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Structural dynamic responses of a stripped solar sail subjected to solar radiation pressure

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Chinese Journal of Aeronautics 2020年第8期33卷 2204-2211页

作者： Junhui ZHANG Na WU An TONG Yinghua LIU School of Civil Engineering North China University of TechnologyBeijing 100144China School of Aerospace Engineering Tsinghua UniversityBeijing 100144China

The stripped solar sail whose membrane is divided into separate narrow membrane strips is believed to have the best structural *** this paper,the stripped solar sail structure is regarded as an assembly made by connecting a number of boom-strip components in *** the coupling effects between booms and membrane strips,an exact and semianalytical method to calculate structural dynamic responses of the stripped solar sail subjected to solar radiation pressure is *** case study of a 100 m stripped solar sail shows that the stripped architecture helps to reduce the static deflections and amplitudes of the steady-state dynamic *** prestress of the membrane strips will decrease stiffness of the sail and increase amplitudes of the steady-state dynamic *** thickness of the boom will benefit to stability of the sail and reduce the resonant *** proposed semi-analytical method provides an efficient analysis tool for structure design and attitude control of the stripped solar sail.

关键词： Distributed transfer function method Frequency response solar radiation pressure solar sail Structural dynamic response

Convex optimization of asteroid landing trajectories driven by solar radiation pressure

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Chinese Journal of Aeronautics 2022年第12期35卷 200-211页

作者： Chuanjun DONG Hongwei YANG Shuang LI Bo LI College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 211106China Tianjin Key Laboratory of Microgravity and Hypogravity Environment Simulation Technology Tianjin 300458China Tianjin Institute of Aerospace Mechanical and Electrical Equipment Tianjin 300458China

High-area/mass ratio landers driven by solar radiation pressure(SRP)have potential applications for future asteroid landing *** paper develops a new convex optimization-based method for planning trajectories driven by SRP.A Minimum Landing Error(MLE)control problem is formulated to enable planning SRP-controlled trajectories with different flight *** is transformed into Second Order Cone Programming(SOCP)successfully by a series of different convexification technologies.A trust region constraint and a modified MLE objective function are used to guarantee the convergence performance of the optimization ***,the SRP-driven trajectory optimal control problem is converted equivalently into a sequence of convex optimal control problems that can be solved effectively.A set of numerical simulation results has verified the effectiveness and feasibility of the proposed optimization method.

关键词： Asteroids Convex optimization Optimal control Soft landing solar radiation pressure Trajectory optimization

Effects of solar radiation pressure on asteroid surface hopping transfers for high area/mass ratio rovers

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Research in Astronomy and Astrophysics 2021年第6期21卷 337-348页

作者： Chuan-Jun Dong Hong-Wei Yang Shuang Li Xue-Wen Liu College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The high area/mass ratio hopping rovers have potential applications in future asteroid surface *** paper systematically investigates the effects of solar radiation pressure(SRP)on ballistic surface hopping transfers for the asteroid 101955 *** of SRP on the traveled distance and the trajectory design of hopping transfers are analyzed and *** simulation results indicate that it is necessary to take SRP into account to ensure the success of hopping transfers and the proper use of SRP can help design the trajectories of hopping transfers with low initial impulses and short transfer *** also reveals the potential possibility in using SRP to control the post-hopping transfers with specific control policies in the future surface exploration of asteroids.

