Discrete event control with CFC

[Abstrac] In this paper it is proposed a discrete event control system representation methodology to design, implement and operate sequential systems, as an alternative to the sequential function chart (SFC) description method. Such method uses the standard language ST (structured text) of the IEC 61131-3 associated to the standard language developed by the Foundation Fieldbus, by associating ST based descriptions language to some function blocks on the basis of a continuous function charts (CFC) or function block diagrams (FBD

Event Control through Motion Detection

Computer Vision is the study of machines that extract information from an image and perform some processing on the captured images to extract necessary data to solve some task. As a scientic discipline, the study of computer vision is concerned with the theories behind articial systems that extract information from images. The image data could in several dierent forms and formats, such as video sequences, views from multiple cameras, or multi-dimensional data acquired from a medical scanner. As a technological discipline, computer vision intends to apply its theories and models to the construction and design of computer vision systems The role of computer vison in robots is providing detailed information about the environment. A robust vision system should be able to detect and identify objects reliably and provide an accurate representation of the environment to higher level processes. The vision system should also be highly ecient, allowing a resource limited agent to respond quickly to a changing environment. Each frame acquired by a digital camera must be processed in a small, usually xed, amount of time. Algorithmic complexity is therefore constrained, introducing a tradeo between processing time and the quality of the information acquired. In most robotic applications, the vision system is the main perception device and autonomous robots must be capable of using it in order to self-localize and locate the objects that they have to manipulate. The objective of the project was to build a computer controlled bot which could collect and deposit balls rolling down a ramp with the help of overhead/onboard camera.The ojective was achieved with the use of Motion History Image(MHI) based image processing algortihms and microcontroller based controling of motors

An algebra of discrete event processes

This report deals with an algebraic framework for modeling and control of discrete event processes. The report consists of two parts. The first part is introductory, and consists of a tutorial survey of the theory of concurrency in the spirit of Hoare's CSP, and an examination of the suitability of such an algebraic framework for dealing with various aspects of discrete event control. To this end a new concurrency operator is introduced and it is shown how the resulting framework can be applied. It is further shown that a suitable theory that deals with the new concurrency operator must be developed. In the second part of the report the formal algebra of discrete event control is developed. At the present time the second part of the report is still an incomplete and occasionally tentative working paper

MORPH: A Reference Architecture for Configuration and Behaviour Self-Adaptation

An architectural approach to self-adaptive systems involves runtime change of system configuration (i.e., the system's components, their bindings and operational parameters) and behaviour update (i.e., component orchestration). Thus, dynamic reconfiguration and discrete event control theory are at the heart of architectural adaptation. Although controlling configuration and behaviour at runtime has been discussed and applied to architectural adaptation, architectures for self-adaptive systems often compound these two aspects reducing the potential for adaptability. In this paper we propose a reference architecture that allows for coordinated yet transparent and independent adaptation of system configuration and behaviour

Discrete event control for inspection and reverse engineering

Journal ArticleWe address the problem of intelligent sensing in this work. In particular, we use discrete event dynamic systems (DEDS) to guide the sensing of mechanical parts for industrial inspection and reverse engineering

Automated Event Control of Vehicles for Drivability Testing

Driving comfort is subjective; every driver has their set of preferences on how a car should behave. As the ability to control and suppress unwanted disturbances has increased with increased technological abilities, the demands on driving comfort in modern cars also rise. To account for these new demands, the testing and evaluation of the driving comfort becomes increasingly important for car manufacturers. This thesis focuses on how to implement different benchmark tests of an automatic gearbox into the Drivebox, a tool developed at IAV that can act as the accelerator pedal in a car, and the creation of an interface between the Drivebox and the test database Caltet. The final goal with the new implementation of the Drivebox is an easier and more repeatable execution of benchmark tests. In order to verify that the interface and the implemented tests work, the test were first simulated with the help of a computer and then performed in a vehicle. The results from both the simulation and the tests in the vehicle show that it is possible to control and execute the benchmark tests using this new interface with the Drivebox