Current Issue : July - September Volume : 2017 Issue Number : 3 Articles : 6 Articles
A hardware-in-the-loop (HiL) test is performed to verify the software functions mounted on automotive electronic control units\n(ECUs). However, the characteristics of HiL test limit the usage of common debugging techniques. Meanwhile, the logs of how\nthe program uses memory can be utilized as debugging information collected by the controller area network (CAN). However,\nwhen the 32KBmemory is observed with 10ms period, about 96% of the data on each cycle is lost, since the CAN only can transfer\n1.25KB of data at each cycle. Therefore, to overcome the above limitations, in this study, thememory is divided intomultiple regions\nto transmit generated data via CAN. Next, the simulation is repeated for the each divided regions to obtain the different areas in\neach simulation.The collected data can be visualized as update information in each cycle and the cumulative number of updates.\nThrough the proposed method, the ECU memory information during the HiL test was successfully collected using the CAN; the\ntransmission is completed without any loss of data. In addition, the data was visualized in images containing the update information\nof the memory. These images contribute to shortening the debugging time for developers and testers....
This paper presents a novel capacitive microelectromechanical systems (MEMS)\naccelerometer with slanted supporting beams and all-silicon sandwich structure. Its sensing\nmechanism is quite similar to an ordinary sandwich-type MEMS accelerometer, except that its\nproof mass is suspended by a beam parallel to the {111} plane of a (100) silicon wafer. In this way,\neach sensing element can detect accelerations in two orthogonal directions. Four of these sensing\nelements could work together and constitute a 3-axis micro-accelerometer by using a simple planar\nassembly process. This design avoids the traditional 3-axis accelerometerââ?¬â?¢ disadvantage of possible\nplacement inaccuracy when assembling on three different planes and largely reduces the package\nvolume. The slanted-beam accelerometerââ?¬â?¢s performance was modeled and analyzed by using both\nanalytical calculations and finite element method (FEM) simulations. A prototype of one sensing\nelement was fabricated and tested. Measured results show that this accelerometer has a good bias\nstability 76.8 ppm (1ÃÆ?, tested immediately after power on), two directional sensitivities (sensitivity\nangle Ã?± = 45.4ââ??¦) and low nonlinearity (<0.5%) over a sensing range up to Ã?±50 g, which demonstrates\na great opportunity for future high-precision three-axis inertial measurement....
Pedestrian dead reckoning (PDR) can be used for continuous position estimation when satellite or other radio signals are not\navailable, and the accuracy of the stride length measurement is important. Current stride length estimation algorithms, including\nlinear and nonlinear models, consider a few variable factors, and some rely on high precision and high cost equipment. This\npaper puts forward a stride length estimation algorithm based on a back propagation artificial neural network (BP-ANN), using\na consumer-grade inertial measurement unit (IMU); it then discusses various factors in the algorithm. The experimental results\nindicate that the error of the proposed algorithm in estimating the stride length is approximately 2%, which is smaller than that of\nthe frequency and nonlinear models. Compared with the latter two models, the proposed algorithm does not need to determine\nindividual parameters in advance if the trained neural net is effective. It can, thus, be concluded that this algorithm shows superior\nperformance in estimating pedestrian stride length....
Prestressed concrete sleepers (or railroad ties) are principally designed in order to carry\nwheel loads from the rails to the ground of railway tracks, as well as to secure rail gauge for safe train\ntravels. Their design takes into account static and dynamic loading conditions. In spite of prestressed\nconcrete crossties being most commonly used in railway tracks, there have always been many\ndemands from rail engineers to improve the serviceability and functionality of concrete crossties.\nFor example, signaling, fiber optic, equipment cables are often damaged either by ballast corners\nor by the tamping machine. There has been a need to re-design concrete crossties to incorporate\ncables internally so that they would not experience detrimental or harsh environments. Also, many\nconcrete crossties need a retrofit for an automatic train control device and similar signaling equipment.\nIn contrast, the effects of holes and web openings on the structural capacity of concrete crossties have\nnot been thoroughly investigated. This paper accordingly highlights the experimental investigations\ninto the effect of holes and web openings on the toughness and ductility of concrete crossties. The key\noutcome of this research is to enable a better decision making process for retrofitting prestressed\nconcrete crossties with holes and web openings in practice....
There has been much interest in replacing traditional information supports with more\ntechnological solutions in recent years. New technologies which allow paper-like perception\nwith minimal power needs have emerged as low-power wireless scenarios. A priority for these\nnew supports is to create the architecture for a scalable solution which maintains minimal power\nrequirements. The retail industry demands a new information infrastructure that improves customer\nand employee satisfaction. In this work, authors propose an information provision architecture based\non E-Paper and carry out an experiment where different smart labeling architectures based on Paper,\nE-Paper, LED liquid crystal display (LCD) and Dot-matrix LCD were tested in order to determine\nwhich is best suited for a real labeling environment. Enclosed in a research project called SMARKET,\nthe authors pilot-tested the work in a real supermarket, having the opportunity to survey employees\nand customers about satisfaction and frustration with the use of the architectures proposed in this\nresearch work....
Model transformation is one of the prominent features and the rising research\narea of Model Driven Engineering (MDE). MDE promotes models to primary\nartifacts that drive the whole development process. This paper presents the\nmodel transformation approach for textual model oriented programs Umple\n(UML Programming Language) to generate android applications (apps). The\nproposed approach improved the generation of android source code by using\nDrools transformation rules and introducing new concern in model driven\nmobile engineering. The major objective of proposed transformation approach\nintends to address consistency between source and target model and\nalso intends to handle productivity issues in model driven software development.\nThe main results of model transformation approach are Java class for\nmodel layer, XML file for view layer and android activity class for controller\nlayer. Results show that proposed approach achieves high consistency between\nsource and target model and also improves model transformation productivity....
Loading....