A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Filters
Precise control of a magnetically suspended double-gimbal control moment gyroscope using differential geometry decoupling method
2013
Chinese Journal of Aeronautics
Preserved Fulltext
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
2019
IEEE Access
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
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
2018
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
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]
2021
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
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
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
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
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
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
2017
Sensors
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
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
2012
Journal of Guidance Control and Dynamics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
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
2014
Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
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
1999
Smart materials and structures (Print)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
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]
2018
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
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
2021
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
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