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同一个雷达,内置IMU,每次标定结果有差异 #117

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seven12767 opened this issue Dec 16, 2024 · 2 comments
Open

同一个雷达,内置IMU,每次标定结果有差异 #117

seven12767 opened this issue Dec 16, 2024 · 2 comments

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@seven12767
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请问大佬,同一个场景,采集多组数据,每次标定结果都有差异,理论平移外参小于5cm,标定结果会大于10cm,请问标定时对采集数据的手法有要求吗?比如运动幅度、速度啥的?另外,我这边跑出来的线性加速度曲线很奇怪,lidar和imu差别很大,请问这个是运动激励不够嘛?
acc

@zfc-zfc
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zfc-zfc commented Dec 16, 2024

请问大佬,同一个场景,采集多组数据,每次标定结果都有差异,理论平移外参小于5cm,标定结果会大于10cm,请问标定时对采集数据的手法有要求吗?比如运动幅度、速度啥的?另外,我这边跑出来的线性加速度曲线很奇怪,lidar和imu差别很大,请问这个是运动激励不够嘛? acc

对手法是有一定要求的,可以参考视频里面的方法,沿着三个轴画弧线。这里看起来,lidar的加速度noise有点大,可以尝试把acc_cov再调小一点;同时加速度的激励不太充分,可以加减速稍微明显一些。

@seven12767
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感谢指导,还想请问大佬,acc_cov主要影响什么?我设置的acc_cov=2, gyr_cov=2,这两个值要设置多少比较合适?或者说根据哪些数据来调整这个值?我尝试acc_cov=0.5,lidar和imu的加速度曲线还是差别较大。另外,我用的是固态雷达,FOV为120°,请问这种情况下cut_frame_num设置多少比较合适? @zfc-zfc

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