Announcement on the release of the 2024 project guide for the major research plan on the scientific basis and control mechanism of efficient multi-physics flight
Scientific foundation and control mechanism of efficient multi-physics flight
Major Research Plan 2024 Project Guide
The major research plan “Scientific Foundation and Control Mechanism of Efficient Flight in Multiphysics” is oriented to the country’s major needs for high-speed civil aviation and air-to-air transportation around the world in about one hour, and focuses on major basic issues of efficient flight in multiphysics (multiphysics refers to cross-domain transportation). During the flight of an allosteric high-speed aircraft, the friction between the surface and the air produces a high-temperature field with a gas ambient temperature >3000K, an unsteady time-varying aerodynamic field with a non-steady state of the aircraft configuration and surface gas-solid interface, and a pressure peak of ≥7.5kPa, and cross-domain high-speed Flight creates a complex electromagnetic environment with a plasma electron density of 10 16 -10 20 m -3 ). Focusing on the overall image of the two-stage orbit (both the first- and second-stage aircraft can deform to present an approximate rocket configuration and an approximate aircraft configuration), establish a highly efficient intelligent aircraft design theory and method that spans a large airspace, a wide speed domain, and is repeatable to achieve Core basic theories and technological breakthroughs such as continuous changes in aircraft configuration, active flow control and intelligent control provide theoretical foundations and technical support for the innovative development of aerospace transportation systems.
1. Scientific objectives
Aiming at the major national needs of China’s space transportation system, we propose new ideas for cross-domain efficient intelligent flight, establish unsteady aerodynamic models for the key characteristics of cross-domain, allosteric, and repeatable flight, and develop multi-physical parameter real-time perception and intelligent control theory. Break through key technologies such as active thermal protection, variable configuration mechanism-structural design, active flow control, electromagnetic thermal environment simulation and scientific experiments, and achieve a number of original results of efficient multi-physics flight, driving deep integration and innovative development of disciplines, and innovating The intelligent system engineering paradigm for aerospace giant systems provides key theories, methods, technologies and talent pools for my country’s future space transportation system, and promotes the smooth implementation of China’s space transportation system development plan.
2. Core scientific issues
This major research plan focuses on the following three core scientific issues:
(1) Multi-physics coupling mechanism of variable configuration materials and mechanisms.
Reveal the mechanisms of thermal protection, deformation mechanisms and structures, and rigid-flexible coupling of flexible materials and deformation mechanisms under complex constraints, and establish new methods for structural health monitoring, durability and damage tolerance evaluation to meet the ultimate demand for aircraft allosteric materials and mechanisms. .
(2) Cross-domain unsteady flow model and control mechanism.
Study the interaction mechanism between aircraft flow and flight deformation under complex time-varying boundary conditions, and develop active flow control methods to achieve accurate prediction of aerodynamic characteristics and efficient heat and drag reduction.
(3) Integrated intelligent control of allostery and flight.
Reveal the coupling control mechanism of flight dynamics in a highly uncertain environment, break through key technologies such as cross-domain seamless autonomous navigation and environment-task self-matching online autonomous planning and decision-making, and build an integrated intelligent control method for variable configurations and aircraft.
3. Research directions funded in 2024
(1) Cultivation projects.
Focusing on the above scientific issues and driven by the overall scientific goal, it is planned to fund a number of cultivation projects with strong exploratory nature, novel topic selection and good preliminary research foundation. The research directions are as follows (application projects must cover some of the following single directions or all content):
1. Multi-physics coupling mechanism of metamorphic materials and mechanisms.
Explore new concepts and new methods of efficient active cooling, develop cross-domain allosteric aircraft flexible heat-proof skins, stretchable super-hydrophilic passive surface temperature-heat flow multi-parameter self-sensing mechanisms and methods; study complex ionized component pairs in the transition zone between heaven and earth Damage mechanism of cross-domain aircraft materials, as well as corresponding protection means and simulation methods; research on new concepts of large-scale deformation structures and their distributed smart flexible drive and transmission methods; development of programmable mechanical superstructure for lightweight cross-domain high-speed aircraft load-bearing structures Structural reverse design method.
