missions are highly risky and there is a difference in safety from airworthiness requirements. The mission to be performed by the transport aircraft requires a takeoff weight of W. TO,待 , the takeoff weight that the airport can support is W TO,允 If W TO,待 >W TO,允 , and the transport aircraft is W TO,待 This is called overweight takeoff. This weight takeoff needs to break through the original airworthiness requirements and design the takeoff performance under certain risks.

[0006] At present, there is a lack of clear overweight takeoff performance design methods for transport aircraft in high-clearance scenarios. First, the traditional takeoff performance design method is based on airworthiness requirements. The design of airworthiness requirements is based on long-term, large-scale, and regular air transportation. The overweight takeoff condition is short-term, small-scale, and occasional air transportation. The two are not completely consistent; secondly, the design of airworthiness requirements takes into account the takeoff safety by fully considering the impact of an engine failure on all aspects of the transport aircraft, but the clearance environment and obstacle clearance environment of high-clearance airports are significantly better than the airworthiness design scenario; finally, facing extremely important transportation tasks, it is necessary to have a set of operational strategies for overweight takeoff under given airport conditions. Therefore, it is very necessary to develop a design method for overweight takeoff of transport aircraft at high-clearance airports. Summary of the invention

[0007] The purpose of this application is to provide a design method and system for overweight takeoff of a transport aircraft at a high-clearance airport, so as to solve the problem that it is difficult for existing transport aircraft to achieve overweight takeoff at a high-clearance airport.

[0008] The technical solution of the present application is: a design method for overweight takeoff of a transport aircraft at a high-clearance airport, comprising:

[0009] Determine the research object of transport aircraft, the given airport, the tasks to be performed by the corresponding transport aircraft, and select the high-clearance airport for the given airport;

[0010] After the mission initiator issues a transport mission requirement based on the mission to be executed, the relevant parameters in the transport mission requirement are obtained to calculate the takeoff weight of the mission to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 Size judgment, and determine whether to take off with overweight, if so, proceed to the next step;

[0011] First, according to W TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max ; Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R≤V R,max <V 2,max ; If yes, the aircraft performs overweight takeoff and proceeds to the next step;

[0012] Maximum speed V at which a safe stop will be achieved 安全中止 The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is a failure of one engine. If not, the transport aircraft takes off normally. If it is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

[0013] Preferably, if W TO,允 ≧W TO,待 , according to W TO,待 Design the flight mission and the design is completed.

[0014] Preferably, if W TO,允 <W TO,待 In the case of W, if the importance of the transport mission reaches the set level, the transport aircraft will TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport.

[0015] Preferably, if it is not V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max , the aircraft cannot complete the takeoff operation and the flight mission ends.

[0016] Preferably, the specific steps of performing different safety operation selections according to different one-shot failure situations are:

[0017] After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is a failure in the process. If there is a failure, then the takeoff is aborted and the transport plane can stop on the runway; determine from V 确定起飞 To V R Is there a failure of one engine? If so, lift the front wheel to take off.

[0018] Judging from V R To V R,max Is there a one engine failure? If there is a one engine failure, the transport aircraft is in an improved climb state.

[0019] Preferably, judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If there is a failure of one engine, the takeoff will be aborted and the transport plane will run off the runway.

[0020] As a specific implementation, a design system for overweight takeoff of a transport aircraft at a high-clearance airport includes a precondition determination module, an overweight determination module, a takeoff determination module, and a takeoff state determination module;

[0021] The precondition determination module can determine the research object of the transport aircraft, the given airport, the tasks to be performed by the corresponding transport aircraft, and the high-clearance airport is selected as the given airport;

[0022] After the mission initiator issues a transport mission requirement based on the mission to be executed, the overweight determination module can obtain the relevant parameters in the transport mission requirement and calculate the takeoff weight of the mission to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 Size judgment, and determine whether to take off with overweight, if so, proceed to the next step;

[0023] The takeoff determination module can firstly TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max ; Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max ; If so, the aircraft performs overweight takeoff and executes the next step; the takeoff state determination module can safely stop the maximum speed V 安全中止 The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is a failure of one engine. If not, the transport aircraft takes off normally. If it is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

[0024] Preferably, if W TO,允 ≧W TO,待 , according to W TO,待 Design the flight mission and the design is completed.

[0025] Preferably, if W TO,允 <W TO,待 In the case of W, if the importance of the transport mission reaches the set level, the transport aircraft will TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport.

