Article
Mathematics, Applied
Anton Doroshin
Summary: A new principle and linked schemes of reaction/momentum wheels unloading are proposed, which involve releasing additional degrees of freedom and reconfiguring the internal mechanical multi-rotor subsystem to change the relative angular momentum.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Automation & Control Systems
Somayeh Jamshidi, Mehdi Mirzaei, Maryam Malekzadeh
Summary: This paper investigates the attitude control of a spacecraft simulator in the presence of nonlinearities, uncertainties, and system constraints. An optimization-based controller is developed by predicting the spacecraft system's nonlinear responses. The control method considers the limitations in torques applied to reaction wheels and the restrictions in angular momentum due to limited rotational speed. The constrained stability is analyzed using the Lyapunov method, and the system response is bounded in terms of prediction time. The performance of the proposed controllers is evaluated through computer simulations and hardware-in-the-loop experiments, demonstrating good performance in realistic conditions.
Article
Engineering, Aerospace
Andrea Colagrossi
Summary: Autonomous spacecraft operations enable space missions that would not be viable only with ground control. One routine operation that most spacecraft must perform is stored angular momentum management. This paper presents the magnetic management of stored angular momentum, integrated with the main attitude control system, for autonomous spacecraft. The performance of an example attitude control system with four reaction wheels and three magnetic torquers is presented and discussed.
Article
Engineering, Aerospace
Massimo Posani, Mauro Pontani, Paolo Gasbarri
Summary: This paper investigates the task of reorientation maneuvers for large satellites. Using numerical simulations and a nonlinear attitude control algorithm, the slewing maneuver is successfully completed with minimal elastic displacements caused by the rotation of the solar panels.
Article
Automation & Control Systems
Maria Khodaverdian, Maryam Malekzadeh
Summary: Two dual-loop control methods are proposed for attitude control and reaction wheels momentum management of spacecraft simulator. The first method uses optimal controller in the inner loop based on the high accuracy and constrained features of MPC. The second method incorporates MPC in the exterior loop and finite-time TSM in the interior loop for better dynamic performance and robustness.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Milad Alipour, Maryam Malekzadeh, Alireza Ariaei
Summary: In this study, a new adaptive fractional-order nonsingular terminal sliding mode controller is proposed. It utilizes a novel multi-purpose sliding surface to achieve attitude control of the spacecraft. The stability of the closed-loop system is investigated, and the performance of the controller is compared with other controllers. The effectiveness of the proposed controller is validated through practical experiments.
Article
Engineering, Aerospace
Sebastian Grau, Sascha Kapitola, Sascha Weiss, Daniel Noack
Summary: Technische Universitat Berlin (TU Berlin) introduced a space-rated fluid-dynamic actuator (FDA) on the TechnoSat mission in 2017 and BEESAT-9 in 2019, enabling novel modes of spacecraft operation. These modes include artificially increasing swath width and acquiring stereo images of ground targets. Crucial to these operations is the proper allocation of control between different actuators.
Article
Engineering, Aerospace
Mohammed A. A. Desouky, Ossama Abdelkhalik
Summary: This paper focuses on magnetic attitude control of spacecraft and proposes an approach to increase the duty cycle of magnetic rods while reducing the rate of collecting magnetometer data, leading to reduced maneuver time and power consumption. The effectiveness of the method is verified through Monte Carlo simulations and data collected from the CASSIOPE spacecraft.
Article
Multidisciplinary Sciences
Somayeh Jamshidi, Mehdi Mirzaei, Maryam Malekzadeh
Summary: In this paper, an optimal nonlinear attitude controller is designed and implemented as hardware in the loop for a spacecraft simulator under various failures of reaction wheels. The controller is developed in the closed form based on predicting the nonlinear continuous responses of the spacecraft simulator. The stability of the controller in the presence of parametric uncertainties and unmodeled dynamics of the platform is analyzed, and the effect of prediction time on the boundedness of system responses is presented. A redundant reaction wheel is used to compensate for failures of three main reaction wheels, and the distribution of torque between healthy wheels under different types of failure is addressed and experimentally implemented. The laboratory results show the accuracy and validity of the designed controller in converging the spacecraft attitude in a limited time in the presence of uncertainties and failures.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Lu Chen, Wenqi Zhu, Pengcheng Huo, Junyeob Song, Henri J. Lezec, Ting Xu, Amit Agrawal
Summary: Researchers have proposed a flexible approach to synthesize ultrafast optical transients with arbitrary control over its complete spatiotemporal evolution by leveraging the multifunctional control of light at the nanoscale. This method supports an ultrawide bandwidth with high spectral and spatial resolution, enabling the synthesis of complex states of structured space-time wave packets.
