Analysis of Frequency and Time Characteristics of the Vibration Acceleration Signal of Traction Electric Motor of Motor Car

Vyplaven, Vladimir; Kolomeets, Andrey; Popkov, A. A.

doi:10.1007/978-3-030-96383-5_35

Cited by 1 publication

(3 citation statements)

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“…The displacement maintains a harmonic profile at low excitation levels. Higher voltage and greater SNR are obtained because of increase of range of motion of the TENG using the dome-shaped structure, which increased the initial height from 2 μm in our previous work [1] to 20 μm in the present study. Also, the engagement of the periphery of the dome-shaped structure with the underneath polyimide increases 𝜎 t in Equation ( 23), which further increases the output voltage and the SNR.…”

Section: Analytical Modelingsupporting

confidence: 49%

“…where x(t) denotes the displacement of the MEMS-TENG center from the initial state Figure 2d, and m is the equivalent mass in Equation (1). Considering the MEMS-TENG position in Figure 2d as the initial position of the diaphragm, in the pres-ence of a harmonic external vibration, the diaphragm displacement toward the substrate is greater than the motion away from it.…”

Section: Mechanism Description and Modelingmentioning

confidence: 99%

“…For example, a diagnostic method for potential mechanical failure in car components is based on measuring the vibrations on the gear housing and the gear backlash. [1,2] Safety of mechanical motors can be ensured by integrating vibration and temperature sensors, which reduce the motor speed if threshold values are exceeded. [3] The common methods used for motion sensing are capacitive, electromagnetic, piezoelectric, electret, and triboelectric sensing.…”

Section: Introductionmentioning

confidence: 99%

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High Signal‐to‐Noise Ratio Event‐Driven MEMS Motion Sensing

Mousavi,

Alzgool,

Davaji

et al. 2023

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Two solutions for improving MEMS triboelectric vibration sensors performance in contact‐separation mode are reported experimentally and analytically. Triboelectric sensors have mostly been studied in the mesoscale. The gap variation between the electrodes induces a potential difference that represents the external vibration. Miniaturizing the device limits the sensor output because of the limited gap. This work offers a warped MEMS diaphragm constrained on its edges. The dome‐shaped structure provides one order of magnitude larger displacement after contact‐separation than standard designs resulting in one order of magnitude greater voltage and signal‐to‐noise‐ratio. Second, micro triboelectric sensors do not operate unless the external vibration is sufficiently forceful to initiate contact between layers. The proposed constraints on the edge of the diaphragm provide friction during periodic motion and generate charges. The combination of the warped diaphragm and boundary constraints instead of serpentine springs increases the charge density and voltage generation. The mechanical properties and electrical output are thoroughly investigated including nonlinearity, sensitivity, and signal‐to‐noise ratio. A sensitivity of 250 mV g−1 and signal‐to‐noise‐ratio of 32 dB is provided by the presented device at resonance, which is very promising for event‐driven motion sensors because it does not require signal conditioning and therefore simplifies the sensing circuitry.

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Section: Analytical Modelingsupporting

confidence: 49%

Section: Mechanism Description and Modelingmentioning

confidence: 99%