Your Selections

Doors
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

Magazine

 
new

A Study on Door Clips and Their Influence on BSR Performance

Mahindra & Mahindra, Ltd.-Riyazuddin Mohammed, Prasath Raghavendran, Naresh Chaudhari, Amit Kumar
Published 2019-06-05 by SAE International in United States
Squeak and rattle concerns account for approximately 10% of overall vehicle Things Gone Wrong (TGW) and are major quality concern for automotive OEM’s. Objectionable door noises are one of the top 10 IQS concerns under any OEM nameplate. Door trim significantly contributes to overall BSR quality perception. Door trim is mounted on door in white using small plastic clips with variable properties that can significantly influence BSR performance. In this paper, the performance of various door clips is evaluated through objective parameters like interface dynamic stiffness and system damping. The methodology involves a simple dynamic system for the evaluation of the performance of a clip design. Transmissibility is calculated from the dynamic response of a mass supported by clip. Parameters such as interface stiffness and system damping are extracted for each clip design. Variation of inner panel thickness is also considered when comparing clip performance. In a second step, clip characteristics are transferred to an equivalent finite element model to predict the response of mass supported by clip. The equivalent clip model is compared with…
Datasets icon
Annotation icon
 
new

Door Closure Sound Quality Engineering Process

Bruel & Kjaer North America, Inc.-Todd Freeman
Brüel & Kjaer Sound And Vibration A/S-Bret Engels
Published 2019-06-05 by SAE International in United States
An important factor contributing to a customer’s subjective perception of a vehicle, particularly at the point-of-purchase, is the sound created by the passenger doors during closure events. Although these sounds are very short in duration the key systems that control the sounds produced can be highly coupled. Similarly, the necessary efforts required to understand key design criteria affecting the sound can also be highly complex.Within this paper sub-systems affecting the door closure sound are evaluated to understand key structural properties and behaviors toward the contribution to the overall sound produced. This begins with the subjective preferences of typical sounds and the difficulties with both measuring and reproducing these sounds appropriately and leads directly to the target setting and target cascading process. With targets in place, it becomes important to link them with physical measurements of the vehicle and door system to identify the key controlling mechanisms that can be affected through design.The behavior of the door system during a closure event is key for the sound produced and can be studied to understand both the…
Annotation icon
 
new

Sound Quality Prediction Modelling for the Transient Sound of Vehicle Door Latch Closure

Tongji University-Chang Jin, Tianpeng Zhang, Liying Ma, Tao Zhang, Yi Zhou
Published 2019-06-05 by SAE International in United States
Door latch closure noise has contribution on sound quality of vehicle door slam sound. This paper focuses on the modelling of sound quality for door latch closure sound. 24 various latch closure sound samples were recorded to be evaluated subjectively. A novel Dynamic Paired Comparison Method (DPCM) was introduced for subjective evaluation. By eliminating the redundant comparison pairs the DPCM dramatically reduced the evaluation work load comparing to the traditional Paired Comparison Method (PCM). Correlation between subjective evaluation results and psychoacoustic metrics was analyzed to find out the most relevant metrics as inputs for the subsequent prediction model. Besides, the shudder effect induced by multi-impact of latch components during closing movement was also found strongly affecting the subjective perception of door latch closure sound. Therefore, a new metric Shudder Level which is graded in 3 levels describing this shudder effect was developed and then quantified as one of the model inputs. The sound quality of door latch closure was modeled by means of Multi-Linear Regression Function (MLRF) both with and without the Shudder Level. The…
Datasets icon
Annotation icon
 
new

Getting driverless trucks onto roadways

SAE Truck & Off-Highway Engineering: June 2019

based on exclusive interview with TuSimple's Chuck Price-Terry Costlow
  • Magazine Article
  • 19TOFHP06_03
Published 2019-06-01 by SAE International in United States

Autonomous developers at TuSimple address many technical issues, but they also must consider regulations and operating modes.

The developers who are creating autonomous systems have plenty of complex technical questions that must be analyzed and solved, but their challenges don't stop there. Design teams also have to plan for the use cases of driverless vehicles, even going so far as to plan for what might happen if the vehicle has to sacrifice itself to avoid a serious accident.

Annotation icon
 
new

Mixture Distributions in Autonomous Decision-Making for Industry 4.0

SAE International Journal of Materials and Manufacturing

Oakland University, USA-Christopher Slon, Vijitashwa Pandey, Sam Kassoumeh
  • Journal Article
  • 05-12-02-0011
Published 2019-05-29 by SAE International in United States
Industry 4.0 is expected to revolutionize product development and, in particular, manufacturing systems. Cyber-physical production systems and digital twins of the product and process already provide the means to predict possible future states of the final product given the current production parameters. With the advent of further data integration coupled with the need for autonomous decision-making, methods are needed to make decisions in real time and in an environment of uncertainty in both the possible outcomes and in the stakeholders’ preferences over them. This article proposes a method of autonomous decision-making in data-intensive environments, such as a cyber-physical assembly system. Theoretical results in group decision-making and utility maximization using mixture distributions are presented. This allows us to perform calculations on expected utility accurately and efficiently through closed-form expressions, which are also provided. The practical value of the method is illustrated with a door assembly example and compared to traditional random assembly methods and results.
 

