中文摘要：

人工增雨作业是开发空中云水资源的有效手段,常规作业方式因安全性和空域因素受到一定的限制,研制一种适合高原天气、复杂地形和气候特征的长航程、大载荷等功能于一体的无人增雨飞机势在必行。该文以LY-Z200原型机为雏形,通过改变起降方式、调整发动机功率和位置、加装除冰器件,提高无人机的飞行高度和安全程度,并安装大气常规探测仪器、设计小型化的增雨播撒系统、增加航拍仪器等功能扩充无人机的使用范围,从而研制出适合高原的LY-ZY200型人工增雨无人机。经多架次试验结果表明：该无人机飞行高度达6 100 m,起飞质量达171 kg,有效载荷50 kg,加油量达42 L,最大油耗为7.2 L/h,巡航速度达187.2 km/h,巡航时间长达4 h,满足高原地区实施大范围人工增雨的任务载荷量和航程需求,并能携带10根催化烟条在-4℃以下低温云区实现空地信息互通、人工增雨作业和多样化的任务需求。高原人工增雨试验表明该无人机能够穿越较厚的云层和复杂的云内环境,实现平稳飞行和增雨催化剂的规划点播撒,催化后能够直观地反映出增加了地面有效降水。该无人机可以实现人工增雨中适当作业位置、适当作业时机开展适当播撒作业任务要求,为人工影响天气开辟了比较理想的作业方式和探测工具。

英文摘要：

The Source Region of Three Rivers is the cradle of China＇s Yangtze River, Yellow River and Lancang River. It is also a national wetland, a region with biodiversity and ecological fragility. With the economic development and environmental deterioration, the shortage of freshwater resource has become the important obstacle of economic construction and ecological restoration. Development and utilization of freshwater resource in the atmosphere is one of the main ways to solve the shortage of freshwater source on the ground surface. The implementation of artificial enhancement precipitation is an effective mean to the development of cloud water resource in complex weather conditions. The conventional manned aircraft, rocket and artillery operations cannot carry out scientific cloud seeding implementation into complex weather operation field because of some safety and airspace restriction issues, however, unmanned aircraft is a valuable tool to control and recover in meteorological survey and cloud seeding, and it is also an important direction of key technology of equipment research and development in weather modification. It is imperative that the developed unmanned aircraft, which is suitable for the characteristics of the plateau weather, adverse climate and complex terrain, is detectable, operable, controllable and recyclable, and has long voyage and high payload in enhancement precipitation. In the study, the unmanned aircraft of LY-Z200 prototype was employed as the embryonic form; through changing its mode of landing and takeoff, adjusting the engine power and position, and installing the deicer, the flying height and safety were improved. After the installment of sensors of conventional atmospheric detection, small cloud seeding instrument, and aerial photography equipment, the unmanned aircraft was developed completely, which was LY-ZY200 prototype suitable for plateau enhancement precipitation. Using this unmanned aircraft, 4 modification tests showed that the engine power of unmanned aircraft was affecte