Digital control of a shaker to a specified shock spectrum
Abstract
A digital computer based control system was developed for a biaxial electrohydraulic shaker table used for seismic qualification testing of nuclear power plant components. The system drive signals were developed from a weighted linear sum of 1/6-octave psuedo random noise signals. Preliminary drive signal shaping is accomplished through the use of a series of table mounted dummy mass transfer functions obtained from a previously generated data bank. Adjustments to the drive signal are made by direct comparison of the resulting test response spectrum (TRS) to the required response spectrum (RRS). Drive signal shaping sequences for a 2000 lb electrical equipment control cabinet are presented to demonstrate the effectiveness of the control system for seismic qualification.
- Publication:
-
Shock Vibration Information Center Shock Vibration Bulletin
- Pub Date:
- May 1982
- Bibcode:
- 1982SVICB........1U
- Keywords:
-
- Computer Techniques;
- Seismic Waves;
- Shakers;
- Digital Computers;
- Electric Control;
- Hydraulic Control;
- Instrumentation and Photography