Notice on Issuing the 2023 Annual Project Guide of the Major Research Plan on the Basis and Regulation Mechanism of Multi-physical Field Efficient Flight Science
Major research plan on the basis and regulation mechanism of multi-physical field efficient flight science 2023 project guide
The major research plan of “Scientific Basis and Regulation Mechanism of Multi-physical Field Efficient Flight” is aimed at the major demand of reaching high-speed civil aviation and flying to and from the world in about one hour, focusing on the major basic problems of multi-physical field efficient flight. Through the continuous change of aircraft configuration, combined with active flow regulation and intelligent control, the efficient and repeatable intelligent flight of aircraft across large airspace and wide speed domain is realized, providing theoretical basis and technical support for the innovative development of space transportation system.
1. Scientific objectives
Aiming at the important national demand of China’s space transportation system, a new idea of cross-domain efficient and intelligent flight is put forward. Facing the key characteristics of cross-domain, deformable and repeatable flight, an unsteady aerodynamic model is established, the theory of real-time perception and intelligent control of multiple physical parameters is developed, and key technologies such as active thermal protection, deformable mechanism-structure design, active flow control, electromagnetic thermal environment simulation and scientific experiments are broken through, and a number of original results of efficient flight with multiple physical fields are obtained. It will lead to the deep integration and innovative development of disciplines, innovate the paradigm of intelligent system engineering for aerospace giant systems, provide key theories, methods, technologies and talent pool for China’s future space transportation system, and promote 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-physical field coupling mechanism of deformable materials and mechanisms.
The mechanism of thermal protection, deformation mechanism and structure, rigid-flexible coupling of flexible material-deformation mechanism under complex constraints is revealed, and a new method for structural health monitoring, durability and damage tolerance evaluation is established to meet the extreme demand for aircraft deformation materials and mechanisms.
(2) Cross-domain unsteady flow model and regulation mechanism.
The interaction mechanism between aircraft flow and flight deformation under complex time-varying boundary conditions is studied, and active flow control means are developed to realize accurate prediction of aerodynamic characteristics and efficient heat reduction and drag reduction.
(3) Integrated intelligent control of deformation and flight.
This paper reveals the coupling control mechanism of flight dynamics in a strongly uncertain environment, breaks through key technologies such as cross-domain seamless autonomous navigation and online autonomous planning and decision-making of environment-task self-matching, and constructs an integrated intelligent control method for variable configuration and aircraft.
3. Research direction of funding in 2023
(1) Cultivation projects.
Focusing on the above-mentioned scientific problems, with the overall scientific goal as the traction, it is planned to fund a number of cultivation projects with strong exploration, novel topics and good preliminary research foundation. The research direction is as follows (the declared projects must cover some or all of the contents listed in the following single direction):
- Design theory and method of multi-physical field efficient flight allosteric thermal protection materials.
Explore the design theory and method of multi-physical field efficient flight allosteric thermal protection materials. The design theory and method of stretchable super hydrophilic high temperature resistant flexible new concept heat protection material are studied. Develop a new method of forming process design for high temperature hot end parts; Develop the design and fabrication method of flexible heat flow sensor in high temperature oxidation environment; A new principle and method of on-line self-sensing damage of high temperature thermal protection materials are explored.
- Design principles and methods of variable configuration mechanism and structure of aircraft.
Explore new principles and methods for designing multi-stable, large-load and fast-response variable-configuration mechanisms. Develop new methods of variable configuration high power-to-weight ratio drive and efficient transmission; The compliant large deformation and bearing mechanism of flexible thermal protection structure is studied, and the coordination and matching mechanism of movement and load transfer between multi-dimensional deformation mechanism and flexible thermal protection structure is revealed. Explore the new principle and method of tire structure design under the condition of ultra-high speed and strong impact landing.
- Unsteady aerodynamics theory and method of trans-domain morphing flight.
Explore the trans-basin transition, theory of turbulence and methods of trans-domain metamorphic high-speed aircraft. A theoretical model of turbulence and transition in high-speed discontinuous media is established for unsteady processes such as continuous deformation and surface gas overflow. Study the dynamic grid technology with high quality and strong robustness, and develop a high-precision time-space consistent calculation method for unsteady boundary turbulence and transition across river basins.
