A refined method for analyzing the electrical energy demand of aircraft

Abstract

This application belongs to the field of aircraft overall design, and particularly relates to a refined aircraft electrical energy demand analysis method. It includes: Step 1, conduct an operating scenario analysis to obtain a mission profile; Step 2, obtain the electrical equipment corresponding to the mission profile and determine the electrical energy demand attributes of the electrical equipment; Step 3, analyze the electrical energy demand of the electrical equipment according to the mission profile and / or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand; Step 4, generate an electrical energy demand analysis matrix and a bar chart according to the analysis result of the electrical energy demand. The refined aircraft electrical energy demand analysis method of this application, through detailed design and analysis of the operating scenario, obtains the actual electrical energy demand of the electrical equipment under the corresponding mission profile, refinedly analyzes the electrical energy demand of the whole aircraft, and reduces the burden on the aircraft and the life cycle usage cost.

Description

Technical Field

[0001] This application belongs to the field of aircraft overall design, and particularly relates to a refined aircraft electrical energy demand analysis method. Background Art

[0002] Since powered flight began, electrical energy has played a crucial role in aircraft and is the energy guarantee for the realization of most of the aircraft's functional performances. For traditional aircraft, the electrical loads on board are few and the power supply capacity is relatively abundant, so the contradiction between supply and demand has not been exposed. Therefore, for a long time in China, the analysis of on-board electrical energy demand has mostly used the simple and crude method of "peak superposition".

[0003] With the increasing functional requirements and performance requirements of modern aircraft, the demand for electrical energy is increasing day by day, and the contradiction between electrical energy supply and demand has become more prominent. The simple and "extensive" electrical energy demand analysis method of traditional aircraft, which is the simple maximum summation, can no longer meet the requirements. This analysis method with a large amount of "moisture" brings additional costs to the aircraft, including space occupation, weight increase, increased internal heat load of the aircraft, and increased life cycle cost, etc., which are unbearable for current fourth-generation aircraft, future fifth-generation aircraft, space planes, armed helicopters, and multi-purpose unmanned aircraft, etc.

[0004] Therefore, it is hoped that there is a technical solution to overcome or at least alleviate at least one of the above defects of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a refined aircraft electrical energy demand analysis method to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is as follows:

[0007] A refined aircraft electrical energy demand analysis method includes:

[0008] Step 1, conduct an operating scenario analysis to obtain a mission profile;

[0009] Step 2, obtain the electrical equipment corresponding to the mission profile and determine the electrical energy demand attributes of the electrical equipment;

[0010] Step 3, analyze the electrical energy demand of the electrical equipment according to the mission profile and / or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand;

[0011] Step 4, generate an electrical energy demand analysis matrix and a bar chart according to the analysis result of the electrical energy demand.

[0012] In at least one embodiment of the present application, in step one, the mission profile includes: ground / shipboard maintenance, aircraft maintenance preparation, engine start, ground / shipboard warm-up, afterburner takeoff, retraction of landing gear in afterburner, afterburner acceleration climb, constant-speed climb, afterburner supersonic penetration, afterburner missile launch, afterburner dogfight, dogfight, afterburner supersonic, low-altitude penetration, cruise return, glide 1, glide 2, landing / approach path, lowering of landing gear and arrestor hook during landing, go-around after touchdown, emergency situation.

[0013] In at least one embodiment of the present application, in step two, the power demand attributes of the electrical equipment include the system to which the electrical equipment belongs, voltage characteristics, current characteristics, load type, installation location, power supply equipment type, number of single units, redundant power supply characteristics, power supply time characteristics.

[0014] In at least one embodiment of the present application, the power supply equipment type includes generators, storage batteries, and emergency power supplies.

[0015] In at least one embodiment of the present application, in step three, analyzing the power demand of the electrical equipment according to the mission profile and / or the power demand attributes to obtain the analysis result of the power demand includes:

[0016] Performing multi-dimensional analysis on the power demand of the electrical equipment according to the mission profile and the power demand attributes to obtain the multi-dimensional analysis result of the power demand;

[0017] Analyzing the power demand of the electrical equipment according to the mission profile or the power demand attributes to obtain the analysis result of the power demand.

