Although the complex structure-preserving method presented in our previous studies can be used to investigate the orbit–attitude–vibration coupled dynamic behaviors of the spatial flexible damping beam,the simulatio...Although the complex structure-preserving method presented in our previous studies can be used to investigate the orbit–attitude–vibration coupled dynamic behaviors of the spatial flexible damping beam,the simulation speed still needs to be improved.In this paper,the infinite-dimensional dynamic model describing the orbit–attitude–vibration coupled dynamic problem of the spatial flexible damping beam is pretreated by the method of separation of variables,and the second-level fourth-order symplectic Runge–Kutta scheme is constructed to investigate the coupling dynamic behaviors of the spatial flexible damping beam quickly.Compared with the simulation speed of the complex structure-preserving method,the simulation speed of the symplectic Runge–Kutta method is faster,which benefits from the pretreatment step.The effect of the initial radial velocity on the transverse vibration as well as on the attitude evolution of the spatial flexible damping beam is presented in the numerical examples.From the numerical results about the effect of the initial radial velocity,it can be found that the appearance of the initial radial velocity can decrease the vibration frequency of the spatial beam and shorten the evolution interval for the attitude angle to tend towards a stable value significantly.In addition,the validity of the numerical results reported in this paper is verified by comparing with some numerical results presented in our previous studies.展开更多
This paper aims to improve the autonomous operational capabilities of spacecraft.For a complex system with physical coupling and flexible attachments,an autonomous reconfigura-tion strategy based on reconfigurability ...This paper aims to improve the autonomous operational capabilities of spacecraft.For a complex system with physical coupling and flexible attachments,an autonomous reconfigura-tion strategy based on reconfigurability evaluation is proposed.First,a quantitative evaluation index for reconfigurability is given based on operator theory to fully exploit the potential of system reconfigurability under resource constraints.Then,specific requirements and evaluation methods for autonomous reconfiguration are proposed in accordance with the results,thereby providing a theoretical reference for the design of reconfiguration strategy methods.Thus,reconfigurability is maximized from the design point of view.Finally,the validity and cor-rectness of the method are verified by simulation.展开更多
基金supported by the National Natural Science Foundation of China(12172281,11972284 and 11872303)Fund for Distinguished Young Scholars of Shaanxi Province(2019JC-29)+1 种基金Foundation Strengthening Programme Technical Area Fund(2021-JCJQ-JJ-0565)Fund of the Youth Innovation Team of Shaanxi Universities and the Open Foundation of State Key Laboratory of Structural Analysis of Industrial Equipment(GZ19103).
文摘Although the complex structure-preserving method presented in our previous studies can be used to investigate the orbit–attitude–vibration coupled dynamic behaviors of the spatial flexible damping beam,the simulation speed still needs to be improved.In this paper,the infinite-dimensional dynamic model describing the orbit–attitude–vibration coupled dynamic problem of the spatial flexible damping beam is pretreated by the method of separation of variables,and the second-level fourth-order symplectic Runge–Kutta scheme is constructed to investigate the coupling dynamic behaviors of the spatial flexible damping beam quickly.Compared with the simulation speed of the complex structure-preserving method,the simulation speed of the symplectic Runge–Kutta method is faster,which benefits from the pretreatment step.The effect of the initial radial velocity on the transverse vibration as well as on the attitude evolution of the spatial flexible damping beam is presented in the numerical examples.From the numerical results about the effect of the initial radial velocity,it can be found that the appearance of the initial radial velocity can decrease the vibration frequency of the spatial beam and shorten the evolution interval for the attitude angle to tend towards a stable value significantly.In addition,the validity of the numerical results reported in this paper is verified by comparing with some numerical results presented in our previous studies.
文摘This paper aims to improve the autonomous operational capabilities of spacecraft.For a complex system with physical coupling and flexible attachments,an autonomous reconfigura-tion strategy based on reconfigurability evaluation is proposed.First,a quantitative evaluation index for reconfigurability is given based on operator theory to fully exploit the potential of system reconfigurability under resource constraints.Then,specific requirements and evaluation methods for autonomous reconfiguration are proposed in accordance with the results,thereby providing a theoretical reference for the design of reconfiguration strategy methods.Thus,reconfigurability is maximized from the design point of view.Finally,the validity and cor-rectness of the method are verified by simulation.
