Article
Automation & Control Systems
Liangming Chen, Zhiyun Lin, Hector Garcia de Marina, Zhiyong Sun, Mir Feroskhan
Summary: This paper focuses on solving the maneuvering problem of angle rigid formations in both 2D and 3D environments. In the 2D case, a formation maneuvering law is designed using local relative position and velocity measurements. In the 3D case, a formation maneuvering law is proposed by assuming that all the followers' coordinate frames share a common Z direction. The effectiveness of the proposed algorithms is validated through simulation examples.
IEEE-CAA JOURNAL OF AUTOMATICA SINICA
(2022)
Article
Automation & Control Systems
Liangming Chen, Mingming Shi, Hector Garcia de Marina, Ming Cao
Summary: This article studies 2D formation stabilization and maneuvering of mobile agents governed by double-integrator dynamics. A carefully chosen set of angle constraints is used to achieve the desired angle rigid formation. Stabilization control law using local velocity and direction measurements is proposed. Formation maneuvering laws are also presented to guide the formation with desired translational velocity, orientation, and scale.
IEEE TRANSACTIONS ON CONTROL OF NETWORK SYSTEMS
(2022)
Article
Engineering, Mechanical
Ye Yuan, Qingning Lan, Liang Ding, Huaiguang Yang, Haibo Gao, Zhengyin Wang, Chaojie Yang, Zongquan Deng
Summary: Terramechanics is crucial in planetary exploration rovers, with a new model proposed for calculating wheel stresses and two minimized models for estimating interaction forces showing high efficiency and accuracy.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Multidisciplinary
Aevelina Rahman, Danesh Tafti
Summary: The study investigates the role of aerodynamics and wing inertia in the motion dynamics of two species of roundleaf bats during maneuvering flight. Inertial forces are found to play a crucial role in certain maneuvers, while aerodynamic forces primarily drive the bat's translational trajectory. Roll maneuvers are driven by aerodynamic asymmetries, while yaw maneuvers are primarily driven by wing inertial moments.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Engineering, Electrical & Electronic
Yan Li, Songhua Yan, Jianya Gong
Summary: This article discusses the hot issue of using global navigation satellite systems as transmitters of opportunity for target detection, and proposes a new algorithm to address the issues inherent in this technology, focusing on refocusing the echo under the condition of Beidou Geostationary satellites.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Mathematics, Applied
Aaditya Rangan
Summary: A common task in single particle electron cryomicroscopy (cryo-EM) is the rigid alignment of images and/or volumes. An algorithm using radial-SVD can greatly accelerate this process and save computational time.
Article
Geochemistry & Geophysics
Jingtao Ma, Jinpei Yu, Guang Liang, Siyue Sun, Xinglong Jiang, Penghui Huang
Summary: A new method is proposed in this letter to address the issue of invalid target parameter estimation caused by irregular signal sampling in a new-style radar. The method utilizes random pulse resampling and coherent integration to reconstruct the signal and eliminate residual coupling between range and azimuth.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Engineering, Civil
Shixi Zang, Jiayao Ma, Zhong You, Yan Chen
Summary: This study investigated the tensile behavior of a non-rigid square-twist origami structure and established a relationship between its deformation and energy, force, and stiffness curves. An empirical model was developed to predict and tune the mechanical properties of the structure based on its parameters.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Aerospace
Zhong Zhang, Nan Zhang, Yifei Jiao, Hexi Baoyin, Junfeng Li
Summary: This article describes a method for multisatellite responsiveness scheduling, using orbital maneuvering to observe multiple ground targets, improving disaster risk evaluation and relief effectiveness, and achieving better performance than the previous best method in a typical scenario.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Astronomy & Astrophysics
Mor Rozner, Dimitri Veras, Hagai B. Perets
Summary: The study explores the role of aeolian erosion in the evolution of solids in white dwarf debris discs, showing that it can play an important role in shaping planetesimals and boulders of different sizes. Aeolian erosion is found to be the dominant destructive process for smaller objects within a certain range from the white dwarf, linking fragmentational collisions with sublimation and Poynting-Robertson drag to create polluted white dwarfs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Philipp Baumeister, Nicola Tosi
Summary: In this study, a machine-learning model called ExoMDN is introduced for characterizing the interior structure of exoplanets. By providing mass, radius, and equilibrium temperature, the model can predict full posterior distributions of mass fractions and thicknesses of each planetary layer in less than a second. The model is applied to characterize the interiors of confirmed exoplanets and discuss the potential use of the fluid Love number k(2) as an additional observable to reduce degeneracy in interior structures.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Physics, Multidisciplinary
Cesar Antonio Rodriguez Gonzalez, Julio Jose Caparros-Mancera, Jose Antonio Hernandez-Torres, Angel Mariano Rodriguez-Perez
Summary: This paper explains the mathematical foundations of a method for modelling semi-rigid unions using rotational springs. It also introduces the implementation steps and provides examples to demonstrate the efficacy of the design process for semi-rigid joints.
Article
Astronomy & Astrophysics
Brianna Zawadzki, Daniel Carrera, Eric B. Ford
Summary: The presence of a gas disc reduces the final number of planets formed around M dwarf stars and causes inward migration of planets. Some planetary systems may experience their final giant impact inside a gas disc.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
J-M Hure
Summary: This article discusses the equilibrium conditions for a body made of two homogeneous components separated by oblate spheroidal surfaces and in relative motion. Exact solutions are not allowed for rigid rotation unless a specific ambient pressure is present, but approximations can be obtained for configurations involving a small confocal parameter. The problem has two families of solutions, depending on the pressure along the common interface. The analytical approach compares well with numerical solutions obtained from the self-consistent-field method and practical formulas are derived for slowly rotating star/planet interiors.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Jiabin Shen, Jun Xu, Lei He, Yani Ouyang, Lin Huang, Wanmei Li, Qing Zhu, Pengfei Zhang
Summary: This study demonstrates a photoinduced rapid multicomponent cascade reaction of aryldiazonium salts with unactivated alkenes and trimethylsilyl azide under oxidant-free conditions, providing a synthetic route for a wide range of unsymmetric azo compounds. The compounds are obtained in good to excellent yields under mild reaction conditions. The control experiment confirms the reaction mechanism follows a radical pathway.
