Vibratory gyroscope scale factor multi-parametric calibration

Chikovani, V. V.; Петренко, О.В.

doi:10.1109/msnmc.2014.6979750

Cited by 6 publications

(5 citation statements)

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“…To simulate the predetermined virtual positive and negative angle rates in a CVG operational temperature range, one should first be built a temperature model that connects the value of the electrical signal (voltage for analog CVG or code for digital one) with the angle rate that should be simulated. This model can be built by analogy with the SF model based on not necessarily only temperature data, but on the resonant frequency, drive amplitude, and quadrature amplitude, as well [14].…”

Section: Simulation Of a Virtual Angle Ratementioning

confidence: 99%

“…As has been discussed above, the more accurate approximation of the measurement data under temperature change is provided when including in the model additional parameters such as resonant frequency, drive (excitation), and quadrature amplitudes [14]. They are CVG control signals.…”

Section: Calibration Process and Its Analysismentioning

confidence: 99%

“…It should be noted that the digital code at the ADC output has been normalized so that it is numerically equal to the voltage in volts at the ADC input. The model depending on the four parameters is presented as follows [14]:…”

Section: Calibration Process and Its Analysismentioning

confidence: 99%

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Vibratory Gyroscope Scale Factor and Bias on-Run Self-calibration

Chikovani¹,

Golovach²

2021

ECS

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А new method for on-run periodic scale factor and bias self-calibration of vibratory gyroscopes in an inertial measurement unit with a redundant number of sensors is proposed. Self-calibration uses predefined virtual positive and negative angle rates to calibrate the SF, and the bias of the gyroscope that is in calibration mode, while the others, at least three gyroscopes of an inertial measurement unit, whose sensitivity axes do not lie in the same plane, operate in the measurement mode to measure the real angle rate of a vehicle. The projection of the current angle rate onto the sensitivity axis of the gyroscope being calibrated is computed from the results of measuring the full angle rate vector by the other three gyroscopes, creating conditions for the calibration procedure. In contrast to known methods, such as single-axis or multi-axis rotation of an inertial measurement unit and vibration modes reversal, the proposed method does not use mechanical rotation, which requires additional devices, and does not require a reorientation of the vibrating wave, which entails the need to align the parameters of the two measuring channels. The scale factor and bias calibration procedure using this method is the same for any gyroscope of an inertial measurement unit and can be applied to several gyroscopes at the same time. Therefore, the proposed method has great potential for an application not only for small-sized 4-gyro inertial measurement unit based on vibratory gyroscopes but also for multi-gyro inertial measurement unit based on micro-electro-mechanical gyroscopes. Experimentally shown that using the proposed method a gyro requirements mitigation coefficient can be substantially increased and can provide high accuracy for autonomous navigation systems based on low-cost, small-sized, and micro-electro-mechanical gyroscopes.

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Section: Simulation Of a Virtual Angle Ratementioning

confidence: 99%

Section: Calibration Process and Its Analysismentioning

confidence: 99%

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Vibratory Gyroscope Scale Factor and Bias on-Run Self-calibration

Chikovani¹,

Golovach²

2021

ECS

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“…MEMS gyroscope drift compensation methods can be divided into modelling compensation [7][8][9][10][11] and parameter calibration [12][13][14]. The modelling compensation method establishes the bias model and scale factor (SF) versus temperature using high-and low-temperature tests.…”

Section: Introductionmentioning

confidence: 99%

“…The output is compensated by combining the observation value and the temperature model. The multiparameter fusion modelling compensation comprises methods that combine the resonant frequency, drive amplitude, and quadrature amplitude [12] and those that combine the vibration amplitude, frequency difference, and phase [13]. Recently, novel signal processing algorithms combining machine learning and digital signal processing have been applied to MEMS gyroscope temperature‐drift compensation [14].…”

Section: Introductionmentioning

confidence: 99%

Temperature drift suppression for micro‐electro‐mechanical system gyroscope based on vibrational‐displacement control with harmonic amplitude ratio

Bu,

Feng,

Guo

et al. 2024

Micro & Nano Letters

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Micro‐electro‐mechanical system gyroscope detection output is susceptible to drift due to ambient temperature variations. Furthermore, the drive‐mode vibration amplitude is affected by the signal pickup circuit and structural parameters, which significantly influence the temperature drift of the bias and scale factor (SF). This study proposes a vibration amplitude control method based on harmonic amplitude sideband‐ratio (SBR), namely SBR‐AGC, which characterizes the vibration amplitude using the harmonic amplitude ratio of the vibrational electrical signal. The constancy of vibration amplitude is maintained via closed‐loop control to suppress bias and SF temperature drift. The experimental results on cobweb‐like disk resonator gyroscope reveal that the temperature coefficient of bias in the SBR‐AGC mode lies within −20 to 60°C and decreases by 36%, and the temperature coefficient of the SF lies within −10 to 50°C and decreases by 49.7%. Therefore, the environmental adaptability of the gyroscope is effectively improved.

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Differential mode of operation for multimode vibratory gyroscope

Chikovani

Tsiruk

2015

2015 IEEE International Conference Actual Problems of Unmanned Aerial Vehicles Developments (APUAVD)

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Vibratory gyroscope scale factor multi-parametric calibration

Cited by 6 publications

References 0 publications

Vibratory Gyroscope Scale Factor and Bias on-Run Self-calibration

Vibratory Gyroscope Scale Factor and Bias on-Run Self-calibration

Temperature drift suppression for micro‐electro‐mechanical system gyroscope based on vibrational‐displacement control with harmonic amplitude ratio

Differential mode of operation for multimode vibratory gyroscope

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