A method and system for determining a risk-weighted time-overrun launch of a transport

Abstract

The application belongs to the technical field of transport aircraft performance design, and particularly relates to a method and system for determining over-weight take-off of a transport aircraft considering risk time, wherein after a task initiating unit issues a transport task demand according to a to-be-executed task, the task initiating unit calculates a take-off weight of the to-be-executed task according to related parameters in the transport task demand; the task initiating unit calculates a maximum weight of the transport aircraft taking off at the airport according to airworthiness requirements, and judges the size of the take-off weight and the maximum weight; when the transport aircraft takes off in an over-weight manner, the task initiating unit evaluates a risk time of a take-off process; through comparison of the weight and the time, accurate and quantitative condition determination of whether the transport aircraft can take off is performed in combination with a current take-off scene condition, so that a stable, long-term and large amount of air transportation determination process is realized. Meanwhile, accurate determination of a one-shot failure can be performed, and accurate determination of whether the transport aircraft can take off under the one-shot failure condition can be performed through the time, so that the application range is wide.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transport aircraft performance design, and particularly relates to a method and system for determining the takeoff of a transport aircraft considering the risk time overweight. BACKGROUND

[0002] Transport aircraft is the current military rapid, long-distance transport tool, the mission capability of transport aircraft is based on the result of takeoff performance. For convenience of description, the following takeoff weight concepts are involved in this paper.

[0003] W 结构 -transport aircraft parameters determine the maximum takeoff weight of the transport aircraft;

[0004] W 机场 -airport conditions determine the allowable takeoff weight of the airport;

[0005] W 适航 -considering the allowable takeoff weight of the airport and airworthiness requirements;

[0006] W 结构，适航 -the maximum weight of the transport aircraft taking off at a certain airport according to airworthiness requirements;

[0007] W 结构，机场 -the maximum weight of the transport aircraft taking off at a certain airport without considering airworthiness requirements;

[0008] W 任务需求 -the takeoff weight required by the transport mission of the transport aircraft.

[0009] The result of the takeoff weight of the transport aircraft is determined by three parts of constraints, i.e., transport aircraft parameters, airport conditions and airworthiness requirements. The transport aircraft parameters include engine thrust, lift characteristics, structural support, etc., and the transport aircraft parameters determine the maximum takeoff weight W 结构 of the transport aircraft. The airport conditions include environmental conditions, runway length, clearance conditions, obstacle information, etc., and the airport conditions determine the allowable takeoff weight W 机场 of the airport, and one engine failure is not considered in the calculation process. The airworthiness requirements fully consider the influence of one engine failure on various aspects of the transport aircraft, and the airworthiness requirements determine the airworthiness allowable takeoff weight W 适航 . Obviously, W 机场 ≥W 适航 .

[0010] The maximum weight W 结构，适航 of the transport aircraft taking off at a certain airport according to airworthiness requirements is:

[0011] W 结构，适航 =min{W 结构 , W 适航} (1)

[0012] The maximum weight W of the transport aircraft taking off at an airport without considering airworthiness requirements 结构，机场 is:

[0013] W 结构，机场 = min{W 结构 , W 机场} (2)

[0014] Obviously, W 结构，适航 ≤ W 结构，机场 . In the case of good airport conditions, the two values are close; when the airport conditions are insufficient, the difference between the two is obvious.

[0015] By analyzing the transport task to be performed by the transport aircraft, such as transporting a certain weight load to the target range, the take-off weight W 任务需求 of the task to be performed can be calculated, and it is naturally required that W 结构 ≥ W 任务需求 .

[0016] The conditions of the transport airport where the transport aircraft takes off are studied, and the transport aircraft parameters and airworthiness requirements are substituted to obtain W 结构，适航 and W 结构，机场 . If W 结构，机场 ≥ W 任务需求 > W 结构，适航 , and the transport aircraft takes off at a weight of W 任务需求 , this case is called over-weight take-off.

[0017] The weight W 任务需求 take-off is within the maximum take-off weight range of the transport aircraft, within the allowable take-off weight range of the airport, and the original airworthiness requirements need to be broken through to design the take-off performance under the condition of bearing a certain risk.

