A correcting filter for a mechanically dithered single-axis ring laser gyro

Klimkovich, B. V.; Tolochko, A. M.

doi:10.1134/s2075108716040064

Cited by 1 publication

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of dithering coupled noise is that the dither of one gyro excited the platform to dither, which changes the dynamic state of the other DRLG. As a result, the accuracy of other DRLG declines because of the platform dither [5,6]. This paper attempts to apply the vibration absorber in inertial navigation products to eliminate dithering coupled noise.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Application of the Vibration Absorber in Laser Inertial Navigation Products

Cheng

Zhang²,

Lei³

et al. 2021

Journal of Sensors

View full text Add to dashboard Cite

The navigation accuracy of laser strap-down inertial navigation products declines with gyro dither, which is a bottleneck problem for the development of the important aviation instrument. The reason is that the dither of three gyros in the product couples and generates extra noise in the output signals of gyros. To decouple dither, this paper applies the vibration absorber in laser inertial navigation products. First of all, an angular vibration model of the three-rigid body system, which is constructed by the gyro, platform, and vibration absorber, is established. Then, the theoretical restriction of the absorber and the system response are derived. Finally, considering the power limitation for dither, the total power of the vibration system is analyzed. The analytical and experimental results show that the efficiency of the vibration absorber only relates to the frequency offset with gyros, and the absorber does lead to a sharp power increase.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The main idea of the above techniques is to make the vibration response of the platform as small as possible. The vibration absorber makes it possible for the platform to keep being motionless [6,15]. The principle is to transfer the certain frequency vibration of the platform to the absorber.…”

Section: Introductionmentioning

confidence: 99%