Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

单位错了吧? #30

Open
yandld opened this issue Nov 20, 2020 · 3 comments
Open

单位错了吧? #30

yandld opened this issue Nov 20, 2020 · 3 comments

Comments

@yandld
Copy link

yandld commented Nov 20, 2020

acc和 gyr 的 零偏稳定性 单位错了吧

@voyage19941119
Copy link

acc和 gyr 的 零偏稳定性 单位错了吧

acc gyro bias instability 在这篇git里单位是 (rad /s ) * sqrt(Hz) , 和 (m/s2)*sqrt(Hz), 等价为 rad/s2/sqrt(Hz), m/s3/sqrt(Hz)
kalib 里的单位一致, 也和 Indirect Kalman Filter For 3d Attitude Estimation 里推导的 bias 对时间导数的标准差单位一致。
我理解,这是bias 对时间导数的标准差,而不是bias标准差。如果说的不对请 @gaowenliang 指正

@voyage19941119
Copy link

而查看Xsense手册,上面写的 In-run bias stability 单位是 deg/h, m/s2. 我理解, 这是离散化后的单位, 而这篇git里的是连续时间的单位。 参考Indirect Kalman Filter公式 (129)(130)
bias离散化单位

@zhaozhongch
Copy link

我差点也看错了。公式是正确的,谢谢解释

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

3 participants