Piloted Simulation of One-on-one Helicopter Air Combat at NOE Flight LevelsDefense Technical Information Center, 1985 - 52 pages A piloted simulation designed to examine the effects of terrain proximity and control system design on helicopter performance during one-on-one air combat maneuvering (ACM) is discussed. The NASA Ames Vertical Motion Simulator (VMS) and the Computer Generated Imagery (CGI) systems were modified to allow two aircraft to be independently piloted on a single CGI data base. Engagements were begun with the blue aircraft already in a tail-chase position behind the red, and also with the two aircraft originating from positions unknown to each other. Maneuvering was very aggressive and safety requirements for minimum altitude, separation, and maximum bank angles typical of flight test were not used. Results indicate that the presence of terrain features adds an order of complexity to the task performed over clear air ACM and that a mix of attitude and rate command-type Stability and Control Augmentation System (SCAS) design may be desirable. The simulation system design, the flight paths flown, and the tactics used were compared favorably by the evaluation pilots to actual flight test experiments. Keywords include: Helicopter; Rotorcraft; Air combat; NOE(Nap Of the Earth); Flight control systems. |
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Page 10
general then , for the tight tracking task , an attitude command SCAS had advantages and whenever that track was lost or when maneuvering to attain a track , a rate command SCAS may be desirable . One pilot's comments highlighted this ...
general then , for the tight tracking task , an attitude command SCAS had advantages and whenever that track was lost or when maneuvering to attain a track , a rate command SCAS may be desirable . One pilot's comments highlighted this ...
Page 11
... tracking task seemed to be a general one . That is , when pitch control handling qualities were improved , directional control problems became more apparent . This seems to indicate a relative importance of the two axes during the ...
... tracking task seemed to be a general one . That is , when pitch control handling qualities were improved , directional control problems became more apparent . This seems to indicate a relative importance of the two axes during the ...
Page 13
... tracking task extremely well or not at all . The rating assigned to that configuration may change due to what the pilot perceives as varying amounts of compensation to perform the same task . Also , one particular encounter could ...
... tracking task extremely well or not at all . The rating assigned to that configuration may change due to what the pilot perceives as varying amounts of compensation to perform the same task . Also , one particular encounter could ...
Common terms and phrases
60 knots aggressive air combat maneuvering Air-to-Air Combat airspeed altitude Ames Research Center attitude command system blue aircraft body axis body-axis clear-air cockpit Computer Generated Imagery CONFIGURATION A204 CONFIGURATION B11 CONTROL DERIVATIVES control inputs data base deg/sec DERIVATIVES FOR CONFIGURATION display equations of motion Euler angles experiment field-of-view Firing Logic flight tests free engagements G matrix Handling qualities rating head-up display helicopter air combat hub type in./rad/sec limited longitudinal low-level maneuverable math model maximum Moffett Field motion cues nap-of-the-earth NASA Pilot comments pilot ratings pilot station Piloted Simulation pitch and roll pitch attitude probability of kill probability of survival q The F rad/sec range rate command system red aircraft roll rate scoring shot STABILITY AND CONTROL stability derivatives tail chase tail-chase position target maneuvering tracking task trim U.S. Army UH-60 Blackhawk variable Vertical Motion Simulator weapon parameters yaw rate