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TL;DR: In this article, a wavelet transform was applied to two physical parts and a simulation model to detect the presence of hollows in a skin panel and the ability of an observer to perceive the defect.
Abstract: Cosmetic defects such as ‘hollows’ are the result of deviations in a skin panel. These deviations are usually too small and local to be detected by discrete measurements of the panel but become visually apparent after the application of paint. As a result, the perceived quality of a panel may become unacceptable and considerable time may be dedicated to minimizing their occurrence through tool modifications. This paper proposes that there are three aspects to the problem: the springback or buckling of the panel, the optics of the painted panel and the ability of an observer to perceive the defect. In particular, it will be argued that hollows cause optical distortions that inform the human eye of the presence of a defect. The paper then suggests that signal processing techniques, in particular the wavelet transform, provide a simple way of locating and quantifying the severity of these defects. The transform was applied to two physical parts and a simulation model.
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14 Apr 2015•
25 Apr 2006TL;DR: In this article, a method for inhibiting automatic actuation of an electric parking brake (EPB) system of a motor vehicle is disclosed, in which the driver has to complete within a specific time period the cycle of turning the ignition from off to on to off, pressing and maintaining the EPB control switch into the brake release position, removing the ignition key and releasing the EBP control switch after at least a predetermined time period.
Abstract: A method for inhibiting automatic actuation of an electric parking brake (EPB) system of a motor vehicle is disclosed. The vehicle has an ignition switch for receiving an ignition key so as to mobilize or immobilize the vehicle. The EPB system includes an EPB mechanism for applying an actuating force to a park brake of the vehicle, an EPB control module for automatically applying the force when at least the ignition key is detected as removed from the ignition switch and an EPB control switch. The EPB control switch can be moved towards two instable positions from a neutral position respectively a brake release position and a brake apply position so as to apply or release the park brake. To inhibit the automatic actuation of the park brake, the driver has to complete within a specific time period the cycle of turning the ignition from off to on to off, pressing and maintaining the EPB control switch into the brake release position, removing the ignition key and releasing the EPB control switch after at least a predetermined time period. Such cycle of actions will be interpreted by the EPB control module as a wish to not apply the park brake.
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12 Apr 2010TL;DR: It is proven that the developed door lock model in Dymola can be built and executed on a multiprocessor platform and there is much potential on the use of such models for future work in ECU testing.
Abstract: An automotive side door latch release mechanism has been modelled for the locking and unlocking vehicle functionality in Dymola. The performance of the developed door lock model is evaluated against an existing model of a similar door locking/unlocking system in Stateflow. The model performance is also compared with measurements from a real vehicle door latch. The model is converted into a Simulink model and built for a realtime environment such as the dSPACE target with a fixed step size solver. It is shown that a step size as small as 1 ms can be used for real-time simulation without task overrunning in the real-time target. The model is also benchmarked on a multiprocessor setup as multiprocessor simulators are common in system-level networked Electronic Controller Unit (ECU) testing facilities for implementing high fidelity closed loop models of integrated ECUs and actuators. It is proven that the developed door lock model in Dymola can be built and executed on a multiprocessor platform and there is much potential on the use of such models for future work in ECU testing.
Authors
Showing all 117 results
Name | H-index | Papers | Citations |
---|---|---|---|
Kevin Talbot | 71 | 268 | 15669 |
Lee Skrypchuk | 16 | 105 | 877 |
Phil Barber | 16 | 49 | 1011 |
Alexandros Mouzakitis | 13 | 61 | 900 |
Thuy-Yung Tran | 13 | 40 | 422 |
Gael Henri Chouchelamane | 12 | 13 | 628 |
Carl Anthony Pickering | 12 | 31 | 640 |
Mike Shergold | 11 | 20 | 417 |
Thomas Popham | 9 | 41 | 262 |
Edward Hoare | 8 | 24 | 202 |
Paul Darnell | 7 | 20 | 113 |
Roger Rivett | 7 | 16 | 221 |
R.A. Williams | 6 | 8 | 390 |
A. Mistry | 6 | 9 | 250 |
Marcus Turner | 5 | 16 | 59 |