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Once the product yield is stable, usually 80%, the test engineer is responsible for advancing the product from engineering stages to initial production stages. During this period, the test engineer will monitor the production yield for a period of time, change the test program limits and even work with foundry engineer to further improve the yield.
Automotive engineering, along with aerospace engineering and naval architecture, is a branch of vehicle engineering, incorporating elements of mechanical, electrical, electronic, software, and safety engineering as applied to the design, manufacture and operation of motorcycles, automobiles, and trucks and their respective engineering ...
Automatic test equipment diagnostics is the part of an ATE test that determines the faulty components. ATE tests perform two basic functions. The first is to test whether or not the Device Under Test is working correctly. The second is when the DUT is not working correctly, to diagnose the reason.
Ideally, an embedded system would be tested against the real plant, but most of the time the real plant itself imposes limitations in terms of the scope of the testing. For example, testing an engine control unit as a real plant can create the following dangerous conditions for the test engineer:
The most common method for delivering test data from chip inputs to internal circuits under test (CUTs, for short), and observing their outputs, is called scan-design. In scan-design, registers ( flip-flops or latches) in the design are connected in one or more scan chains , which are used to gain access to internal nodes of the chip.
ecu.test automates the control of the whole test environment and supports a broad range of test tools. Various abstraction layers for measured quantities allow its application on different testing levels, e.g. within the context of model in the loop, software in the loop and hardware in the loop as well as in real systems (vehicle and driver in the loop).
A crash test of the Honda Ridgeline by the NHTSA Frontal small-overlap crash test of a 2012 Honda Odyssey 2018 Dodge Grand Caravan being struck by a mobile deformable barrier at 62 km/h 2016 Honda Fit striking a wall head-on at 56 km/h Driver-side oblique crash test of a 2017 Honda Ridgeline Jeep Liberty undergoing routine impact testing at Chrysler's Proving Grounds NHTSA research crash test ...
NVH is mostly engineering, but often objective measurements fail to predict or correlate well with the subjective impression on human observers. For example, although the ear's response at moderate noise levels is approximated by A-weighting , two different noises with the same A-weighted level are not necessarily equally disturbing.