1. 中国科学院 机构 长春光学精密机械与物理研究所,吉林,长春,130033
2. 中国科学院大学 机构,北京,101408
3. 北京全路通信信号研究设计院集团有限公司,北京,100049
纸质出版:2020
移动端阅览
孙楠, 裴信彪, 王春军, 李继辉, 彭程, 白越. 基于立体视觉—惯导SLAM的四旋翼无人机导航算法[J]. 微电子学与计算机, 2020, 37(5): 33-38,42.
SUN Nan, PEI Xin-biao, WANG Chun-jin, et al. Four-rotor UAV navigation algorithms based on stereo visual-intertial SLAM[J]. 2020, 37(5): 33-38.
针对基于视觉的同时定位与地图构建(SLAM)系统在快速运动和特征不足时存在精度低和跟踪易失败的问题,提出了一种基于紧耦合的非线性优化的立体视觉—惯导SLAM(visual inertial SLAM
VI-SLAM)算法.首先,以关键帧的位姿作为约束,初始化惯性测量单元(IMU)的偏差,并根据IMU预积分预测当前帧的位姿;然后,在后端优化中采取非线性局部平滑的方法,融合视觉SLAM的位姿估计与IMU预积分;并通过回环检测消除累积误差,采用图优化算法进行全局地图优化.通过EuRoC数据集验证该系统的性能,对比视觉SLAM算法平均精度提升了1倍左右.并将该算法应用于立体视觉四旋翼飞行控制平台,验证所提算法的实际应用性.
In the case of too fast movement and lack of features
the simultaneous localization and mapping (SLAM) system based on visual features has low accuracy and is liable to fail in tracking.For this problem
a tightly coupled stereo visual-inertial SLAM (VI-SLAM) algorithm using nonlinear optimization is proposed.Firstly
with the pose of the key frame as the constraint
the bias of the Inertial Measurement Unit (IMU) is initialized.and the pose of the current frame is predicted based on the IMU pre-integration.then
the non-linear local smoothing method is used in the back end optimization
fusing the pose estimation of vision SLAM and IMU pre-integration.and the cumulative error is eliminated by loop detection
the global map optimization is carried out by graph optimization.The performance of the system is validated by EuRoC dataset
and the average accuracy of the system is about twice as high as that of the visual SLAM algorithm.The algorithm is applied to the stereo vision Four-rotor UAV platform
and the practical application of the proposed algorithm is verified.
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赵洋, 刘国良, 田国会, 等.基于深度学习的视觉SLAM综述[J].机器人, 2017, 39(6):889-896. DOI: 889
侯荣波, 魏武, 黄婷, 等.基于ORB-SLAM的室内机器人定位和三维稠密地图构建[J].计算机应用, 2017, 37(5):1439-1444. DOI: 1439
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张朝飞, 罗建军, 龚柏春, 等.一种复杂多介质环境下的视觉/惯性自适应组合导航方法[J].中国惯性技术学报, 2016, 24(2):190-195. DOI: 190
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