用自己的t265摄像头跑vins fusion，命令如下：
roslaunch realsense2_camera rs_t265.launch
rosrun vins vins_node ~/catkin_ws/src/VINS-Fusion/config/realsense_t265/stereo_imu.yaml
roslaunch vins vins_rviz.launch
运行过程中vins_rviz.launch报错如下：
[ERROR] [1610297152.043109698]: Ignoring transform for child_frame_id "body" from authority "unknown_publisher" because of a nan value in the transform (-nan -nan -nan) (-nan -nan -nan -nan)
发现在vins_node计算过程中，陀螺仪的初始化就已经是nan,具体如下：
[ WARN] [1610292968.840063373]: gyroscope bias initial calibration -nan -nan -nan
导致后面的转换矩阵一直都是nan。
求助各位大佬解决方法！！！！！！