[0018] In at least one embodiment of the present application, performing multi-dimensional analysis on the power demand of the electrical equipment according to the mission profile and the power demand attributes to obtain the multi-dimensional analysis result of the power demand includes:

[0019] Analyzing the power demand of the electrical equipment according to the mission profile and the power supply time characteristics of the electrical equipment to obtain the first power demand;

[0020] Analyzing the power demand of the electrical equipment according to the mission profile and the system to which the electrical equipment belongs to obtain the second power demand;

[0021] Analyzing the power demand of the electrical equipment according to the mission profile and the current characteristics of the electrical equipment to obtain the third power demand.

[0022] In at least one embodiment of the present application, analyzing the power demand of the electrical equipment according to the mission profile or the power demand attributes to obtain the analysis result of the power demand includes:

[0023] Analyze the power demand of electrical equipment according to the ground / shipboard maintenance task profile to obtain the fourth power demand;

[0024] Analyze the power demand of electrical equipment according to the emergency situation task profile to obtain the fifth power demand;

[0025] Analyze the power demand of electrical equipment according to the power supply equipment type to obtain the sixth power demand.

[0026] The invention has at least the following beneficial technical effects:

[0027] The refined aircraft power demand analysis method of the present application obtains the actual power demand of electrical equipment under the corresponding task profile through detailed design and analysis of the operation scenario, and refinedly analyzes the power demand of the whole aircraft, reducing the burden on the aircraft and the life cycle usage cost. Brief Description of the Drawings

[0028] Figure 1 is a flowchart of the refined aircraft power demand analysis method according to an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the power demand analysis matrix according to an embodiment of the present application;

[0030] Figure 3 is a bar chart of the power demand analysis according to an embodiment of the present application;

[0031] Figure 4 is a bar chart of the power demand analysis according to the second embodiment of the present application;

[0032] Figure 5 is a bar chart of the power demand analysis according to the third embodiment of the present application. Detailed Embodiments

[0033] To make the purpose, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of this application.

[0035] The following will further elaborate on this application in conjunction with the attached Figures 1 to 5 drawings.

[0036] This application provides a refined aircraft electrical energy demand analysis method, including the following steps:

[0037] S100. Conduct an operating scenario analysis to obtain a mission profile;

[0038] S200. Obtain the electrical equipment corresponding to the mission profile and determine the electrical energy demand attributes of the electrical equipment;

[0039] S300. Analyze the electrical energy demand of the electrical equipment based on the mission profile and / or electrical energy demand attributes to obtain the analysis result of the electrical energy demand;

[0040] S400. Generate an electrical energy demand analysis matrix and a bar chart based on the analysis result of the electrical energy demand.

[0041] For the refined aircraft electrical energy demand analysis method of this application, an operating scenario analysis is first conducted to obtain a mission profile. In an embodiment of this application, a comprehensive combat mission profile that meets performance assessment is formulated according to all typical combat mission profiles and in combination with the actual usage conditions of the aircraft. See Table 1.

[0042] Table 1

[0043]

[0044]

[0045] For the refined aircraft electrical energy demand analysis method of the present application, in S200, electrical equipment corresponding to the mission profile is obtained, and the electrical energy demand attributes of the electrical equipment are determined. By determining the electrical energy demand attributes, associated elements are provided for subsequent multi-dimensional analysis. In an embodiment of the present application, the electrical energy demand attributes of the electrical equipment include the system to which the electrical equipment belongs, voltage characteristics, current characteristics, load type, installation location, power supply equipment type, single unit quantity, redundant power supply characteristics, and power supply time characteristics. Among them, the current characteristics can be divided into low-power consumption current and high-power consumption current; the load type can be divided into critical and general; the power supply equipment type can be divided into generators, batteries, and support power supplies. Among them, generators are used to supply power for the normal flight of the aircraft, batteries are used to supply power for the emergency of the aircraft and ground / shipboard maintenance, and support power supplies are used to supply power for the ground / shipboard maintenance of the aircraft; the power supply time characteristics can be divided into uninterrupted power supply (continuous power supply) and short-time power supply. Advantageously, in this embodiment, a simple function description and failure impact analysis of the electrical equipment are also performed.

