-24] 



AIRCRAFT MOTIONS 



435 



The values are typical of maxima that may be encountered. Actually, 

 the kinematics of most attack courses do not require maneuvers of this 

 magnitude; for example, the lead collision type of attack described in 

 Chapter 2 theoretically requires no maneuvering at all once the initial error 

 has been corrected. Despite this fact, however, the aircraft will experience 

 relatively large angular rates during an attack because of lightly damped 

 oscillatory modes in the aircraft response and the marginal stability which 

 characterizes the pilot-aircraft steering loop. 



The data of Fig. 8-26, which were obtained from a typical simulation pro- 

 gram, illustrate the principle. In this simulation, a human pilot attempted 



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 TIME - 



Fig. 8-26 Typical Simulation Results, Showing Aircraft Motions During an 



Attack. 



to fly an attack course using information from a display which presented 

 steering error and aircraft roll and pitch angles. The steering error signal 

 was contaminated by radar tracking noise. Both the steering error and the 

 noise were passed through a 0.5-sec filter prior to display. 