[0026] Preferably, if it is not V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max , the aircraft cannot complete the takeoff operation and the flight mission ends.

[0027] Preferably, the specific steps of performing different safety operation selections according to different one-shot failure situations are:

[0028] After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is a failure in the process. If there is a failure, then the takeoff is aborted and the transport plane can stop on the runway; determine from V 确定起飞 To V R Is there a failure of one engine? If so, lift the front wheel to take off.

[0029] Judging from V R To V R,max Is there a one engine failure? If there is a one engine failure, the transport aircraft is in an improved climb state.

[0030] Preferably, judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If there is a failure of one engine, the takeoff will be aborted and the transport plane will run off the runway.

[0031] The design method and system of the transport aircraft taking off at a high-clearance airport in this application, under the premise of determining that an overweight takeoff is required, determines whether there is a failure of one engine among various parameters in the overweight takeoff control speed, and makes an accurate and quantitative determination of whether an overweight takeoff is possible in combination with the current takeoff scene conditions, thereby realizing a stable, long-term, and large-scale air transport determination process. It can also accurately determine whether a transport aircraft can take off under the condition of one engine failure, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0033] Figure 1Design a flow chart for the overall performance of this application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The invention discloses a design method for overweight takeoff of a transport aircraft at a high-clearance airport, which considers the overweight takeoff of the transport aircraft under the condition of the high-clearance airport.

[0036] like Figure 1 As shown, the specific steps include:

[0037] Step S100, determining the transport aircraft research object, a given airport, and a task to be performed for the corresponding transport aircraft;

[0038] Preferably, the transport aircraft is a fixed-wing multi-engine jet transport aircraft, and the given airport is a high-clearance airport.

[0039] Step S200: After the task initiator issues a transport task requirement according to the task to be executed, the relevant parameters in the transport task requirement are obtained to calculate the takeoff weight of the task to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 The size is judged and it is determined whether to perform overweight takeoff. If so, proceed to the next step.

[0040] If W TO,允 ≧W TO,待 , indicating that the transport aircraft mission capability exceeds or is equal to the mission capability to be performed. TO,待 Just design the flight mission and the design is complete;

[0041] If W TO,允 <W TO,待 If the transport mission importance reaches the set level, the transport mission capability is lower than the mission capability to be performed. If the transport mission is required to operate according to the performance specification, the mission cannot be performed and the design ends. TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport. The mission importance level is determined according to the existing importance level.

[0042] Step S300: The danger of an overweight takeoff of a transport aircraft is greater than that of a normal takeoff. On the one hand, the balance field length requirement of the transport aircraft may exceed the capacity of the airport. On the other hand, the constraints of the transport aircraft's takeoff climb may not be met. Finally, the constraints of the transport aircraft's takeoff obstacle clearance may not be met. The high-clearance airport targeted in this article has no obstacles on the clearway and no obstacles on the takeoff route.

[0043] Based on this problem, the transport aircraft takes off with overweight, first according to W TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max .

[0044] Where 1) V 安全中止 - the maximum speed at which the aircraft can abort takeoff and come to a safe stop;

[0045] 2) V 确定起飞 ——The plane continues to take off and achieves V R , minimum speed of V2;

[0046] 3) V R ——Raise the front wheel speed, considering one engine failure, V2 can be achieved;

[0047] 4) V R,max --- With all engines working, the maximum nose wheel rotation speed allowed by the runway length;

[0048] 5) V2 - safe take-off speed, determined by airworthiness requirements, with landing gear retracted;

[0049] 6) V 2,max ——With all engines working, the maximum safe takeoff speed allowed by the runway length.

[0050] In this application, it is assumed that the transport aircraft reaches V2 speed at a high-clearance airport and can retract the landing gear, which is a sufficient condition for the transport aircraft to take off and climb and take off over obstacles. In this way, the focus of the transport aircraft's overweight takeoff is on the takeoff run process.

[0051] Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,maxIf not, it means that the aircraft cannot complete the takeoff operation and the flight mission ends; if yes, the aircraft performs an overweight takeoff and proceeds to the next step.

[0052] Step S400, overweight takeoff process.

[0053] Maximum speed V at which a safe stop will be achieved 安全中止 The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is an engine failure. If not, the transport aircraft takes off normally.

[0054] The specific steps to determine whether there is a one-shot failure are:

[0055] After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is an engine failure in the process. If there is an engine failure, then the takeoff is aborted, the transport aircraft can stop on the runway, and can continue the takeoff run;

[0056] Judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If so, the takeoff will be aborted and the transport plane will run off the runway.

