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Preliminary Study of Perceived Vibration Quality for Human Hands

Bruel & Kjaer North America, Inc.-Edward Green, Sophie Kaye
Kettering University-Jennifer M. Bastiaan
  • Technical Paper
  • 2019-01-1522
To be published on 2019-06-05 by SAE International in United States
A large body of knowledge exists regarding the effects of vibration on human beings; however, the emphasis is generally on the damaging effects of vibration. Very little information has been published regarding the effect of vibration on perceived consumer product quality. The perceived loudness of a product is quantified using the Fletcher-Munson equal loudness curves, but the equivalent curves for perceived vibration amplitude as a function of amplitude and frequency are not readily available. This “vibration quality” information would be valuable in the design and evaluation of many consumer products, including automobiles. Vibration information is used in the automobile design process where targets for steering wheel, seat track, and pedal vibration are common. For this purpose, the vibration information is considered proprietary and is generally applicable to a narrow frequency range. In this investigation, work paralleling the original Fletcher-Munson study is presented. “Equal comfort curves” for vibration were measured and developed for hands grasping a handlebar. A paired-comparison test methodology was used to establish an equivalency of perceived vibration comfort for vibration in a wide…
 
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Aerospace Hand Torque Wrenches (Mechanical, Impulse)

EG-1B Hand Tools Committee
  • Aerospace Standard
  • AS28431A
  • Current
Published 2019-05-10 by SAE International in United States
This SAE International Aerospace Standard covers requirements for micrometer adjustable, feel impulse, torque wrenches. The torque wrench is used to apply a pre-set torque to threaded fasteners and other torque requirements.
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Crimp Tools, Type 1, Hand or Power, Actuated, Wire Termination, Hydraulic Tool, for Wire Barrel Sizes 0000 through 8

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS22520/48
  • Current
Published 2019-05-07 by SAE International in United States

Scope is unavailable.

 

Instrumented Steering Wheel for Accurate ADAS Development

Politecnico di Milano-Gianpiero Mastinu, Massimiliano Gobbi, Francesco Comolli
Toyota Central R&D Labs-Masatoshi Hada
Published 2019-04-02 by SAE International in United States
We introduce in this paper a new Instrumented Steering Wheel (ISW) for ADAS development. The ISW has been designed, constructed and employed with satisfactory results. The ISW is able to measure three forces, three moments and the grip force at each hand of the driver. The ISW has been used for ADAS activities on an instrumented road vehicle. The aim was to use both the vehicle states and the ISW data for evaluating the driver behaviour. Two research activities were performed. The first activity refers to monitoring the driver behaviour during tests on a track. The second activity refers to the use of haptic ISWs, able to improve the ADAS systems.Referring to the first activity, the greatest majority of drivers applied always the same sequence of forces (pull, radial, tangential) either during emergency manoeuvres, either during slow speed curving.Referring to the second activity, we found that, by exploiting an ISW, the driver steering purpose could be inferred, before the steering wheel is rotated.
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Automotive Gigabit Ethernet Press-Fit Header Design and Performance

TE Connectivity Corporation-Guadalupe Chalas
Published 2019-04-02 by SAE International in United States
As the demand for Gigabit Automotive Ethernet based on single unshielded twisted pair continues to increase, there is a need to expand the market to include robust automotive grade solderless technology. The new Automotive Ethernet solution features Automotive press fit contacts that can both handle the harsh environments of the application and be applied to the PCB without the need for a soldering process. The solution at hand performs up to 1Gbps speeds without the need for current product plastic header housing redesign, which makes the solution compatible with its through-hole counterpart. Other advantages of a solderless solution include the increase in the amount of materials that can suit the application once the temperature requirements of the system decrease. Also, the smaller diameter PCB vias required for press fit applications and lack of variability in solder amounts, yield a connector whose differential impedance is better matched and can potentially achieve higher data rates. This paper explores the design advantages of switching to a solderless approach for twisted pair ethernet as well as the challenges of…
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Investigating Collaborative Robot Gripper Configurations for Simple Fabric Pick and Place Tasks

