Search

Your search keyword '"Donca, Radu"' showing total 12 results
Start Over Author "Donca, Radu"
12 results on '"Donca, Radu"'

1. Unveiling the Potential of Modular Mobile Robotic Systems. A Review

Author

Baneasa, Andrei, Buleandra, Debora, Tatar, Olimpiu, Donca, Radu, Ceccarelli, Marco, Series Editor, Corves, Burkhard, Advisory Editor, Glazunov, Victor, Advisory Editor, Hernández, Alfonso, Advisory Editor, Huang, Tian, Advisory Editor, Jauregui Correa, Juan Carlos, Advisory Editor, Takeda, Yukio, Advisory Editor, Agrawal, Sunil K., Advisory Editor, Lovasz, Erwin-Christian, editor, and Ciupe, Valentin, editor

Published
2024
Full Text
View/download PDF

4. A Detached House Simulation Using the International Building Physics Toolbox in Matlab\Simulink

Author

Vlad Muresan, Laura Pacurar, Balan Radu, and Donca Radu

Subjects
Engineering, business.industry, Mechanical engineering, Context (language use), General Medicine, