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Predictive gearbox oil temperature using Machine Learning techniques

Electronics Engineering-Varaprasad Gandi
Tata Elxsi, Ltd.-Mithun Manalikandy, Rajesh Koduri
  • Technical Paper
  • 2020-01-0731
To be published on 2020-04-14 by SAE International in United States
Gearbox failure is the most common failure, which is being detected in vehicles, turbines and other applications. It is not possible to detect every fault manually because gearbox failure depends on various factors like gearbox oil temperature, uncertain driving patterns, engine components and other various gearbox parameters. In recent decades, a lot of research has been done in detecting gearbox failure and various methods and techniques have been proposed to predict failure and also to reduce maintenance and failure costs. To predict the behaviour of the gearbox, robust and efficient algorithms are required. In this work, an effective and accurate algorithm to predict gearbox failure after analysing various symptoms arising on gearbox oil temperature is proposed. Gearbox oil temperature variations are caused by different factors like viscosity, water saturation, dielectric constant and conductivity. Diverse machine learning models such as Support Vector Machine, Random forest and Logistic Regression algorithms from the dataset obtained from gearbox real-time observations are leveraged in this analysis. This paper aims to use sensor data for monitoring oil temperature for fault detection.…
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Multiple Engine Faults Detection based on Variational Mode Decomposition and Echo State Network

Tianjin University-Xin Li, Fengrong Bi, Xiaoqiang Ma, Pengfei Shen, Jiangang Cheng
  • Technical Paper
  • 2020-01-0418
To be published on 2020-04-14 by SAE International in United States
As a major power source, diesel engines are widely used in a variety of fields. However, because of complex structure, some faults which cannot be detected by direct signals would occur on engines and even lead to accidents. Among all kinds of indirect signals, vibration signal is the most common choice for faults detection without disassemble because of its convenience and stability. This paper proposed a novel approach for detecting multiple engine faults based on engine block vibration signals using variational mode decomposition (VMD) and echo state network (ESN). Since the quadratic penalty has a great influence on adaptable VMD that might make expected component signals cannot be extracted exactly, this paper proposed a dynamic quadratic penalty value, which will change with decomposing levels. This paper selected a best dynamic quadratic penalty value by analyzing a large amount of data and results showed that this approach can obtain more exact decomposing results. Based on decomposing results, 8 characteristic parameters were extracted to describe faults features comprehensively, while high-dimensional data raised computational difficulty for classifier. To…
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Research on Method of Sensor Fault Detection for OBD-II Compliant Motorcycles Based on Temperature Estimation

Keihin Corporation-Atsushi Watanabe
  • Technical Paper
  • 2019-32-0568
Published 2020-01-24 by Society of Automotive Engineers of Japan in Japan
On-Board Diagnostics II (OBD II), which will be to be introduced into motorcycles in Europe and India, requires that the engine oil and cooling water temperatures be monitored in a rational manner. The rationality of the sensors for engine oil and coolant temperatures (TW sensors) is derived from the ability to detect failure modes such as offset or fixation of unintended output voltage in addition to circuit continuity checks such as sensor harness disconnection and short circuit.The OBD II technology for 4-wheeled vehicles cannot be easily converted to motorcycles with their multiple cooling systems (air-cooled and water-cooled) and multiple heat dissipation structures (full fairings, naked structures, etc.). In previous studies, failures of the TW sensor were detected by estimating the water temperature with high accuracy based on the calorific value of the engine and the amount of heat dissipated. However, in studies considering the implementation of electronic control units (ECUs), it has been reported that such estimations are vulnerable to disturbance (especially from a heater or blower) because it was difficult to estimate water temperature…
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Design and Research of Intelligent Vehicle EPB Controller Based on ISO26262 Standard

Nanjing Tech University-Min Song
Senior-Tian Le Jia
Published 2019-11-04 by SAE International in United States
In recent years, the development of intelligent vehicle and new energy vehicles has advanced by leaps and bounds, which has further improved the safety requirements of controllers. And more and more component manufacturers are actively promoting the ISO 26262 standard “Road Vehicles-Functional Safety”. At the same time, the electronic parking brake (EPB) system is an indispensable electronic product of the intelligent vehicle, which brings convenience to drivers and improves vehicle safety. So it is necessary to develop an intelligent vehicle pneumatic EPB system based on the ISO 26262 standard to improve reliability and safety. In this paper, the concept phase of the ISO 26262 standard was analyzed and applied to the design of the EPB system. The risk assessment and risk analysis of the EPB system were carried out, and the corresponding safety objectives were formulated. In this paper, a dual MCU scheme was proposed to the EPB system, which contained the core MCU and the monitoring MCU. Then the hardware circuit is designed according to the proposed safety goal, including mutual reset circuit and…
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2019 'Create the Future' Electronics/Sensors/IOT Category Winner: Early Detection of Battery Faults

