Object-Oriented Modeling Simulation and Control of Activated Sludge Process

Object-oriented modeling is spreading in current simulation of wastewater treatments plants through the use of the individual components of the process and its relations to define the underlying dynamic equations. In this paper, we describe the use of the free-software OpenModelica simulation environment for the object-oriented modeling of an activated sludge process under feedback control. The performance of the controlled system was analyzed both under normal conditions and in the presence of disturbances. The object-oriented described approach represents a valuable tool in teaching provides a practical insight in wastewater process control field.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Concepts for slicing object-oriented programs

This paper proposes several concepts that form the basis for slicing object-oriented programs. In the case of object-oriented languages, new relations occur between language constructs such as classes, methods, and messages. Thus new forms of dependencies have to be considered in addition to the traditional control and data dependencies that form the basis of most software maintenance tools that are currently available for maintaining procedure-oriented programs. We show how the proposed slicing concepts can be applied within the software maintenance process by giving an illustration through an example of Java program

Toward an Object-Oriented Process Control Software Design Environment

The design of a control software design environment, namely the Integrated Design Notation (IDN) is presented. IDN supports the design, development and implementation of decentralised distributed control systems. A cable extrusion process is targeted as a demonstrator application, where object-orientation technology is expected to facilitate the improvement of extruder control in a distributed environment. The IDN is based on the Unified Modelling Language (UML). A CASE toll supporting UML is integrated with the IDN. The translation to integrate a control software tool (Simulink) and options to generate automatic Java code are described

Estimation of Defect proneness Using Design complexity Measurements in Object- Oriented Software

Software engineering is continuously facing the challenges of growing complexity of software packages and increased level of data on defects and drawbacks from software production process. This makes a clarion call for inventions and methods which can enable a more reusable, reliable, easily maintainable and high quality software systems with deeper control on software generation process. Quality and productivity are indeed the two most important parameters for controlling any industrial process. Implementation of a successful control system requires some means of measurement. Software metrics play an important role in the management aspects of the software development process such as better planning, assessment of improvements, resource allocation and reduction of unpredictability. The process involving early detection of potential problems, productivity evaluation and evaluating external quality factors such as reusability, maintainability, defect proneness and complexity are of utmost importance. Here we discuss the application of CK metrics and estimation model to predict the external quality parameters for optimizing the design process and production process for desired levels of quality. Estimation of defect-proneness in object-oriented system at design level is developed using a novel methodology where models of relationship between CK metrics and defect-proneness index is achieved. A multifunctional estimation approach captures the correlation between CK metrics and defect proneness level of software modules.Comment: 5 pages, 1 figur

Structured Object-Oriented Co-Analysis/Co-Design of Hardware/Software for the FACTS Powers System

There are several approaches to the hardware/software design in embedded systems, ranging from the traditional sequential methods which focus on the determination of the hardware architecture prior to software design, to newer object-oriented approaches that attempt to apply software engineering methods to hardware design without a systematic process. This paper discusses a structured object-oriented methodology for the integrated co-analysis and co-design of hardware/software systems using an extended high order object-oriented modeling technique (HOOMT). This methodology offers a uniform method for hardware and software developers to jointly develop the specifications for and partitioning of the hardware and software components of a system, as well as developing the interfaces between components, and allows easy design migration of components between hardware and software. In this paper it is applied to the co-analysis/co-design of the hardware and software of a simulated advanced power grid control system

Incorporating Manual and Autonomous Code Generation

Code can be generated manually or using code-generated software tools, but how do you interpret the two? This article looks at a design methodology that combines object-oriented design with autonomic code generation for attitude control flight software. Recent improvements in space flight computers are allowing software engineers to spend more time engineering the applications software. The application developed was the attitude control flight software for an astronomical satellite called the Microwave Anisotropy Probe (MAP). The MAP flight system is being designed, developed, and integrated at NASA's Goddard Space Flight Center. The MAP controls engineers are using Integrated Systems Inc.'s MATRIXx for their controls analysis. In addition to providing a graphical analysis for an environment, MATRIXx includes an autonomic code generation facility called AutoCode. This article examines the forces that shaped the final design and describes three highlights of the design process: (1) Defining the manual to autonomic code interface; (2) Applying object-oriented design to the manual flight code; (3) Implementing the object-oriented design in C

Automated knowledge generation

The general objectives of the NASA/UCF Automated Knowledge Generation Project were the development of an intelligent software system that could access CAD design data bases, interpret them, and generate a diagnostic knowledge base in the form of a system model. The initial area of concentration is in the diagnosis of the process control system using the Knowledge-based Autonomous Test Engineer (KATE) diagnostic system. A secondary objective was the study of general problems of automated knowledge generation. A prototype was developed, based on object-oriented language (Flavors)

Object-Oriented Design of an Automated Calibration System for an Analog I/O Process Control Device

The goal of this project was to deliver the design of object-oriented software for the control of a custom calibration/test system. This calibration/test system is to be used for the production testing and calibration of an Analog Input device used in a process control system. Software features include a GUI (Graphical User Interface), Analog Input device troubleshooting tools, calibration/test system calibration and troubleshooting tools, and report printing capability. This project followed the methodology defined by the Unified Process Model and delivered design documentation through the Inception and Elaboration phases. This paper discusses the planning, documentation and testing differences between a large software project and a small software project