[0018] At present, there is a lack of clear and quantitative determination method for the over-weight take-off scene of the transport aircraft. First, the traditional take-off performance design method is based on airworthiness requirements, and the design of airworthiness requirements is based on long-term, large amount and regular air transport. The over-weight take-off scene condition is short-term, small amount and occasional air transport, and the two do not completely match. Secondly, the airworthiness requirements fully consider the influence of one engine failure on each stage of the take-off of the transport aircraft, but the time of each stage of take-off is different, and the probability is naturally different. Under the condition of over-weight take-off, the risk probability should be considered as a whole. Therefore, it is very important to develop a clear and quantitative determination method for the over-weight take-off of the transport aircraft. SUMMARY

[0019] The purpose of the present application is to provide a determination method and system for over-weight take-off of a transport aircraft considering risk time, to solve the problem of lack of clear and quantitative determination method for the over-weight take-off scene of the existing transport aircraft.

[0020] The technical solution of the present application is: a judgment method for over-weight take-off of a transport aircraft considering risk time, comprising:

[0021] determining a transport aircraft research object, a given airport, and a given to-be-executed task of the corresponding transport aircraft;

[0022] after a transport task demand is issued by a task initiating unit according to the to-be-executed task, relevant parameters in the transport task demand are acquired to calculate a take-off weight W 任务需求 of the to-be-executed task; a transport executing unit combines transport aircraft parameters, airport conditions, and airworthiness requirements to calculate a maximum weight W 结构，适航 of the transport aircraft taking off at the airport according to the airworthiness requirements, and judges the size of the take-off weight W 任务需求 and the maximum weight W 结构，适航 ; if W 结构，适航 <W 任务需求 , the relationship between W 结构，机场 and W 任务需求 is further judged; if W 结构，机场 ≥W 任务需求 > W 结构，适航 , and the importance of the to-be-executed task reaches a set level and relevant authorization is accepted, then over-weight take-off of the transport aircraft is performed; W 结构，机场 is a maximum weight of the transport aircraft taking off at a certain airport without considering airworthiness requirements;

[0023] when the transport aircraft performs over-weight take-off, a risk time T 风险 of the take-off process is evaluated according to design parameters of the transport aircraft and the importance of the to-be-executed task; when the take-off is determined to be released according to the risk time T 风险 , the next step is performed;

[0024] whether the take-off weight W 任务需求 can take off and clear obstacles is judged; if yes, the next step is entered;

[0025] whether the take-off weight W 任务需求 can take off and climb is judged; if yes, the next step is entered;

[0026] whether the take-off weight W 任务需求 can take off and slide is judged; if yes, it is determined that the over-weight take-off of the transport aircraft can be released, and the design is ended.

[0027] Preferably, if W 结构，适航 ≥W 任务需求 , a flight task is designed according to W 任务需求 , and the design is ended.

[0028] Preferably, if W 结构，机场 <W 任务需求 , the task cannot be executed, and the design is ended.

[0029] Preferably, based on the risk time T 风险 The specific method for determining whether takeoff can be cleared is as follows: the sum of the time it takes for a single engine failure to cause the transport aircraft to be in danger is called the danger time T. 危险 Risk time T 风险 and dangerous time T 危险 The judgment, if the risk time T 风险 ≥ Dangerous Time T 危险 If the risk of overweight takeoff is deemed manageable, then takeoff can be permitted; if the risk time T... 风险 < Dangerous Time T 危险 If the risk of taking off due to overweight is deemed uncontrollable, then takeoff cannot be permitted.

[0030] Preferably, determine W 任务需求 The specific method for determining whether a takeoff weight allows for obstacle clearance is as follows: Based on the actual obstacle clearance requirements of the airport, first calculate the obstacle clearance time under full-engine conditions, then evaluate the result of a single-engine failure at any point during the takeoff obstacle clearance process. The time during which takeoff and obstacle clearance cannot be achieved is T. 危险，越障 T 危险 =T 危险，越障 ;T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 It can overcome obstacles and move on to the next step.

