Auto Code Research Articles

DSP-FPGA based real time implementation of carrier based PWM technique for an indirect matrix converter

ABSTRACT The main focus of the presented work is to provide an easy, efficient and rapid method of implementing the carrier-based PWM (CPWM) technique for the three-to-three phase indirect matrix converter (IMC). The control platforms DSP (TMS320F28335) and the FPGA (Spartan-6) are used for realising the CPWM scheme for the IMC. In the presented work, the auto code generation facility provided by the simcoder module of the PSIM software is utilised to develop the C-code for the TI F28335 hardware target. The FPGA is used to perform the logical operations on the switching pulses produced by the DSP. The complete procedure of implementing the CPWM scheme in DSP using simcoder module of PSIM and FPGA is demonstrated in this work. The simulation and the experimental results are included to verify the effective implementation of the CPWM scheme for the IMC.

Handwritten Digit Recognition Scheme Based on Noise Reduction and Trestle Self-Coding

In this paper, in order to improve the accuracy of handwritten number recognition, a convolutional neural network based on noise reduction and stack auto coding is formed by combining the denoising auto coding algorithm with stack auto coding algorithm. In this paper, the MNIST dataset is preprocessed first, then the noise reduction and stack auto coding network layer are constructed, and finally the stack auto coding algorithm based on the improved denoising auto coding is used to train and test the dataset. Experimental data show that the proposed method achieves low loss value and effectively improves the recognition accuracy in the MNIST test set.

Mentally Ill Employees’ Quest for Justice in Litigation: Procedural and Distributive

This research explores the issue of how employees with mental illnesses receive justice in litigation. It is a 10% random sample of cases litigated in 2005, 2010, and 2015. NVivo was used to auto code the almost 850,000 words that comprise these cases, considering variables such as psychological illnesses and treatment, changes in legal bases, and case outcomes over the years. Statistically significant differences in case outcome for employees was found when recent cases were compared with the earlier ones. The research develops and tests the concept of three types of justice: procedural internal, procedural external, and distributive. Using Kruskal Wallace, statistically significant differences were found in the justice types. However, these were not significantly related to case outcomes. Suggestions for future research are also provided.

Sentiment Analysis from Facebook Comments using Automatic Coding in NVivo 11

The number and size of social networks have grown significantly as years have passed. With its 1.5 billion active users, Facebook is by far the most popular social networks on the planet. From kindergarten kids to grandparents to teenagers, Facebook attracts users of all ages, religions, personalities and social status. Facebook users are sharing their personal information, their lifestyle, their precious moments and their feelings online. In this paper, we download a set of comments from the page ‘Opposing Views’ from Facebook. These were then categorised into either a positive comment or a negative comment using the auto code feature in NVivo 11. Comments where no positive or negative sentiments are found are considered to be neutral. Out of 626 comments, 29.6% were found to contain positive sentiments while 62.0% were found to contain negative sentiments. The outcome of this work can be used by businesses to assess public reviews about their products. This will help them understand what is working and what is not. Thus, they can improve their products and respond to customer demands sufficiently quickly.

Model and Software in the Loop with Automatic Code Generation for Indicator Lights Warnings

In this paper Model Based Design (MBD) is used to simplify the development of three types of visual warning in an automobile. Along the signals the proposed system provides the outputs to send encapsulated signals in an automotive network. The method presented in this paper uses auto code generation to ease the developers work and give engineers experienced in embedded programing a very useful option to avoid expenditure of time often waste in manual programing. The C code generated automatically can be used in several hardware and the methodology presented is helpful in a wide broad of applications.

모델기반 개발기법과 X-plane을 이용한 무인항공기 비행제어 프로그램 모의비행 검증

This paper shows the design of operation flight program(OFP) using model-based design(MBD) method which is used in various engineering fields to reduce time and flight risks for development. The verification of OFP for DO-178C guidelines carry out by a model advisor function of simulink. The flight control logic on simulink is converted into C-language by auto code generation tool from, then it is implemented on 32bit digital signal processor(DSP). The verifications of flight control algorithm on various weather conditions are performed by th HILS system with Flight simulator program, X-plane.

Robustness of Simulink/Stateflow Model Against Implementation Imperfections

Model-based software development frameworks such as Simulink/Stateflow support auto code generation. Due to the limitations of the implementation platform on which the generated code is deployed on, imprecision is introduced to the implementation and may lead to unpredictable behaviors in the implementation. In this paper, an implementation model is defined to model the imprecisions introduced by the platform. We present a notion of Path-Robustness (P-Robustness) and Path/Output-Robustness (P/O-Robustness) between the software model and its implementation model to determine if the implementation preserves the control and data flow of the software. An approach is proposed to check the P-Robustness and P/O-Robustness properties of the software model by constructing an error propagation model from the implementation model. P/O-Robustness is proved stronger than approximate bisimulation introduced by Girard et al.