University of Windsor-Morteza Alebooyeh, Bowen Wang, Ruth Jill Urbanic, Hamed Kalami
Wayne State University-Ana Djuric
Published 2019-04-02 by SAE International in United States
Fiber composite materials are widely used in many industrial applications - specially in automotive, aviation and consumer goods. Introducing light-weighting material solutions to reduce vehicle mass is driving innovative materials research activities as polymer composites offer high specific stiffness and strength compared to contemporary engineering materials. However, there are issues related to high production volume, automation strategies and handling methods. The state of the art for the production of these light-weight flexible textile or composite fiber products is setting up multi-stage manual operations for hand layups. Material handling of flexible textile/fiber components is a process bottleneck. Consequently, the long term research goal is to develop semi-automated pick and place processes for flexible materials utilizing collaborative robots within the process. Collaborative robots allow for interactive human-machine tasks to be conducted. The immediate research is to assess standard and modified grippers for basic material pick and place tasks via sets of experimental tasks. Pick and place experiments with flat carbon fiber fabric and two gripper configurations are tested with a YuMi 14000 ABB collaborative robot to determine…
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Collaborative Robotic Fastening Using Stereo Machine Vision

Electroimpact Inc.-Ryan Haldimann
Published 2019-03-19 by SAE International in United States
With typically over 2.3 million parts, attached with over 3 million fasteners, it may be surprising to learn that approximately two out of every three fasteners on a twin aisle aircraft are fastened by hand. In addition the fasteners are often installed in locations designed for strength and not necessarily ergonomics. These facts lead to vast opportunities to automate this tedious and repetitive task. The solution outlined in this paper utilizes the latest machine vision and robotics techniques to solve these unique challenges. Stereo machine vision techniques find the fastener on the interior of an aerospace structure and calculate the 6DOF (Degrees of Freedom) location in less than 500ms. Once the fastener is located, sealed, and inspected for bead width and gaps, a nut or collar is then installed. Force feedback capabilities of a collaborative robot are used to prevent part damage and ensure the nut or collar are properly located on the fastener. This type robot also opens up the possibility of interacting more closely with humans as fastening can be done simultaneously with…
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The Auto-Generation of Calibration Guides from MATLAB® Simulink®

Delphi Corporation-William Allen
Delphi Technologies Inc.-Bharath Sundar
Published 2019-03-19 by SAE International in United States
With the inception of model-based design and automatic code generation, many organizations are developing controls and diagnostics algorithms in model-based development tools to meet customer and regulatory requirements. Advances in model-based design have made it easier to generate C code from models and help software engineers streamline their workflow. Typically, after the software has been developed, the models are handed over to a calibration team responsible for calibrating the features to meet specified customer and regulatory requirements. However, once the models are handed over to the calibration team, the calibration engineers are unaware of how to calibrate the features because documentation is not available. Typically, model documentation trails behind the software process because it is created manually, most of this time is spent on formatting. As a result, lack of model documentation or up-to date documentation causes a lot of pain for OEM’s and Tier 1 suppliers. This paper will explore the auto-generation of documentation from Simulink® models. The format and contents of the auto-generated document will be reviewed in this paper. This paper will…
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Restricted Access ‘C’ Clamping Smart Drilling Unit

Manufacturing Technology Centre-Agata Suwala, Patrick Land, Karol Janik, Richard Kasler
Published 2019-03-19 by SAE International in United States
One way assembly of aero structures has the potential to significantly reduce build times. One of the solutions, which goes towards achieving this philosophy, is the use of a ‘C’ clamping automated drilling system. The Manufacturing Technology Centre has developed and manufactured a ‘C’ clamping automated drilling unit to overcome many of the limitations of current designs, which prevent their use on a broader range of structures. The drilling unit addresses issues with access, size and weight restrictions as well as economic factors.This technical paper will present the outcomes from the design and manufacture of the drilling unit that is to be used within restricted access areas, as either a hand held device or as a robotic end effector free from any cables or hoses, allowing full and unhindered articulation of any robot motion. The device’s services: power, tool lubrication, swarf extraction and control systems have been designed to be embedded, rendering it a standalone unit. With the miniaturisation of the electrical and mechanical elements, combined with a deep throat, high clamping force and innovative…
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CRIMPING TOOLS, TYPE I, TERMINAL, HAND, WIRE TERMINATION FOR WIRE BARREL SIZES 12 THROUGH 22 AND COAXIAL INNER CONTACTS

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS22520/1B
  • Current
Published 2019-03-18 by SAE International in United States
No Abstract Available.
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