Article
Engineering, Aerospace
Bin Li, Yang Wang, Kai Zhang, Guang-Ren Duan
Summary: This article introduces a potential function and feedback control law to address spacecraft reorientation problem under various constraints, optimizing controller gains using a gradient-based method to ensure stability, and satisfying angular velocity and actuator constraints. Numerical simulations demonstrate accurate repointing maneuvering under different types of constraints.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2021)
Article
Engineering, Aerospace
Koki Kimura, Yasuhiro Shoji, Satoshi Satoh, Katsuhiko Yamada
Summary: This paper proposes a control law for spin spacecraft systems that provides feedback control for spin rate and spin axis orientation. The performance of the control law is evaluated through experiments and compared with numerical simulation results. The results show that the control law can appropriately control the spin motion of the spacecraft.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Automation & Control Systems
Xuhui Lu, Yingmin Jia, Yongling Fu, Fumitoshi Matsuno
Summary: This article studies the appointed-time attitude tracking control of the spacecraft on the special orthogonal group, considering the attitude forbidden zone, parameter uncertainties, and external disturbances. A novel projection function and reduced dimensional vector are proposed, and a set of control schemes is constructed to ensure both attitude constraint and appointed-time control performance.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Engineering, Aerospace
Dong Ye, An-Min Zou, Zhaowei Sun
Summary: In this article, a predefined-time predefined-bounded attitude tracking control scheme is proposed for rigid spacecraft with bounded external disturbances. The proposed control law can drive the attitude tracking errors to a predefined-bounded region within a predefined time, independently of initial conditions. The continuous nature of the controller ensures stability.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Yan Xiao, Anton de Ruiter, Dong Ye, Zhaowei Sun
Summary: This article investigates attitude coordination control for flexible spacecraft formation flying under the condition that only a subset of the followers have access to a common reference attitude. It addresses measurement errors, immeasurable flexible modal variables, external disturbances, and model uncertainties in both rigid and flexible dynamics concurrently. Based on the sequential Lyapunov method, the proposed distributed attitude coordination controller can obtain successively less conservative attitude coordination performance bounds.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2023)
Article
Engineering, Aerospace
Giulio Avanzini, Emanuele L. de Angelis, Fabrizio Giulietti
Summary: This study provides a simple guidance for preliminary sizing of rovers designed for extraterrestrial surface missions, focusing on the performance of electrically-driven ground vehicles powered by battery packs, particularly in terms of energy-efficient locomotion. Analytical models and experimental validations suggest that analyzing mobility performance of ground vehicles can be effectively done by considering cruise distance estimation and various influencing factors.
Article
Engineering, Aerospace
Giulio Avanzini, Emanuele L. de Angelis, Fabrizio Giulietti
Summary: The study explores the challenging problem of spacecraft attitude stabilization based on active magnetic actuators, proposing a novel magnetic controller for achieving three-axis stabilization on a prescribed attitude. Numerical simulations demonstrate the robustness of the control technique against environmental disturbances and parameter uncertainties.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Giulio Avanzini, Emanuele Luigi de Angelis, Fabrizio Giulietti
Summary: This article proposes an analytical framework for investigating the cruise performance of conventional helicopter configurations, considering turbine- and battery-powered rotorcraft. The study shows that analyzing two reference helicopters can lead to the identification of an energy-efficient cruise flight strategy.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Engineering, Aerospace
Giulio Avanzini, Alessandro Zavoli, Guido De Matteis, Fabrizio Giulietti
Summary: This paper addresses the problem of aiming a generic body-fixed axis along an inertially fixed direction for an underactuated spacecraft. The feasibility of the desired pointing is analyzed and a closed-form solution for the corresponding attitude is derived. A nonlinear controller is developed using singular perturbation theory, and the convergence to the desired attitude is proved under specific conditions.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Francesco Nicassio, Daniele Fattizzo, Michele Giannuzzi, Gennaro Scarselli, Giulio Avanzini
Summary: This paper proposes a technique for deriving a low-order model of a large deformable space vehicle resembling the International Space Station. The approach combines a hybrid Newtonian-Lagrangian method with Galerkin and assumed modes methods to model both rotational and deformation dynamics. The control moment gyroscopes are considered as the actuator for attitude control. Open- and closed-loop maneuvers are used to analyze the coupling between rotational and deformation degrees of freedom.
