A Zero-Crossing Detection System Based on FPGA to Measure the Angular Vibrations of Rotating Shafts

Addabbo, Tommaso; Biondi, Roberto; Cioncolini, Stefano; Fort, Ada; Rossetti, Francesco

doi:10.1109/tim.2014.2321462

Cited by 18 publications

(6 citation statements)

References 22 publications

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“…Sıfır geçiş tabanlı detektörler birçok alanda kullanılmaktadır. Sıfır geçiş tabanlı detektörler; anahtarlama sistemleri [6], görüntü analizi [7], şaft titreşimlerinin açısal ölçümleri [8], hassas ultrason ölçümleri [9], rotor konumunun tespit edilmesi [10] gibi yaygın kullanıma sahiptir. Günümüzde; distorsiyonun, gecikmenin ve maliyetin en düşük olduğu sıfır geçiş tabanlı elektronik şalter çalışmaları bulunmaktadır.…”

Section: Materyal Ve Yöntemunclassified

Elektronik Şalter ve Kaçak Akım Röleli Hibrit Bir Sistemin Geliştirilmesi

Yağımlı

Yurtcu

2020

International Journal of Advances in Engineering and Pure Sciences

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ÖzManyetik alan prensibine göre çalışan geleneksel röleli anahtarlarda; rölenin enerjilenmesi, kontağı çekmesi için geçen süre, yüksek güçlü uygulamalarda kontağın aşırı ısınma sonucu yapışması, oluşacak arklar sonucu yangına sebebiyet vermesi, enerji tasarrufu gibi sorunları mevcuttur. Elektrik çarpmasında hayat kurtarıcı ve yangın tehlikesine karşı kullanılan kaçak akım rölesinde ise rölenin enerjilenip kontağı itmesi ve sistemi enerjisiz bırakmasında geçen sürenin insan hayatının kurtarılmasında nanosaniyeler mertebesinde olması gerekir. Literatürde; elektronik şalter düşük güçlü devrelerde kullanılmıştır. Bu çalışmada, yüksek güçlü devrelerde kullanılmak üzere elektronik şalter ile kaçak akım rölesi hibrit olarak geliştirilmiştir.

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Section: Materyal Ve Yöntemunclassified

Elektronik Şalter ve Kaçak Akım Röleli Hibrit Bir Sistemin Geliştirilmesi

Yağımlı

Yurtcu

2020

International Journal of Advances in Engineering and Pure Sciences

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“…(12) Effects of large value of β: Doppler sidebands with mean frequency and its harmonics cannot be ignored if β value is large [44]. (13) Systematic error in zero-crossing: In the measurement of angular velocity vibrations of rotating shafts, the zero-crossing method introduces a systematic error dependent on the frequency of the vibration harmonic [72]. (14) Pull-in-range of PLL: Frequency demodulation as well as β estimation would be possible only if the carrier frequency variation is within the pull-in-range of the PLL.…”

Section: Issuesmentioning

confidence: 99%

“…Further, the ratio method is also preferred to know the mechanical properties of the soft tissue [16]. Furthermore, [19] 410 kHz 10 mm/s NA 60 Hz production line at volvo car corporation phase detector and low-pass filter [20] 80 kHz NA 0.2 m <50 Hz flexible beam vibrations least-square method [11] 4 MHz NA <100 μm up to 1 kHz heart wall vibrations constraint least-squared approach [75] NA ±0.015 m/s peak-peak <300 μm NA blood flow and arterial wall vibrations simultaneously zero-crossing method [72] 40 MHz shaft rotating at 2500 rpm NA mechanical vibration of 0.010°at 10 Hz angular vibration of rotating shafts [47] 9 MHz NA 1000 nm 200 Hz bovine muscle motion the standard deviation method is applied in cardiac activity monitoring, blood flow velocity detection and tissue vibration. In blood flow detection under skull by Doppler Effect, centre of gravity is calculated in mean frequency which is defined in terms of power spectrum density.…”

