초록 ▼

An angular rate sensor structure displaying high immunity to noise and feedback vibration is disclosed. Mounting elements (15) support a pair of matched vibratory piezoelectric bender elements (10) in symmetrical opposed alignment about a nodal axis (20). Each vibratory element includes a drive elem

An angular rate sensor structure displaying high immunity to noise and feedback vibration is disclosed. Mounting elements (15) support a pair of matched vibratory piezoelectric bender elements (10) in symmetrical opposed alignment about a nodal axis (20). Each vibratory element includes a drive element (10A) and sense element (10B) connected to and for operative movement with the drive element. Resonance drive element (30) moves the vibratory elements (10) in a first mode of movement, in dirct opposition to one another about the nodal axis. The sensing members (10B) detect movement of the vibratory elements in directions other than in the first mode of movement resulting from application of external angular rate forces applied to the vibratory elements.

대표청구항 ▼

Improved angular rate sensor apparatus, comprising: (a) a pair of matched vibratory piezoelectric angular rate sensor elements, each comprising a drive bender member having a drive resonance frequency and suitable for receiving an energizing drive signal and a sense bender member having a sense reso

Improved angular rate sensor apparatus, comprising: (a) a pair of matched vibratory piezoelectric angular rate sensor elements, each comprising a drive bender member having a drive resonance frequency and suitable for receiving an energizing drive signal and a sense bender member having a sense resonance frequency operatively connected for movement with said drive bender member and suitable for receiving an actuation stimulus; (b) means for mounting said pair of angular rate sensor element in close proximity within a distance of 0.008 wavelengths of said drive resonance frequency, for physical vibration in direct opposition to one another about a nodal axis; (c) drive means operatively connected with said drive bender members of said sensor elements for energizing said sensor elements in a first mode of operation for opposed oscillatory motion relative to one another about said nodal axis; wherein vibrational forces from said pair of elements cancel along said nodal axis such that transmission thereof through said mounting means is negligible and acoustic noise radiation from said apparatus is reduced; (d) sensing means independent from said drive means and operatively connected with at least one of said sense bender members for producing a sensed output signal in response to a received actuation stimulus, wherein said stimulus causes a change in movement of said one sense bender member from its first vibrational mode of operation.