[0057] Judging from V 确定起飞 To V R Is there a failure of one engine? If so, the transport aircraft can lift the front wheel for takeoff, lift off, retract the landing gear, and retract the flaps.

[0058] Judging from V R To V R,max Is there a one-engine failure? If there is a one-engine failure, the transport aircraft is in an improved climb state;

[0059] If all engines are working, the transport aircraft is at V R,max Lift the front wheels to take off, the transport aircraft has a V R Speed-lift front wheel operation for greater safety.

[0060] During the entire overweight takeoff process, the transport aircraft is in V 安全中止 To V 确定起飞 The most dangerous is if one engine fails, the transport plane will run off the runway.

[0061] When the judgment is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

[0062] In summary, under the premise of determining that an overweight takeoff is required, a judgment is made as to whether there is a failure of one engine among various parameters in the overweight takeoff control speed, and an accurate and quantitative judgment is made on whether an overweight takeoff is possible in combination with the current takeoff scenario conditions, thus realizing a stable, long-term, and large-scale air transport judgment process. It can also accurately judge whether a transport aircraft can take off under the condition of one engine failure, and has a wide range of applications.

[0063] As a specific implementation, it also includes a design system for overweight takeoff of a transport aircraft at a high-clearance airport, including a precondition determination module, an overweight determination module, a takeoff determination module and a takeoff status determination module.

[0064] The precondition determination module can determine the research object of the transport aircraft, the given airport, the tasks to be performed by the corresponding transport aircraft, and the high-clearance airport is selected as the given airport;

[0065] After the mission initiator issues a transport mission requirement based on the mission to be executed, the overweight determination module can obtain the relevant parameters in the transport mission requirement and calculate the takeoff weight of the mission to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 Size judgment, and determine whether to take off with overweight, if so, proceed to the next step;

[0066] The takeoff determination module can firstly TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max ; Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max ; If yes, the aircraft performs overweight takeoff and proceeds to the next step;

[0067] The maximum speed V at which the takeoff state determination module can safely stop 安全中止The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is a failure of one engine. If not, the transport aircraft takes off normally. If it is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

[0068] Preferably, if W TO,允 ≧W TO,待 , according to W TO,待 Design the flight mission and the design is completed.

[0069] Preferably, if W TO,允 <W TO,待 In the case of W, if the importance of the transport mission reaches the set level, the transport aircraft will TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport.

[0070] Preferably, if it is not V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max , the aircraft cannot complete the takeoff operation and the flight mission ends.

[0071] Preferably, the specific steps of performing different safety operation selections according to different one-shot failure situations are:

[0072] After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is a failure in the process. If there is a failure, then the takeoff is aborted and the transport plane can stop on the runway; determine from V 确定起飞 To V R Is there a failure of one engine? If so, lift the front wheel to take off.

[0073] Judging from V R To V R,max Is there a one engine failure? If there is a one engine failure, the transport aircraft is in an improved climb state.

[0074] Preferably, judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If there is a failure of one engine, the takeoff will be aborted and the transport plane will run off the runway.

[0075] Finally, it should be noted that: the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0076] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A design method for overweight takeoff of a transport aircraft at a high-clearance airport, characterized in that: include: Determine the research object of transport aircraft, the given airport, the tasks to be performed by the corresponding transport aircraft, and select the high-clearance airport for the given airport; After the mission initiator issues a transport mission requirement based on the mission to be executed, the relevant parameters in the transport mission requirement are obtained to calculate the takeoff weight of the mission to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 Size judgment, and determine whether to take off with overweight, if so, proceed to the next step; First, according to W TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max ; Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max ; If yes, the aircraft performs overweight takeoff and proceeds to the next step; Maximum speed V at which a safe stop will be achieved 安全中止 The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is a failure of one engine. If not, the transport aircraft takes off normally. If it is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

2. The design method for overweight takeoff of a transport aircraft at a high-clearance airport as claimed in claim 1, characterized in that: If W TO,允 ≧W TO,待 , according to W TO,待 Design the flight mission and the design is completed.

3. The design method for overweight takeoff of a transport aircraft at a high-clearance airport as claimed in claim 1, characterized in that: If W TO,允 <W TO,待 In the case of W, if the importance of the transport mission reaches the set level, the transport aircraft will TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport.

