# bb_estimator_ahrs v0.1.0 - Table of Contents > AHRS (Madgwick / Mahony / Complementary) estimators for the Beam Bots framework. ## Pages - [bb_estimator_ahrs](readme.md) ## Modules - [BB.Estimator.Ahrs.Complementary](BB.Estimator.Ahrs.Complementary.md): Complementary filter for 6-DOF IMUs, implemented as a `BB.Estimator`. - [BB.Estimator.Ahrs.Madgwick](BB.Estimator.Ahrs.Madgwick.md): Madgwick AHRS filter, 6-DOF IMU variant, implemented as a `BB.Estimator`. - [BB.Estimator.Ahrs.Mahony](BB.Estimator.Ahrs.Mahony.md): Mahony AHRS filter, 6-DOF IMU variant, implemented as a `BB.Estimator`. - [BB.Estimator.Ahrs.Math](BB.Estimator.Ahrs.Math.md): Stateless mathematical utilities shared across the AHRS filters. - [BB.Estimator.Ahrs.Quaternion](BB.Estimator.Ahrs.Quaternion.md): Scalar (w, x, y, z) quaternion used internally by the AHRS algorithms.