VIBRATION SIMULATION

TM 55-6930-212-10 2-83. VIBRATION SIMULATION. 2-84. An electrohydraulic seat shaker transmits vibrational effects to the trainees, but its effects are isolated from other compartment-mounted hardware and other simulator occupants. 2-85. COCKPIT INSTRUMENTATION SIMULATION . 2-86. All cockpit instruments and controls are modified actual aircraft instruments that accept outputs from dc analog circuitry under computer control and respond with the desired deflections or rotations. Three basic types of circuitry are used to drive the following classes of instruments: Meter movement instruments Servo instruments Synchro instruments 2-87. RADIO COMMUNICATION AND INTERCOMMUNICATION SYSTEM SIMULATION. 2-88. An internal communication system (ICS) under computer control directs audio signals by means of C-6533/ARC control panels for: Trainee to trainee IOS to observer Trainee to IOS Trainee to observer IOS to trainee IOS to computer room Observer to IOS Computer room to IOS NOTE The simulator C-6533 ICS operates identically to that in the helicopter. The observer station ICS control box switches must be in the following positions for the instructor to observe communication: (1) all toggle switches down/OFF; and (2) selector switch on position 5. The IOS C-6533 ICS control box switches must be in the following positions for total IOS communication functions: (1) toggle switches 1 through 5 up/ON; (2) AUX and NAV switches down/OFF; and (3) selector switch on position 5. 2-89. MALFUNCTION SIMULATION. 2-90. Approximately 220 malfunctions can be inserted by the instructor. Malfunctions are realistic, and they provide the pilot and copilot with meaningful training in emergency responses. 2-91. CONTROL LOADING. 2-92. The control loading system provides a realistic and responsive feel to the simulated helicopter flight controls. Electrohydraulic units, combined with a mechanical linkage system, produce initiating and reactive forces for the controls. Simulation computer feedback causes the appropriate motions of the aircraft in flight. During a demonstration playback, the cockpit flight controls are driven by the computer and appropriately positioned in response to aircraft motion. 2-17/(2-18 blank)