[0046] For the refined aircraft electrical energy demand analysis method of the present application, in S300, the electrical energy demand of the electrical equipment is analyzed according to the mission profile and / or the electrical energy demand attributes, and the analysis results of the electrical energy demand obtained include:

[0047] The electrical energy demand of the electrical equipment is analyzed multi-dimensionally according to the mission profile and the electrical energy demand attributes, and the multi-dimensional analysis results of the electrical energy demand are obtained;

[0048] The electrical energy demand of the electrical equipment is analyzed according to the mission profile or the electrical energy demand attributes, and the analysis results of the electrical energy demand are obtained.

[0049] In the preferred implementation of the present application, in the analysis of the electrical energy demand of the electrical equipment, electrical equipment with a current less than 0.05 A is not considered temporarily; when calculating and analyzing the electrical demand during the emergency situation (double engine shutdown) stage, only critical loads are considered; based on the function and failure impact analysis of the electrical equipment, the confirmation work of the load type, power supply equipment type, redundant power supply characteristics, and power supply time characteristics of the electrical equipment is completed; based on training and combat, the confirmation analysis work of the mission profile, the equipment usage time in this stage, and the electrical demand of the electrical equipment is completed. In this embodiment, an electrical energy demand analysis matrix is generated according to the analysis results of the electrical energy demand as Figure 2 shown. The abscissa of the analysis matrix is the associated elements and different stages / scenarios, and the ordinate is the aircraft state and the electrical equipment.

[0050] In the preferred embodiment of the present application, the multi-dimensional analysis of the electrical energy demand of the electrical equipment according to the mission profile and the electrical energy demand attributes, and the multi-dimensional analysis results of the electrical energy demand that can be obtained include:

[0051] Analyze the power demand of the electrical equipment according to the mission profile and the power supply time characteristics of the electrical equipment to obtain the first power demand;

[0052] For the bar chart generated based on the analysis result of the first power demand, see Figure 3 , and the power supply time characteristics include two states: continuous and short-term;

[0053] Analyze the power demand of the electrical equipment according to the mission profile and the system to which the electrical equipment belongs to obtain the second power demand;

[0054] For the bar chart generated based on the analysis result of the second power demand, see Figure 4 ;

[0055] Analyze the power demand of the electrical equipment according to the mission profile and the current characteristics of the electrical equipment to obtain the third power demand;

[0056] For the bar chart generated based on the analysis result of the third power demand, see Figure 5 .

[0057] In the preferred embodiment of the present application, when analyzing the power demand of the electrical equipment according to the mission profile or the power demand attribute, the analysis result of the power demand may include:

[0058] Analyze the power demand of the electrical equipment according to the ground / shipboard maintenance mission profile to obtain the fourth power demand;

[0059] Analyze the power demand of the electrical equipment according to the emergency mission profile to obtain the fifth power demand;

[0060] Analyze the power demand of the electrical equipment according to the power supply equipment type to obtain the sixth power demand.

[0061] Among them, analyzing the power demand of the ground / shipboard maintenance mission profile alone includes the name of the electrical load, the working current, and the duration, which is convenient for coordinating and docking with the ground / shipboard maintenance resources; analyzing the power demand of the air emergency state alone includes the name of the electrical load, the working current, and the duration, which is convenient for the power supply professional to evaluate the battery capacity; analyzing the power demand of the ground battery power supply state alone includes the name of the electrical load, the working current, and the duration, which is convenient for the power supply professional to evaluate the battery capacity. Due to the high uncertainty of the ground / shipboard maintenance state, currently, the analysis is carried out by multiplying the power demand of all computer equipment working simultaneously by an empirical coefficient.