4. The design method for overweight takeoff of a transport aircraft at a high-clearance airport as claimed in claim 1, characterized in that: If it is not V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max , the aircraft cannot complete the takeoff operation and the flight mission ends.

5. The design method for overweight takeoff of a transport aircraft at a high-clearance airport as claimed in claim 1, characterized in that: The specific steps for selecting different safety operations according to different one-shot failure situations are as follows: After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is a failure in the process. If there is a failure, then the takeoff is aborted and the transport plane can stop on the runway; determine from V 确定起飞 To V R Is there a failure of one engine? If so, lift the front wheel to take off. Judging from V R To V R,max Is there a one engine failure? If there is a one engine failure, the transport aircraft is in an improved climb state.

6. The design method for overweight takeoff of a transport aircraft at a high-clearance airport as claimed in claim 1, characterized in that: Judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If there is a failure of one engine, the takeoff will be aborted and the transport plane will run off the runway.

7. A design system for transport aircraft taking off at a high-clearance airport with overweight, the design method according to any one of claims 1 to 6, characterized in that: It includes a precondition determination module, an overweight determination module, a takeoff determination module and a takeoff state determination module; The precondition determination module can determine the research object of the transport aircraft, the given airport, the tasks to be performed by the corresponding transport aircraft, and the high-clearance airport is selected as the given airport; After the mission initiator issues a transport mission requirement based on the mission to be executed, the overweight determination module can obtain the relevant parameters in the transport mission requirement and calculate the takeoff weight of the mission to be executed as W. TO,待 The transport execution unit combines the transport aircraft parameters, airport conditions and performance specifications to calculate the takeoff weight of the transport aircraft supported by the airport as W. TO,允 ; The take-off weight for the mission to be performed is W TO,待 The take-off weight of the transport aircraft supported by the airport is W TO,允 Size judgment, and determine whether to take off with overweight, if so, proceed to the next step; The takeoff determination module can firstly TO,待 , transport aircraft parameters, runway length, performance rules to calculate overweight takeoff control speed, including the maximum speed V for safe stop 安全中止 , realize V R and V2's minimum speed V 确定起飞 , front wheel speed V R , Maximum front wheel lifting speed V R,max , takeoff safety speed V2, maximum takeoff safety speed V 2,max ; Determine whether it is V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max ; If so, the aircraft performs overweight takeoff and executes the next step; the takeoff state determination module can safely stop the maximum speed V 安全中止 The parameters are compared with other parameters in the overweight takeoff control speed to determine whether there is a failure of one engine. If not, the transport aircraft takes off normally. If it is not V 安全中止 To V 确定起飞 When one of the missiles fails, different safety operation options are selected according to different situations of failure.

8. The design system for transport aircraft taking off at an overweight position at a high-clearance airport as claimed in claim 7, characterized in that: If W TO,允 ≧W TO,待 , according to W TO,待 Design the flight mission and the design is completed.

9. The design system for transport aircraft taking off at an overweight position at a high-clearance airport as claimed in claim 7, characterized in that: If W TO,允 <W TO,待 In the case of W, if the importance of the transport mission reaches the set level, the transport aircraft will TO,待 The flight mission is designed so that the transport aircraft performs an overweight takeoff at the airport.

10. The design system for transport aircraft taking off at an overweight position at a high-clearance airport as claimed in claim 7, characterized in that: If it is not V 安全中止 <V 确定起飞 ≤V R <V2,V R ≤V R,max <V 2,max , the aircraft cannot complete the takeoff operation and the flight mission ends.

11. The design system for transport aircraft taking off at an overweight position at a high-clearance airport as claimed in claim 7, characterized in that: The specific steps for selecting different safety operations according to different one-shot failure situations are as follows: After taking off and releasing the brakes, the transport aircraft accelerates with all engines working, reaching V 安全中止 , determine whether there is a failure in the process. If there is a failure, then the takeoff is aborted and the transport plane can stop on the runway; determine from V 确定起飞 To V R Is there a failure of one engine? If so, lift the front wheel to take off. Judging from V R To V R,max Is there a one engine failure? If there is a one engine failure, the transport aircraft is in an improved climb state.

12. The design system for transport aircraft taking off at an overweight position at a high-clearance airport as claimed in claim 7, characterized in that: Judging from V 安全中止 To V 确定起飞 Is there a failure of one engine? If there is a failure of one engine, the takeoff will be aborted and the transport plane will run off the runway.

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