Periodic Force Control for Porpoising of High-Speed Planing Vessels

2012 ◽  
Author(s):  
Qidan Zhu ◽  
Zhengqiao Jiang ◽  
Zhilin Liu ◽  
Yongtao Yu
Keyword(s):  
Force Control ◽  
High Speed ◽  
Periodic Force

scholarly journals Force control of high-speed, lightweight robotic manipulators

1990 ◽  
Vol 14 ◽  
pp. 474-479 ◽  
Author(s):  
H.-J. Su ◽  
B.-O. Choi ◽  
K. Krishnamurthy
Keyword(s):  
Force Control ◽  
High Speed ◽  
Robotic Manipulators

Design and Analysis of the Selective Compliance Device for Stacking Machine

1995 ◽  
Author(s):  
Sun-Lai Chang
Keyword(s):  
Force Control ◽  
High Speed ◽  
Material Handling ◽  
Low Cost ◽  
Final Position ◽  
Space Efficiency ◽  
Feed Forward Control ◽  
Rotation Center ◽  
Four Bar Linkage ◽  
Innovative Concept

Abstract An innovative concept of the remote center semi-passive device for the material handling machine has been introduced. This device is used to adjust the final position and/or orientation of a package passively and quickly so that this package can fit into the package stack corner. In this paper, we have designed a double-pantograph mechanism to adjust the position of the package. We have also introduced the idea of using a four-bar linkage to remote the rotation center of the package so that the orientation can be adjusted passively. The workspace of such a device has been analyzed. The dimension has also been synthesized by optimization. Using this mechanism, the force control can be avoided and the control of this device becomes a feed-forward control. It is believed that its implementation will result in low cost, high speed, better stability and space efficiency of the package stack.

scholarly journals External Periodic Force Control of a Single-Degree-of-Freedom Vibroimpact System

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Jingyue Wang ◽  
Haotian Wang ◽  
Tie Wang
Keyword(s):  
Periodic Orbits ◽  
Force Control ◽  
Time History ◽  
Degree Of Freedom ◽  
Bifurcation And Chaos ◽  
Periodic Force ◽  
Chaotic Motions ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Impact System

A single-degree-of-freedom mechanical model of vibro-impact system is established. Bifurcation and chaos in the system are revealed with the time history diagram, phase trajectory map, and Poincaré map. According to the bifurcation and chaos of the actual vibro-impact system, the paper puts forward external periodic force control strategy. The method of controlling chaos by external periodic force feedback controller is developed to guide chaotic motions towards regular motions. The stability of the control system is also analyzed especially by theory. By selecting appropriate feedback coefficients, the unstable periodic orbits of the original chaotic orbit can be stabilized to the stable periodic orbits. The effectiveness of this control method is verified by numerical simulation.

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