空中防撞系統已經是一項提供飛航安全的必備航電系統之一，同時也依舊是持續不斷改良預期提供更高的安全保障標準。911事件過後，超輕等小型飛行器似有蓬勃發展的空間。
本論文架構在探討超輕飛行器於低空防撞的研究上，藉由回顧目前許多使用中的TCAS的相關理論搭配超輕飛行器的特性，藉由超輕飛行數據模擬超輕飛行並且研究可能的衝突情況，搭配使用回報監視與衛星定位的概念，透過地面站回報的每架飛機的資料來提供飛行員可以透過電子飛行儀表(EFIS)了解週遭環境的狀況，藉此發展出適合超輕使用的防撞系統流程系統。
此系統由飛行軌跡來判斷飛行狀態與路徑，以預測飛機在未來是否有空中接近的情形，建構適當的隔離保護圈(Bubble)，且給予符合目視飛航規則下的避讓指令，以適合衝突發生，給予飛行上的安全保障。

After 911, the small aircraft transportation system (SATS) was launched to increase air transport capacity and reduce major airport traffic loads. Flight activities of small general aviation (GA) aircraft as well as sport ultra light aircraft (ULA) have become a serious concern to low altitude flights below 5,000 feet.
Consequently, viable solution of collision avoidance for small aircrafts has an urgent demand by reconstructing the similar confliction avoidance logic for use. This thesis involves a survey of TCAS for small aircrafts in low altitude. The proposed method which had discourse a lot of technologies, comprises of detection and resolution for collision avoidance. On the flight characteristics, some other relative concepts such as visual flight rule and the flight priority are combined into the logic chart. Based on ADS-B concept under VFR, TCAS operation can be built on the ground surveillance computer as well as on the airborne electronic flight instrument system (EFIS). Aircraft conflict will be detected from the ADS information.
This thesis is focused on the study of conflict detection and resolution by jointly considering ULA characteristic, especially the flight path diversity. Several feasible scenarios from real flight data are tested in simulations to look into the TCAS performance on the ground computer and the airborne EFIS. The results had confirmed the feasible and reliable development of TCAS for small aircrafts in low altitude flights.

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