[0031] Preferably, determine W 任务需求 The specific method for determining whether a certain takeoff weight allows for takeoff and climb is as follows: Based on the actual climb requirements of the airport, first calculate the climb time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff and climb process. The time during which takeoff and climb are not possible is T. 危险，爬升 T 危险 =T 危险，爬升 +T 危险，越障 ;T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 It can climb up and move on to the next step.

[0032] Preferably, determine W 任务需求 The specific method for determining whether a certain takeoff weight is sufficient for takeoff roll is as follows: Based on the actual roll requirements of the airport, first calculate the roll time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff roll. The time during which the transport aircraft's safety cannot be guaranteed is T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

[0033] As one specific implementation, a judgment system for transport aircraft considering risk time overweight takeoff includes a precondition judgment module, a takeoff weight judgment module, a risk time assessment module, a takeoff obstacle clearance judgment module, a takeoff climb judgment module, and a takeoff run judgment module.

[0034] The precondition determination module can determine the research object of the transport aircraft, the given airport, and the corresponding transport aircraft's task to be executed;

[0035] The takeoff weight determination module can calculate the takeoff weight W of the mission to be executed by obtaining relevant parameters from the transportation mission request after the mission initiating unit issues the transportation mission request based on the mission to be executed. 任务需求 The transport operator, taking into account the transport aircraft parameters, airport conditions, and airworthiness requirements, calculates the maximum takeoff weight W of the transport aircraft at that airport in accordance with airworthiness requirements. 结构，适航 Determine the takeoff weight W 任务需求 With maximum weight W 结构，适航 Size of W; 结构，适航 <W 任务需求 Then further determine W 结构，机场 and W 任务需求 Relationship, if W 结构，机场 ≥W 任务需求 >W 结构，适航 If the importance of the mission reaches a set level and relevant authorization is received, then the transport aircraft will be allowed to take off at overweight capacity; W 结构，机场 The maximum weight of a transport aircraft taking off from a particular airport, without considering airworthiness requirements;

[0036] The risk time assessment module can assess the risk time T of the takeoff process when the transport aircraft is taking off with excessive weight, based on the aircraft's design parameters and the importance of the mission to be performed. 风险 When based on risk time T 风险 Once it is determined that takeoff is cleared, proceed to the next step;

[0037] The takeoff obstacle clearance determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and obstacle clearance, proceed to the next step.

[0038] The takeoff and climb determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and climb, proceed to the next step.

[0039] The take-off running determination module can determine whether the take-off weight W 任务需求 of the transport aircraft can take off and run, and if so, determine that the transport aircraft can take off and run with an over-weight, and the design ends.

[0040] Preferably, if W 结构，适航 ≥ W 任务需求 , the flight mission is designed according to W 任务需求 , and the design ends.

[0041] Preferably, if W 结构，机场 < W 任务需求 , the mission cannot be performed, and the design ends.

[0042] Preferably, the specific method for determining whether the take-off can be released according to the risk time T 风险 is that the sum of the time processes in which the transport aircraft is in danger due to one engine failure is referred to as the danger time T 危险 ; the risk time T 风险 and the danger time T 危险 are determined, and if the risk time T 风险 ≥ the danger time T 危险 , it is determined that the risk in the over-weight take-off process is controllable, and it is determined that the take-off can be released; if the risk time T 风险 < the danger time T 危险 , it is determined that the risk in the over-weight take-off process is uncontrollable, and it is determined that the take-off cannot be released.

[0043] Preferably, the specific method for determining whether the take-off weight W 任务需求 can take off and clear the obstacle is that, according to the actual obstacle-clearing requirement of the airport, the obstacle-clearing time under the full-engine condition is first calculated, and then the result of one-engine failure at any time point in the take-off and obstacle-clearing process is evaluated, wherein the time at which the take-off and obstacle-clearing cannot be performed is T 危险，越障 , T 危险 = T 危险，越障 ; if T 危险 > T 风险 , it is determined that the mission cannot be performed, and the design ends; and if T 危险 ≤ T 风险 , the obstacle can be cleared, and the next step is entered.

