Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts
The precise measurement of crankshaft torsional vibration is critical for diesel engine reliability, yet it is often compromised by systematic errors from toothed disc runout. To address this challenge, this paper elucidates the dual mechanism of these errors, which manifest as micro-level voltage f...
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MDPI AG
2025-06-01
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| author | Chenghao Qi Zhongxu Tian |
| author_facet | Chenghao Qi Zhongxu Tian |
| author_sort | Chenghao Qi |
| collection | DOAJ |
| description | The precise measurement of crankshaft torsional vibration is critical for diesel engine reliability, yet it is often compromised by systematic errors from toothed disc runout. To address this challenge, this paper elucidates the dual mechanism of these errors, which manifest as micro-level voltage fluctuations in signal and macro-level time-domain deviations. Based on this understanding, a composite compensation method is proposed. First, a dual-line approximation method is presented for preprocessing the raw sensor signals, aiming to eliminate the distortion in rotational speed calculations caused by anomalous voltages. Second, a synchronous sampling scheme based on the differential measurement principle is developed. This scheme utilizes a symmetrically arranged dual-sensor structure to suppress runout errors and is combined with a time-domain feature reconstruction technique to restore the true rotational speed signal. Validation on a custom-built universal joint torsional vibration test rig demonstrates that the proposed method can effectively eliminate systematic deviations arising from toothed disc runout, thereby significantly enhancing the accuracy of torsional vibration measurements. The measurement method presented in this paper offers a valuable reference for the high-precision measurement of engine torsional vibration characteristics. |
| format | Article |
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| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-cc7052966c6640a9bed7b7159c4db73e2025-08-20T03:50:16ZengMDPI AGApplied Sciences2076-34172025-06-011513735510.3390/app15137355Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine CrankshaftsChenghao Qi0Zhongxu Tian1College of Engineering Science and Technology, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Engineering Science and Technology, Shanghai Ocean University, Shanghai 201306, ChinaThe precise measurement of crankshaft torsional vibration is critical for diesel engine reliability, yet it is often compromised by systematic errors from toothed disc runout. To address this challenge, this paper elucidates the dual mechanism of these errors, which manifest as micro-level voltage fluctuations in signal and macro-level time-domain deviations. Based on this understanding, a composite compensation method is proposed. First, a dual-line approximation method is presented for preprocessing the raw sensor signals, aiming to eliminate the distortion in rotational speed calculations caused by anomalous voltages. Second, a synchronous sampling scheme based on the differential measurement principle is developed. This scheme utilizes a symmetrically arranged dual-sensor structure to suppress runout errors and is combined with a time-domain feature reconstruction technique to restore the true rotational speed signal. Validation on a custom-built universal joint torsional vibration test rig demonstrates that the proposed method can effectively eliminate systematic deviations arising from toothed disc runout, thereby significantly enhancing the accuracy of torsional vibration measurements. The measurement method presented in this paper offers a valuable reference for the high-precision measurement of engine torsional vibration characteristics.https://www.mdpi.com/2076-3417/15/13/7355torsional vibrationrunout interferencediesel engine crankshaftsynchronous sampling |
| spellingShingle | Chenghao Qi Zhongxu Tian Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts Applied Sciences torsional vibration runout interference diesel engine crankshaft synchronous sampling |
| title | Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts |
| title_full | Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts |
| title_fullStr | Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts |
| title_full_unstemmed | Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts |
| title_short | Strategies for Mitigating Runout Interference in Torsional Vibration Measurement of Diesel Engine Crankshafts |
| title_sort | strategies for mitigating runout interference in torsional vibration measurement of diesel engine crankshafts |
| topic | torsional vibration runout interference diesel engine crankshaft synchronous sampling |
| url | https://www.mdpi.com/2076-3417/15/13/7355 |
| work_keys_str_mv | AT chenghaoqi strategiesformitigatingrunoutinterferenceintorsionalvibrationmeasurementofdieselenginecrankshafts AT zhongxutian strategiesformitigatingrunoutinterferenceintorsionalvibrationmeasurementofdieselenginecrankshafts |