2. Unsteady aerodynamic theory of cross-domain allosteric flight and active flow control method.
Research the theory and method of stability analysis of cross-basin high-speed boundary layer flow under the influence of rarefaction, high temperature and complex material interface; study the continuous allosteric fluid-solid-thermal multi-physics coupling mechanism and calculation method under extreme high temperature and complex mechanical load environment; develop A new method for active flow control of force/heat under high-speed and high-heat flow conditions.
3. Information perception and intelligent flight control of cross-domain allosteric repeatable aircraft.
Develop a new strain sensing method for cross-domain aircraft with fast response and strong immunity to interference; explore a new method for efficient control of electromagnetic environment parameters in high-enthalpy plasma; develop aerodynamic/elastic coupling measurement and three-dimensional inversion reconstruction during the rigid-flexible deformation process under hypersonic inflow Methods: Research the theory and method of cross-domain strong adaptive allosteric flight intelligent control with online reconstruction and self-evolution capabilities.
4. Cross-domain allosteric aircraft intelligent system engineering theory and methods.
Explore the knowledge resource graph expansion theory and application method driven by multiple cross-domain allosteric aircraft data and models; develop data-driven generative models and methods for the aerodynamic shape of cross-domain allosteric aircraft.
(2) Key support projects.
Focusing on core scientific issues and guided by the overall scientific goal, in 2024 it is planned to fund application projects that have accumulated good early research results, are at the forefront of current research hotspots, and have made a greater contribution to the overall scientific goal. The research directions are as follows:
1. Multi-dimensional deformation precursor structure design theory and continuous smooth deformation mechanism of cross-domain aircraft.
To meet the demand for changing aerodynamic shapes of cross-domain aircraft in complex mechanical and thermal environments, study the theory and methods of multi-dimensional deformation precursor structure design, reveal the continuous smooth deformation of the precursor structure and its dimensional load-bearing mechanism under extreme mechanical and thermal load conditions, and break through the precursor mechanism. Deformation control and rigid-flexibility control technology enables multi-dimensional, continuous and smooth deformation of the cross-domain aircraft precursor structure (no less than 3 deformation forms) and highly stable load-bearing (large-area heat flow is no less than 200kW/m 2 and surface load is no less than 200kW/m 2 ) . Less than 40kPa, aerodynamic shape accuracy error better than 5%), and develop and verify typical prototypes.
2. Integrated aerodynamics/control design method for cross-domain allosteric aircraft based on flow field structure control.
Introduce deep learning, reinforcement learning and other technologies to study the dynamic evolution mechanism of the flow field structure of cross-domain allomorphic aircraft in different speed domains and allomorphic stages and its influence on aerodynamic, aerodynamic thermal and dynamic characteristics, and explore the use of profiles Methods for organizing and regulating the flow field structure through optimization, deformation, or flow control measures, establishing flow field structure identification, quantitative characterization, and evaluation criteria, constructing a correlation model between flow field structure and aerodynamics/stability/control, and developing flow field-oriented The intelligent optimization method of structural control builds a flow field structure that is most beneficial to aerodynamic efficiency, flight control, and allomorphic execution in each configuration and configuration process, and improves the overall performance of the aircraft more effectively, comprehensively, and robustly. Compared with traditional optimization methods, the lift, drag and handling stability characteristics of key design points, the comprehensive optimization capability of multiple design points, and design robustness are significantly improved. On the premise of ensuring that thermal protection constraints are met, the lift, drag and handling stability of key design points are significantly improved. Characteristics are significantly improved, trim rudder deflection and variant drive hinge torque are significantly reduced.
3. Cross-domain natural light field tight combination navigation modeling method and motion information estimation theory.
