基于预测和双缓冲区的直升机视景仿真

Helicopter Visual Simulation Based on Prediction and Double Buffer

为了解决直升机视景仿真中的飞控与视景不同步和降落问题,首次提出了一种基于预测和双缓冲的直升机视景系统数据同步的解决方法;该方法首先将直升机的姿态信息进行采样处理,使之与视景仿真频率匹配,然后将处理后的姿态信息分别存储于两个缓冲区中,一个缓冲区的数据驱动场景进行渲染,另一个缓冲区的数据被用来预测下一帧飞机的位置姿态,将预测到的数据发送给视景进行碰撞检测,最终引导直升机正确着落;实验结果显示,该方法产生的数据比不做处理的数据更接近真实数据,能够满足视景仿真数据的实时性需求,目前该方法已成功应用在直升机通用着舰训练系统中。

A solution of helicopter visual system based on prediction and double buffer is proposed in this paper,which can solve two problems,one is the problem of asynchronism between flight control and visual simulation,the other is landing.The program sampled attitude information of helicopter in order to match frequency of the visual simulation firstly,and then stored it in two buffers.Data in one buffer driven scene rendering,another was used to predict the plane’s location of the next frame which is sent to the visual simulation for collision detection and eventually lead helicopter landing.The experimental results show that the processed data is closer to the real data than the original data and can meet the demand of real-time visual simulation,and that the method has been successfully used in general helicopter carrier landing system.