Research on the Vibration Control Algorithms for Large Space Truss Structure Based on Precise Integration Method

2016 ◽  
Vol 13 (04) ◽  
pp. 1641021 ◽  
Author(s):  
Zhiqin Cai ◽  
Yibei Zhang ◽  
Xuefu Li ◽  
Bingbing Jin
Keyword(s):  
Optimal Control ◽  
Integration Method ◽  
Control Method ◽  
Truss Structure ◽  
Control Algorithms ◽  
Large Space ◽  
Precise Integration ◽  
Space Truss ◽  
Lq Optimal Control ◽  
Space Truss Structure

In this paper, vibration control algorithms for a large space truss structure are investigated. First, a precise integration method is used to solve the differential equation such that the validity and efficiency of the algorithm are guaranteed. Second, on the basis of the discrete algebraic equation combined with the decentralized control theory, the solving method of the control force based on the linear quadratic (LQ) optimal control theory is improved. Third, a new control method, the eigenvalue control method, is proposed in this paper, and its relationship with the LQ optimal control method is discussed. Finally, these two control methods are applied to the structure to analyze the effectiveness of vibration suppression. The simulation results show that the proposed algorithms can quickly suppress the vibration of a large space truss structure.

Vibration Control of Space Truss Structure with Viscoelastic Laminated Composite Damper

2014 ◽  
Vol 971-973 ◽  
pp. 860-863 ◽  
Author(s):  
Bao Xian Jia ◽  
Feng Gao ◽  
Wen Feng Bian
Keyword(s):  
Vibration Control ◽  
Resonance Region ◽  
Truss Structure ◽  
Pulse Excitation ◽  
Control Effect ◽  
Modal Strain Energy ◽  
Viscoelastic Composite ◽  
Optimal Position ◽  
Space Truss ◽  
Space Truss Structure

This paper works on the vibration control of the space truss structure. The damper made of viscoelastic composite was designed according to the configuration parameters of the truss structure. The parameters of damper were obtained by using the method of modal strain energy. The optimal position configuration of the damper was determined. The truss in the time domain and frequency domain was analyzed. The dynamic characteristics of three structures which are without damper, with damper in the random position configuration and with damper in the optimal position configuration were compared in the sweep excitation and pulse excitation. The result shows that the structure with damper in the optimal position configuration has a great improvement in the amplitude of vibration in the first resonance region and the amplitude attenuation of the truss. The space truss structure with viscoelastic composite damper has excellent vibration control effect.

scholarly journals Mechanism and Control of Mobile Robot on H-Type Space Truss Structure.

1996 ◽  
Vol 62 (602) ◽  
pp. 3818-3825
Author(s):  
Toshio FUKUDA ◽  
Hideo MATSUURA ◽  
Fumihito ARAI ◽  
Kenji NISHIBORI ◽  
Takashi OGURI ◽  
...  
Keyword(s):  
Mobile Robot ◽  
Truss Structure ◽  
Type Space ◽  
Space Truss ◽  
Space Truss Structure ◽  
And Control

scholarly journals Semi-Active Friction Damping of Large Space Truss Structures

2004 ◽  
Vol 11 (3-4) ◽  
pp. 173-186 ◽  
Author(s):  
L. Gaul ◽  
H. Albrecht ◽  
J. Wirnitzer
Keyword(s):  
Vibration Suppression ◽  
Flexible Structures ◽  
Truss Structure ◽  
Truss Structures ◽  
Friction Damping ◽  
Large Space ◽  
Normal Forces ◽  
Space Truss ◽  
Active Friction ◽  
Local Feedback

The present approach for vibration suppression of flexible structures is based on friction damping in semi-active joints. At optimal locations conventional rigid connections of a large truss structure are replaced by semi-active friction joints. Two different concepts for the control of the normal forces in the friction interfaces are implemented. In the first approach each semi-active joint has its own local feedback controller, whereas the second concept uses a global, clipped-optimal controller. Simulation results of a 10-bay truss structure show the potential of the proposed semi-active concept.

scholarly journals Optimal Control Method for HVAC Systems in Offices with a Control Algorithm Based on Thermal Environment

Buildings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 95 ◽  
Author(s):  
Sung-Kyung Kim ◽  
Won-Hwa Hong ◽  
Jung-Ha Hwang ◽  
Myung-Sup Jung ◽  
Yong-Seo Park
Keyword(s):  
Optimal Control ◽  
Energy Consumption ◽  
Control Method ◽  
Thermal Environment ◽  
Hvac Systems ◽  
Control Algorithms ◽  
Total Energy Consumption ◽  
Indoor Thermal Environment ◽  
Optimal Control Method ◽  
Temperature And Humidity

This study examined a method to reduce energy consumption in office buildings. Correspondingly, an optimal control method was proposed for heating, ventilation, and air conditioning (HVAC) systems via two control algorithms that considered the indoor thermal environment. The control algorithms were developed by considering temperature and humidity as the factors of the indoor thermal environment that influence the control of HVAC systems and the predicted mean vote comfort ranges. Furthermore, an experiment was performed using office equipment that incorporated the two control algorithms for HVAC systems, and the correlation between changes in the thermal environment within the office and the occupant’s comfort levels was estimated via an actual survey. The results demonstrated that the proposed control method for HVAC systems, which considered the comfort ranges of temperature and humidity and the thermal adaptation capability, can efficiently maintain the occupant’s comfort with lower energy usage compared with conventional HVAC systems. Thus, the use of the control method contributes to the reduction of total energy consumption in buildings with HVAC systems.

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