MotoTron-Based Rapid Prototyping Development Platform

The ECU development is an extremely complex process. It includes multiple steps and tasks: modular-oriented modeling, auto code generation, ECU flash, calibration and so on. The configuration and function of MotoTron-based rapid prototyping development platform are introduced. The control function finally meets the basic requirements of engine control.

스탭핑 모터에 의한 수동변속기 차량의 클러치 제어 개발에 관한 연구

본 논문은 스텝핑 모터를 이용하여 수동변속기 차량의 클러치를 자동으로 제어하기 위한 제어알고리즘 및 제어로직 구현 결과를 기술한 것이다. 기본제어 알고리즘은 차량의 통신데이터를 이용하여 운전자 의지를 파악하고 이에 따라 클러치 연결 혹은 해제 시점을 파악하여, 이에 따른 구동신호를 발생시키고 클러치의 위치 및 이동거리는 구동신호의 펄스 개수에 의하여 계산된다. 제어로직을 마이크로프로세서에 탑재하는 과정은 자동코드생성기법을 이용하였으며 이를 프로토 타입 제어기에 탑재하여 기본 성능시험을 실시하였다. This paper describes a control algorithm and test results of an automated manual transmission clutch actuated by a stepping motor. The control algorithm extracts driver's demand from CAN signals and decides the exact timing to engage or disengage the clutch based on the demand. A pulse signal is generated to drive the clutch and the travel of the clutch can be calculated by accumulating the pulse signal. An auto code generation method was introduced in implementing the control logic to the micro-processor of the prototype controller and a series of basic tests were carried out to validate its performance.

A New Design Method of Automotive Electronic Real-time Control System

Abstract Structure and functionality of automotive electronic control system is becoming more and more complex. The traditional manual programming development mode to realize automotive electronic control system can’t satisfy development needs. So, in order to meet diversity and speedability of development of real-time control system, combining model-based design approach and auto code generation technology, this paper proposed a new design method of automotive electronic control system based on Simulink/RTW. Fristly, design algorithms and build a control system model in Matlab/Simulink. Then generate embedded code automatically by RTW and achieve automotive real-time control system development in OSEK/VDX operating system environment. The new development mode can significantly shorten the development cycle of automotive electronic control system, improve program's portability, reusability and scalability and had certain practical value for the development of real-time control system.

모델기반 자동코드 생성과 실시간 운영체제 기반 무인기용 비행제어시스템 탑재 프로그램 개발

In this paper, an embedded program of a flight control system for a small high performance UAV is introduced. The program consists of modules for device management and guidance and control. The device management system handles navigation sensors and mission equipments. The program for the guidance and control system is used to accomplish various kinds of missions and realize automation of flight control. Driver programs embedded in the device management system for operation of sensors and external devices are based on Texas Instrument`s DSP/BIOS RTOS(realtime operating system). The on-board programs for the guidance and control system is obtained by using the model-based auto code generation technology.

Soft Starting of Three-Phase Induction Motor Using DSP Auto Coding and Power System Controllers (Digital Motor Controllers)

Since the rapid development of the digital controller, such as Micro-Controllers (MC) and Digital Signal Processor (DSP), to replace the traditional analogue controller, their applications in the power system control are growing in fast pace. Several algorithms have been developed to achieve the best utilization of the digital controller. This is considered a major barrier facing the power engineers. Auto coding is a term used to express the translation of the high level model, which power engineer are familiar with, to a low level assembly code targeting a specific controller. In this paper, the authors present their experience dealing with the auto coding tools from MatLab targeting Digital Signal Processor (C2000 Family). Moreover, this paper walks through the steps and the most famous mistakes for converting the power system MatLab model to an assembly code for the DSP-C2000. The paper is using an induction motor controller as an example along with the practical laboratory results.

Development of Case Database of Fixtures Based on SolidWorks

This work employs Visual Basic and Access to develop a case database management system for flexible fixtures using coding technology and parameter driving technology. The database management system of fixtures’ cases is built. The secondary development of SolidWorks is performed by VB 6.0, and the system is transplanted to SolidWorks. The system can realize the fixtures’ auto coding, storage, search, display and system management with simple operation and convenient maintenance. The system has a large flexibility as the case database can be expanded and the fixtures’ parameters can be modified according to actual situation of enterprise without limitations of the software.

Development of Auto Coding System on the Basis of MedDRA to Analyze Adverse Events for Clinical Trial

Development of Auto Coding System on the Basis of MedDRA to Analyze Adverse Events for Clinical Trial

The MCDC paradox

Modified Condition/Decision Coverage (MCDC) is a structural testing strategy required to verify Level A software used in commercial aviation. In DO-178B, Level A software is defined as software whose anomalous behavior would cause or contribute to a failure of system function resulting in a catastrophic failure condition for the aircraft. Paradoxically, this technique does not detect common errors, yet it consumes a large portion (approximately 25%) of the verification budget because of the number of test cases required to satisfy this coverage. Furthermore, this approach is directly applicable to only high-level languages, making its applicability of limited value to assembly language programs and machine-level code which could have been generated by auto code tools. A simpler approach is suggested in this paper that would better detect these common errors and would be more cost-effective for all applications.