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Showing 1 to 10 of 10 for “"large flexible structures"”.
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Application of control theory to large flexible structures using the Independent Modal-Space Control method
The control problem of a large-order flexible system in the form of a beam-lattice is presented using the Independent Modal-Space Control (IMSC) method. The method is based on a transformation of the system equations of motion to modal space, yielding internally independent modal equations of …
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Experimental verification and development of structural identification techniques on a grid
… deals with system identification methods for large flexible structures. Proposed space missions for the future include the deployment of large flexible structures, e.g., NASA's proposed space station. These structures must be controlled to maneuver the structure to desired locations and to …
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Wideband Active Vibration Control Synthesis and Implementation on Uncertain Resonant Structures
Large, ``rigid'' structures made of interconnecting beams and tendons represent a type of construction that has many engineering benefits. Lightweight, strong, and generally constructed of standard-shaped metal framework, they also incur significant challenges to control vibration. The construction …
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Design and fabrication of a test apparatus for lightweight flexible space modules for assembly
… will require the on-orbit construction of large structures, such as solar arrays and telescopes. Currently, on-orbit construction and maintenance work is primarily accomplished by astronauts, during extra-vehicular "space walks". These are expensive and pose risks to the astronauts' lives. …
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Maneuver and control of flexible spacecraft
… is concerned with the problem of slewing large flexible structures in space and simultaneously suppressing any vibrations. The equations of motion for a three-dimensional spacecraft undergoing large rigid-body maneuvers are derived. The elastic motions are assumed to remain in the linear …
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Modeling and control of flexible structures
… with some topics in the modeling and control of large flexible structures. In the finite element convergence toward the natural modes and frequencies of a structure, it is found that two mechanisms limiting the accuracy of higher modes are, first, a decrease in the number of active degrees of …
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Identification of linear structural models
… towards dynamic analysis and control of very large, flexible structures, the need for accurate knowledge of the properties of a structure in terms of the mass, damping, and stiffness matrices is of extreme importance. Typical problems associated with existing structural model identification …
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Modeling and Control of SPIDER Satellite Components
… technology is heading in the direction of ultra-large, lightweight structures deployable on orbit. Minimal structural mass translates into minimal launch costs, while increased satellite bus size translates into significant bandwidth improvement for both radar and optical applications. However, …
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Parameter identification and control of distributed-parameter systems
… of vibrating systems, with special emphasis on large flexible structures. However, these methods are applicable to any distributed-parameter system.
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Development and Applications of a Flat Triangular Element for Thin Laminated Shells
… accuracy of the formulation for both small and large rotation analysis of laminated plates and shells. The results are compared with those available in the existing literature and those obtained using the commercial finite element package ABAQUS and are found to be in good agreement. The element …