[0044] Preferably, the specific method for determining whether the take-off weight W 任务需求 can take off and climb is that, according to the actual climb requirement of the airport, the climb time under the full-engine condition is first calculated, and then the result of one-engine failure at any time point in the take-off and climb process is evaluated, wherein the time at which the take-off and climb cannot be performed is T 危险，爬升 , T 危险 = T 危险，爬升 + T 危险，越障 ; if T 危险 > T 风险 , it is determined that the mission cannot be performed, and the design ends.This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 It can climb up and move on to the next step.

[0045] Preferably, determine W 任务需求 The specific method for determining whether a certain takeoff weight is sufficient for takeoff roll is as follows: Based on the actual roll requirements of the airport, first calculate the roll time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff roll. The time during which the transport aircraft's safety cannot be guaranteed is T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

[0046] This application presents a method and system for determining whether a transport aircraft can take off due to exceeding its weight limit during risk periods. By comparing weight and time, and considering the current takeoff scenario conditions, it accurately and quantitatively determines whether takeoff is possible, achieving a stable, long-term, and high-volume air transport determination process. It can also accurately determine whether a transport aircraft can take off under conditions of single-engine failure, based on time constraints, and has a wide range of applications. Attached Figure Description

[0047] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.

[0048] Figure 1 Flowchart for determining the risk of overweight takeoff during the time period considered in this application;

[0049] Figure 2 Flowchart for determining takeoff obstacle clearance based on risk time for this application. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] A method for determining whether a transport aircraft will take off due to exceeding its weight limit while considering risk time, wherein:

[0052] W 结构 —The parameters of a transport aircraft determine its maximum takeoff weight;

[0053] W 机场 —Airport conditions determine the permitted takeoff weight;

[0054] W 适航 —Take into account the takeoff weight allowed by airport conditions and airworthiness requirements;

[0055] W 结构，适航 —The maximum weight at which a transport aircraft can take off from a certain airport in accordance with airworthiness requirements;

[0056] W 结构，机场 —The maximum weight of a transport aircraft taking off from a particular airport, without considering airworthiness requirements;

[0057] W 任务需求 —The takeoff weight required for the transport aircraft's transport mission.

[0058] Includes the following steps:

[0059] Step S100: Determine the research object of the transport aircraft, the given airport, and the corresponding task to be performed by the transport aircraft.

[0060] Preferably, the transport aircraft is a fixed-wing jet transport aircraft.

[0061] Step S200: After issuing a transportation task request based on the task to be executed, the task initiating unit obtains the relevant parameters in the transportation task request to calculate the takeoff weight W of the task to be executed. 任务需求 The transport operator, taking into account the transport aircraft parameters, airport conditions, and airworthiness requirements, calculates the maximum takeoff weight W of the transport aircraft at that airport, in accordance with airworthiness requirements. 结构，适航 Determine the takeoff weight W 任务需求 With maximum weight W 结构，适航 Size.

[0062] The maximum weight W of the transport aircraft taking off from this airport, without considering airworthiness requirements. 结构，机场 .See Figure 1 .

[0063] If W 结构，适航 ≥W 任务需求 This indicates that the transport aircraft's mission capability exceeds or equals the capability of the mission to be performed. According to W... 任务需求 Designing the flight mission is all that's needed; the design is now complete.

[0064] If W 结构，适航 <W 任务需求 This indicates that, considering airworthiness conditions, the transport aircraft's mission capability is lower than the capability of the mission to be performed. Therefore, further judgment is needed regarding W. 结构，机场 and W 任务需求Relationship, if W 结构，机场 <W 任务需求 The task cannot be executed, and the design ends. If W 结构，机场 ≥W 任务需求 >W 结构，适航 If the importance of the mission reaches a set level and relevant authorization is received, then the transport aircraft will be allowed to take off at overweight capacity. The importance level of the mission is determined based on actual needs.

[0065] In step S300, when the transport aircraft is taking off with excessive weight, the risk time T of the takeoff process is assessed based on the transport aircraft's design parameters and the importance of the mission to be performed. 风险 When based on risk time T 风险 Once it is determined that takeoff is cleared, proceed to the next step.

