The system described represents a new technique for enhancing the fidelity of flight simulators during high acceleration maneuvers. This technique forces the simulator pilot into active participation and energy expenditure similar to the aircraft pilot undergoing actual accelerations. The Bionic Control of Acceleration Induced Dimming (BIOCONAID) System consists of an electromyographic subsystem and software for four physiological models: cardiovascular model, g-suit model, straining model, and visual field model. Experimental results indicate that the system can realistically simulate visual dimming with straining during high accelerations. (Author/WB)