VIBRATION CHARACTERISTICS SIMULATION OF WRINKLED CIRCULAR ANNULUS-SHAPED GOSSAMER SPACE STRUCTURE

2008 ◽  
Vol 05 (01) ◽  
pp. 189-198 ◽  
Author(s):  
CHANGGUO WANG ◽  
XINGWEN DU ◽  
XIAODONG HE ◽  
GUOZHI SONG
Keyword(s):  
Structural Design ◽  
Membrane Structure ◽  
Space Structure ◽  
Vibration Characteristics ◽  
Structural Vibration ◽  
Space Structures ◽  
Deformation State ◽  
Wrinkling Analysis ◽  
Wrinkled Membrane ◽  
And Control

Ultra-lightweight Gossamer space structures have received the wide attention due to their small packaging volume and low launching cost. Since wrinkles are a common deformation state and the main failure mode of such structures and vibration behaviors are the major factor of the structural design and control, a better understanding of the wrinkling characteristics and the vibration behaviors of the wrinkled membrane structure is thus very essential and desirable. In this paper, a modal analysis method incorporating the wrinkling analysis is presented to simulate the vibration characteristics of a wrinkled membrane structure. The effects of the wrinkles on the structural vibration behaviors are also summarized in detail in the end.

Decentralized adaptive fuzzy vibration control of smart gossamer space structure

2017 ◽  
Vol 28 (12) ◽  
pp. 1670-1681 ◽  
Author(s):  
Rui Xu ◽  
DongXu Li ◽  
Jianping Jiang ◽  
Jie Zou
Keyword(s):  
Fuzzy Control ◽  
Vibration Control ◽  
Membrane Structure ◽  
Control Method ◽  
Adaptive Fuzzy Control ◽  
Experimental System ◽  
Space Structure ◽  
Space Structures ◽  
Adaptive Fuzzy ◽  
Structure Vibration

Gossamer space structures technology have gained widely applications in space missions. However, the vibration problem is a great challenge which makes the technology complicated. The overall motivation of this work is to develop a vibration control system for gossamer space structures. In this study, a space membrane structure with piezoelectric stack actuators bracketed on its support frame is considered. First, the description of the smart space membrane structure and its dynamic model are presented. Then, a decentralized adaptive fuzzy control method is developed to control the structure vibration. Finally, experimental system is built up, and two vibration control experiment cases are carried out to verify the proposed control method. Experimental results demonstrate that the proposed control method is more effective than the fuzzy control method.

Control-Structure Integrated Design of Flexible Spacecraft Using MOEA/D

2013 ◽  
Vol 651 ◽  
pp. 619-624
Author(s):  
Zhi Wei Feng ◽  
Qing Bin Zhang ◽  
Qian Gang Tang
Keyword(s):  
Interaction Design ◽  
Control Structure ◽  
Integrated Design ◽  
Space Structure ◽  
Space Structures ◽  
Control Cost ◽  
Flexible Space Structures ◽  
Lagrange’S Equation ◽  
Conflicting Objectives ◽  
And Control

A framework has been developed to identify control-structure interaction design of flexible space structures that are Pareto optimal with respect to multiple conflicting objectives. The objectives and constraints of multiobjective optimization problem are derived from structure and control performances. The equation of motion of the flexible space structure are based on Lagrange’s equation. Multiobjective evolutionary algorithm based on decomposition (MOEA/D) is employed for optimization. This framework has been applied to a controlled idealized rotating structure to quantify tradeoffs in control-strcutrue design. The control-strcutrue design is optimized based on two conflicting objectives with minimize total mass and minimize control cost using MOEA/D. To solve the equality constraint of the above problem, an improvement is proposed in the implementation of MOEA/D. The improvement is based on the modification of new solution on each step of evolution. The numerical results obtained suggest that the MOEA/D and its improvement have the potential of practical applicability.

Simulation Analysis of Vibration Characteristics of Wrinkled Membrane Space Structure

2007 ◽  
Vol 22 (4) ◽  
pp. 239-246 ◽  
Author(s):  
Wang Changguo ◽  
Li Yunliang ◽  
Du Xingwen ◽  
He Xiaodong ◽  
Song Guozhi
Keyword(s):  
Simulation Analysis ◽  
Space Structure ◽  
Vibration Characteristics ◽  
Wrinkled Membrane

scholarly journals Structural design and control of modular tensegrity structures

2014 ◽  
Vol 19 (6) ◽  
pp. 687-702 ◽  
Author(s):  
Sarah Amouri ◽  
Julien Averseng ◽  
Jérôme Quirant ◽  
Jean-François Dube
Keyword(s):  
Structural Design ◽  
Tensegrity Structures ◽  
And Control

Empirical Formula Considering the Smoke Ventilation for Air Temperature in Large Space Structure under Fire

2011 ◽  
Vol 94-96 ◽  
pp. 587-593 ◽  
Author(s):  
Jin Liang ◽  
Su Duo Xue ◽  
Xiong Yan Li
Keyword(s):  
Air Temperature ◽  
Empirical Formula ◽  
Steel Structures ◽  
Space Structure ◽  
Space Structures ◽  
Large Space ◽  
Fire Temperature ◽  
Large Space Structure ◽  
Fire Smoke ◽  
Resistance Performance

Abstract.The fire smoke is one of the most important factors for the fire temperature field. Once the fire smoke has been exhausted effectively, the fire temperature will be reduced and the fire-resistance performance of steel structures may be improved as well. However, the research on the fire temperature in the space structures is almost bold, which could lead to the theoretical analysis result on fire temperature is quite different from the real condition. Accordingly, the air temperature condition on fire for large-space structures has been analyzed. Taken into account smoke ventilation, the empirical formula for air temperature in large space structure under fire has been modified.

Design of Hydraulic Station of Crawler Hydraulic Drilling Rig

2014 ◽  
Vol 889-890 ◽  
pp. 380-384
Author(s):  
Zhi Liu ◽  
Peng Fang ◽  
Di Wu ◽  
Dong Li
Keyword(s):  
Design Process ◽  
Structural Design ◽  
Control Technique ◽  
Pumping Station ◽  
Drilling Rig ◽  
Pumping Stations ◽  
Hydraulic Station ◽  
Scheme Selection ◽  
And Control

This article describes the design process of pumping stations of crawler full hydraulic drilling rig. The principle of full hydraulic drilling rig pumping station,scheme selection, hydraulic components selection and structural design of the tank were presented. The system used double loops in which some advanced hydraulic components and control technique were adopt.

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