Asynchronous fusion algorithm of highly maneuvering targets

Fu, Xiaorong; Jiang, Changsheng

doi:10.1109/isscaa.2008.4776300

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…For calibration, the jerk sensor was subjected to 40 input accelerations in the range of 0.1~1.2 (G). The input accelerations were generated at 20, 40, 60, 80 and 100% torque at each frequency of 5,10,15,20,25,30,35 and 40 (Hz). Then, the experimental calibration curve of the L-35 jerk sensor was constructed by plotting the output gyroscope voltage versus the input jerk for all the 40 input signals recorded in the frequency range of 5~40 (Hz).…”

Section: Experimental Work Detailsmentioning

confidence: 99%

“…Accelerometer sensors must have high responsiveness and resolution to sense acceleration accurately, and this is achieved by maintaining a high Q-factor to prevent any reduction in the sensitivity due to increased damping [ 8 , 9 ]. Unfortunately, the current measurement of the jerk using accelerometers is mainly based on signal processing by differentiating the input acceleration with respect to time [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. This indirect technique of measuring the input jerk consumes more calculations and time.…”

Section: Introductionmentioning

confidence: 99%

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A Developed Jerk Sensor for Seismic Vibration Measurements: Modeling, Simulation and Experimental Verification

Geriesh

El-Bab

Khair-Eldeen

et al. 2023

Sensors

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Acceleration-based sensors are widely used in indicating the severity of damage caused to structural buildings during dynamic events. The force rate of change is of interest when investigating the effect of seismic waves on structural elements, and hence the calculation of the jerk is necessary. For most sensors, the technique used for measuring the jerk (m/s3) is based on differentiating the time–acceleration signal. However, this technique is prone to errors especially in small amplitude and low frequency signals, and is deemed not suitable when online feedback is required. Here, we show that direct measurement of the jerk can be achieved using a metal cantilever and a gyroscope. In addition, we focus on the development of the jerk sensor for seismic vibrations. The adopted methodology optimized the dimensions of an austenitic stainless steel cantilever and enhanced the performance in terms of sensitivity and the jerk measurable range. We found, after several analytical and FE analyses, that an L-35 cantilever model with dimensions 35 × 20 × 0.5 (mm3) and a natural frequency of 139 (Hz) has a remarkable performance for seismic measurements. Our theoretical and experimental results show that the L-35 jerk sensor has a constant sensitivity value of 0.05 ((deg/s)/(G/s)) with ±2% error in the seismic frequency bandwidth of 0.1~40 (Hz) and for amplitudes in between 0.1 and 2 (G). Furthermore, the theoretical and experimental calibration curves show linear trends with a high correlation factor of 0.99 and 0.98, respectively. These findings demonstrate the enhanced sensitivity of the jerk sensor, which surpasses previously reported sensitivities in the literature.

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Section: Experimental Work Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Developed Jerk Sensor for Seismic Vibration Measurements: Modeling, Simulation and Experimental Verification

Geriesh

El-Bab

Khair-Eldeen

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…2-hydroxypropyltrimethyl ammonium chloride chitosan (short for HTCC) is synthesized by the chemical reaction of chitosan and 2,3-epoxypropyltrimethyl ammonium chloride, and then NMA-HTCC is synthesized by the chemical reaction of HTCC and N-(hydroxymethyl) -acrylamide [6][7][8][9]. NMA-HTCC has a good antibacterial property, and can be used as cationic surface-active agent, metal ion flocculant ,and so on.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Cationic Chitosan Derivative Modified Bombyx mori

Minghui,

Wei,

Xinlan

et al. 2023

Fibres &Amp; Textiles in Eastern Europe

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Cationic modification of silk fabric can highly improve its antibacterial property, but cationic modification may change the microstructure of silk fiber, and further affect its properties, thus O-methyl acrylamide quaternary ammonium salt of chitosan (NMA-HTCC), which is a kind of strong cationic chitosan derivative, was used for the modification on Bombyx mori silk fiber. The combination structure between NMA-HTCC and silk fiber was characterized by FT-IR. The surface morphology and structure of silk fiber after being treated by NMA-HTCC were investigated by SEM and XPS analysis. The crystalline structure and thermal stability of silk fibers before and after being treated were determined by XRD and DSC analysis, respectively. Then the breaking strength, breaking elongation and antibacterial properties of the silk yarns were also determined. The results indicated that the NMA-HTCC modified silk fiber clearly showed two characteristic absorption peaks at 1535 cm-1 and 1670 cm-1 due to the N-H bending and C=O stretch of the secondary amide in the acrylamidomethyl group of the NMA-HTCC molecule. The successful combination of NMA-HTCC and silk fiber was also confirmed by XPS and SEM analysis. Compared with the untreated silk sample, the diffracted intensity of the characteristic absorption peak and crystallinity of the NMA-HTCC modified silk fiber were both increased; the internal aggregation structure of the silk fiber treated with NMA-HTCC was much closer and its thermal stability was enhanced obviously. The breaking strength and elongation of silk fibers after being treated with NMA-HTCC were also significantly increased. Silk fibers treated with NMA-HTCC had excellent durable antibacterial properties against S. aureus and E. coli, even after 50 repeated launderings, with the bacterial reduction rate of the silk fibers maintained at over 95 %. The results in this research can provide the theoretical basis for the application of NMA-HTCC in the modifications of silk fabric.

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Asynchronous fusion algorithm of highly maneuvering targets

Cited by 2 publications

References 7 publications

A Developed Jerk Sensor for Seismic Vibration Measurements: Modeling, Simulation and Experimental Verification

A Developed Jerk Sensor for Seismic Vibration Measurements: Modeling, Simulation and Experimental Verification

Structure and Properties of Cationic Chitosan Derivative Modified Bombyx mori

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