Pub Date : 2023-05-01DOI: 10.12968/s1479-7747(23)50043-x
{"title":"High-Speed Cameras","authors":"","doi":"10.12968/s1479-7747(23)50043-x","DOIUrl":"https://doi.org/10.12968/s1479-7747(23)50043-x","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135466406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the squeak and rattle (S&R) performance level of automotive interiors, the contact nonlinear characteristics of structural components need to be considered when performing interior noise analysis. The finite element model of S&R analysis of the interior assembly is built, and the time-domain vibration characteristics of the contact points between the interior panels are analyzed by applying external forced excitation. The interaction force between contact points is obtained according to the contact equivalent model between interior materials. The external excitation and internal interaction force are analyzed as the total excitation to obtain the response results. Through experimental verification, compared with the S&R performance division method, the analysis results are consistent with the test results. Based on this model, S&R risk optimization is carried out, and the risk level is significantly reduced. The research shows that the level of S&R performance can be accurately predicted by considering the nonlinear contact problem of the contact point in the S&R analysis of interior assembly, which has important guiding significance for the forward development and optimization design of automobile S&R performance.
{"title":"Squeak and Rattle Analysis of Automotive Interiors Considering\u0000 Contact Nonlinearity","authors":"Tianyi Li, Peiran Li, Dayong Jiang, B. Qiu","doi":"10.4271/10-07-02-0013","DOIUrl":"https://doi.org/10.4271/10-07-02-0013","url":null,"abstract":"In order to improve the squeak and rattle (S&R) performance level of\u0000 automotive interiors, the contact nonlinear characteristics of structural\u0000 components need to be considered when performing interior noise analysis. The\u0000 finite element model of S&R analysis of the interior assembly is built, and\u0000 the time-domain vibration characteristics of the contact points between the\u0000 interior panels are analyzed by applying external forced excitation. The\u0000 interaction force between contact points is obtained according to the contact\u0000 equivalent model between interior materials. The external excitation and\u0000 internal interaction force are analyzed as the total excitation to obtain the\u0000 response results. Through experimental verification, compared with the S&R\u0000 performance division method, the analysis results are consistent with the test\u0000 results. Based on this model, S&R risk optimization is carried out, and the\u0000 risk level is significantly reduced. The research shows that the level of\u0000 S&R performance can be accurately predicted by considering the nonlinear\u0000 contact problem of the contact point in the S&R analysis of interior\u0000 assembly, which has important guiding significance for the forward development\u0000 and optimization design of automobile S&R performance.","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"54 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74281635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan Zhang, Hangsheng Hou, Yusheng Yang, Jingting Feng, Z. Zhang
With higher customer expectations and advances in vehicular technology, automotive functions and operations are becoming more intelligent. Electric self-priming door locks fulfil the automatic closing and locking of side doors, hatchback doors, sliding doors, liftgates, decklids, etc. They are widely implemented into high-end models for the elegance of soft closing. In the list of perceived vehicle qualities, door-closing sound quality has been one of the important customer concerns in the market. In comparison to conventional door locks, electric self-priming door locks add another dimension to the development of sound quality for noise, vibration, and harshness (NVH) efforts. In this article, the characteristics of door-closing sound involving self-priming door lock mechanisms are analyzed and illustrated. Human perception of different sounds from the self-priming door lock working process is ranked by subjective evaluations. For typical door closing sounds associated with the self-priming lock mechanisms, i.e., the motor sound and rebound sound, real-case examples are discussed. A case of the buzzing noise issue due to the self-priming lock on a hatchback door is also presented. In these cases, the correlation between the sounds and the structure of the self-priming door locks is investigated and the root causes of the encountered issues are identified. The door closing sound quality associated with the self-priming door locks is improved in each case to meet the program requirements. In the particular cases presented in this work, the analysis involves psychoacoustic metrics for sound quality study originally. It is found later that sound pressure level can address the encountered issues, and thus only sound pressure level results are included.
