CIFER®-MATLAB Interfaces: Development and ... - Cal Poly

‘rms’ stores the rms value for the partial range, and ‘freq’ stores the frequency where that partial
value occurs. An example call is shown below:
>>
[msv,rms,pts,min,max,freq]=cifrms(0,'name','XVLATSWP_FRE_A0000_AIL_P',
'minfreq',0.707,'maxfreq',0.707);
**** Frequency Response Information ****
First Freq: 0.13963
Last Freq: 31.41590
Number of values in frequency response: 923
**** Mean-square value results ****
Full range root mean square value is: 3.040409
Located frequency where RMS value is
0.707000 * 3.040409 = 2.149569
At frequency 3.837147 rad/sec the RMS is 2.158710
cifhq:
The cifhq function is comprises all of the handling qualities calculations from CIFER ® ’s utility 8
as well as the utility’s quick plotting, linearized plotting, and least squares fits. There are several
output variables available to store the information resulting from the function. The most basic call
to cifhq is shown below where the function is called to set up a template structure which is then
modified for the specific response. The full list of field names can be found in Appendix C.
>> in = cifhq;
>> in.name = 'XVLATSWP_FRE_A0000_AIL_P';
>> cifhq(in);
Start Freq Start Mag Start Phase
End Freq
0.1396
End Mag
-34.5106
End Phase
2.6104
31.4159 -39.9538 96.0240
Number of values in frequency response: 923
***** Handling Qualities Characteristics *****
Start freq: 0.1396
Start phase: 2.6104
-180 deg frequency = 29.478342 (Rad/sec)
DB-Gain = -63.286926 (dB)
Linear gain = 0.000685 (Hz)
-135 deg BW freq = 29.463261 (Rad/sec)
DB-Gain = -61.210114 (dB)
Linear gain = 0.000870 (Hz)
6 dB Bandwidth frequency = 29.437544 (Rad/Sec)
Another 6 dB Bandwidth frequency =
Another 6 dB Bandwidth frequency =
27.796064 (Rad/sec)
27.782501 (Rad/sec)
Another 6 dB Bandwidth frequency = 24.950647 (Rad/sec)
Another 6 dB Bandwidth frequency =
Another 6 dB Bandwidth frequency =
24.890440 (Rad/sec)
17.924093 (Rad/sec)
Another 6 dB Bandwidth frequency = 17.860493 (Rad/sec)
TWICE 180 FREQUENCY NOT FOUND
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