Steel stands TALL

Automotive Engineering: May 2019

Lindsay Brooke
  • Magazine Article
  • 19AUTP05_01
Published 2019-05-01 by SAE International in United States

Mobility's longtime incumbent material maintains its star status for vehicle structures through constant innovation-and a collaborative development model.

In 2014, just before Ford shook the industry with the introduction of its aluminum-intensive F-150, Ducker Worldwide released a study for the aluminum industry. The report predicted that the light metal would dominate the North American light-truck segment in the next new-model development cycle. Some seven out of ten pickups in the next round were going to be AL-intensive, the study opined. A tidal wave appeared to be building.

Annotation icon
 

A Study of Design Methodology to Develop Improved Door System of a Vehicle

Hyundai Motor Company-Je-Won Choi
Published 2019-04-02 by SAE International in United States
In the past few years, technological innovations in the automobile industry took vehicle performance to the next level. One such innovation is frame integrated panel door. This type of door helps automobile companies to have the advantages of both conventional panel and frame type doors. Though it has a good number of advantages, there are some drawbacks too. It requires improvements in its quality, NVH performance, weight and etc. Quality of a door is low due to the limitations in structural design and manufacturing technologies. And it is difficult to have a robust structure which leads to degradation of key performing factors such as NVH. For a lightweight vehicle, it is important to design an optimized structure for saving weight, without compromising its performance. In order to overcome these drawbacks a new optimized design structure is required for door system. This Research paper is about a systematic design methodology for Development of a new optimized door structural design by a comprehensive engineering design analysis of existing design constrains and drawbacks. The design methodology is described…
Datasets icon
Annotation icon
 

Novel Glass Laminates for Improved Acoustic Performance

Ford Motor Co Ltd-Chester Walawender, Sanjay Abhyankar
Vitro-Michael Ulizio, DeWitt Lampman
Published 2019-04-02 by SAE International in United States
Noise, Vibration, and Harshness (NVH) performance of vehicles is an all-encompassing study of hearing and feeling vibration as it relates to end user experience. The collection of glass in a vehicle can represent a large surface area, and can have a significant effect on NVH performance. Some of the most important glazing positions in relationship to the driver are the front doors, due to the proximity to the driver. Novel glass laminate constructions can provide acoustic improvement for these body positions over typically used standard glazings. The performance of these constructions will be discussed in terms of: acoustics, glass closing and door slam survivability, and solar performance.
Datasets icon
Annotation icon
 

Development of the Wireless Power Transfer Technology for a Sliding Door

Hyundai Motor Co.-MyoungKwon Je, Jae Kyu Lee, Jae Hong Choi, Hyung In Yun, KeunSoo Kim
Published 2019-04-02 by SAE International in United States
The sliding door’s movement is 3-dimensional unlike the conventional door. So the electric power and signal are exchanged via the long ‘Power Cable’. It has a quite complex structure in order to be suitable to connect the vehicle’s body and the sliding door even during it’s moving. As the result, it is more expensive than conventional door’s one and the quality could not be guaranteed easily. In this paper, I have developed new technology which could transfer electric power by ‘wireless transfer’ in order to resolve the problem from using ‘Power cable’. I would propose the proper structure to transfer the electric power at any position of the sliding door without any physical connection. To transfer the electric power which drives the window regulator and the actuators in door, I have applied the ‘inductive coupling’ system. And in order to decide the engineering properties - such as the dimensions of the core, the values of the electric elements and the frequency of the transferred electricity - a myriad of computer analysis and experiments under various…
Datasets icon
Annotation icon
 

CFD-Simulation and Validation of Cabin Pressure during Door Closing Motions

Ford Motor Company-Mallikarjun Sukumar, Sunil Patil
Ford Werke GmbH-Andreas Cousin, Marc Seggern
Published 2019-04-02 by SAE International in United States
Under the competitive pressure of automotive industry the customer’s focus is on a vehicle’s quality perception. Side door closing efforts make a considerable share of the overall impression as the doors are the first physical and haptic interface to the customer. Customer’s subjective feeling of vehicle quality demands for detailed analysis of each contributor of door closing efforts. Most contributors come from kinematic influences. Beside the losses due to mechanical subsystems like the checkarm, latch or hinge friction one of the biggest impacts originates from the pressure spike that builds up due to air being pushed into the cabin. Subject of this publication is to discuss the dependencies of closing efforts on cabin pressure and air extraction. It demonstrates an approach to simulate the development of the air pressure during door closing motions and the validation of the simulation method with the “EZ-Slam” measurement device. In order to produce a correlation between simulation and reality a simplified model of a vehicle cabin is created. The validation tests are conducted on a physical test rig, built…
Datasets icon
Annotation icon