- Theory and method of active flow control for trans-domain metamorphic flight in multi-physical field environment.
Explore new principles and methods of adaptive intelligent flow control under unsteady conditions of trans-domain variable structure flight. The active flow control methods and strategies of boundary layer instability, transition and flow separation of trans-domain metamorphic aircraft are studied. Explore a new mechanism of heat reduction and drag reduction with high efficiency and low power consumption for trans-domain morphing aircraft; A new method of high-speed unsteady flow test and measurement is studied.
- Theory and method of multi-dimensional continuous large deformation intelligent flight control.
Develop bionic seamless autonomous navigation method under the environment of cross-domain long-endurance satellite refusal; The nonlinear motion mechanism and modeling method of propellant in return process are studied. Developing the method of variable structure decision-making, fault diagnosis and supervision control of aircraft based on discrete event system; The online autonomous learning and evolution of control and deformation strategies under strong uncertainty of tasks and models are studied.
- Multi-physical field efficient flight information perception, channel model and ground simulation measurement method.
Explore the high-precision three-dimensional measurement method of the thermo-mechanical electromagnetic parameters of the deformed structure covered by the plasma flow field in the ground simulation device; Establish cross-domain flight integrated channel modeling and online prediction method; The resource awareness and reliable communication technology of heterogeneous cooperative measurement and control network for cross-domain metamorphic aircraft are studied.
- Research on approximate representation method of cross-domain deformable aircraft model with small sample size.
This paper reveals the rapid prediction mechanism of performance fidelity of cross-domain metamorphic aircraft system under the condition of small samples. This paper studies the spatial low-loss dimension reduction mechanism of cross-domain aircraft combined variable configuration design; Develop the hierarchical approximate representation method of virtual sample migration and dynamic embedding, and break through the approximate model updating technology including deformation mechanism; Explore the concept, connotation and basic methods of intelligent system engineering for complex spacecraft design.
(2) Key support projects.
Focusing on the core scientific issues and guided by the overall scientific goal, it is planned to fund a number of key support projects with good accumulation of preliminary research results, which are in the forefront of the current hot spots and have made great contributions to the overall scientific goal. The research direction is as follows (the declared projects must cover all the contents listed in the following single direction):
- On-line health perception and dynamic prediction method of reusable lightweight and efficient thermal structural materials for cross-domain aircraft.
Facing the requirements of high-precision online sensing of the mechanical and thermal response of reusable thermal protection materials at 1600℃ and life prediction, this paper reveals the performance evolution law and mechanism of reusable thermal protection materials in long-term service, puts forward the theory and model of multi-factor damage accumulation of thermal protection materials, and constructs the in-situ sensing method of thermal/mechanical properties of thermal protection materials in extreme thermal environment. The ground test method of dynamic sensing and prediction of residual life based on data-model fusion in thermo-mechanical coupling environment is developed, and the theory of perception, evaluation and prediction of reusable performance of lightweight and efficient thermal structural materials is formed, and the wind tunnel test demonstration and verification of typical samples and environmental conditions are completed.
- Fluid-structure coupling model and calculation method of cross-domain continuous deformable aircraft.
In ord to meet that great demand of morphing aircraft with wide speed domain (0-25Ma) and large airspace (0-100km) to adapt to the flight thermal environment and shape the flow environment through distributed multidimensional continuous deformation of flexible skin wings, a new strong robust compact gas dynamic immersion boundary fluid-solid coupling algorithm suitable for cross-domain high-speed flight continuous morphing is studied. Breaking through the numerical simulation technology of large deformation compressible fluid-solid coupling of fluid-skin-driven rigid-flexible coupling multi-body system of cross-domain continuous morphing aircraft, a machine learning model of unsteady flow field and fluid-solid coupling of wide-speed domain and large-space morphing aircraft is established, a high-precision prediction method of aerodynamic thermal characteristics and aerodynamic servo-elastic response of cross-domain morphing aircraft during active deformation is developed, and the evolution mechanism of unsteady flow, fluid-solid coupling effect and its regulation mechanism of multi-dimensional continuous deformation of flexible skin wings are revealed.