{"title":"Analysis and Optimization of Automotive Self-Priming Door Lock\u0000 Closing Sound","authors":"Yan Zhang, Hangsheng Hou, Yusheng Yang, Jingting Feng, Z. Zhang","doi":"10.4271/10-07-02-0012","DOIUrl":"https://doi.org/10.4271/10-07-02-0012","url":null,"abstract":"With higher customer expectations and advances in vehicular technology,\u0000 automotive functions and operations are becoming more intelligent. Electric\u0000 self-priming door locks fulfil the automatic closing and locking of side doors,\u0000 hatchback doors, sliding doors, liftgates, decklids, etc. They are widely\u0000 implemented into high-end models for the elegance of soft closing. In the list\u0000 of perceived vehicle qualities, door-closing sound quality has been one of the\u0000 important customer concerns in the market. In comparison to conventional door\u0000 locks, electric self-priming door locks add another dimension to the development\u0000 of sound quality for noise, vibration, and harshness (NVH) efforts. In this\u0000 article, the characteristics of door-closing sound involving self-priming door\u0000 lock mechanisms are analyzed and illustrated. Human perception of different\u0000 sounds from the self-priming door lock working process is ranked by subjective\u0000 evaluations. For typical door closing sounds associated with the self-priming\u0000 lock mechanisms, i.e., the motor sound and rebound sound, real-case examples are\u0000 discussed. A case of the buzzing noise issue due to the self-priming lock on a\u0000 hatchback door is also presented. In these cases, the correlation between the\u0000 sounds and the structure of the self-priming door locks is investigated and the\u0000 root causes of the encountered issues are identified. The door closing sound\u0000 quality associated with the self-priming door locks is improved in each case to\u0000 meet the program requirements. In the particular cases presented in this work,\u0000 the analysis involves psychoacoustic metrics for sound quality study originally.\u0000 It is found later that sound pressure level can address the encountered issues,\u0000 and thus only sound pressure level results are included.","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"6 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80845875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sound quality assessments are an integral part of vehicle design. Especially now, as manufacturers move towards electrification, vehicle sounds are fundamentally changing. By improving the quality of the interior sounds of a vehicle, consumers’ subjective evaluation of it can be increased. Therefore, the field of psychoacoustics, which is the study of human perception of sound, is broadly applicable here. In fact, the perceived quality of a sound signal is influenced by several psychoacoustic indicators, including loudness, sharpness, and roughness. Of particular utility is identifying in advance how to distribute audible frequency content in a way that optimizes psychoacoustic metrics as this can help automotive engineers obtain specific design targets that optimize vehicle noise, vibration, and harshness (NVH). In this article, a novel modified gradient-based optimization technique (MGOT) is developed to optimize psychoacoustic loudness and sharpness. The new technique is applied to identify targeted adjustments to a measured vehicle interior sound signal that keep the signal energy constant but reduce loudness and/or sharpness. The MGOT numerically approximates the objective function gradient for small changes in the signal power distribution for which constant overall signal power is maintained. These gradient calculations identify power spectrum one-third octave band trades that minimize a sound signal metric that is a weighted sum of loudness and sharpness while conserving the total signal power. A trade consists of a reduction of power content from a one-third octave band designated as a source together with a simultaneous addition of that power to another receiver one-third octave band. In the MGOT, a one-third octave band that is at any time identified as a source can never later become a receiver of power. The MGOT results and execution times are compared with two widely available general-purpose optimization routines (a standard gradient-based optimizer and a “genetic,” non-gradient optimizer) are used to achieve identical optimization objectives. In comparison to existing optimization techniques, MGOT is found to identify spectrum modifications that produce a superior minimization of the objective function for comparable or even reduced execution times. The resultant sound spectrum modifications can guide vehicle structural or calibration design recommendations that realize a preferred frequency distribution for enhancing the vehicle driving experience.
