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Analytical Model for Calibration Results performances enhancement, resulting in automated prescription for equipments

AIRBUS-Juan Manuel García Lasanta
Airbus-Damian MENDEZ-HUELVA
  • Technical Paper
  • 2019-01-1878
To be published on 2019-09-16 by SAE International in United States
The current aeronautical manufacturing sector is characterized by the high level of competence and the required requirement in its production processes, based on the objectives of profitability and safety (airworthiness). In recent years, there is a real revolution in the sector, where the most advanced tools for the organization and optimization of production are given priority, supported by the latest massively used techniques of automatic data collection. , their organized storage and their analytical classification. Metrology plays a key role in ensuring the quality and reliability of the information generated in these productive cycles. The provision of an analytical model of flexible measurement systems, capable and easily adaptable to the dynamics of the company, is presented as one of the pillars in which this new conception of production is based. The provision of an analytical model of flexible measurement systems, capable and easily adaptable to the dynamics of the company, is presented as one of the pillars in which this new conception of production is based. At the Airbus plant in Puerto Real, and in…
 

A New Positioning Device Designed for Aircraft Automated Alignment System

Shanghai Jiao Tong University-Jie Huang, Long Yu, Yuhan Wang
Shanghai Top NC Tech Co Ltd-Yilian Zhang
  • Technical Paper
  • 2019-01-1883
To be published on 2019-09-16 by SAE International in United States
Accurate and fast positioning of large aircraft component is of great importance for Automated Alignment System. The Ball joint is a widely-used mechanical device connecting the aircraft component and Automated Alignment System. However, there are some shortcomings for the device in man-machine engineering, such as the entry state of the ball-head still needs to be confirmed by the workers and then switched to the locking state manually. To solve above problems, a new positioning mechanism is present in this paper, which consists of a ball-head and a ball-socket. The new device is equipped with a monocular vision system, in which a calibrated industrial camera is used to collect the images of the ball-head. And then, the 3-D coordinate of the ball-head center is calculated by a designed algorithm, which combines the symmetry of the sphere and the principle of projection transformation, guiding the positioner to capture the ball-head. Once the ball-head gets into the ball-socket, the pneumatic system inside the ball-socket will drive the piston to move to the specified location. Meanwhile, the amount of…
 
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Design and Validation of Low-Cost Intensity Probe

Michigan Technological University-Karan Gundre, Andrew Barnard
Published 2019-06-05 by SAE International in United States
Sound intensity measurement techniques that used a two-microphone configuration, were first developed in the late 1970s. Originally, the focus was on improving precision during testing or post-processing. However, with the advent of modern, sophisticated equipment, the focus has shifted to the apparatus. Availability of phase-matched microphones has made post-test correction obsolete as the microphones eliminate a majority of the errors before the data is even collected. This accuracy, however, comes at a cost, as phase-matched microphones are highly priced. This paper discusses employing the method of improving post-processing precision, using inexpensive, current equipment. The phase error of the system is corrected using a simple calibration technique and a handheld phase calibrator that is similar to the one used for amplitude calibration of microphones. The intensity probe and calibrator is manufactured using rapid prototyping and the executable software that goes with the probe is designed in NI LabVIEW. The entire setup uses inexpensive parts to lower the cost and modern software to compensate for the errors due to these parts. The design of the probe and…
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CIRCUIT BREAKER - AIRCRAFT, TRIP-FREE, PUSH-PULL, 1/2 THRU 25 AMPS, TYPE 1 -55 THRU +121 °C

AE-8B Protective and Control Devices
  • Aerospace Standard
  • AS33201B
  • Current
Published 2019-04-25 by SAE International in United States
No Abstract Available.
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CIRCUIT BREAKER - TRIP-FREE, PUSH-PULL, 1/2 THRU 20 AMP, TYPE I

AE-8B Protective and Control Devices
  • Aerospace Standard
  • AS26574A
  • Current
Published 2019-04-10 by SAE International in United States
No Abstract Available.
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Implementation of a 0-D/1-D/3-D Process for the Heat Release Prediction of a Gasoline Engine in the Early Development Stage

Ricardo UK Ltd.-Kenan Mustafa, Nicholas Winder, Richard Osborne
University of Brighton-Robert Morgan, David Mason, Morgan Heikal
Published 2019-04-02 by SAE International in United States
The automotive market’s need for ever cleaner and more efficient powertrains, delivered to market in the shortest possible time, has prompted a revolution in digital engineering. Virtual hardware screening and engine calibration, before hardware is available is a highly time and cost-effective way of reducing development and validation testing and shortening the time to bring product to market. Model-based development workflows, to be predictive, need to offer realistic combustion rate responses to different engine characteristics such as port and fuel injector geometry. The current approach relies on a combination of empirical, phenomenological and experienced derived tools with poor accuracy outside the range of experimental data used to validate the tool chain, therefore making the exploration of unconventional solutions challenging. An alternative method that is less data and user experience dependent, is therefore needed to enable radical improvements in performance to be delivered without compromising the time to market.In this work, a pragmatic engine development process using a combination of a 0-D combustion Stochastic Reactor Model (SRM) provided by LOGESoft and non-combusting ‘cold’ CFD is used.…
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Investigation in Calibration Procedures for Portable and Stationary Solid Particle Number Measurement Systems