- On-line integrated planning and self-learning control of modal trajectory of trans-domain metamorphic flight.
Aiming at the characteristics of high-dimensional heterogeneity of dynamics, mutual restriction of configuration, trajectory and control, and multi-constraint and multi-objective of trans-domain (5-25Ma speed domain and 30-100km airspace) metamorphic flight, a high-dimensional spatial clustering method of “configuration-airspace-speed domain” based on parametric modeling and data-driven is explored, and a typical cross-domain dynamic modal library oriented to control is established. A hierarchical online solution framework of combined continuous mixed integers integrating modal decision-making, trajectory optimization and control is constructed to solve the problem of reinforcement learning modal decision-making under multi-dimensional sparse constraints and multi-scale composite objectives, reveal the adaptive mechanism of strong convergence convex optimization real-time trajectory planning to cross-modal dynamics, break through the key technology of self-learning frequency domain/time domain hybrid predictive control for cross-domain large envelope morphing flight, and realize the integrated design of online decision-making, guidance and control.
- Learning and uncertainty analysis of cross-domain deformation force thermal prediction model driven by knowledge resource map.
This paper studies the learning method of efficient prediction model of force and thermal effect in trans-domain aircraft’s morphing flight process. Based on the knowledge resource maps such as simulation, experimental data and physical mechanism, it explores the methods of machine learning discovery, parameter inversion and model correction of the coupling effect model of morphing and environment, breaks through the robust prediction technology of coupling effect based on vertical combination and horizontal integration of multi-class multi-layer models, studies the analysis methods of physics, data, training and prediction uncertainty of efficient prediction model, develops an efficient prediction system of force and thermal effect in morphing flight process and completes the experimental verification.
- Intelligent decision-making and precise control of flight pipeline based on spatial dynamic perception.
Aiming at the control problems brought by high-density space non-cooperative targets such as low-orbit giant constellations, space debris and debris, and the harsh mechanical and thermal environment during the high-speed, cross-domain and flexible shuttle flight of cross-domain aircraft (100-400km airspace) from the ascending phase to the re-entry phase, the online perception and threat assessment technology of space environment (low-orbit aircraft, giant constellations, space debris and debris, etc.) is studied based on prior information and system support. The intelligent real-time decision-making theory and safety control method of flight pipeline based on the combination of logic drive and data drive are studied. The precise stability control technology of aircraft in dynamic and narrow pipeline is studied.
- Study on electromagnetic characteristics and control mechanism of flexible super-surface in extreme environment of cross-domain high-speed aircraft.
In order to meet the requirements of electromagnetic feature reduction and target detection in the extreme environment (electron density > 1018m-3 and temperature > 3000K in the unbalanced high-temperature flow field) of the trans-domain high-speed aircraft, the theory and method of electromagnetic characteristics regulation of the flexible super-surface with heat protection are explored, the electromagnetic coupling mechanism between the unbalanced high-temperature flow field and the flexible super-surface of the trans-domain aircraft is revealed, the electromagnetic characteristics and active regulation mechanism of the flexible super-surface are studied, the high-temperature resistant and adjustable electromagnetic characteristics flexible super-surface samples are developed, and the non-equilibrium is carried out.
- Intelligent planning, decision-making and control of deformable flight under the coupling of multiple physical fields.
The motion model of large-scale morphing flight coupled with multiple physical fields is established, the motion characteristics and boundaries of morphing flight under the interaction between aircraft and environment are described, and the influence mechanism of configuration change on profile control ability and cross-domain motion is revealed. The theory of flight capability evaluation, configuration decision-making, trajectory planning and guidance control driven by mechanism and data is studied to solve the problems of online self-learning and self-evolution under multi-mission and multi-source interference, and realize double closed-loop intelligent decision-making planning and guidance control of configuration capability and mission trajectory under multi-dimensional continuous change conditions.
4, Basic principles of project selection
(1) closely around the core scientific issues, pay attention to demand and application background constraints, and encourage original, basic and cross-cutting frontier exploration.
(2) give priority to research projects that can solve the basic scientific problems in multi-physical field efficient flight and have application prospects.
(3) key support projects should have a good research foundation and early accumulation, and have a direct contribution and support to the overall scientific objectives.
