基于自适应逆控制的无人机舵控系统设计与仿真

针对无人机舵控系统获取精确模型难、控制器设计复杂、超调量大、抗干扰能力弱等问题，采用自适应滤波器方式，对无人机的舵控系统进行了建模和逆建模，设计了一种无人机自适应逆舵控系统，并以某型无人机舵控系统为例，进行了仿真验证．仿真结果表明，与传统PI控制相比，自适应逆控制的舵控系统具有更好的动态响应和抗干扰效果．     

1960年以来中国天山冰川面积及气候变化

Based on the statistics of glacier area variation measured in the Chinese Tianshan Mountains since 1960, the response of glacier area variation to climate change is discussed systematically. As a result, the total area of the glaciers has been reduced by 11.5% in the past 50 years, which is a weighted percentage according to the glacier area variations of 10 drainage basins separated by the Glacier Inventory of China (GIC). The annual percentage of area changes (APAC) of glaciers in the Chinese Tianshan Mountains is 0.31% after the standardization of the study period. The APAC varies widely for different drainage basins, but the glaciers are in a state of rapid retreat, generally. According to the 14 meteorological sta-tions in the Chinese rianshan Mountains, both the temperature and precipitation display a marked increasing tendency from 1960 to 2009 at a rate of 0.34～C.(10a)<'-1> and 11 mm.(10a)<'-1>,respectively. The temperature in the dry seasons (from November to March) increases rapidly at a rate of 0.46℃.(10a)<'-1>, but the precipitation grows slowly at 2.3 mm.(10a)<'-1>. While the temperature in the wet seasons (from April to October) grows at a rate of 0.25℃.(10a)<'-1>, but the precipitation increases at 8.7 mm.(10a)<'-1>. The annual and seasonal climatic trends ac-celerate the retreat of glaciers.     

无人机转子发动机便携式检修仪设计研究

针对无人机转子发动机原位维修缺乏手段的问题,以便携式工控计算机系统为硬件基础,利用LabVIEW虚拟仪器技术、传感器技术、信号调理技术设计了无人机转子发动机便携式检修仪．实际运用结果表明,该检修仪人机界面友好,运行稳定可靠,检测结果准确,可满足无人机转子发动机的修理检测需求．