The objective of this research was to determine the Nomoto model maneuverability indices of an agricultural unmanned airboat which was developed to perform autonomous weeding and paddy growth monitoring in a paddy fie...The objective of this research was to determine the Nomoto model maneuverability indices of an agricultural unmanned airboat which was developed to perform autonomous weeding and paddy growth monitoring in a paddy field.A global positioning system compass and an inertial measurement unit were attached on the airboat body to record the position,heading and angular rate.The zig-zag experiments were adopted to obtain the maneuverability indices.The Matlab-based maneuvering simulations were conducted and compared with field experimental data of circular motion test and sinusoidal running test,respectively.The results showed that the trace error was at sub-meter level,which expounds the validity of the obtained maneuvering indices.The proposed Nomoto model maneuverability indices can be used to improve the airboat precise automatic control in paddy field.展开更多
以气力推进艇螺旋桨叶片三维扫描重构过程的误差分析为主要研究内容。首先,阐述了逆向工程中模型重构过程的主要误差来源;其次,针对叶片曲面形状复杂的特点,利用Geomagic Control 2017软件对重构曲面和点云模型进行3D误差、2D误差及轮...以气力推进艇螺旋桨叶片三维扫描重构过程的误差分析为主要研究内容。首先,阐述了逆向工程中模型重构过程的主要误差来源;其次,针对叶片曲面形状复杂的特点,利用Geomagic Control 2017软件对重构曲面和点云模型进行3D误差、2D误差及轮廓偏差(SIL-DEV)的统计结果进行对比分析,用Geomagic Qualify 2012软件对叶片模型进行截面2D扭曲分析。展开更多
文摘The objective of this research was to determine the Nomoto model maneuverability indices of an agricultural unmanned airboat which was developed to perform autonomous weeding and paddy growth monitoring in a paddy field.A global positioning system compass and an inertial measurement unit were attached on the airboat body to record the position,heading and angular rate.The zig-zag experiments were adopted to obtain the maneuverability indices.The Matlab-based maneuvering simulations were conducted and compared with field experimental data of circular motion test and sinusoidal running test,respectively.The results showed that the trace error was at sub-meter level,which expounds the validity of the obtained maneuvering indices.The proposed Nomoto model maneuverability indices can be used to improve the airboat precise automatic control in paddy field.
文摘以气力推进艇螺旋桨叶片三维扫描重构过程的误差分析为主要研究内容。首先,阐述了逆向工程中模型重构过程的主要误差来源;其次,针对叶片曲面形状复杂的特点,利用Geomagic Control 2017软件对重构曲面和点云模型进行3D误差、2D误差及轮廓偏差(SIL-DEV)的统计结果进行对比分析,用Geomagic Qualify 2012软件对叶片模型进行截面2D扭曲分析。