Article
Engineering, Aerospace
Emanuele L. de Angelis, Fabrizio Giulietti
Summary: This paper presents a fully-analytical framework to analyze the effects of cable-suspended loads on multirotor platforms. The dynamics of an isolated vehicle with the complete model of the electric propulsion system is investigated, as well as the load suspended through a linear-elastic cable. An auxiliary controller is proposed to provide the slung-load system with a closed-loop desired behavior and stabilize load oscillations. Closed-form equations are derived to design the auxiliary controller gains based on a limited set of parameters. A test case is proposed using a commercial-off-the-shelf hexarotor with a characterized electric propulsion system. (c) 2023 Elsevier Masson SAS. All rights reserved.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Remote Sensing
Emanuele Luigi de Angelis, Fabrizio Giulietti, Gianluca Rossetti, Matteo Turci, Chiara Albertazzi
Summary: Light helicopters have applications in the private and public sectors for their agility and storage capabilities. However, most current models date back to the 1980s and require advanced design methods for safety improvements. The DISRUPT project aims to develop a new ultralight helicopter with a ballistic parachute, and the process of transforming it into an unmanned vehicle is detailed in this paper. Results show the feasibility of using the helicopter as a remotely-piloted vehicle and as a transportation system for smart and sustainable air mobility.
Article
Remote Sensing
Emanuele Luigi de Angelis, Fabrizio Giulietti
Summary: This study proposes a method to estimate the swing state of a suspended payload in multirotor drone delivery scenarios. A recursive algorithm is developed to estimate cable swing angle and rate from acceleration measurements without the need for extra sensors. The proposed approach allows for improved estimation accuracy in both stationary and maneuvering flight, and the filter performance is enhanced by considering aerodynamic disturbance force.
Article
Engineering, Aerospace
A. I. Krikunova, A. D. Cheshko, V. V. Krivets
Summary: Fire safety is crucial for the development of efficient and safe energy systems for space objects. This paper focuses on studying the influence of gravity on combustion processes and analyzes the dynamics of inverted conical methane-air flame under external acoustic excitation. The results show that at high excitation frequencies, the intensity of vortex generation is similar to that observed in experiments with normal gravity, indicating the dominance of acoustic mechanism. Additionally, at an external excitation frequency of 240 Hz, significant growth in shear vortex diameters and increased amplitude of perpendicular oscillations of flame branches were observed, indicating the most intensive large scale instability of flow.
Article
Engineering, Aerospace
Liya Huang, Mingquan Gong, Jiarui Zhang, Kun Liang, He Yang
Summary: Metallized gel propellants with exceptional stability and remarkable shear-thinning properties were successfully synthesized by utilizing cooperative hydrogen bonding between polymer octanoyl cellulose and the small Thixatrol ST molecule.
Article
Engineering, Aerospace
Clemence Poirier, Michelle Hermes, Marco Aliberti
Summary: This paper examines the role of space-based data in European climate policies and assesses the barriers to the use of space technology in climate policymaking in European countries. The research findings indicate that while satellite data is crucial for scientific research and climate policies, the role of space is not accurately reflected in European climate policies.
Article
Engineering, Aerospace
Yan-mei Zhou, Ji-ping Wu, Wei Huang, Gautam Choubey
Summary: This study investigates the combustion performance of sinusoidal pulsed jets in supersonic flows using numerical simulations. It is found that the pulsed jets can significantly improve combustion efficiency.
Article
Engineering, Aerospace
Wang Zhao, Shujun Tan, Yiliang Guo
Summary: This study proposes an adaptive Pogo active suppression controller design method that utilizes measured acceleration as feedback. The eigenspace transformation theory is employed to design dimensional reduced models for observer and adaptive controller, effectively addressing the issues of model parameter uncertainty and time-varying parameters. Simulation analysis of a certain type of rocket demonstrates the effectiveness of the proposed method.
