体感模拟算法在运动洗出中的优化

Research on optimization of the somatosensory simulation algorithm in motion washout

针对经典体感算法参数设置固定且存在相位误差和虚假暗示导致平台空间利用率低和体感逼真度不足的问题。结合人体前庭系统模型依次改进经典算法的高通加速度通道和倾斜协调通道结构,设计自适应低通滤波器实现输入变化下截止频率的实时调节,并以平台空间利用率和平台位移变化率作为模糊控制器的输入,补偿到带通滤波器分路,最后采用位移限幅控制洗出效果。在Simulink中对改进算法建模仿真,仿真结果表明:改进洗出算法合理提升了平台的运动范围,有效减小了输入信号变化时的相位误差并消除了反向动感暗示,能够提高飞行模拟器的动感逼真度。

Since the parameters of the classic somatosensory algorithm are fixed as well as the phase errors and the false hints lead to low space utilization and insufficient somatosensory fidelity,in this article in combination with the human vestibular system model,the classic algorithm’s high-pass acceleration channel and tilt coordination channel structure improve successively,and the self-adaptive low-pass filter is developed to realize the real-time adjustment of the cut-off frequency with input changes;the platform’s space utilization rate and displacement changing rate,which are used as the input of fuzzy controller filter,are compensated to the branch of the band-pass filter. Finally,the displacement limiting is adopted to control the effect of washout. This improved algorithm is modeled and simulated with the aid of Simulink. The results show that the improved washout algorithm reasonably improves the platform’s range of motion,effectively reduces the phase error with input changes,and eliminates the hint of reverse dynamics,therefore ensuring a higher standard of motion fidelity of flight simulators.