Focusing on the sensing mechanism of natural light fields such as sunlight/polarized light/starlight and the needs of deep coupling modeling under cross-domain (5-25Ma speed domain, 0-100km airspace) conditions, reveal the evolution rules and adaptation of high-altitude natural light field information and navigation information Invert the mechanism, analyze the physical sources, dynamic characteristics and transmission mechanisms of multi-source interferences such as aerodynamic light and heat, flight vibration, study the cross-domain bionic sensing mechanism and the fine characterization of multi-source non-Gaussian interference, and the combination of aerodynamic light/heat and other composite interferences Theoretical methods such as navigation information estimation, seamless navigation of multi-scale optical information such as sunlight/polarized light/starlight, etc., breakthroughs in key technologies such as multi-source heterogeneous composite error iterative calibration of bionic polarization navigation sensors, bionic multi-sensor tight combination navigation modeling, etc., to establish Polarized light field model database in cross-domain environments, and developed integrated navigation information estimation software for aerodynamic light/heat and other composite interferences, to realize unpolarized direct light interference, polarized light tailing error, and polarization refractive index gradient interference under cross-domain high dynamic conditions Identification and estimation of heterogeneous interference from multiple sources to improve the environmental adaptability and spatial adaptability of natural light field navigation under cross-domain flight conditions.
4. Cross-domain intelligent allosteric and efficient flight control theories and methods.
In view of the future aerospace transportation system requirements for multi-functionality of one aircraft and optimal energy consumption during cross-domain (0-25Ma speed domain, 0-100km airspace) allosteric flight, the aerodynamic configuration/flight caused by cross-domain and allosteric flight is considered Mission/attitude and orbit control are strongly coupled, carry out research on allosteric and flight control theories and methods, establish a wide-domain envelope variable configuration dynamics modeling theory for flight control design, and characterize the global coupled dynamics of cross-domain flow field structural changes. Features; solve intelligent configuration/mission decision-making problems for typical cross-domain flight mission scenarios, and achieve comprehensive performance index optimization of force/heat/control; design a full-range real-time mission/trajectory planning method that adapts to wide-domain envelopes and time-varying configurations , efficiently cope with multi-physics flight environments and diverse tasks; study trajectory/attitude control theory and methods to suppress multi-source interference caused by allosteric flight, and meet the attitude and orbit flight quality index requirements of cross-domain aircraft.
5. Research on the distributed strain dynamic sensing method and friction independent inversion model of cross-domain allosteric aircraft.
In view of the real-time online dynamic sensing requirements of multi-physical parameters of cross-domain (0-25Ma speed domain, 0-100km airspace) allosteric aircraft in complex environments, the rapid sensing mechanism of complex curved surface strain and the decoupling theory of distributed strain signals are studied to explore the Friction coefficient inversion model of distributed strain information during cross-domain autonomous flight, establishing real-time monitoring of aircraft environmental information and surface resistance measurement methods, breaking through flexible high-temperature resistant film strain sensing (serviceable for more than 24 hours at 1500°C) and arrays Based on the intelligent skin strain dynamic sensing function integration technology, a flexible high-temperature strain dynamic information sensing prototype adapted to the cross-domain flight environment was developed, and ground tests and evaluations were carried out on a typical flat plate structure.
6. Cross-domain allosteric aircraft intelligent system engineering framework and evolution optimization method.
Facing the problem that the traditional V-shaped overall design paradigm is difficult to adapt to the overall design of strongly time-varying cross-domain aircraft, with the goal of comprehensive optimization of core capabilities, we carry out research on the overall framework design of complex aircraft system engineering empowered by intelligent science, based on high-speed variable configuration virtual and real data. , models and experience, carry out unified modeling representation of complex systems, intelligent autonomous correlation analysis of model networks, and overall architecture design of the whole-system intelligent iterative evolution optimization method, build a double-loop spiral iterative evolution optimization digital environment, and form a multi-physics cross-domain allostery Aircraft optimization design methods and platforms. It has the ability to intelligently optimize the design of cross-domain allosteric aircraft covering wing extension, bending and torsion deformation; it is compatible with the professional knowledge base of allosteric aircraft aerodynamics, trajectory and heat protection.