Article
Engineering, Aerospace
A. V. Nebylov, V. A. Nebylov
Summary: This article discusses the safety issues of astronauts during the landing process and investigates how rescuers can effectively carry out rescue missions. The article also takes into account the special maritime conditions of the Vostochny cosmodrome.
Article
Engineering, Aerospace
Pietro Davide Maddio, Rosario Sinatra, Alberto Meschini, Riccardo Rigato, Marco Lapi, Davide Scarozza, Alessandro Cammarata
Summary: This study aims to develop a versatile cable net generation algorithm for designing offset cable nets in parabolic reflectors. The study proposes a methodology that leverages quasi-geodesic curves and introduces two types of these curves. The study also presents various solutions for different cable net layouts and introduces a quality index based on an equilateral triangle cable net.
Article
Engineering, Aerospace
Nahum Melamed, Tom Heinsheimer
Summary: Traditional methods of asteroid trajectory modification rely on impact or nuclear detonation, while centrifugal propulsion offers an alternative approach. The centrifuge system lands on the asteroid and gradually adjusts the trajectory using momentum transfer. This method allows for flexibility in operation parameters and has the potential to be used in planetary defense and other space missions.
Article
Engineering, Aerospace
Andrew Barth, Ou Ma
Summary: As humans continue to explore the surfaces of the Moon and Mars, the use of distributed heterogeneous robot teams can increase the chances of success by utilizing the complementary capabilities and synergy of the team members. Effective cooperation and collaboration between the members of a robot team is crucial, but defining a metric for effective cooperation is challenging. This paper presents a method for determining reward criteria that can be used for training robot swarm through reinforcement learning techniques. The trained robot team exhibits high success rates and cooperative behavior in test environments, demonstrating the robustness and scalability of the training strategies.
Article
Engineering, Aerospace
Kaijie Zhu, Qiquan Quan, Dewei Tang, Yachao Dong, Kaiyi Wang, Bo Tang, Qi Wu, Zongquan Deng
Summary: This study proposes a deployable Mars quadcopter for air patrol and sampling missions. By describing its structure, avionics architecture, and autonomous flight control method, it provides a feasible framework for future Mars flight sampling missions.
Article
Engineering, Aerospace
Avishai Melamed, Adi Rao, Sarah Kreps, Erika Palmer
Article
Engineering, Aerospace
Colin Hunter, Avinkrishnan Vijayachandran, Anthony M. Waas
Summary: Deployable structures inspired by origami have gained significant prominence in space applications. Recent advancements in multi-material additive manufacturing have opened new possibilities for the fabrication of monolithic structures. This paper presents a novel framework for designing deployable structures using viscoelastic hinges incorporated into rigid plates. Experimental results demonstrate the effectiveness and feasibility of these hinge designs in real-world applications.
Article
Engineering, Aerospace
Aleksander V. Efremov, Mikhail S. Tiaglik, Aleksey S. Tiaglik, Iliyas Kh Irgaleev, Tatyana V. Voronka
Summary: Theoretical and experimental studies were conducted to determine the best kind of information presented on a predictive display for the highest accuracy in space mission execution, while considering reduced propellant consumption.
Article
Engineering, Aerospace
Fuwen Liang, Long Miao, Feng Tian, Jiahui Song, Ningfei Wang, Xiao Hou
Summary: This study investigates the influence of deployment friction on the dynamic characteristics of nonconductive space tether through experimental measurement and numerical simulation. The results show that deployment friction significantly limits the uncontrolled tether deployment, while increasing the initial deployment velocity and satellite effective mass, as well as decreasing orbital altitude, can enhance the deployment capability and dynamic stability. In addition, an optimal matching relationship between tether length and satellite total mass is proposed, which is of substantial importance for the design of nonconductive space tether systems.
Article
Engineering, Aerospace
Amirah R. Algethami, Colin R. McInnes, Matteo Ceriotti
Summary: This paper utilizes the Hill's approximation model to manipulate the relative motion of two asteroids by three impulses, resulting in their bound binary motion in Earth's orbit. The feasibility of this strategy is demonstrated, and potential applications for parking small captured near-Earth asteroids in Earth's orbit are discussed.
