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Precise control of a magnetically suspended double-gimbal control moment gyroscope using differential geometry decoupling method

Xiaocen Chen, Maoyin Chen
2013 Chinese Journal of Aeronautics  
This paper proposes a novel linearization and decoupling method based on differential geometry theory and combines it with the internal model controller (IMC) to guarantee the system robustness to the  ...  Furthermore, by introducing the dynamic compensation for the inner-gimbal rate-servo system and the magnetically suspended rotor (MSR) system only, we can eliminate the influence of the unmodeled dynamics  ...  Zhou from Tsinghua University and Dr. Y. Ren from Beihang University for many valuable suggestions and instructive comments.  ... 
doi:10.1016/j.cja.2013.06.010 fatcat:relgffwodfasxj3kiygjtmb6a4

Anti-disturbance Control Based on Cascade ESO and Sliding Mode Control for Gimbal System of Double Gimbal CMG

Haitao Li, Jiangkun Yu
2019 IEEE Access  
Disturbance torque and unmodeled dynamics are the main important factors which affect the angular velocity precision of a gimbal system in double gimbal control moment gyro (DGCMG).  ...  Simulation and experimental results show that the proposed control method not only improves the compensation performance of the gimbal system with external disturbances, but also enhances the robustness  ...  In [8] , a method that combines time delay control with internal model control was proposed to compensate the nonlinear friction torque of gimbal system.  ... 
doi:10.1109/access.2019.2963079 fatcat:zn4wk6tqundlhlbl2fi5phaizq

High-Precision Speed Control Based on Multiple Phase-Shift Resonant Controllers for Gimbal System in MSCMG

Jian Feng, Qing Wang, Kun Liu
2018 Energies  
Methods based on time delay control and internal model control [9] and methods based on a cascade extended state observer [10] are presented for the friction compensation of gimbal servo systems in double  ...  A model-free control method with an elasto-plastic friction observer is proposed in [7] and an adaptive friction compensation scheme is proposed in [8] .  ...  Author Contributions: Jian Feng conceived, designed and wrote this paper. Jian Feng and Qing Wang designed and conducted the experiments. Jian Feng and Kun Liu set up the experiments.  ... 
doi:10.3390/en11010032 fatcat:vuh5tbpysfa3xiwjeoe2oue2pm

Learning-Based Control Compensation for Multi-Axis Gimbal Systems Using Inverse and Forward Dynamics [article]

Damla Leblebicioğlu and Ozgur Atesoglu and Anil E. Derinoz and Melih Cakmakci
2021 arXiv   pre-print
This paper concentrates on the modeling and control of a multi-axis gimbal system.  ...  A disturbance compensator based on multilayer perceptron (MLP) structure is implemented to cope with external and internal disturbances and parameter uncertainties through the torque input channel.  ...  Li, “Friction Compensation Based on 1012, 2019. Time-Delay Control and Internal Model Control for a Gimbal System in [16] Y. Chen, H.  ... 
arXiv:2112.02561v1 fatcat:fimgkqhaxreuvamh6tg6ra2i54

Recent Literature On Experimental Structural Dynamics And Control Research [chapter]

1990 Mechanics And Control Of Large Flexible Structures  
Acknowledgments I am very grateful to the many researchers who sent me literature and to the U.S. Air Force Academy for providing the resources required for this endeavor.  ...  Reference 89 also describes a method to accoi'nt for the time delay introduced by digital processing of the control algorithm.  ...  system consisting primarily of a grounded laser source, a mirror, and a two-axis laser detector fixed to one of the tip appendages, and a mirror actuated by a two-axis gimbal assembly mounted on a base  ... 
doi:10.2514/5.9781600866029.0465.0489 fatcat:tuqgczv2ebbglm6orebsh4joee

Sixth aerospace mechanisms symposium

1971 Journal of Mechanisms  
Data are presented showing the performance of these mechanisms before and after operation for one lunar day and storage for 2-1/2 years on the surface of the moon. An analysis of the critica!  ...  Rice' 158 33.00 The symposium includes presentation of both succe88es and failures in the design and development of mechaniis for spacecraft.  ...  Harrison (systems), M. Peterssen (electronics), B. Barnes (packaging), and G. Weed (gimbal assembly design).  ... 
doi:10.1016/0022-2569(71)90025-5 fatcat:iznya3slufeltdcyaertndg6au