Section: Comparisonmentioning

confidence: 99%

“…Further, the ratio method is also preferred to know the mechanical properties of the soft tissue [16]. Furthermore, www.ietdl.org [26] 200 kHz NA NA 1-3 kHz Doppler velocimetry for vibrating body of 100 mm diameter pulse Doppler ultrasound and PLL [69] 5 MHz 100 cm/s NA NA blood flow FM discriminator and integrator [70] 2 MHz 0.0002 m/s 0.001 mm 10 kHz mechanical structure vibrations Doppler shift with FM demodulator [19] 410 kHz 10 mm/s NA 60 Hz production line at volvo car corporation phase detector and low-pass filter [20] 80 kHz NA 0.2 m <50 Hz flexible beam vibrations least-square method [11] 4 MHz NA <100 μm up to 1 kHz heart wall vibrations constraint least-squared approach [75] NA ±0.015 m/s peak-peak <300 μm NA blood flow and arterial wall vibrations simultaneously zero-crossing method [72] 40 the standard deviation method is applied in cardiac activity monitoring, blood flow velocity detection and tissue vibration. In blood flow detection under skull by Doppler Effect, centre of gravity is calculated in mean frequency which is defined in terms of power spectrum density.…”

Section: Comparisonmentioning

confidence: 99%

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Vibration parameter estimation methods for ultrasonic measurement systems – a review

Singh

Sumathi

2015

IET Science, Measurement & Technology

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A review of vibration signal estimation techniques employed in ultrasonic vibration measurement systems is presented. The review focuses on the Doppler signal extraction methods including the theory and analysis pertaining to the background of ultrasonic vibration measurement techniques. The phase modulated received signal in the vibration measurement system involves constant phase shift because of ultrasonic path length, phase shift introduced by Doppler effect because of vibrating object and the parametric phase shift caused by interaction of high frequency ultrasonic wave and low pressure developed by vibrating object. Among the three phase shifts, the Doppler phase shift contains the vibrating signal information and the extraction of Doppler signal helps in knowing the velocity of the vibrating object, amplitude and phase of the vibration. Various techniques of Doppler phase shift retrieval are categorised based on the modulation index estimation procedures from the received ultrasonic signal. An analysis is made based on the information retrieval methods for estimation of vibration signal parameters, range of the vibration amplitude, frequency and the preferable carrier frequency for transmission. Further, the analysis also presents various applications in which ultrasonic vibration measurements system are employed successfully.

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“…In order to estimate the axial speed of the projectile by using magnetic measurement information, time-frequency domain analysis methods such as STFT (Short-time-Fourier-transform) [3][4][5], differential filtering [6], zero pass detection [7,8], and deformation Kalman filtering algorithm combined with peak detection are currently employed [9], but these methods all have their own defects. For example, the STFT estimation method uses Fourier transform to estimate the angular rate.…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information

Gao

Zhang

et al. 2020

Mathematical Problems in Engineering

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In the course of the guidance transformation of the rotating projectile, the accurate acquisition of the roll angle and roll angle rate is very important to the attitude determination and guidance control of the rotating projectile. However, due to the impact of high rotation and high overload of projectile, MEMS gyros have problems such as limited range, saturation, overload, and even performance degradation, which make the roll angle rate unable to be output normally. At the same time, because the MEMS gyro estimation of roll angle is in the form of angular rate integral, the roll angle cannot be estimated normally if the roll angle rate cannot be accurately obtained. In order to solve this problem, a real-time estimation of projectile roll angle and roll rate based on geomagnetic information under high dynamic and high overload conditions is presented. Firstly, according to the motion characteristics of the rotating projectile, the motion model of the projectile is established, and the roll angle and roll angle rate of the projectile are estimated by Kalman filtering algorithm under the conditions of high axial rotation and high overload. Considering the high dynamic characteristics of the rotating projectile, based on the Kalman filter, the algorithm of the forgetting filter with the forgetting factor is further adopted to estimate the roll angle and roll angle rate, so as to reduce the error caused by the estimation delay in the process of high-speed dynamic change. Simulation data and semiphysical test results show that the accuracy of roll angle estimated by this method reaches about 2° in semiphysical test, which is one time higher than that calculated by the system. In the semiphysical experiment, the accuracy of the estimated roll rotation rate reaches 5 °/s, which is more than 6 times higher than that obtained by direct derivation. In the high dynamic stage, compared with the pure Kalman filter, the accuracy of roll angle with forgetting factor estimation is improved by an order of magnitude, and the accuracy of roll angle rate is improved by 4 times, which meets the desired accuracy of rotating projectile.

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A Zero-Crossing Detection System Based on FPGA to Measure the Angular Vibrations of Rotating Shafts

Cited by 18 publications

References 22 publications

Elektronik Şalter ve Kaçak Akım Röleli Hibrit Bir Sistemin Geliştirilmesi

Elektronik Şalter ve Kaçak Akım Röleli Hibrit Bir Sistemin Geliştirilmesi

Vibration parameter estimation methods for ultrasonic measurement systems – a review

A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information

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