Dynamics and Vibration Measurements in Engines

Ahirrao, Nilesh; Bhosle, Santosh; Nehete, D.V.

doi:10.1016/j.promfg.2018.02.063

Cited by 40 publications

(22 citation statements)

References 13 publications

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“…The secondary inertial forces from of ±10% and it can measure frequencies ranges from 0.5 to 15000 Hz. Its main advantages include that it has no compression, and high frequency domain and precision (Ahirrao et al, 2018). The vibrometer connection was performed magnetically -there is no loosing between vibrometer and engine body, and the connecting place was fully clear.…”

Section: Laboratory Results Of Balancer Performance In Different Speementioning

confidence: 99%

Studying the Effect of Balancer on Engine Vibration of Massey Ferguson 285 Tractor

Zanganeh

Shahgholi

Agh

2021

Acta Technologica Agriculturae

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The mechanical vibration causes health issues to drivers, such as backache, spinal cord injury, etc. In this regard, a tractor engine plays important role. Tractors without chassis are equipped with a balancer unit reducing the secondary engine vibrating force and decreasing the engine and tractor vibration. The paper presented investigates the effects of balancer on secondary vibration. In this research, the root mean square (RMS) of vibration was computed for specific periods of engine work. Effects of rotational speed and engine load on engine vibration in two modes with and without balancer were investigated. The results showed that, at full engine load, increasing the engine speed resulted in increasing the vibration in both observed modes. Balancer utilization reduced the vibration by 22.3% on average. At fixed rotational speed, increasing load caused an increase in vibration in both observed modes. At 1400 rpm rotational speed and 125 Nm torque, balancer utilization managed to reduce the RMS of secondary vibration by 38.9%. Furthermore, at 250 Nm, RMS vibrations were reduced by 21.3% in comparison to no balancer mode. At full load, variable rotational speed, the balancer significantly reduced vibration by 29% on average. The balancer proved to be more efficient at lower torques.

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Section: Laboratory Results Of Balancer Performance In Different Speementioning

confidence: 99%

Studying the Effect of Balancer on Engine Vibration of Massey Ferguson 285 Tractor

Zanganeh

Shahgholi

Agh

2021

Acta Technologica Agriculturae

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“…The FFT is an algorithm developed to improve the computational efficiency of the discrete Fourier transform (DFT), being a popular method used in spectral analysis and digital signal processing. Ahirrao et al [57] used the FFT in the analysis of the vibration and dynamics of engines. Kang et al [58] used the FFT in the tool condition analysis and monitoring of the micro-lens fabrication process.…”

Section: Rms and Counts In Ae Signal Processingmentioning

confidence: 99%

A Novel Ultrasound Technique Based on Piezoelectric Diaphragms Applied to Material Removal Monitoring in the Grinding Process

Alexandre

Aguiar

Götz

et al. 2019

Sensors

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The interest of the scientific community for ultrasound techniques has increased in recent years due to its wide range of applications. A continuous effort of researchers and industries has been made in order to improve and increase the applicability of non-destructive evaluations (NDE). In this context, the monitoring of manufacturing processes, such as the grinding process, arises. This work proposes a novel technique of ultrasound monitoring (chirp-through-transmission) through low-cost piezoelectric diaphragms and digital signal processing. The proposed technique was applied to the monitoring of material removal during the grinding process. The technique is based on changes in ultrasonic waves when propagated through the material under study, with the difference that this technique does not use traditional parameters of ultrasonic techniques but digital signal processing (RMS and Counts). Furthermore, the novelty of the proposed technique is also the use of low-cost piezoelectric diaphragms in the emission and reception of ultrasonic waves, enabling the implementation of a low-cost monitoring system. The results show that the monitoring technique proposed in this work, when used in conjunction with the frequency band selection, is sensitive to the material removal in the grinding process and therefore presents an advance for monitoring the grinding processes.

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“…In both cases, there are very clear 2 of 13 legal regulations. Therefore, it is impossible not to test the vibrations of the machine or the vehicle, and especially the engine, which makes up the basic component of the drive system [9,10]. Engine vibrations are natural because they result mainly from the cyclic nature of the combustion process.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Diesel Engine Vibroacoustic Properties Powered by Bio and Standard Fuel

et al. 2021

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Alternative fuels appeared soon after the first internal combustion engines were designed. The history of alternative fuels is basically as long as the history of the automotive industry. Initially, fuels whose physicochemical properties allowed for a change in parameters of the combustion process in order to achieve greater efficiency and reliability were searched for. Nowadays, there are significantly more variables; in addition to the above mentioned parameters, alternative fuels are being sought that will ensure environmental protection during vehicle operation and improve the ergonomics of use. This article outlines the results of the authors’ own comparative tests of vibrations of a vibroacoustic character. Based on a popular engine model, the vibration–acoustic responses of a system powered by two types of fuel, namely, diesel and biodiesel (B10), are compared. The research consists of comparing vibrations in both time and frequency domains. In the case of the time domain, the evaluation was performed with vibrations as a function of engine torque and speed. In the case of frequency analysis, the focus was on changes in the frequency response for the tested fuels. The research shows that the profile of vibroacoustic vibrations changes in the case of biodiesel power supply in relation to standard fuel. The vibration profile changes significantly as a function of speed and only slightly in relation to the engine load. The results presented in this article show different vibroacoustic responses of an engine powered by diesel and biodiesel; the change is minor for lower speeds but significant (other harmonics are dominant) for higher speeds (changes in the dominant harmonic magnitude of up to 10% at a crankshaft speed of 3000 rpm).

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Dynamics and Vibration Measurements in Engines

Cited by 40 publications

References 13 publications

Studying the Effect of Balancer on Engine Vibration of Massey Ferguson 285 Tractor

Studying the Effect of Balancer on Engine Vibration of Massey Ferguson 285 Tractor

A Novel Ultrasound Technique Based on Piezoelectric Diaphragms Applied to Material Removal Monitoring in the Grinding Process

Comparison of Diesel Engine Vibroacoustic Properties Powered by Bio and Standard Fuel

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