Control of Motion Reduction Cabins for Aircraft

Abstract

Aircraft cabins experience translational accelerations along three axes and rotational accelerations around three axes during flight, leading to uncomfortable motion and vibrations. To mitigate these effects, this study proposes a Motion Reduction Cabin concept. To establish its feasibility, fundamental data on commercial jet transport dynamics were measured and analyzed. The measured pitch angle variation (−5° to 22°) and maximum Z-axis acceleration (4.95 m/s²) were used to define the operating range of the Motion Reduction Cabin system. These values served as key parameters in determining the required actuator response time and displacement limits. To implement the Motion Reduction Cabin, aircraft motion is categorized into angular and translational components. Angular motion can be stabilized using a gimbal mechanism, while translational motion—particularly horizontal and lateral movements—may be mitigated using a system analogous to an air caster mechanism. However, vertical motion presents a major challenge. This study proposes a novel vertical motion compensation system, which actively counteracts vertical displacements in real time. Furthermore, a preliminary MATLAB simulation was conducted to observe the basic behavior of the system. The results suggest that the proposed system has the potential to mitigate vertical disturbances, providing promising insights for the feasibility of the Motion Reduction Cabin concept.