{"title":"Constant Power Psychoacoustic Spectrum Optimization for Loudness and\u0000 Sharpness with Application to Vehicle Interiors","authors":"Yunge Li, Ryan Monroe, B. Geist","doi":"10.4271/10-07-02-0011","DOIUrl":"https://doi.org/10.4271/10-07-02-0011","url":null,"abstract":"Sound quality assessments are an integral part of vehicle design. Especially now,\u0000 as manufacturers move towards electrification, vehicle sounds are fundamentally\u0000 changing. By improving the quality of the interior sounds of a vehicle,\u0000 consumers’ subjective evaluation of it can be increased. Therefore, the field of\u0000 psychoacoustics, which is the study of human perception of sound, is broadly\u0000 applicable here. In fact, the perceived quality of a sound signal is influenced\u0000 by several psychoacoustic indicators, including loudness, sharpness, and\u0000 roughness. Of particular utility is identifying in advance how to distribute\u0000 audible frequency content in a way that optimizes psychoacoustic metrics as this\u0000 can help automotive engineers obtain specific design targets that optimize\u0000 vehicle noise, vibration, and harshness (NVH).\u0000\u0000 \u0000In this article, a novel modified gradient-based optimization technique (MGOT) is\u0000 developed to optimize psychoacoustic loudness and sharpness. The new technique\u0000 is applied to identify targeted adjustments to a measured vehicle interior sound\u0000 signal that keep the signal energy constant but reduce loudness and/or\u0000 sharpness. The MGOT numerically approximates the objective function gradient for\u0000 small changes in the signal power distribution for which constant overall signal\u0000 power is maintained. These gradient calculations identify power spectrum\u0000 one-third octave band trades that minimize a sound signal metric that is a\u0000 weighted sum of loudness and sharpness while conserving the total signal power.\u0000 A trade consists of a reduction of power content from a one-third octave band\u0000 designated as a source together with a simultaneous addition of that power to\u0000 another receiver one-third octave band. In the MGOT, a one-third octave band\u0000 that is at any time identified as a source can never later become a receiver of\u0000 power. The MGOT results and execution times are compared with two widely\u0000 available general-purpose optimization routines (a standard gradient-based\u0000 optimizer and a “genetic,” non-gradient optimizer) are used to achieve identical\u0000 optimization objectives. In comparison to existing optimization techniques, MGOT\u0000 is found to identify spectrum modifications that produce a superior minimization\u0000 of the objective function for comparable or even reduced execution times. The\u0000 resultant sound spectrum modifications can guide vehicle structural or\u0000 calibration design recommendations that realize a preferred frequency\u0000 distribution for enhancing the vehicle driving experience.","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"70 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86251996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of Sound and Vibration on Perceived Overall Ride Comfort—A\u0000 Comparison between an Electric Vehicle and a Combustion Engine\u0000 Vehicle","authors":"Xiaojuan Wang, A. Osvalder, Patrik Höstmad","doi":"10.4271/10-07-02-0010","DOIUrl":"https://doi.org/10.4271/10-07-02-0010","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"17 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82656128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Using an Inerter-Based Suspension to Reduce Carbody Flexible\u0000 Vibration and Improve Riding-Comfort","authors":"X. He, Jing Chen, D. Tang, S. Peng, B.B. Tang","doi":"10.4271/10-07-02-0009","DOIUrl":"https://doi.org/10.4271/10-07-02-0009","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"156 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76753603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Zhang, V. Nguyen, Chunxia Wang, Shaoyong Xu, Haitao Li
{"title":"Review Research on Isolation Systems of the Cab and Driver’s Seat in\u0000 Soil Compactors","authors":"Li Zhang, V. Nguyen, Chunxia Wang, Shaoyong Xu, Haitao Li","doi":"10.4271/10-07-02-0008","DOIUrl":"https://doi.org/10.4271/10-07-02-0008","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89452392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Validation of a High-Level Controller for Automotive\u0000 Active Systems","authors":"Henrique de Carvalho Pinheiro, M. Carello","doi":"10.4271/10-07-01-0006","DOIUrl":"https://doi.org/10.4271/10-07-01-0006","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"20 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91167188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simulation Analysis of Automatic Emergency Braking System under\u0000 Constant Steer Conditions","authors":"Fei Lai, C. Huang, Chengyue Jiang, Yong Zhang","doi":"10.4271/10-06-04-0030","DOIUrl":"https://doi.org/10.4271/10-06-04-0030","url":null,"abstract":"","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"12 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84308928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-01DOI: 10.12968/s1479-7747(23)50004-0
The Purosangue is not just Ferrari's first four-door car; it is the launchpad for a new chassis and several dynamics innovations, from active suspension to intelligent control systems
{"title":"Ferrari Purosangue","authors":"","doi":"10.12968/s1479-7747(23)50004-0","DOIUrl":"https://doi.org/10.12968/s1479-7747(23)50004-0","url":null,"abstract":"The Purosangue is not just Ferrari's first four-door car; it is the launchpad for a new chassis and several dynamics innovations, from active suspension to intelligent control systems","PeriodicalId":42978,"journal":{"name":"SAE International Journal of Vehicle Dynamics Stability and NVH","volume":"54 12 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78332141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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