[0066] Risk Time T 风险 This refers to the time during which the transport aircraft cannot be guaranteed safety if one engine fails. Risk Time T 风险 This serves as a quantitative description of the risks incurred by exceeding existing airworthiness requirements.

[0067] Preferably, when an engine failure occurs during overweight takeoff, the transport aircraft may be in a dangerous or safe state. The sum of the time it takes for an engine failure to lead to a dangerous situation for the transport aircraft is called the danger time T. 危险 Risk time T 风险 and dangerous time T 危险 The judgment, if the risk time T 风险 ≥ Dangerous Time T 危险 If the risk of overweight takeoff is deemed manageable, then takeoff can be permitted. If the risk time T... 风险 < Dangerous Time T 危险 If the risk of taking off due to overweight is deemed uncontrollable, then takeoff cannot be permitted.

[0068] Step S400, determine W 任务需求 If the takeoff weight is sufficient for takeoff and obstacle clearance, proceed to the next step.

[0069] Specifically, based on the airport's actual obstacle-clearing requirements, the obstacle-clearing time under full-engine conditions is first calculated. Then, the consequences of a single-engine failure occurring at any point during takeoff obstacle-clearing are evaluated, where the time during which takeoff and obstacle-clearing cannot proceed is T. 危险，越障 T 危险 =T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated. 危险 Not greater than T 风险 This allows you to overcome obstacles and proceed to the next step. See the detailed calculation process below.Figure 2 .

[0070] Step S500, determine W 任务需求 If the takeoff weight is sufficient for takeoff and climb, then proceed to the next step.

[0071] Specifically, based on the airport's actual climb requirements, the climb time under full-engine conditions is first calculated. Then, the consequences of an engine failure at any point during takeoff and climb are evaluated, where the time during which takeoff and climb cannot proceed is T. 危险，爬升 T 危险 =T 危险，爬升 +T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated. 危险 Not greater than T 风险 You can climb up and proceed to the next step.

[0072] Step S600, determine W 任务需求 If the takeoff weight is sufficient for takeoff and taxiing, and if so, the transport aircraft is deemed to be overweight and can be allowed to take off, thus completing the design.

[0073] Specifically, based on the actual taxiing requirements of the airport, the taxiing time under full-engine conditions is first calculated. Then, the consequences of an engine failure at any point during the takeoff taxiing process are evaluated, with the time during which the safety of the transport aircraft cannot be guaranteed being T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated. 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

[0074] Through the above design, by comparing weight and time, and combining the current takeoff scenario conditions, an accurate and quantitative determination of whether takeoff is possible can be made, achieving a stable, long-term, and large-scale air transport determination process. It can also accurately determine whether a transport aircraft can take off under conditions of single-engine failure, based on time constraints, making it widely applicable.

[0075] As one specific implementation, it also includes a judgment system for transport aircraft taking off with excessive weight considering risk time. The system adopts the above design and includes a precondition judgment module, a takeoff weight judgment module, a risk time assessment module, a takeoff obstacle clearance judgment module, a takeoff climb judgment module, and a takeoff run judgment module.

[0076] The precondition determination module can determine the research object of the transport aircraft, the given airport, and the corresponding transport aircraft's task to be executed;

[0077] The takeoff weight determination module can calculate the takeoff weight W of the mission to be executed by obtaining relevant parameters from the transportation mission request after the mission initiating unit issues the transportation mission request based on the mission to be executed. 任务需求 The transport operator, taking into account the transport aircraft parameters, airport conditions, and airworthiness requirements, calculates the maximum takeoff weight W of the transport aircraft at that airport in accordance with airworthiness requirements. 结构，适航 Determine the takeoff weight W 任务需求 With maximum weight W 结构，适航 Size of W; 结构，适航 <W 任务需求 Then further determine W 结构，机场 and W 任务需求 Relationship, if W 结构，机场 ≥W 任务需求 >W 结构，适航 If the importance of the mission reaches a set level and relevant authorization is received, then the transport aircraft will be allowed to take off at overweight capacity; W 结构，机场 The maximum weight of a transport aircraft taking off from a particular airport, without considering airworthiness requirements;

[0078] The risk time assessment module can assess the risk time T of the takeoff process when the transport aircraft is taking off with excessive weight, based on the aircraft's design parameters and the importance of the mission to be performed. 风险 When based on risk time T 风险 Once it is determined that takeoff is cleared, proceed to the next step;

[0079] The takeoff obstacle clearance determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and obstacle clearance, proceed to the next step.

