直升机在虚拟战场复杂地形中飞行障碍的判断

An Algorithm for Estimating the Topographic Iinfluence on the Helicopter Flying in Virtual Battlefield

虚拟战场环境中,虚拟直升机要求能够模拟低空和超低空飞行(10～100米),甚至在5米飞行高度飞行。为保障直升机在山区和山谷避免与地面碰撞,在生成虚拟直升机飞行路径时,要考虑地面地形因素的影响。以微分几何为理论基础,提出一种简洁算法,采用跟踪法进行计算和判断,解决虚拟直升机在地形较为复杂的山区和山谷中作低空和超低空自主飞行时,由计算机能够快速生成安全的飞行轨迹,或对直升机模拟器飞行后的轨迹做定量评估。通过实际使用,效果良好。

In virtual battlefield environment, it is often required that the helicopter can simulate low altitude flying close to the ground at a flying height of 10 - 100 meter, even at a flying height of 5 meter, to satisfy the requirement of tactic and flying skill. To ensure the helicopter safety in a mountainous area or a valley and to avoid collision, it needs to analyse the topographic influence. In this paper, an algorithm is put forward based on the differential geometry . Through computing and judging the track of the helicopter, it can quickly generate a safe flight path by computer, as the virtual helicopter flying in a terrain -complex mountainous area or a valley, or for evaluating the path by helicopter simulator flying, and it is proved to be robust and rehable. It works quite well by some examples.