Scheduling of input shaping and transient vibration absorbers for high-rise elevators

2006 ◽  
Author(s):  
J. Fortgang ◽  
V. Patrangenaru ◽  
W. Singhose
Keyword(s):  
Input Shaping ◽  
Vibration Absorbers ◽  
Transient Vibration ◽  
High Rise

scholarly journals Wind-Induced Response Control of High-Rise Buildings Using Inerter-Based Vibration Absorbers

2019 ◽  
Vol 9 (23) ◽  
pp. 5045 ◽  
Author(s):  
Qinhua Wang ◽  
Haoshuai Qiao ◽  
Dario De Domenico ◽  
Zhiwen Zhu ◽  
Zhuangning Xie
Keyword(s):  
Damping Ratio ◽  
Element Model ◽  
Tuned Mass Damper ◽  
Induced Response ◽  
Vibration Absorbers ◽  
Acceleration Response ◽  
Vibration Mitigation ◽  
High Rise ◽  
Mass Damper ◽  
Good Trade

The beneficial mass-amplification effect induced by the inerter can be conveniently used in enhanced variants of the traditional Tuned Mass Damper (TMD), namely the Tuned Mass-Damper-Inerter (TMDI) and its special case of Tuned Inerter Damper (TID). In this paper, these inerter-based vibration absorbers are studied for mitigating the wind-induced response of high-rise buildings, with particular emphasis on a 340 m tall building analyzed as case study. To adopt a realistic wind-excitation model, the analysis is based on aerodynamic forces computed through experimental wind tunnel tests for a scaled prototype of the benchmark building, which accounts for the actual cross-section of the structure and the existing surrounding conditions. Mass and stiffness parameters are extracted from the finite element model of the primary structure. Performance-based optimization of the TMDI and the TID is carried out to find a good trade-off between displacement- and acceleration-response mitigation, with the installation floor being an explicit design variable in addition to frequency and damping ratio. The results corresponding to 24 different wind directions indicate that the best vibration mitigation is achieved with a lower installation floor of the TMDI/TID scheme than the topmost floor. The effects of different parameters of TMD, TMDI and TID on wind-induced displacement and acceleration responses and on the equivalent static wind loads (ESWLs) are comparatively evaluated. It is shown that the optimally designed TMDI/TID can achieve better wind-induced vibration mitigation than the TMD while allocating lower or null attached mass, especially in terms of acceleration response.

Concurrent Design of Vibration Absorbers and Input Shapers

2004 ◽  
Vol 127 (3) ◽  
pp. 329-335 ◽  
Author(s):  
Joel Fortgang ◽  
William Singhose
Keyword(s):  
Feedback Control ◽  
Computer Simulations ◽  
Performance Feedback ◽  
High Performance ◽  
Experimental Results ◽  
Input Shaping ◽  
Concurrent Design ◽  
Vibration Absorbers ◽  
External Disturbances

Systems with flexible dynamics often vibrate due to external disturbances, as well as from changes in the reference command. Feedback control is an obvious choice to deal with these vibrations, but in many cases, it is insufficient or difficult to implement. A technique that does not rely on high performance feedback control is presented here. It utilizes a combination of vibration absorbers and input shapers. Vibration absorbers have been used extensively to reduce vibration from sinusoidal disturbances, but they can also be implemented to reduce the response from transient functions. Input shaping has proven beneficial for reducing vibration that is caused by changes in the reference command. However, input shaping does not deal with vibration excited by external disturbances. In this paper, vibration absorbers and input shapers are designed sequentially and concurrently to reduce vibration from both the reference command and from external disturbances. The usefulness of this approach is demonstrated through computer simulations and experimental results.

Hybrid Robust Control for Gantry Crane System

2010 ◽  
Vol 29-32 ◽  
pp. 2082-2088 ◽  
Author(s):  
Zhi Mei Chen ◽  
Wen Jun Meng ◽  
Ming Hui Zhao ◽  
Jing Gang Zhang
Keyword(s):  
Sliding Mode Control ◽  
Hybrid Control ◽  
Sliding Mode ◽  
Gantry Crane ◽  
Input Shaping ◽  
Transient Vibration ◽  
Shaping Technique ◽  
Mode Control ◽  
System A ◽  
Accurate Position

A new hybrid control scheme combining input shaping technique with robust sliding mode control is proposed for a gantry crane system. A cascade sliding-mode controller is designed to control the trolley position and eliminate the sway of load. The transient vibration is reduced further for safety problems by the input shaping technique which utilizes zero-vibration-derivative (ZVD) robust input shapers. This method can not only realize the accurate position of the trolley and eliminate the sway of the load and residual vibration, but also completely eliminate the chattering of conventional sliding mode control and improve the robustness of system. The simulation results proved its effectiveness.

scholarly journals Optimal design of inerter-integrated vibration absorbers for seismic retrofitting of a high-rise building in Colombia

2019 ◽  
Vol 1264 ◽  
pp. 012031 ◽  
Author(s):  
Yuan Li ◽  
Luca Lombardi ◽  
Flavia De Luca ◽  
Yosef Farbiarz ◽  
John Jairo Blandon ◽  
...  
Keyword(s):  
Optimal Design ◽  
Seismic Retrofitting ◽  
Vibration Absorbers ◽  
High Rise ◽  
High Rise Building

Ergonomic evaluation of track-type stair descent devices used for the evacuation of high rise buildings

2012 ◽  
Author(s):  
Steven A. Lavender ◽  
Jay P. Mehta ◽  
Glenn E. Hedman ◽  
Sanghyun Park ◽  
Paul A. Reichelt ◽  
...  
Keyword(s):  
High Rise ◽  
Stair Descent ◽  
Ergonomic Evaluation
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