AN OPTIMAL TRACKING CONTROL APPROACH TO THE SUSTAINED ACCELERATION CONSTRUCTION IN A FLIGHT SIMULATOR MOTION SYSTEM

The purpose of this research is to solve some problems with the opti-mal control approach to the design of moving flight simulators. A tracking model of the optimal washout filter is applied in the human vestibular sen-sation system. It can efficiently limit the translational motion of the plat-form and also generate sustained acceleration. The simulation results dem-onstrate that we can minimize the difference between the physiological outputs of the vestibular organs of the actual system and the simulator plat-form system. In this work, the otolith senses not only the high frequency component of the acceleration, but also the sustained acceleration con-structed by the gravity component with the corresponding rate- limited tilt angle in the simulator. For the tracking model, the actual acceleration input signal is divided into two parts: one is the high frequency component of the acceleration, and the other is the sustained acceleration. Using the tracking methodology, we achieve a high fidelity motion cueing, which shows that the sensing error of the otolith and semicircular canal can be suppressed to below one threshold unit, and that the displacement can also be controlled within the working space of the simulator. Since an actual (generally below 0.8g) simulator can not produce over 1g of sustained acceleration for a high maneuver aircraft, an f-scale is used to adjust the degree of the simulation limitation