Primary Resonance Suppression of a Base Excited Oscillator Using a Spatially Constrained System: Theory and Experiment

2020 ◽  
pp. 115928
Author(s):  
J.W. Zhou ◽  
W. Zhang ◽  
X.S. Wang ◽  
B.P. Mann ◽  
E.H. Dowell
Keyword(s):  
System Theory ◽  
Primary Resonance ◽  
Constrained System ◽  
Excited Oscillator ◽  
Theory And Experiment

Unbalance Response of a Dual Rotor System: Theory and Experiment

1993 ◽  
Vol 115 (4) ◽  
pp. 427-435 ◽  
Author(s):  
K. Gupta ◽  
K. D. Gupta ◽  
K. Athre
Keyword(s):  
System Theory ◽  
Transfer Matrix ◽  
Mode Shape ◽  
Reasonable Agreement ◽  
Complex Variables ◽  
Rotor System ◽  
Experimental Results ◽  
Unbalance Response ◽  
Theoretical Results ◽  
Theory And Experiment

A dual rotor rig is developed and is briefly discussed. The rig is capable of simulating dynamically the two spool aeroengine, though it does not physically resemble the actual aeroengine configuration. Critical speeds, mode shape, and unbalance response are determined experimentally. An extended transfer matrix procedure in complex variables is developed for obtaining unbalance response of dual rotor system. Experimental results obtained are compared with theoretical results and are found to be in reasonable agreement.

Payload swing suppression for offshore cranes using a novel triple-tagline system: Theory and experiment

2019 ◽  
Vol 234 (2) ◽  
pp. 547-557
Author(s):  
Sheng-hai Wang ◽  
Zhao-peng Ren ◽  
Jia-lu Du ◽  
Hai-quan Chen ◽  
Yu-qing Sun
Keyword(s):  
System Theory ◽  
Dynamic Analysis ◽  
Control Strategy ◽  
Equilibrium Condition ◽  
Theoretical Basis ◽  
Dynamic Models ◽  
Hybrid Control ◽  
Ship Motions ◽  
Air Damping ◽  
Theory And Experiment

Offshore cranes are widely used for lifting operations at sea. However, due to the ship motions and crane operations, the payload swing is unavoidable, hence putting the operators in danger. Thus, this article proposes a novel triple-tagline system which has three taglines forming a triangle structure in the space and can suppress the payload swing in arbitrary directions. The kinematic and dynamic models are built in a systematic manner, which establish the theoretical basis of position synchronization and tension setting of the taglines. Then, dynamic analysis is carried out to explore the effect of the taglines’ tension on payload swing suppression, but it is unexpected to find that the taglines cannot suppress the dynamic payload swing if they always hold the static equilibrium condition. Furthermore, inspired by the air damping phenomenon, a damp-based tagline tension setting method is proposed to guarantee the resultant force of the taglines would always keep the tendency to damp the payload swing. At last, a tension/position hybrid control strategy is presented to prevent the interference of the taglines to crane operations. The validity of the proposed method and strategy are verified by experimental results.

scholarly journals Effective Temperature in an Interacting Vertex System: Theory and Experiment on Artificial Spin Ice

2010 ◽  
Vol 105 (4) ◽  
Author(s):  
Cristiano Nisoli ◽  
Jie Li ◽  
Xianglin Ke ◽  
D. Garand ◽  
Peter Schiffer ◽  
...  
Keyword(s):  
System Theory ◽  
Effective Temperature ◽  
Spin Ice ◽  
Artificial Spin Ice ◽  
Theory And Experiment

Carrier-to-noise ratio for an equal-gain coherent laser radar receiver array system: theory and experiment

1998 ◽  
Author(s):  
Larry C. Andrews ◽  
Deborah E. Kelly ◽  
Ronald L. Phillips ◽  
Arthur R. Weeks ◽  
James E. Harvey ◽  
...  
Keyword(s):  
System Theory ◽  
Laser Radar ◽  
Receiver Array ◽  
Noise Ratio ◽  
Coherent Laser Radar ◽  
Theory And Experiment

Mode switchable hybrid spatial states generated in fiber system: Theory and experiment

2020 ◽  
Vol 123 ◽  
pp. 105909
Author(s):  
Baiwei Mao ◽  
Yange Liu ◽  
Mao Feng ◽  
Hongwei Zhang ◽  
Kang Yang ◽  
...  
Keyword(s):  
System Theory ◽  
Fiber System ◽  
Theory And Experiment
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