Horiba Europe GmbH-Yoshinori Otsuki, Hiroshi Nakamura
Horiba Ltd.-Kentaro Kojima, Kenji Kondo, Kazuhiko Haruta
Published 2019-04-02 by SAE International in United States
The Particle Measurement Programme (PMP) established under the United Nations Economic Commission for Europe has developed the solid particle number (PN) measurement methodology, which has relatively higher sensitivity than the particulate matter measurement protocol. The first PN emission regulation was introduced in 2011. The stationary PN measurement system (PMP system) has been applied in the chassis and the engine test cells. In recent years, real driving emissions (RDE) measurement is attracting attention. Portable emissions measurement systems for PN measurement (PN-PEMS) which can be installed on vehicles during RDE testing are available now. The European RDE regulation requires validation of PN-PEMS by comparing emission measurement results with a stationary PMP system on a chassis dynamometer prior to the on-road emissions testing. Measurement differences between the PN-PEMS and the PMP system has to be within the tolerance defined by the regulation. Therefore, equivalency in measurement results of the PN-PEMS to the PMP system is required. However, a PN-PEMS does not generally have the same system configuration as a PMP system. In addition, a PN-PEMS has different calibration…
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Calibration and Stitching Methods of Around View Monitor System of Articulated Multi-Carriage Road Vehicle for Intelligent Transportation

Hunan University-Xiexing Feng, Wei LI, Tianyuan Wei, Yinglin Zhang, Libo Cao
Published 2019-04-02 by SAE International in United States
The around view monitor (AVM) system for the long-body road vehicle with multiple articulated carriages usually suffers from the incomplete distortion rectification of fisheye cameras and the irregular image stitching area caused by the change of relative position of the cameras on different carriages while the vehicle is in motion. In response to these problems, a set of calibration and stitching methods of AVM are proposed. First, a radial-distortion-based rectification method is adopted and improved. This method establishes two lost functions and solves the model parameters with the two-step optimization method. Then, AVM system calibration is conducted, and the perspective transformation matrix is calculated. After that, a static basic look-up table is generated based on the distortion rectification model and perspective transformation matrix. Furthermore, to solve the problem of the variable relative position of cameras, the relative angles of the carriages are collected by the angle sensors and then transmitted to the central processor via the CAN bus. And then a dynamic offset look-up table is generated in real time. With the two look-up tables,…
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Vibration Rating Prediction Using Machine Learning in a Dynamic Skip Fire Engine

Tula Technology Inc-Aditya Mandal, Anastasios Arvanitis, S Kevin Chen, Li-Chun Chien, Vijay Srinivasan, Matthew Younkins
Published 2019-04-02 by SAE International in United States
Engines equipped with Dynamic Skip Fire (DSF) technology generate low frequency and high amplitude excitations that could reduce vehicles drive quality if not properly calibrated. The excitation frequency of each firing pattern depends on its length and on the rotational speed of the engine. Excitation amplitude mainly depends on the requested engine torque by the driver. During the calibration process, the torque characteristics that results in production level of noise, vibration, and harshness (NVH), must be identified, for each firing pattern and engine speed. This process is quite time consuming but necessary.To improve our process, a novel machine learning technique is utilized to accelerate the calibration effort. The idea is to automate the vibration rating procedure such that given the relevant power-train parameters, a vibration rating associated with that driving condition can be predicted. This process is divided into two (2) prediction models. The first model is a multiple additive regression trees that predicts the seat accelerometer data based on the various engine and vehicle parameters. The predicted seat accelerometer data is used as an…
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Real Time Energy Management of Electrically Turbocharged Engines Based on Model Learning

Loughborough University-Dezong Zhao, Wen Gu, Byron Mason
Published 2019-04-02 by SAE International in United States
Engine downsizing is a promising trend to decarbonise vehicles but it also poses a challenge on vehicle driveability. Electric turbochargers can solve the dilemma between engine downsizing and vehicle driveability. Using the electric turbocharger, the transient response at low engine speeds can be recovered by air boosting assistance. Meanwhile, the introduction of electric machine makes the engine control more complicated. One emerging issue is to harness the augmented engine air system in a systematical way. Therefore, the boosting requirement can be achieved fast without violating exhaust emission standards. Another raised issue is to design an real time energy management strategy. This is of critical to minimise the required battery capacity. Moreover, using the on-board battery in a high efficient way is essential to avoid over-frequent switching of the electric machine. This requests the electric machine to work as a generator to recharge the battery. The capability of generating power strongly depends on the engine operating point. One big challenge is that the calibration of generating power capability is time-consuming in experiments. This paper proposes a…
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