(3) Integration projects.
Based on the early layout and funding results of this major research plan, we will concentrate our superior forces and integrate them in the following directions, striving to achieve leapfrog development.
1. Design theory and integrated verification of smooth continuously deforming wings in complex mechanical and thermal environments.
To meet the needs of cross-domain efficient flight of the aerospace transportation system, study the cross-domain aircraft wing deformation strategy and flight environment, the relevant constraints and coupling mechanism and rules of active thermal protection flexible skin and deformation mechanism, and build a multi-disciplinary collaboration of multi-dimensional continuously smooth deforming wings. Design method; break through the design theory and deformation mechanism integration method of large-size special-shaped flexible skin in extreme thermal and thermal environments, and the smooth continuously deforming wing mechanism-structure-heat protection integrated design and performance evaluation method to realize the integration of multi-dimensional smooth continuously deforming wing prototypes and Ground simulation verification. When the aircraft assumes the aircraft configuration, the maximum lift-to-drag ratio in the supersonic state is not less than 2, and the maximum lift-to-drag ratio in the subsonic state is not less than 3.5. A single airfoil has no less than three deformation forms, the area change rate is ≥ 20%, and the equivalent aerodynamic pressure It can maintain smooth and continuous deformation in an environment with a peak value of not less than 7.5kPa; wind tunnel simulation has verified that the size and length of the airfoil prototype is not less than 1.5m and can withstand a heat flow load of 200kW/m2 for more than 400s .
2. Integrated verification of cross-domain allosteric flight multi-physics reconstruction and information sensing transmission technology.
In order to meet the needs of cross-domain (5-25Ma speed range, 20km-orbital altitude) high-speed allosteric aircraft in extreme force, heat and electromagnetic environments, status and situation awareness, reliable information transmission throughout the entire process, etc., the force/thermal/electromagnetic force/thermal/electromagnetic force/thermal/electromagnetic under allosteric conditions of cross-domain aircraft are studied. Scientific issues such as physical field coupling mechanism, intelligent perception and fusion of multi-source information, correlation mechanism between flight environment/state reconstruction and information characteristics, breakthroughs in extreme environmental parameters (non-equilibrium high-temperature flow field electron density ≥10 20 m -3 , total temperature ≥6000K) decoupling measurement and spatial distribution reconstruction technology, distributed antenna system design under complex aircraft shape (minimum window size ≤φ100mm, temperature resistance >1700K@2000s) design and intelligent beam shaping technology, multi-domain (time , frequency, space, energy domain) electromagnetic information intelligent fusion and perception transmission integration (frequency bands: L, S, C, X, Ku, Ka) and other key technologies, to develop an integrated system for aircraft status/environment/electromagnetic perception and information transmission principles , carry out comprehensive experimental verification in a ground simulation environment (plasma electron density ≥ 10 20 m -3 , total temperature ≥ 6000K, plasma jet size > φ100mm) to provide information support for cross-domain efficient intelligent flight.
4. Basic principles for project selection
(1) Closely focus on core scientific issues, pay attention to requirements and application background constraints, and encourage original, basic and cross-cutting frontier exploration.
(2) Prioritize funding for research projects that can solve basic scientific problems in efficient multi-physics flight and have application prospects.
(3) Focus on funding research projects that have a good research foundation and early accumulation, and have direct contributions and support to the overall scientific goals.
5. Funding plan for 2024
It is planned to fund 9-11 cultivation projects. The direct cost of funding is about 800,000 yuan per project. The funding period is 3 years. The research period in the cultivation project application form should be filled in “January 1, 2025 – December 31, 2027”. ; It is planned to fund 5-7 key support projects. The direct cost of funding is about 3 million yuan per project. The funding period is 4 years. The research period in the application form for key support projects should be filled in “January 1, 2025 – December 2028. 31st”; it is planned to fund 2 integrated projects, the direct cost funding intensity is about 12 million yuan per project, the funding period is 3 years, the research period in the application should be filled in “January 1, 2025 – December 31, 2027 “.
