L. Vlacic - Academia.edu (original) (raw)

Papers by L. Vlacic

IFAC proceedings volumes, 2013

IFAC Proceedings Volumes, 2006

This popular 3 day course is a must for people who want to polish up their regulatory control ski... more This popular 3 day course is a must for people who want to polish up their regulatory control skills and get some hands on experience with loop tuning. The agenda also covers design of Advanced Regulatory Control with an introduction to higher level technologies. Attendees from a range of disciplines (process engineers, instrument/electrical engineers, instrument/DCS technicians, industry consultants and process control engineers) have benefited from the blend of practical techniques explained through the use of real life examples and simulation exercises. DAY ONE Process Control context-objectives, benefits, threats, terminology and structure. Process Responses-types and measurement. Data analysis-sampling, noise and filtering. PID feedback control-PID components, equation types and tuning approaches. Tuning techniques-flow, pressure, temperature and level tuning approaches. Loop performance and instrument vulnerabilities. Exercises to focus on: Response definition and appropriate use of filtering Use of the free Tune Wizard tuning tool DAY TWO Dealing with Deadtime-tuning and model based control. Cascade control-initialisation and anti-windup issues. Process non-linearity and how to deal with this. Constraint control and ratio control. Dynamic compensation and feedforward control.

International Transactions in Operational Research, 1996

Electricity supply planners are now expected to consider a wide range of supply and demand option... more Electricity supply planners are now expected to consider a wide range of supply and demand options to meet future power needs. The evaluation is also expected to consider multiple objectives in such diverse areas as quality of supply, cost, environmental and social impacts. Further, there are a range of views on the appropriate weightings for those various considerations. Traditional methods

Control Engineering Practice, 1997

Annual Reviews in Control, 2006

Mankind civilization in the globalization age depends heavily on advanced information technologie... more Mankind civilization in the globalization age depends heavily on advanced information technologies resulting from automation of control and decision expertise and their respective scientific disciplines. These have a multitude of impacts on development of national economies within the global economy. The broad area of social systems, being essentially human centred systems, is a cross-, inter-and multidisciplinary challenge to control community. Social systems in modern civilization, currently undergoing globalization, are reviewed from the systems science viewpoint and on the grounds of recent developments in control science and technology. Recent developments put new emphasis on the social responsibility of the control and automation field during the ongoing changes from the cold-war bipolar world to a unipolar one on the way to mankind's multi-polar world of the future. The focus should be on innovative systems approaches, employing new paradigms, to combined knowledge and technology transfer worldwide , that may remedy some of the negative aspects of globalization.

IFAC Proceedings Volumes, 2010

This paper addresses the topic of real-time decision making for autonomous city vehicles, i.e. th... more This paper addresses the topic of real-time decision making for autonomous city vehicles, i.e. the autonomous vehicles' ability to make appropriate driving decisions in city road traffic situations. After decomposing the problem into two consecutive decision making stages, and giving a short overview about previous work, the paper explains how Multiple Criteria Decision Making (MCDM) can be used in the process of selecting the most appropriate driving maneuver.

Journal of Robotics and Mechatronics, 2010

The publication of this issue was driven by the vision that, in the not too distant future, Cyber... more The publication of this issue was driven by the vision that, in the not too distant future, Cybernetic Transport Systems (CTS) will be seen on city roads and dedicated infrastructures. TheWorld Council for Sustainability has projected that CTS will be seen in cities in as early as 2030 (Mobility 2030: Meeting the Challenges to Sustainability; World Business Council for Sustainable Mobility, July 2004). CTS are based on fully automated driverless urban road vehicles (CyberCars). They can also be based on Dual-Mode Vehicles (DMV) - conventional vehicles with Advanced Driver Assistance Technology (ADAT) and capable of driverless driving, on request by a driver. ADAT covers electronic and software products that assist drivers in driving. DMV assumes that a driver is not in control of the vehicle at all times but is fully responsible for vehicle operation throughout. Both CyberCars and DMVs co-operate through vehicle-to-vehicle and vehicle-to-infrastructure communication links thus enabl...

