Signal scaling strategies for motion-base spaceflight simulators

When input signal is scaled in a large scope, the third-degree polynomial scaling is easy to induce signal distortion and complicated for parameters tuning, and the trigger speed of Hermite scaling is too slow to satisfy the condition. Based on this situation, two methods were put forward: the scaling of optimal parameter configuration based on the third-degree polynomial scaling and the non-linear scaling combined with linear scaling. The first method maximizes the stable region to prevent signal distortion by optimizing the configuration parameters; the latter one restricts the scaling scope in the stable region by utilizing the characteristics of linear scaling. The results have indicated that signal distortion can be avoided when the linear scaling joins in the third-degree polynomial scaling, and the method based on optimal parameter configuration shows advantages in parameters tuning and integrated scaling performance. The two methods provide more effective scaling strategies for spaceflight simulation.