460 REGULATORY CIRCUITS 



Table 8-4 Ks AS A FUNCTION OF FREQUENCY 



1.0 



0.1 



0.01 



10 

 cOp (rad/sec) 



100 



Fig. 8-39 Desired Stabilization Loop Attenuation. 



The magnitude of the error in the antenna rate signal may be specified in 

 other ways. For example, it may be determined as the allowable error in an 

 input to the course computer from a study of overall system error specifi- 

 cation. In this case the total rate error may be specified where the total 

 rate error includes tracking loop inaccuracy as well as unwanted aircraft 

 rates due to aircraft motion. The allowable total error depends on the 

 overall accuracy of the system and it may vary from about 1 mil /sec to 

 4 mils /sec. In Chapter 9, where tracking loop inaccuracies are considered 

 (Fig. 9-5) it is shown that for a total allowable random error of 0.15° /sec 

 (2.62 mils /sec /channel), the rms error component due to the aircraft motion 

 could be large enough to yield the same stabilization attenuation charac- 

 teristic that is shown in Fig. 8-39. 