[0080] The takeoff and climb determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and climb, proceed to the next step.

[0081] The takeoff roll determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and taxiing, and if so, the transport aircraft is deemed to be overweight and can be allowed to take off, thus completing the design.

[0082] Preferably, if W 结构，适航 ≥W 任务需求 According to W 任务需求 Designing the flight mission is all that's needed; the design is now complete.

[0083] Preferably, if W 结构，机场 <W 任务需求 The task cannot be executed, and the design is terminated.

[0084] Preferably, based on the risk time T 风险 The specific method for determining whether takeoff can be cleared is as follows: the sum of the time it takes for a single engine failure to cause the transport aircraft to be in danger is called the danger time T. 危险 Risk time T 风险 and dangerous time T 危险 The judgment, if the risk time T 风险 ≥ Dangerous Time T 危险 If the risk of overweight takeoff is deemed manageable, then takeoff can be permitted; if the risk time T... 风险 < Dangerous Time T 危险 If the risk of taking off due to overweight is deemed uncontrollable, then takeoff cannot be permitted.

[0085] Preferably, determine W 任务需求 The specific method for determining whether a takeoff weight allows for obstacle clearance is as follows: Based on the actual obstacle clearance requirements of the airport, first calculate the obstacle clearance time under full-engine conditions, then evaluate the result of a single-engine failure at any point during the takeoff obstacle clearance process. The time during which takeoff and obstacle clearance cannot be achieved is T. 危险，越障 T 危险 =T 危险，越障 ;T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 It can overcome obstacles and move on to the next step.

[0086] Preferably, determine W 任务需求 The specific method for determining whether a certain takeoff weight allows for takeoff and climb is as follows: Based on the actual climb requirements of the airport, first calculate the climb time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff and climb process. The time during which takeoff and climb are not possible is T. 危险，爬升 T 危险 =T 危险，爬升 +T 危险，越障 ;T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 It can climb up and move on to the next step.

[0087] Preferably, determine W 任务需求 The specific method for determining whether a certain takeoff weight is sufficient for takeoff roll is as follows: Based on the actual roll requirements of the airport, first calculate the roll time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff roll. The time during which the transport aircraft's safety cannot be guaranteed is T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

[0088] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0089] In conclusion, 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 within the protection scope of the present invention.

Claims

1. A method for determining whether a transport aircraft will take off due to exceeding its weight limit while considering risk time, characterized in that, include: The research object of the transport aircraft is determined, the airport is given, and the corresponding mission to be performed by the transport aircraft is given; After issuing a transportation mission request based on the mission to be executed, the mission initiating unit obtains the relevant parameters from the transportation mission request to calculate the takeoff weight W of the mission to be executed. 任务需求 The transport operator, taking into account the transport aircraft parameters, airport conditions, and airworthiness requirements, calculates the maximum takeoff weight W of the transport aircraft at that airport in accordance with airworthiness requirements. 结构，适航 Determine the takeoff weight W 任务需求 With maximum weight W 结构，适航 Size of W; 结构，适航 <W 任务需求 Then further determine W 结构，机场 and W 任务需求 Relationship, if W 结构，机场 ≥W 任务需求 >W 结构，适航 If the importance of the mission reaches a set level and relevant authorization is received, then the transport aircraft will be allowed to take off at overweight capacity; W 结构，机场 The maximum weight of a transport aircraft taking off from a particular airport, without considering airworthiness requirements; When a transport aircraft takes off with excessive weight, the risk time T of the takeoff process is assessed based on the aircraft's design parameters and the importance of the mission. 风险 When based on risk time T 风险 Once it is determined that takeoff is cleared, proceed to the next step; Determine W 任务需求 If the takeoff weight is sufficient for takeoff and obstacle clearance, proceed to the next step. Determine W 任务需求 If the takeoff weight is sufficient for takeoff and climb, proceed to the next step. Determine W 任务需求 If the takeoff weight is sufficient for takeoff and taxiing, and if so, the transport aircraft is deemed to be overweight and can be allowed to take off, thus completing the design process. Based on risk time T 风险 The specific method for determining whether takeoff can be cleared is as follows: the sum of the time it takes for a single engine failure to cause the transport aircraft to be in danger is called the danger time T. 危险 Risk time T 风险 and dangerous time T 危险 The judgment, if the risk time T 风险 ≥ Dangerous Time T 危险 If the risk of overweight takeoff is deemed manageable, then takeoff can be permitted; if the risk time T... 风险 < Dangerous Time T 危 If the risk is deemed uncontrollable during takeoff due to excessive weight, then takeoff cannot be permitted.

