by National Aeronautics and Space Administration, Langley Research Center in Hampton, Va .
Written in English
|Statement||Axel Schenk and Richard S. Pappa.|
|Series||NASA technical memorandum -- 102720.|
|Contributions||Pappa, Richard S., Langley Research Center.|
|The Physical Object|
NASA Technical Memorandum MODAL IDENTIFICATION OF A DEPLOYABLE SPACE TRUSS Axel Schenk and Richard S. Pappa September NASA National Aeronautics and Space Administration Langley. Mini-Mast is a meter long deployable space truss used for structural dynamics and active vibration-control research at the NASA Langley Research Center. Due to nonlinearities and numerous local modes, modal idenfification of Mini-Mast proved to be surprisingly : A. Schenk and R. S. Pappa. Mini-Mast is a meter-long deployable space truss used for structural dynamics and active-vibration control research at the NASA Langley Research Center. Due to nonlinearities and numerous local modes, modal identification of Mini-Mast proved to be surprisingly : Axel Schenk and Richard S. Pappa. Abstract. With large spatial deployable antennas used more widely, the stability of deployable antennas is attracting more attention. The form of the support structure is an important factor of the antenna’s natural frequency, which is essential to study to prevent the resonance. The deployable truss structures based on shape memory polymer Cited by:
The present work focuses on the vibration modal experiments and the modal interactions of the ring-truss structure for the large space deployable antenna. The concept design of the large space deployable antenna is introduced briefly. The components and the deployable mechanism are presented for the large space deployable : B. Siriguleng, W. Zhang, T. Liu, Y.Z. Liu. Kinematic structural synthesis has been relatively successful when applied to the conceptual design of mechanisms. The approach presented in this paper, however, views the design process from an initial standpoint of a truss by: Dynamic model of the large space deployable truss type mast is established. The first several natural frequencies, the vibration model shapes and the corresponding distribution of the longerons model strain energy are given based on the analysis of the modes of the truss type mast. Use the distribution of the longerons' model strain energy as an interpretational criterion to optimize actuator. The circular truss antenna of the large aperture is considered to be a flexible structure which may cause vibration in space and may affect its performance. The frequency analysis of the circular truss antenna is an important problem for understanding its vibration by: 3.
One of their key technologies is the design of deployable booms, in particular how to deploy and support the membrane structure. In this paper, a deployable sail with four triangular membranes supported by inflated booms enhanced by four self-supporting thin Cited by: 1. On-orbit identification experiments of structural modal parameters had been implemented on some spacecraft, 1,2 such as the Hubble Space Telescope (HST) 3 and Engineering Test Satellite (ETS) series. 4 –6 Currently, these identification experiments are all based on time-invariant systems. For example, when the on-orbit identification of the ETS-VI satellite was Cited by: 3. Vibration modal experiments and modal interactions of a large space deployable antenna with carbon fiber material and ring-truss structure Engineering Structures A Variational Approach to Dynamics of Flexible Multibody SystemsCited by: 6. Based on the characteristics of space truss structures, the concept of modal strain energy is introduced and square difference in elemental modal strain is presented. Through the square difference in elemental modal strain and wavelet transform, this paper presents a method for space truss structure damage recognition. The structural damage index is presented with the change of wavelet Cited by: 1.