公开(公告)号：JPH11132771A

公开(公告)日：1999-05-21

申请号：JP23108598

申请日：1998-07-14

Applicant: LITTON SYSTEMS INC

Inventor： WYSE STANLEY F ,  TAZARTES DANIEL A ,  FLAMM JUERGEN K P ,  LEE CHARLES A

IPC: G01C19/5705 ,  G01C19/5776 ,  G01C19/56 ,  G01P9/04

Abstract: PROBLEM TO BE SOLVED: To effectively suppress a measurement error by notching out all feedback torque in a lump with the driven frequency. SOLUTION: An acceleration input signals is inputted to a sensor 34, and a sensor output signal is inputted to a demodulator 36. The demodulator 36 demodulates the sensor output signal with the signal cos (wDt), where wD is the driving frequency, and (t) is time. The output signal of the demodulator 36 is inputted to a servo compensator 38, the servo compensator 38 generates the measured acceleration signal, and the measured acceleration signal is inputted to a feedback loop 40. The feedback loop 40 includes a torque remodulator 42 modulating the signal with cos(wDt). The output signal is inputted to the sensor 34 to complete the feedback loop 40. Demodulation occurs inside the feedback loop 40. This system is operated when all relative motion of the standard mass of the sensor 34 is completely suppressed from Coriolis acceleration and the necessary torque is measured.

公开(公告)号：DE69826373T2

公开(公告)日：2005-09-29

申请号：DE69826373

申请日：1998-06-24

Applicant: LITTON SYSTEMS INC

Inventor： WYSE STANLEY F ,  TAZARTES DANIEL A ,  FLAMM JUERGEN K P ,  LEE CHARLES A

IPC: G01C19/5705 ,  G01C19/5776 ,  G01C19/56 ,  G01P9/04

Abstract: A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.

公开(公告)号：DE69826373D1

公开(公告)日：2004-10-28

申请号：DE69826373

申请日：1998-06-24

Applicant: LITTON SYSTEMS INC

Inventor： WYSE STANLEY F ,  TAZARTES DANIEL A ,  FLAMM JUERGEN K P ,  LEE CHARLES A

IPC: G01C19/5705 ,  G01C19/5776 ,  G01C19/56 ,  G01P9/04

Abstract: A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.

公开(公告)号：CA2241463C

公开(公告)日：2001-10-02

申请号：CA2241463

申请日：1998-06-22

Applicant: LITTON SYSTEMS INC

Inventor： TAZARTES DANIEL A ,  WYSE STANLEY F ,  FLAMM JUERGEN K P ,  LEE CHARLES A

IPC: G01C19/5705 ,  G01C19/5776 ,  G01P3/00 ,  G01P15/00 ,  G01P3/16 ,  G01P3/44 ,  G01P3/489

Abstract: A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.

公开(公告)号：CA2241463A1

公开(公告)日：1999-01-14

申请号：CA2241463

申请日：1998-06-22

Applicant: LITTON SYSTEMS INC

Inventor： LEE CHARLES A ,  FLAMM JUERGEN K P ,  TAZARTES DANIEL A ,  WYSE STANLEY F

IPC: G01C19/5705 ,  G01C19/5776 ,  G01P3/00 ,  G01P15/00 ,  G01P3/16 ,  G01P3/44 ,  G01P3/489

Abstract: A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.