[0062] The refined aircraft power demand analysis method of the present application analyzes the power demands of electrical equipment not limited to the above-mentioned manner. It can also generate various types of bar charts based on the analysis results of each power demand, such as the bar chart of the continuous / short-term power demand analysis of the whole aircraft; the bar chart of the continuous power demand analysis of each system; the bar chart of the short-term power demand analysis of each system; the bar chart of the continuous / short-term power demand analysis of different power supply types; the bar chart of the continuous / short-term power demand analysis of each system of different power supply types; the bar chart of the continuous / short-term power demand analysis of each system in the emergency state; the bar chart of the power demand analysis of the ground battery; the bar chart of the power demand analysis of each system in the ground / shipboard maintenance state, etc.

[0063] The refined aircraft power demand analysis method of the present application conducts refined design of the aircraft power demand in combination with the actual operating conditions of the aircraft. It adopts the demand analysis method based on the typical combat mission profile, covering 22 typical usage stages / scenarios such as aircraft ground / shipboard maintenance, maintenance preparation, takeoff, climb, cruise, combat, glide, landing / landing on the ship route, etc. By conducting detailed design and analysis on each stage / scenario, the actual power demands of the electrical equipment in the corresponding stage / scenario are sorted out. Finally, the sum of each stage / scenario is calculated to obtain the actual maximum power demand of the aircraft and the power demands of each stage in the typical combat mission profile, and the power demand of the whole aircraft is refinedly analyzed, providing a "moisture-free" power demand for the on-board power system, reducing the aircraft burden and the life cycle usage cost.

[0064] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A refined aircraft electrical energy demand analysis method, characterized in that, it includes: Step 1, conduct an operating scenario analysis to obtain a mission profile; Step 2, obtain the electrical equipment corresponding to the mission profile and determine the electrical energy demand attributes of the electrical equipment; Step 3, analyze the electrical energy demand of the electrical equipment according to the mission profile and / or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand; Step 4, generate an electrical energy demand analysis matrix and a bar chart according to the analysis result of the electrical energy demand; In Step 1, the mission profile includes: ground / shipboard maintenance, aircraft maintenance preparation, engine start, ground / shipboard warm-up, afterburner takeoff, afterburner retraction of landing gear, afterburner acceleration climb, constant-speed climb, afterburner supersonic penetration, afterburner missile launch, afterburner dogfight, dogfight, afterburner supersonic, low-altitude penetration, cruise return, glide 1, glide 2, landing / landing approach, landing gear extension and arrester hook deployment, touchdown and go, emergency situation; In Step 2, the electrical energy demand attributes of the electrical equipment include the system to which the electrical equipment belongs, voltage characteristics, current characteristics, load type, installation location, power supply equipment type, single-unit quantity, redundant power supply characteristics, power supply time characteristics; In Step 3, the analysis of the electrical energy demand of the electrical equipment according to the mission profile and / or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand includes: Conduct a multi-dimensional analysis of the electrical energy demand of the electrical equipment according to the mission profile and the electrical energy demand attributes to obtain a multi-dimensional analysis result of the electrical energy demand; Analyze the electrical energy demand of the electrical equipment according to the mission profile or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand; The multi-dimensional analysis of the electrical energy demand of the electrical equipment according to the mission profile and the electrical energy demand attributes to obtain the multi-dimensional analysis result of the electrical energy demand includes: Analyze the electrical energy demand of the electrical equipment according to the mission profile and the power supply time characteristics of the electrical equipment to obtain the first electrical energy demand; Analyze the electrical energy demand of the electrical equipment according to the mission profile and the system to which the electrical equipment belongs to obtain the second electrical energy demand; Analyze the electrical energy demand of the electrical equipment according to the mission profile and the current characteristics of the electrical equipment to obtain the third electrical energy demand; The analysis of the electrical energy demand of the electrical equipment according to the mission profile or the electrical energy demand attributes to obtain the analysis result of the electrical energy demand includes: Analyze the electrical energy demand of the electrical equipment according to the ground / shipboard maintenance mission profile to obtain the fourth electrical energy demand; Analyze the electrical energy demand of the electrical equipment according to the emergency situation mission profile to obtain the fifth electrical energy demand; Analyze the electrical energy demand of the electrical equipment according to the power supply equipment type to obtain the sixth electrical energy demand.

2. The refined aircraft electrical energy demand analysis method according to claim 1, characterized in that, the power supply equipment type includes generators, batteries, and support power supplies.

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