运动基航天飞行训练模拟器信号缩比算法研究

当前运动基飞行模拟器对控制信号的缩比以三阶多项式缩比法为主，但其参数确定困难且当缩比幅度较大时易使信号出现较大畸变。而航天飞行模拟中常常会经历线加速度或角速度信号在较大幅值范围内的增大或减小，典型的如返回再入时的过载变化。针对此种情况，一种新的缩比算法——Hermite缩比函数法被提出。首先完善了Hermit缩比法关于最优参数理论的推导和证明；其次，引入变量“缩比度”，在实例仿真中比较了其对两种缩比方法的影响。结果表明，Hermite缩比函数法参数确定方便，其信号单调性的保持不依赖于缩比度的取值，更适合应用于缩比度变化较大的航天飞行模拟中。

Study on Signal Scaling Algorithms for Motion\|Based Spaceflight Training Simulators

The third\|degree polynomial method is widely used for control signal scaling in the motion\|based simulators, whereas it is complicated for hard parameter tuning and capable to induce perceptible signal distortion when the monotonic signal is scaled in a large scope. It happens frequently in the spaceflight simulation that signals of linear acceleration and angular velocity increase or decrease in large range, such as the acceleration signals during reentry. Based on this situation, a new strategy named Hermite scaling is put forward. The deduction and justification of the Hermite with the optimal parameter theory scaling are completed in this paper. Secondly, the variable “scaling scope” is introduced, and performances of two scaling methods are compared through demonstrations in different scaling scopes. The results have indicated that the Hermite scaling is more advantageous in the parameter tuning and the invariability for signal monotonicity is independent of the scaling scope, and more suitable for spaceflight simulation.