6. Application requirements and precautions
(1) Application conditions.
Applicants for this major research plan project should meet the following conditions:
1. Have experience in undertaking basic research projects;
2. Have senior professional and technical positions (professional titles).
Postdoctoral researchers at the station, those who are pursuing a graduate degree, and those who do not have an employer or whose unit is not a supporting unit are not allowed to apply as applicants.
(2) Regulations on limited applications.
Implement the relevant requirements of the limited application provisions in the “Application Regulations” of the “2024 National Natural Science Foundation of China Project Guide”.
(3) Things to note when applying.
Applicants and supporting institutions should carefully read and implement the relevant requirements in this project guide, the “2024 National Natural Science Foundation of China Project Guide” and the “Notice on 2024 National Natural Science Foundation of China Project Application and Finalization and Other Related Matters”.
1. This major research plan project implements paperless application. The application submission date is from April 15, 2024 to 16:00 on April 22.
Project applications are written online. The specific requirements for applicants are as follows:
(1) Applicants should fill in and submit the electronic application form and attached materials online in accordance with the instructions and writing outline requirements for major research plan projects in the Science Fund Network Information System.
(2) This major research plan aims to closely focus on core scientific issues, strategically guide and integrate the advantages of multi-disciplinary related research, and form a project cluster. Applicants should formulate their own project name, scientific objectives, research content, technical routes and corresponding research funds based on the specific scientific problems to be solved by this major research plan and the research direction to be funded announced in the project guide.
(3) Select “Major Research Plan” for the funding category in the application, select “Cultivation Projects”, “Key Support Projects” or “Integrated Projects” for the subcategory description, and select “Scientific Foundation and Control Mechanism of Efficient Flight in Multiphysics” for the annotation. “, select T02 as the acceptance code. Project applications with inaccurate or unselected acceptance codes will not be accepted , and no more than 5 application codes will be selected based on the specific research content of the application project.
The number of cooperative research units for cultivation projects and key support projects shall not exceed 2, and the number of cooperative research units for integrated projects shall not exceed 4.
(4) In the section “2. Research content, research objectives, and key scientific issues to be solved” in “(1) Project establishment basis and research content”, the applicant should first explain that the application project meets the specific requirements in this project guide Funded research direction ( indicate the research direction serial number and corresponding content in the guide ), and its contribution to solving the core scientific issues of this major research plan and achieving the scientific goals of this major research plan .
If the applicant has already undertaken other science and technology projects related to this major research plan, the differences and connections between the applied project and other related projects should be discussed in the “Research Basis and Working Conditions” section of the main body of the application.
2. The supporting unit shall complete the supporting unit’s commitment, organize the application, and review the application materials as required. Submit the unit’s electronic application and attachment materials through the information system item by item before 16:00 on April 22, 2024 , and submit the unit’s project application list online before 16:00 on April 23 .
3. Other matters needing attention.
(1) In order to achieve the overall scientific goals and multidisciplinary integration of major research plans, the project leader who receives funding should promise to abide by relevant data and information management and sharing regulations. During the project implementation process, attention should be paid to the relationship with other projects of this major research plan. mutually supportive relationship.
(2) In order to strengthen the academic exchanges of the project, promote the formation of project groups and multi-disciplinary intersection and integration, this major research plan will hold an annual academic exchange meeting for funded projects every year, and will organize academic seminars in related fields from time to time. . The person in charge of the funded project is obliged to participate in the above-mentioned academic exchange activities organized by the guidance expert group and management working group of this major research plan, and conduct academic exchanges seriously.
(4) Consultation methods.
Division 2, Interdisciplinary Science Department, National Natural Science Foundation of China
Contact number: 010-62329548, 010-62329489