  • Magazine Article
  • TBMG-35447
Published 2019-11-01 by Tech Briefs Media Group in United States
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Fault Detection in Single Stage Helical Planetary Gearbox Using Artificial Neural Networks (ANN) and Decision Tree with Histogram Features

BSACIST-Syed Shaul Hameed, Muralidharan Vaithiyanathan, Mahendran Kesavan
Published 2019-10-11 by SAE International in United States
Drive train failures are most common in wind turbines. Lots of effort has been made to improve the reliability of the gearbox but the truth is that these efforts do not provide a lifetime solution. Majority of failures are caused by bearing and gearbox. It also states that wind turbine gearbox failure causes the highest downtime as the repair has to be done at Original Equipment Manufacturer [OEM]. This work aims to predict the failures in planetary gearbox using fault diagnosis technique and machine learning algorithms. In the proposed method the failing parts of the planetary gearbox are monitored with the help of accelerometer sensor mounted on the planetary gearbox casing which will record the vibrations. A prototype has been fabricated as a miniature of single stage planetary gearbox. The vibrations of the healthy gearbox, sun defect, planet defect and ring defect under loaded conditions are obtained. The signals show the performance characteristics of the gearbox condition. These characteristics and their number of occurrences were plotted in a histogram graph. Predominant statistical features which represent…
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Software Applications for the Control and Management of the Amine Swingbed Experiment

  • Magazine Article
  • TBMG-35265
Published 2019-10-01 by Tech Briefs Media Group in United States

The Swingbed software applications provide for the control, command, fault detection, fault recovery, and telemetry monitoring aspects of the Amine Swingbed experiment. These software components are the Swingbed Loader Computer Software Configuration Item (CSCI), the Swingbed Control Module, and the Swingbed Ground Controller applications. As a whole, the Amine Swingbed experiment provides a means for investigating the removal of carbon dioxide from the International Space Station (ISS) crews’ breathing environment via a system of a vacuum-regenerated amine pressure swing absorption reaction beds. Its development and deployment aboard the ISS as an Express Rack pay-load serves to advance the use of the amine-based pressure swing absorption technology towards a level of technology readiness suitable for use in future space transportation systems, where the use of consumables for the removal of carbon dioxide from the breathable environment is not desirable.

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The Right Stuff for Aging Electronics/Intermittence/No Fault Found

Universal Synaptics-Hector I. Knudsen
Published 2019-09-16 by SAE International in United States
For those in the avionics repair and maintenance business, the acronyms NFF (No Fault Found), NTF (No Trouble Found), and CND (Cannot Duplicate) are, unfortunately, all too familiar terms. After several decades of frustration with this illusive phenomenon, it continues to consume an enormous amount of test and diagnostic effort and is the source of considerable cost and discomfort within the multi-level avionics repair model.There are undoubtedly many causes of NFF and all of them should be addressed. The question is: Where do you start and which solution will be the most beneficial?Our particular efforts have focused on the literal or statistical analysis of NFF, recognizing that if the system’s MTBF (Mean Time Between Failure) has decreased, or if the device's NFF rate has increased with age and deterioration, a physical fault is most likely present. However, if it isn’t found during conventional testing then it probably only fails intermittently. Similarly, having an intermittent failure mode, it in all probability cannot be detected or diagnosed at testing time because of known and demonstrated limitations in…
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Safety Analysis: The Key to a Single-Pass ISO26262 Random Fault Workflow

  • Magazine Article
  • TBMG-34629
Published 2019-06-01 by Tech Briefs Media Group in United States

Advanced driver-assistance systems and autonomous drive technologies increase the complexity of automotive integrated circuits (ICs), making it harder to ensure that ICs are protected from random hardware faults. Safety mechanisms must be inserted to identify and control these unpredictable functional failures, and ISO26262 requires that the effectiveness of every safety mechanism is proven.

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Keyword Protocol 1281

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2818_201905
  • Current
Published 2019-05-20 by SAE International in United States
This Technical Information Report defines the diagnostic communication protocol Keyword Protocol 1281 (KWP1281). This document should be used in conjunction with SAE J2534-2 in order to fully implement the communication protocol in an SAE J2534 interface. Some Volkswagen of America and Audi of America vehicles are equipped with ECUs, in which a KWP1281 proprietary diagnostic communication protocol is implemented. The purpose of this document is to specify the KWP1281 protocol in enough detail to support the requirements necessary to implement the communication protocol in an SAE J2534 interface device.
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