2. The method for determining whether a transport aircraft can take off due to exceeding its weight limit while considering risk time, as described in claim 1, is characterized in that... If W 结构，适航 ≥W 任务需求 According to W 任务需求 Designing the flight mission is all that's needed; the design is now complete.

3. The method for determining whether a transport aircraft can take off due to exceeding its weight limit while considering risk time, as described in claim 1, is characterized in that... If W 结构，机场 <W 任务需求 The task cannot be executed, and the design is terminated.

4. The method for determining whether a transport aircraft can take off due to exceeding its weight limit while considering risk time, as described in claim 1, is characterized in that... Determine W 任务需求 The specific method for determining whether a takeoff weight allows for obstacle clearance is as follows: Based on the actual obstacle clearance requirements of the airport, first calculate the obstacle clearance time under full-engine conditions, then evaluate the result of a single-engine failure at any point during the takeoff obstacle clearance process. The time during which takeoff and obstacle clearance cannot be achieved is T. 危险， Obstacle crossing, Tdanger = Tdanger ， Obstacle crossing; if the danger (Thazard) is greater than the risk (Trisk), the task cannot be performed, and the design ends; if the danger (Thazard) is not greater than the risk (Trisk), the task cannot be performed. 风险 It can overcome obstacles and move on to the next step.

5. The method for determining whether a transport aircraft will take off due to overweight during a time of risk, as described in claim 1, is characterized in that... Determine W 任务需求 The specific method for determining whether a certain takeoff weight allows for takeoff and climb is as follows: Based on the actual climb requirements of the airport, first calculate the climb time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff and climb process. The time during which takeoff and climb are not possible is T. 危险， Climbing, T danger = T danger ， Climb + T Danger ， Obstacle crossing; if the danger (Tdanger) is greater than the risk (Trisk), the task cannot be performed, and the design ends; T 危险 Not greater than T 风险 It can climb up and move on to the next step.

6. The method for determining whether a transport aircraft will take off due to exceeding its weight limit while considering risk time, as described in claim 1, is characterized in that... Determine W 任务需求 The specific method for determining whether a certain takeoff weight is sufficient for takeoff roll is as follows: Based on the actual roll requirements of the airport, first calculate the roll time under full-engine conditions, then assess the consequences of an engine failure at any point during the takeoff roll, where the time at which the transport aircraft's safety cannot be guaranteed is T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

