Rate Feedback Control of Free-Free Uniform Flexible Rod

2001 ◽  
Vol 24 (5) ◽  
pp. 1037-1040 ◽  
Author(s):  
Natalya Raskin ◽  
Yoram Halevi
Keyword(s):  
Feedback Control ◽  
Rate Feedback

Surface Texture Improvement in the Turning Process Via Application of a Magnetostrictively Actuated Tool Holder

1998 ◽  
Vol 120 (2) ◽  
pp. 193-199 ◽  
Author(s):  
D. Liu ◽  
J. W. Sutherland ◽  
K. S. Moon ◽  
T. J. Sturos ◽  
A. R. Kashani
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Dynamic Response ◽  
Vibration Control ◽  
Surface Texture ◽  
Turning Process ◽  
Tool Holder ◽  
Rate Feedback ◽  
Control Scheme ◽  
Surface Profiles

An active vibration control system for a turning process is presented. The system employs a magnetostrictive actuator and a rate feedback control scheme to suppress the vibration caused by random excitation in the turning process. A specially designed tool holder is developed to implement the actuation and the control scheme effectively. A model which accounts for both the dynamic response of the cutting process and the control system is described. The effectiveness of the vibration control system is studied via simulation and a series of experiments. A disturbance force is applied to the system by a shaker and the dynamic response of the system is observed. The experimental data shows that the rate feedback control scheme adds additional damping to the system and reduces the vibration. A complete set of 24 factorial design cutting experiments were also conducted using the tool holder and experimentally obtained surface profiles were compared to surface profiles obtained without the vibration control. It is shown that the system can improve the surface texture generated by the turning process.

Transporting compressed video over ATM networks with explicit-rate feedback control

1999 ◽  
Vol 7 (5) ◽  
pp. 710-723 ◽  
Author(s):  
T.V. Lakshman ◽  
P.P. Mishra ◽  
K.K. Ramakrishnan
Keyword(s):  
Feedback Control ◽  
Atm Networks ◽  
Compressed Video ◽  
Rate Feedback ◽  
Explicit Rate

Ornithopter Trajectory Generation With Stabilization

2008 ◽  
Author(s):  
John M. Dietl ◽  
Ephrahim Garcia
Keyword(s):  
Feedback Control ◽  
Discrete Time ◽  
Trajectory Generation ◽  
Flight Dynamics ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Flight Stabilization ◽  
Rate Feedback ◽  
Periodic Linear ◽  
Time Periodic

Ornithopter flight dynamics and a method for developing flight trajectories are described. These are used to study the unstable modes in hovering ornithopter flight. Stabilization is accomplished through three strategies: pitch-rate feedback control, linear quadratic regulator, and discrete-time periodic linear quadratic regulator. The discrete time controller is the only controller tested that was capable of stabilizing position of the vehicle in hover.

Changes in Heart Rate during Feedback Control of Respiration

1986 ◽  
Vol 63 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Vilfredo De Pascalis ◽  
Antonella Anello ◽  
Riccardo Venturing
Keyword(s):  
Heart Rate ◽  
Feedback Control ◽  
Respiration Rate ◽  
Rate Increase ◽  
The Other ◽  
Control Of Respiration ◽  
Heart Rate Increase ◽  
Rate Feedback ◽  
Heart Rate Feedback ◽  
Respiratory Feedback

Subjects received one of eight treatments: (1) practice at increasing heart rate with heart-rate feedback, (2) practice at decreasing heart rate with heart-rate feedback, (3) practice at increasing heart rate without heart-rate feedback, (4) practice at decreasing heart rate without heart-rate feedback, (5) practice at increasing respiration rate with respiratory feedback, (6) practice at decreasing respiration rate with respiratory feedback, (7) practice at increasing respiration rate with respiratory instructions only, (8) practice at decreasing respiration rate with respiratory instructions only. Heart rate, Respiration rate, and Respiration depth were measured. Analysis indicated that (a) subjects who controlled respiration with respiratory feedback reliably increased and decreased heart rate; (b) subjects who controlled respiration with respiratory instructions only reliably increased but not decreased heart rate; (c) subjects in the respiratory-feedback conditions showed higher heart-rate increase and decrease than heart-rate increase and decrease of subjects in the other six conditions.

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