scholarly journals A Method for Implementing Force-Limited Vibration Control

1997 ◽  
Vol 40 (4) ◽  
pp. 34-41
Author(s):  
Daniel Worth
Keyword(s):  
Signal Processing ◽  
Vibration Control ◽  
Random Vibration ◽  
Digital Signal ◽  
Test Procedures ◽  
Control Techniques ◽  
Nasa Goddard Space ◽  
Acceleration Signal ◽  
Goddard Space Flight Center ◽  
Computer Based

NASA/Goddard Space Flight Center (NASA/GSFC) has implemented force-limited vibration control on a controller which can only accept one profile. The method uses a personal computer-based digital signal processing board to convert force and/or moment signals into what appears to be an acceleration signal to the controller. This technique allows test centers with older controllers to use the latest force-limited control techniques for random vibration testing. The paper describes the method, hardware, and test procedures used. An example from a test performed at NASA/GSFC is used as a guide.

Multi-Resolution Processing for Random Vibration Control

1997 ◽  
Vol 40 (1) ◽  
pp. 35-40
Author(s):  
A. Karshenas ◽  
M. Dunnigan ◽  
B. Williams ◽  
J. Goodfollow
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Vibration Control ◽  
Frequency Domain ◽  
Random Vibration ◽  
Digital Signal ◽  
Vibration Test ◽  
Octave Band ◽  
Self Tuning

A typical vibration test for a specimen is to subject it to a specific spectrum of random vibration. This paper proposes multi-resolution processing using a "frequency domain self-tuning" algorithm for application to random vibration control. MATLAB programs simulate two-octave-band and three-octave-band processing for random vibration control. A PC-based, digital signal processing (DSP) board was used to implement two-octave processing. The simulation and practical results are presented.

Force-Limiting Testing for the Small Explorer Satellite Program at NASA Goddard Space Flight Center

2000 ◽  
Vol 43 (1) ◽  
pp. 24-30 ◽  
Author(s):  
Daniel Kaufman
Keyword(s):  
Random Vibration ◽  
Force Feedback ◽  
Wide Field ◽  
Space Craft ◽  
Test Results ◽  
Force Measurements ◽  
Nasa Goddard Space ◽  
Trace Space ◽  
Goddard Space Flight Center ◽  
Vibration Tests

The Wide Field Infrared Explorer (WIRE) and Transition Region Coronal Explorer (TRACE) Space-craft underwent random vibration testing using force-limiting techniques as a means of controlling the vibration input motions. Interface force measurements were made for random vibration tests. Automatic force feedback notching was provided for the random vibration tests. This paper presents the methods employed to determine force spectrums. Test results are presented to show the effects of the force-limiting technique.

scholarly journals Chatter Vibration Monitoring in the Surface Grinding Process through Digital Signal Processing of Acceleration Signal

Proceedings ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 126 ◽  
Author(s):  
Felipe Aparecido Alexandre ◽  
Wenderson Nascimento Lopes ◽  
Fábio Isaac Ferreira ◽  
Fábio R. L. Dotto ◽  
Paulo Roberto de Aguiar ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Surface Grinding ◽  
Vibration Monitoring ◽  
Grinding Process ◽  
Chatter Vibration ◽  
Acceleration Signal

Digital Signal Processing in a New Age

1992 ◽  
Vol 29 (4) ◽  
pp. 371-378
Author(s):  
Graham A. King
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
New Age ◽  
Computer Based ◽  
The Subject ◽  
Self Learning

DSP in a new age This paper discusses the teaching of digital signal processing to students not having a traditional background. It suggests a set of strategies and perspectives that achieve necessary standards in a sympathetic way. It describes a scheme which demystifies the subject and uses interactive self-learning computer-based tutorials.

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