Rigid Body Satellite Time-Optimal Attitude Control Using Inversion PDF Download
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Author: Kaushik Basu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Spacecraft missions with requirements for tighter tolerances and that take advantage of improvingcomputational technology, and having more stringent control requirements, including time optimalsolutions are required.An inverse-dynamics method is used in conjunction with a particle swarm algorithm to findnear-minimum time reorientation maneuvers in the presence of path constraints. The methodemploys a quaternion formulation of the kinematics, using B-splines to represent the quaternions.The inverse particle swarm optimization provides a method to determine an initial starting point fora more accurate algorithm that uses a gradient-based method. The inverse method provides certainadvantages in this problem over other methods such as enforcement of boundary conditions and theincrease of computational efficiency by avoiding the use of numerical integrators.Once the technique is established, parallelization of the algorithm demonstrates the potential forflight hardware to be implemented that will aid in performing near real-time solutions. In total thesuperior terminating kinematic results and speed up of computing time from hours to just severalseconds will allow the implementation using space hardened Graphic Processor Units and FieldProgrammable Gate Arrays to perform autonomous guidance and navigation.
Author: Kaushik Basu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Spacecraft missions with requirements for tighter tolerances and that take advantage of improvingcomputational technology, and having more stringent control requirements, including time optimalsolutions are required.An inverse-dynamics method is used in conjunction with a particle swarm algorithm to findnear-minimum time reorientation maneuvers in the presence of path constraints. The methodemploys a quaternion formulation of the kinematics, using B-splines to represent the quaternions.The inverse particle swarm optimization provides a method to determine an initial starting point fora more accurate algorithm that uses a gradient-based method. The inverse method provides certainadvantages in this problem over other methods such as enforcement of boundary conditions and theincrease of computational efficiency by avoiding the use of numerical integrators.Once the technique is established, parallelization of the algorithm demonstrates the potential forflight hardware to be implemented that will aid in performing near real-time solutions. In total thesuperior terminating kinematic results and speed up of computing time from hours to just severalseconds will allow the implementation using space hardened Graphic Processor Units and FieldProgrammable Gate Arrays to perform autonomous guidance and navigation.
Author: Bing Xiao
Publisher: Springer Nature
ISBN: 9819728479
Category :
Languages : en
Pages : 273
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Book Description
Author: Michael Nino
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Being able to quickly reorient certain satellites, such as orbiting astronomical observatories, is critical to mission objectives. If an event of interest occurs, the goal is to measure that event before it disappears. This can be difficult when the path of reorientation between the sensor and the event is constrained. An electromagnetic (EM) sensor is designed to record EM radiation within certain intensity tolerances. Celestial bodies, such as the Earth, Moon, and Sun, can output EM radiation well above those tolerances depending on the objective ofthe satellite. This requires that the sensor not only be reoriented from its current pointing to the direction of the event, but also avoid the EM output of those bodies in the range that exceeds the tolerances of the sensor. This leads to an optimal control problem that needs to be solved computationally. For a rigid body satellite with three-axis control capabilities, the use of Eulers rotation equations can lead to different attitude parameterizations, such as the use of a quaternion representation or Rodrigues parameters, to solve the system of equations. In this thesis, an inverse-dynamics representation is used, which involves parameterizing the attitude of the satellite into three separate orientation angles constituting the 3-2-1 Euler angle sequence. This is converted to a quaternion formulation to achieve compatibility with on board satellite control systems. Genetic algorithms,also called hybrid or heuristic methods, provide a framework for solving optimal control problems quickly. Particle Swarm Optimization (PSO) is a method that invokes a relationship between a particle (a single solution element) and a swarm (a group of solution elements) to search the solution space for an optimal solution.Combining PSO and inverse-dynamics has been shown in previous analyses to be a contender for a way to produce solutions to the reorientation problem efficiently. The method in this analysis determined to be the best contender for producing real-time solutions to this problem involves modeling the orientation angles of theinverse-dynamics problem using 5th order polynomials that exactly meet the end point conditions of the problem. Using a normalized time unit, a relationship between the control profile and the final time can be used to determine a final time that guarantees the constraints associated with the satellites design. This allowsPSO to address just the maneuver path that avoids the constraint bodies. This implementation was found to consistently produce results that are both closer to optimality and more computationally efficient than those in the literature.
Author: Yuanqing Xia
Publisher: Springer
ISBN: 3642368417
Category : Technology & Engineering
Languages : en
Pages : 270
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Book Description
“Compound Control Methodology for Flight Vehicles” focuses on new control methods for flight vehicles. In this monograph, the concept of compound control is introduced. It is demonstrated that both Sliding Mode Control (SMC) and Active Disturbance Rejection Control (ADRC) have their own advantages and limitations, i.e., chattering of SMC and the observability of extended state observer (ESO), respectively. It is shown that compound control combines their advantages and improves the performance of the closed-loop systems. The book is self-contained, providing sufficient mathematical foundations for understanding the contents of each chapter. It will be of significant interest to scientists and engineers engaged in the field of flight vehicle control.
Author: Timothy Sands
Publisher: BoD – Books on Demand
ISBN: 1789848024
Category : Science
Languages : en
Pages : 286
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Book Description
Spacecraft attitude maneuvers comply with Euler's moment equations, a set of three nonlinear, coupled differential equations. Nonlinearities complicate the mathematical treatment of the seemingly simple action of rotating, and these complications lead to a robust lineage of research. This book is meant for basic scientifically inclined readers, and commences with a chapter on the basics of spaceflight and leverages this remediation to reveal very advanced topics to new spaceflight enthusiasts. The topics learned from reading this text will prepare students and faculties to investigate interesting spaceflight problems in an era where cube satellites have made such investigations attainable by even small universities. It is the fondest hope of the editor and authors that readers enjoy this book.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Author:
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Category : Aeronautics
Languages : en
Pages : 704
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Author: Holm Altenbach
Publisher: Springer Nature
ISBN: 3030758907
Category : Science
Languages : en
Pages : 476
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This book covers different topics of nonlinear mechanics in complex structures, such as the appearance of new nonlinear phenomena and the behavior of finite-dimensional and distributed nonlinear systems, including numerous systems directly connected with important technological problems.
Author:
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 368
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Author:
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 280
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Book Description