关键词： asteroid hopping solar radiation pressure dynamics trajectory

Forced motions around triangular libration points by solar radiation pressure in a binary asteroid system

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Astrodynamics 2020年第1期4卷 17-30页

作者： Xi-Yun Hou Xiao-Sheng Xin Jing-Lang Feng School of Astronomy and Space Science Nanjing University163 Xianlin Ave.Qixia DistrictNanjing210023China Institute of Space Environment and Astrodynamics Nanjing University5 Xanxiu CunGulou DistrictNanjing210093China Key Laboratory of Modern Astronomy and Astrophysics Ministry of EducuationNanjing210023China Beijing Institute of Tracking and Telecommunication Technology 26 Beiqing RoadHaidian DistrictBeijing100094China

By using two tri-axial ellipsoids to approximate the two asteroids,forced orbits around triangular libration points of the binary asteroid system(BAS)induced by solar radiation pressure are *** work is firstly carried out in the doubly synchronous binary asteroid system(DSBAS).The results show that the amplitude of the forced periodic orbit can be large,even for small to moderate surface area-to-mass ratios of the *** position,amplitude,and stability of these forced periodic orbits are influenced by the asteroids'non-spherical ***,the stability of them may be different,depending on the Sun's motion direction *** the BAS's orbit motion *** study is then generalized to the asynchronous and synchronous BAS(ABAS and SBAS,respectively).The forced orbits in the complete system are quasi-periodic orbits around the forced periodic orbit of the averaged system.

关键词： binary asteroid system(BAS) solar radiation pressure forced periodic orbit stability

Self-excited oscillation of spinning solar sails utilizing solar radiation pressure

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Astrodynamics 2020年第3期4卷 177-192页

作者： Yuki Takao Osamu Mori Jun'ichiro Kawaguchi Department of Aeronautics and A stronautics The University of TokyoTokyo 113-8654Japan Institute of Space and Astronartical Science Japan Aerospace Exploration AgencySagamihara 252-5210Japan

The present paper proposes a control method to excite spinning solar sail membranes for three-dimensional *** optical property switching,the input is given as the change in magnitude of the solar radiation *** resonance point of this system varies with the vibration state due to its nonlinearity and the change in equilibrium *** deal with this,a state feedback control law that automatically tracks the resonance point is developed in the present *** proposed method enables decentralized control of the actuators on the sail,each of which determines the control input independently using only the information of vibration *** proposed method is validated using numerical *** results show that the nonlinear system behaves differently from the linear system,and the vibration grows using the decentralized control regardless of resonance point variation.

关键词： solar sail solar radiation pressure vibration mode self-excited oscillation mechanical resonance decentralized control

solar radiation pressure Modeling and Application of BDS Satellites

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Journal of Geodesy and Geoinformation Science 2020年第2期3卷 45-52页

作者： Qiuli CHEN Hui YANG Zhonggui CHEN Haihong WANG Chen WANG Beijing Institute of Engineering Spacecraft System Beijing 100094China GNSS Research Center Wuhan UniversityWuhan 430079China

solar radiation pressure(SRP)model is the basis of high precise orbit determination and positioning of navigation *** present,it is common to see the study of SRP model of BDS ***,the establishment and application of a comprehensive analytical SRP model based on satellite physical parameters are *** from other conservative forces and non-conservative forces,SRP is closely related to the satellite’s physical parameters and in-orbit *** the basis of the physical mechanism of solar radiation,BDS satellite physical parameters,in-orbit attitude control mode,and so on,a comprehensive analytical model has been studied in this *** on precise ephemeris and satellite laser ranging(SLR)data,the precision of a comprehensive analytical model has been *** the precision of orbit determination is at the decimeter level using this comprehensive analytical SRP *** to the satellite conservation theorem of angular momentum and change of in-orbit telemetry parameters,the difference between a comprehensive analytical model and the actual in-orbit interference force has been analyzed and *** addition of empirical items on the comprehensive analytical model has been *** validations demonstrated that the orbit precision of BDS C08 and C10 can be achieved at 0.078 m and 0.084 m *** with using the improved CODE empirical model,precision orbit accuracy of them has increased by 0.021 m and 0.045 m respectively.

