The Estimation and Compensation of the Loop-Parameter-Drifting in the Digital Close-Loop Quartz Flexible Accelerometers

Ran, Longjun; Zhang, Chunxi; Song, Lailiang; Lu, Jiazhen

doi:10.1109/access.2019.2940480

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…The impact of this noise on the performance of the accelerometer cannot be ignored. In recent years, there have been many studies on the effect of noise caused by temperature change on the performance of accelerometers [ 7 , 8 , 9 , 10 , 11 ]. The newly researched temperature compensation method maintains the stability of the cold start output at about 30 μg [ 12 ], and increases the stability of 1 g acceleration output to 14.6 μg [ 13 ], which significantly improves the temperature stability of the QFA.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Noise-Detection Characteristics of Electric Field Coupling in Quartz Flexible Accelerometer

Zhang

Zhao

et al. 2023

Micromachines

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The internal electric field coupling noise of a quartz flexible accelerometer (QFA) restricts the improvement of the measurement accuracy of the accelerometer. In this paper, the internal electric field coupling mechanism of a QFA is studied, an electric field coupling detection noise model of the accelerometer is established, the distributed capacitance among the components of the QFA is simulated, the structure of the detection noise transfer system of different carrier modulation differential capacitance detection circuits is analyzed, and the influence of each transfer chain on the detection noise is discussed. The simulation results of electric field coupling detection noise show that the average value of detection noise can reach 41.7 μg, which is close to the effective resolution of the QFA, 50 μg. This confirms that electric field coupling detection noise is a non-negligible factor affecting the measurement accuracy of the accelerometer. A method of adding a high-pass filter to the front of the phase-shifting circuit is presented to suppress the noise of electric field coupling detection. This method attenuates the average value of the detected noise by about 78 dB, and reduces the average value of the detected noise to less than 0.1 μg, which provides a new approach and direction for effectively breaking through the performance of the QFA.

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Section: Introductionmentioning

confidence: 99%

Analysis of Noise-Detection Characteristics of Electric Field Coupling in Quartz Flexible Accelerometer

Zhang

Zhao

et al. 2023

Micromachines

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“…Ran et al. [13] introduced the works on the analysation of the entire close‐loop model and estimation of the loop‐parameter‐drifting. The simulation results show effectiveness on the restriction of gain‐drifting and output errors and is a benefit to the promotion of the long‐term stability of digital QFA.…”

Section: Introductionmentioning

confidence: 99%

“…The other type is the digital close-loop QFA, which owns higher theoretical accuracy compared with the analogue type [10]. The studies about the digital QFA principally concentrate on the digital servo circuit design, close-loop parameters estimation, and capacitance detection [13][14][15]. Ran et al [13] introduced the works on the analysation of the entire close-loop model and estimation of the loop-parameter-drifting.…”

Section: Introductionmentioning

confidence: 99%

“…The studies about the digital QFA principally concentrate on the digital servo circuit design, close-loop parameters estimation, and capacitance detection [13][14][15]. Ran et al [13] introduced the works on the analysation of the entire close-loop model and estimation of the loop-parameter-drifting. The simulation results show effectiveness on the restriction of gain-drifting and output errors and is a benefit to the promotion of the long-term stability of digital QFA.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical model analysis and reliability design approach of Quartz Flexible Accelerometer under fractured state

Xiao

Zhang

Song

et al. 2023

IET Circuits, Devices & Syst

Self Cite

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Currently, the Quartz Flexible Accelerometer (QFA) mounted for the applications working in high acceleration environment are suffering from the fracture of the flexible beams under external acceleration shock. This paper presents the mechanical model and reliability design approach of QFA to maintain the measuring ability under a fractured state. The structural parameters changed significantly in the mechanical model under a fractured state compared to those in the original model. A modified structure to maintain the measuring ability of QFA under a fractured state is designed with the reference of the sensitive module in Electrostatic Suspended Accelerometer (ESA). The corresponding close‐loop system is corrected and discretised to ensure the stability requirements of the mechanical model. A static experiment is conducted to prove the effectiveness of the proposed model by a prototype QFA with completely fractured flexible beams. The result shows helpful on the preliminary research for QFA with the similar sensitive structure to ESA.

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“…As the core components of the the inertial navigation system, the precision of the quartz flexible accelerometer directly affects the positioning accuracy of the navigation system. With the rapid development and wide application of strapdown inertial navigation system, it is inevitable to propose higher performance indexes such as starting time, start-up stability, and the maximum drift error to ensure the rapid start and calculation accuracy of the navigation system [ 17 ]. Therefore, researching the temperature compensation of the cold start-up phase of the accelerometer is of great significance to enhance the real-time performance and navigation accuracy of the navigation system.…”

Section: Introductionmentioning

confidence: 99%

Cold Starting Temperature Drift Modeling and Compensation of Micro-Accelerometer Based on High-Order Fourier Transform

et al. 2022

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The traditional temperature modeling method is based on the full heating of the accelerometer to achieve thermal balance, which is not suitable for the cold start-up phase of the micro-accelerometer. For decreasing the complex temperature drift of the cold start-up phase, a new temperature compensation method based on a high-order Fourier transform combined model is proposed. The system structure and repeatability test of the micro digital quartz flexible accelerometer are provided at first. Additionally, we analyzed where the complex temperature drift of the cold start-up phase comes from based on the system structure and repeatability test. Secondly, a high-order temperature compensation model combined with K-means clustering and the symbiotic organisms search (SOS) algorithm is established with repeatability test data as training data. To verify the proposed temperature compensation model, a test platform was built to transmit the measured values before and after compensation with the proposed Fourier-related model and the other time-related model, which is also a model aiming at temperature compensation in the cold start-up phase. The experimental results indicate that the proposed method achieves better compensation accuracy compared with the traditional temperature compensation methods and the time-related compensation model. Furthermore, the compensation for the cold start-up phase has no effect on the original accuracy over the whole temperature range. The stability of the accelerometer can be significantly improved to about 30 μg in the start-up phase of different temperatures after compensation.

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The Estimation and Compensation of the Loop-Parameter-Drifting in the Digital Close-Loop Quartz Flexible Accelerometers

Cited by 8 publications

References 27 publications

Analysis of Noise-Detection Characteristics of Electric Field Coupling in Quartz Flexible Accelerometer

Analysis of Noise-Detection Characteristics of Electric Field Coupling in Quartz Flexible Accelerometer

Mechanical model analysis and reliability design approach of Quartz Flexible Accelerometer under fractured state

Cold Starting Temperature Drift Modeling and Compensation of Micro-Accelerometer Based on High-Order Fourier Transform

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