7. A system for determining whether a transport aircraft will take off due to overweight during a time period considering risk, employing the determination method as described in any one of claims 1-6, characterized in that, It includes a precondition determination module, a takeoff weight determination module, a risk time assessment module, a takeoff obstacle clearance determination module, a takeoff climb determination module, and a takeoff run determination module; The precondition determination module can determine the research object of the transport aircraft, the given airport, and the corresponding transport aircraft's task to be executed; The takeoff weight determination module can calculate the takeoff weight W of the mission to be executed by obtaining relevant parameters from the transportation mission request after the mission initiating unit issues the transportation mission request based on the mission to be executed. 任 Service requirements; the transport operator, taking into account aircraft parameters, airport conditions, and airworthiness requirements, calculates the maximum takeoff weight W of the transport aircraft at that airport in accordance with airworthiness requirements. 结构，适航 Determine the takeoff weight W 任务需求 With maximum weight W 结构，适航 Size of W; 结构，适航 <W 任务需求 Then further determine W 结构，机场 and W 任务需求 Relationship, if W 结构，机场 ≥W 任务需求 >W 结构，适航 If the importance of the mission reaches a set level and relevant authorization is received, then the transport aircraft will be allowed to take off at overweight capacity; W 结构，机场 The maximum weight of a transport aircraft taking off from a particular airport, without considering airworthiness requirements; The risk time assessment module can assess the risk time T of the takeoff process when the transport aircraft is taking off with excessive weight, based on the aircraft's design parameters and the importance of the mission to be performed. 风险 When based on risk time T 风险 Once it is determined that takeoff is cleared, proceed to the next step; The takeoff obstacle clearance determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and obstacle clearance, proceed to the next step. The takeoff and climb determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and climb, proceed to the next step. The takeoff roll determination module can determine W 任务需求 If the takeoff weight is sufficient for takeoff and taxiing, and if so, the transport aircraft is deemed to be overweight and can be allowed to take off, thus completing the design.

8. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... If W 结构，适航 ≥W 任务需求 According to W 任务需求 Designing the flight mission is all that's needed; the design is now complete.

9. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... If W 结构，机场 <W 任务需求 The task cannot be executed, and the design is terminated.

10. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... Based on risk time T 风险 The specific method for determining whether takeoff can be cleared is as follows: the sum of the time it takes for a single engine failure to cause the transport aircraft to be in danger is called the danger time T. 危险 Risk time T 风险 and dangerous time T 危险 The judgment, if the risk time T 风险 ≥ Dangerous Time T 危险 If the risk of overweight takeoff is deemed manageable, then takeoff can be permitted; if the risk time T... 风险 < Dangerous Time T 危险 If the risk of taking off due to overweight is deemed uncontrollable, then takeoff cannot be permitted.

11. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... Determine W 任务需求 The specific method for determining whether a takeoff weight allows for obstacle clearance is as follows: Based on the actual obstacle clearance requirements of the airport, first calculate the obstacle clearance time under full-engine conditions, then evaluate the result of a single-engine failure at any point during the takeoff obstacle clearance process. The time during which takeoff and obstacle clearance cannot be achieved is T. 危险， Obstacle crossing, Tdanger = Tdanger ， Obstacle crossing; if the danger (Thazard) is greater than the risk (Trisk), the task cannot be performed, and the design ends; if the danger (Thazard) is not greater than the risk (Trisk), the task cannot be performed. 风险 It can overcome obstacles and move on to the next step.

12. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... Determine W 任务需求 The specific method for determining whether a certain takeoff weight allows for takeoff and climb is as follows: Based on the actual climb requirements of the airport, first calculate the climb time under full-engine conditions, then evaluate the consequences of an engine failure at any point during the takeoff and climb process. The time during which takeoff and climb are not possible is T. 危险， Climbing, T danger = T danger ， Climb + T Danger ， Obstacle crossing; if the danger (Tdanger) is greater than the risk (Trisk), the task cannot be performed, and the design ends; T 危险 Not greater than T 风险 It can climb up and move on to the next step.

13. The system for determining whether a transport aircraft can take off due to overweight during a time of risk, as described in claim 7, is characterized in that... Determine W 任务需求 The specific method for determining whether a certain takeoff weight is sufficient for takeoff roll is as follows: Based on the actual roll requirements of the airport, first calculate the roll time under full-engine conditions, then assess the consequences of an engine failure at any point during the takeoff roll, where the time at which the transport aircraft's safety cannot be guaranteed is T. 危险，滑跑 T 危险 =T 危险，滑跑 +T 危险，爬升 +T 危险，越障 T 危险 Greater than T 风险 This indicates that the task cannot be executed, and the design is terminated; T 危险 Not greater than T 风险 The aircraft can take off after a taxiing test, and the design is complete once it is determined that the transport aircraft is overweight and can be released for takeoff.

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