关键词： BDS satellite solar radiation pressure comprehensive analytical model experience correction item precise orbit determination

Analysis of Effect of solar radiation pressure of Bigger Primary on the Evolution of Periodic Orbits

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International Journal of Astronomy and Astrophysics 2016年第4期6卷 464-493页

作者： Niraj Pathak V. O. Thomas Department of Mathematics Dharmsinh Desai University Nadiad India Department of Mathematics The Maharaja Sayajirao University of Baroda Vadodara India

Evolution of periodic orbits in Sun-Mars and Sun-Earth systems are analyzed using Poincare surface of section technique and the effects of solar radiation pressure of bigger primary and actual oblateness of smaller primary on these orbits areconsidered. It is observed that solar radiation pressure of bigger primary has substantial effect on period, orbit’s shape, size and their position in the phase space. Since these orbits can be used for the design of low energy transfer trajectories, so perturbations due to solar radiation pressure has to be understood and should be taken care of during trajectory design. It is also verified that stability of such orbits are negligible so they can be used as transfer orbit. For each pair of solar radiation pressure q and Jacobi constant C we get two separatrices where stability of island becomes zero. In this paper, detailed stability analysis of periodic orbit having two loops is given when q = 0.9845.

关键词： Restricted Three Body Problem Low Energy Trajectory Design Periodic Orbits solar radiation pressure Poincare Surface of Section

Design,modeling and experimental investigation of a novel solar sail with high area-to-mass ratios for efficient solar sailing

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Chinese Journal of Aeronautics 2024年第10期37卷 234-248页

作者： Zhongjing REN Chengyang LI Ke WU Ziran WANG Haipeng WANG Peng YAN Key Laboratory of High-efficiency and Clean Mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong UniversityJinan 250061China China Manned Space Agency Beijing 100071China

solar sailing is a promising propellant-free approach to propelling spacecraft in ***, the propelling efficiency of conventional solar sail spacecraft is limited by their areato-mass ratios. This paper proposes a novel design of micro solar sails with area-to-mass ratios above 100 m^(2)/kg for next-generation chip-scale spacecraft. Bilayer thin films developed by Microelectromechanical Systems(MEMS) technologies were patterned into grid microstructures, and theoretical analysis of a sail prototype was conducted. The electro-thermal and thermo-mechanical models of the solar sail in geospace were established by taking effects of Joule heating, solar radiation, and thermal re-emission into consideration, enabling rapid prediction of its threedimensional(3-D) reconfiguration from the as-released two-dimensional(2-D) *** of the Chip Sail's acceleration arising from the sail's morphing was also analytically modeled. Fabrication and characterization of the sail prototype made of multiple Al/Ni_(50)Ti_(50) bilayer beams were accomplished. In-situ SEM imaging of the sail prototype in vacuum chamber witnessed an active and continuous 3-D reconfiguration under Joule heating, and over 90° deformation was detected by applying a DC voltage of 0.078 V. Theoretical and experimental work on the solar sail with at least 10 times higher area-to-mass ratios than conventional ones will lay a solid foundation for efficient solar sailing.

关键词： solar sails solar sailing High area-to-mass ratios solar radiation pressure ChipSail

solar sail attitude control using shape variation of booms

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Chinese Journal of Aeronautics 2022年第10期35卷 326-336页

作者： Feng ZHANG Shengping GONG Haoran GONG Hexi BAOYIN School of Aerospace Engineering Tsinghua UniversityBeijing 100084China School of Astronautics Beihang UniversityBeijing 100083China

Active attitude control of solar sails is required to control the direction of the force generated by solar radiation pressure(SRP). It is desirable to control the attitude through propellantfree means. This paper proposes a new method for attitude control of solar sails: A boom consisting of "smart" structural material can be deformed by the piezoelectric actuator, and solar radiation pressure torque will be generated due to shape variation of sail membrane caused by boom deformation. The method has the advantages of simple structure, small disturbance and small additional load, and is not limited by the size of the solar sail. The case of rendezvous with the Asteroid 2000SG344 is used to verify the attitude control around the pitch and yaw axes.

关键词： Attitude control Boom deformation Dynamics solar radiation pressure solar sail