5. Funding Plan for 2023
It is planned to fund 14-16 cultivation projects, with a direct cost of about 800,000 yuan/item and a funding period of 3 years. The research period in the application for cultivation projects should be filled in as “January 1, 2024-December 31, 2026”; It is planned to support 5-7 key support projects, with the direct funding cost of about 3 million yuan/project and the funding period of 4 years. The research period in the application for key support projects should be “January 1, 2024-December 31, 2027”.
6. Application Requirements and Precautions
(1) Application conditions.
The applicant for this major research project shall meet the following conditions:
- Have the experience of undertaking basic research projects;
2 with senior professional and technical positions (titles).
Postdoctoral researchers in the station, those who are studying for graduate degrees, and those who have no work unit or whose unit is not a supporting unit may not apply as applicants.
(2) Provisions on application for restricted items.
Implement the relevant requirements specified in the “Application Provisions” of the 2023 National Natural Science Foundation Project Guide.
(3) Matters needing attention in application.
The applicant and the supporting unit shall carefully read and implement the relevant requirements in the project guide, the 2023 National Natural Science Foundation Project Guide and the Notice on the Application and Closing of the 2023 National Natural Science Foundation Project.
- This major research project is paperless. The application is submitted from September 1, 2023 to 16:00 on September 7, 2023.
The project application is written online. The specific requirements for the applicant are as follows:
(1) The applicant shall fill in and submit the electronic application form and attachment materials online in accordance with the instructions for reporting and outline writing of major research projects in the network information system of NSFC.
(2) This major research plan aims to closely focus on the core scientific issues, conduct strategic direction guidance and advantage integration for multi-disciplinary related research, and become a project cluster. The applicant shall draw up the project name, scientific objectives, research contents, technical route and corresponding research funds by himself according to the specific scientific problem to be solved in this major research plan and the research direction to be funded by the project guide.
(3) In the application, the funding category is “Major Research Plan”, the subcategory indicates “Cultivation Project” or “Key Support Project”, the notes indicate “Multi-physical Field Efficient Flight Science Foundation and Regulation Mechanism”, the acceptance code is T02, and no more than five application codes are selected according to the specific research content of the application project.
There shall be no more than 2 cooperative research units for cultivation projects and key support projects.
(4) In the part of “Project Basis and Research Content”, the applicant shall first state that the application project conforms to the specific funded research direction in this project guide (indicating the research direction serial number and corresponding content in the guide), and its contribution to solving the core scientific problems of this major research plan and realizing the scientific objectives of this major research plan.
If the applicant has undertaken other scientific and technological projects related to this major research plan, it should discuss the differences and connections between the applied project and other related projects in the “research basis and working conditions” part of the main body of the application.
- The supporting unit shall, in accordance with the requirements, complete the commitment of the supporting unit, organize the application and review the application materials. Before 16: 00 on September 7, 2023, the electronic application form and attachment materials of the unit will be confirmed one by one through the information system, and the project application list of the unit will be submitted online before 16: 00 on September 8.
- Other precautions.
(1) In order to achieve the overall scientific objectives and multidisciplinary integration of major research programs, the project leaders who have received funding should promise to abide by the regulations on the management and sharing of relevant data and materials, and pay attention to the mutual support relationship with other projects in this major research program during the project implementation.
(2) In order to strengthen the academic exchange of the project and promote the formation of the project group and interdisciplinary integration, this major research plan will hold an annual academic exchange meeting of funded projects every year, and will organize academic seminars in related fields from time to time. The person in charge of the funded project has the obligation to participate in the above-mentioned academic exchange activities organized by the guiding expert group and management working group of this major research plan, and earnestly carry out academic exchanges.
(4) Consultation methods.
Division 2, Department of Interdisciplinary Science, National Natural Science Foundation of China
Tel: 010-62329489
* Note: Multi-physical fields refer to the high-temperature field (the ambient temperature of air on the surface of the aircraft is more than 3000K), the aerodynamic field (the aircraft configuration and the unsteady time-varying gas-solid interface on the surface) and the electromagnetic field (the complex electromagnetic environment of cross-domain repeatable high-speed flight) caused by the friction between the surface and air during the flight. This major research plan focuses on the problems in one or more complex physical fields.