An earthmoving machine comprising a machine chassis, a translational chassis drive, a translational chassis movement indicator, an earthmoving implement, an implement inclinometer, an implement state estimator, and implement control architecture, wherein: the earthmoving implement is coupled to the machine chassis such that translational movement imparted to the machine chassis by the translational chassis drive is also imparted to the earthmoving implement; the earthmoving implement is configured for rotational movement in one or more target degrees of rotational freedom; the translational chassis movement indicator provides a measurement indicative of movement of the machine chassis in one or more translational degrees of freedom; the implement inclinometer comprises (i) an implement accelerometer, which provides a measurement indicative of acceleration of the earthmoving implement in one or more translational or rotational degrees of freedom and (ii) an implement angular rate sensor, which provides a measurement of a rate at which the earthmoving implement is rotating in one or more degrees of rotational freedom; the implement state estimator executes a fusion algorithm that generates an implement state estimate I STATE based at least partially on implement position signals I 1, I 2, where the implement position signal I 1 is received from the implement angular rate sensor and the implement position signal I 2 is received from the implement accelerometer, both of which are mechanically coupled to the earthmoving implement; the implement state estimator executes the fusion algorithm as a further function of a translational noise signal N Trans derived at least partially from the translational chassis movement indicator and a rotational noise signal N Rot derived at least partially from the implement inclinometer such that I STATE = f I 1 I 2 W where W represents one or more weighting factors that represent the translational noise signal N Trans, the rotational noise signal N Rot, or both; and the implement control architecture utilizes the implement state estimate I STATE and a target implement command to control rotational movement of the earthmoving implement in the one or more target degrees of rotational freedom based on a comparison of the implement state estimate I STATE and the target implement command. the earthmoving implement is coupled to the machine chassis such that translational movement imparted to the machine chassis by the translational chassis drive is also imparted to the earthmoving implement; the earthmoving implement is configured for rotational movement in one or more target degrees of rotational freedom; the translational chassis movement indicator provides a measurement indicative of movement of the machine chassis in one or more translational degrees of freedom; the implement inclinometer comprises (i) an implement accelerometer, which provides a measurement indicative of acceleration of the earthmoving implement in one or more translational or rotational degrees of freedom and (ii) an implement angular rate sensor, which provides a measurement of a rate at which the earthmoving implement is rotating in one or more degrees of rotational freedom; (i) an implement accelerometer, which provides a measurement indicative of acceleration of the earthmoving implement in one or more translational or rotational degrees of freedom and (ii) an implement angular rate sensor, which provides a measurement of a rate at which the earthmoving implement is rotating in one or more degrees of rotational freedom; the implement state estimator executes a fusion algorithm that generates an implement state estimate I STATE based at least partially on implement position signals I 1, I 2, where the implement position signal I 1 is received from the implement angular rate sensor and the implement position signal I 2 is received from the implement accelerometer, both of which are mechanically coupled to the earthmoving implement; the implement state estimator executes the fusion algorithm as a further function of a translational noise signal N Trans derived at least partially from the translational chassis movement indicator and a rotational noise signal N Rot derived at least partially from the implement inclinometer such that I STATE = f I 1 I 2 W where W represents one or more weighting factors that represent the translational noise signal N Trans, the rotational noise signal N Rot, or both; and the implement control architecture utilizes the implement state estimate I STATE and a target implement command to control rotational movement of the earthmoving implement in the one or more target degrees of rotational freedom based on a comparison of the implement state estimate I STATE and the target implement command.