Elimination of Harmonic Force and Torque in Active Magnetic Bearing Systems with Repetitive Control and Notch Filters

Xiangbo Xu, Shao Chen, Jinhao Liu
2017 Sensors  
To eliminate the harmonic force and torque, a novel control method based on repetitive control and notch filters is proposed.  ...  Firstly, the dynamics of a four radial degrees of freedom AMB system is described, and the AMB model can be described in terms of the translational and rotational motions, respectively.  ...  The CMG consists of a high-speed rotor mounted on a gimbal, which is fixed in the spacecraft platform [2] .  ... 
doi:10.3390/s17040763 pmid:28375189 pmcid:PMC5421723 fatcat:3fnfk5ibpfbvzbac6objuzmpmm

Attitude Dynamics and Control of Satellites With Fluid Ring Actuators

Nona A. Nobari, Arun K. Misra
2012 Journal of Guidance Control and Dynamics  
Modeling the attitude dynamics and developing a controller to stabilize the attitude motion are quite important steps in the design of satellites.  ...  By now, not only he is my professional role-model for his knowledge, but also for his kind treatment. Indeed, his patience and kindness softened the difficult days of PhD studies.  ...  The reason for this difference lies in the Coulomb friction forces existing inside the pump and also the time delay in the communication of the control input.  ... 
doi:10.2514/1.54599 fatcat:624khm4x3vdzdi7armxzgxys2i

Event-based LQR with integral action

S. Durand, B. Boisseau, J.J. Martinez-Molina, N. Marchand, T. Raharijaona
2014 Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)  
In this paper, a state-feedback linear-quadratic regulator (LQR) is proposed for event-based control of a linear system.  ...  The whole proposal is tested on a real-time system (a gyroscope) in order to highlight its ability, the reduction of control updates and the respect to the actuator limits.  ...  These devices are generally called control momentum gyroscopes (CMG) and have been a topic of prime interest in control theory. A.  ... 
doi:10.1109/etfa.2014.7005067 dblp:conf/etfa/DurandBMMR14 fatcat:2lizkqog3bf2rp2uf7zy4vw5qe

Vibration isolation and suppression system for precision payloads in space

Richard G Cobb, Jeanne M Sullivan, Alok Das, L Porter Davis, T Tupper Hyde, Torey Davis, Zahidul H Rahman, John T Spanos
1999 Smart materials and structures (Print)  
The passive isolation is provided using a flight proven D-strut design. The passive design is supplemented by a voice coil based active system.  ...  VISS utilizes six hybrid isolation struts in a hexapod configuration. Central to the concept is a novel hybrid actuation concept which provides both passive isolation and active damping.  ...  We would like to thank Dr John Stubstad and Mr Phillip Mace for their support and contributions.  ... 
doi:10.1088/0964-1726/8/6/309 fatcat:jeda7iocvzci3hut76jdxrgwha

The Origins Space Telescope (OST) Mission Concept Study Interim Report [article]

The OST mission concept study team
2018 arXiv   pre-print
OST's Mission Concept 1, the subject of this report, features a cold (4 K) large-aperture telescope (9.1 m) and five powerful instruments, providing imaging and spectroscopy over a wavelength range from  ...  OST's dramatic increase in sensitivity over previous missions ensures breakthrough discoveries in a broad range of astrophysics disciplines.  ...  In conjunction with the CMGs, the field steering mirror (FSM) is used to provide fine control of the optical line of sight and to provide some rejection of internal disturbances.  ... 
arXiv:1809.09702v1 fatcat:mchsxu2sjzczpnrafpqwnfukum

Performance and Micro-Vibrations in Magnetic Bearings for Space Actuators

Guzmán Borque Gallego
2021
a contact-and friction-less operation with virtually infinite life-time.  ...  The main goal of this thesis is to identify the key factors and characteristics of a magnetic bearing system, for its use in reaction wheels for attitude control of satellites, in terms of requirements  ...  I would also like to express my sincere gratitude to ESA's René Seiler for his technical support, knowledge and motivation to pursue this work, and in general to all the Mechanisms Section for their warm  ... 
doi:10.5075/epfl-thesis-8425 fatcat:zlciewop5fbajcwqoirlfhz2ku