Reporter : Professor Zichen Deng (School of Aeronautics, Northwestern Polytechnical University)

Time: October 24, 2021 (Sunday) 15:30 pm

Location: Room 1109, Building A18, Ming Palace Campus

Sponsor: State Key Laboratory of Mechanical Structural Mechanics and Control, School of Aeronautics, Aerospace Interdisciplinary Research Institute, Association for Science and Technology

Summary of report content:

Super-large spacecraft is a major space infrastructure for obtaining space energy, scouting ground targets, and exploring the mysteries of the universe. The structure size of the super-large spacecraft reaches the kilometer scale, which exhibits completely different dynamic characteristics and control requirements from conventional-sized aerospace structures. The report introduces the research progress of the research group in the dynamics and control of the ultra-large spacecraft in the two stages of orbital operation and space assembly. Aiming at the on-orbit operation stage, the orbit - attitude - structure fully coupled dynamics modeling method of super-large spacecraft is proposed, the structure-preserving numerical algorithm of the fully coupled dynamics equation is constructed, and the high-precision attitude tracking algorithm for space solar power plants is developed. Aiming at the space assembly stage, for the lightweight and controllable design requirements of space assembly modules, preliminary research on assembly module design, dynamic modeling, and active shape control is carried out; In order to solve the problems of incremental configuration and orbit - attitude - structure coupling, the dynamic modeling, trajectory planning and trajectory tracking control of the space assembly process of super-large structural modules are initially explored.

Brief introduction of the reporter:

Zichen Deng, Dean of the School of Aeronautics of Northwestern Polytechnical University, Director of the Key Laboratory of Dynamics and Control of Complex Systems, Ministry of Industry and Information Technology, and Changjiang Scholar Distinguished Professor of the Ministry of Education. At present, he is mainly engaged in teaching and scientific research in dynamics and control, engineering mechanics, computational mechanics, and applied mathematics.

In recent years, he has been engaged in the interdisciplinary research of computational mechanics and control theory and the symplectic numerical method of Hamiltonian dynamic systems, and has effectively applied the research results to nonlinear system dynamics, flexible multi-body system dynamics, aerospace system dynamics, advanced Composite material optimization design and other fields. He has presided over more than 40 national, provincial and ministerial scientific research projects. He has published more than 320 papers, 5 academic monographs , and won 5 provincial and ministerial science and technology awards .

Current main academic part-time jobs include:

Member of the Mechanics Discipline of the Discipline Evaluation Group of the State Council

Member of the Mechanics Professional Steering Committee of the Ministry of Education

Deputy Director of the Dynamics and Control Professional Committee of the Chinese Society of Mechanics