Distributed Autonomous Robotic Systems 3, 1998

This paper addresses the specific problem of intelligent agents crossing an unsignalised, two lan... more This paper addresses the specific problem of intelligent agents crossing an unsignalised, two lane, four-road intersection without collision. The developed event driven decision-making algorithm proved to be a workable solution in conjunction with the passive beacons used. While the developed solution is not directly scalable into a vehicle capable of transporting human passengers, it does show that technology and ability to create such agents is currently achievable. The solution enabled the agents to pass each other at a range which is just greater than their maximum detecting range. Future work involves the use of more than two autonomous agents and experiments with various configurations of road intersections.

Intelligent Autonomous …, 1998

Abstract. The merit of the performance of intelligent autonomous mobile robots, designed and deve... more Abstract. The merit of the performance of intelligent autonomous mobile robots, designed and developed by Griffith University's Intelligent Control Systems Laboratory (ICSL), when compared with other developed systems is in:(a) two-sensor based obstacle avoidance;(b ...

ijcas.com

Abstract: This paper gives a simulation study of a new fuzzy logic control (FLC) approach for the... more Abstract: This paper gives a simulation study of a new fuzzy logic control (FLC) approach for the mold level control in continuous casting processes. The proposed FLC is PID type hybridizing the conventional fuzzy PI control and Fuzzy PD control with a simplified design scheme. It is shown that, compared with the conventional control, this new control strategy can achieve superior performance for steady-state response and is more robust against process parameter variations and disturbances. Keywords: steel industry, fuzzy control, ...

This chapter provides an overview of intelligent control techniques, neural networks and fuzzy lo... more This chapter provides an overview of intelligent control techniques, neural networks and fuzzy logic, and explains how these techniques, especially fuzzy logic, can be used to solve distance recognition and tracking control in intelligent autonomous vehicles. For the covering abstract see ITRD E109878.

National IICA Conference 2005: From Sensors to …, 2005

Copyright in individual works within the repository belongs to their authors or publishers. You m... more Copyright in individual works within the repository belongs to their authors or publishers. You may make a print or digital copy of a work for your personal non-commercial use. All other rights are reserved, except for fair dealings or other user rights granted by the ...

Journal of Decision Systems, 1998

ABSTRACT

42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475), 2003

This paper deals with Web assisted control education. It gives taxonomy of the resources availabl... more This paper deals with Web assisted control education. It gives taxonomy of the resources available on the Internet and provides examples for each class. The paper then gives a more concrete example of online control education by describing a recently developed interactive simulation of autonomous vehicle manoeuvres and a range of other control problems designed to highlight particular aspects of control theory.

Proceedings of the 19th IFAC World Congress, 2014

1998 Second International Conference. Knowledge-Based Intelligent Electronic Systems. Proceedings KES'98 (Cat. No.98EX111), 1998

This paper presents a new neural netwodc (NN) based Adaptive Backthrough Control (ABC) & e m for ... more This paper presents a new neural netwodc (NN) based Adaptive Backthrough Control (ABC) & e m for both linear and nodinear dynamic plants. A feedforwanl approach presented here falls into the direct design category. In its simplest form the implementation requires an -on of the process parameters at any sample t . UnWre the other feedforward NN based control schemes the ABC hem comprises of one neural netwodr only which ~t a n m l y acis as bothplant model (emulator) and the contmller (iivers of the emulator). For linear plants, without noise, the resulting feedforwd controller, providing that the order of the plant and plant model are equal, is a perfect adaptive poleszeros canceller. In the case d nonlinear dynamic system, and for the monotonic nonlinearity, the Hoposed ABC control represents the nonlinear predictive controller. The ABC scheme is based on the discrete nonlinear (NARMAX) dynamic model. For such models and for monotonic nonlinearity, the calculation of the desired control si@ js the result of the nonlinear optimization procedure with guaranteed convex searcb function and consequently with an unique solution.

Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482), 2000

ABSTRACT Using technologies such as Web browser-based programming languages and multimedia tools,... more ABSTRACT Using technologies such as Web browser-based programming languages and multimedia tools, the authors are developing a sophisticated control environment for use as a World Wide Web front-end to intelligent control systems. Cooperative behaviour will be remotely facilitated through a two-way transferral of data-status information from the vehicles to the operator, and commands/parameters from the operator to the vehicles. This paper describes the background and context, the proposed solution at the concept level, and issues concerned with implementation.