一种新的通用航空机载防撞逻辑设计方法

发布时间：2018-08-30 11:17

【摘要】：由于机载防撞系统(TCAS)是针对具有较大垂直高度变化率的大型飞机设计的,系统设定条件和与之相关的解脱建议并不能适用于通航飞机。针对通用航空的防撞问题,提出了一种基于马尔可夫决策过程(MDP)的防撞逻辑设计方法。首先,将飞机空中相遇过程的动态模型转换为离散转移函数;然后,基于防撞系统结果事件末端效用函数进行MDP建模,采用动态规划方法导出了最优防撞逻辑的迭代方程;最后,给出了通航飞机最优化防撞逻辑的设计流程并对最优防撞逻辑进行了计算机仿真。仿真结果表明,通过调整效用比参数可以在保证安全性能的同时有效降低系统告警率。在垂直相遇高度小于30 m的相遇过程占比高达18%的情况下,当告警率大于0.85时系统的碰撞概率仅为2.88×10-4左右。该设计方法对我国在低空空域通用飞机防撞系统的研究具有一定的参考价值。
[Abstract]:Since the airborne collision prevention system (TCAS) is designed for large aircraft with a high vertical altitude change rate, the system setting conditions and the associated relief recommendations are not applicable to aircrafts. In order to solve the collision prevention problem of general aviation, a design method of collision prevention logic based on Markov decision process (MDP) is proposed. Firstly, the dynamic model of the aerial encounter process is transformed into a discrete transfer function, then the MDP model is built based on the end utility function of the collision prevention system, and the iterative equation of the optimal collision prevention logic is derived by using the dynamic programming method. Finally, the design flow of the optimal collision logic for navigable aircraft is given and the computer simulation of the optimal anti-collision logic is carried out. The simulation results show that the system alarm rate can be effectively reduced by adjusting the utility ratio parameters while ensuring the security performance. When the vertical encounter height is less than 30 m, the collision probability of the system is only 2.88 脳 10 ~ (-4) when the alarm rate is greater than 0.85. This design method has certain reference value for the research of general aircraft collision prevention system in low-altitude airspace in our country.
【作者单位】：电子科技大学自动化工程学院;西南民族大学电气信息工程学院;成都大学电子信息工程学院;成都海姆达尔科技有限公司;
【基金】：国家自然科学基金资助项目(61374190)
【分类号】：V241;V328

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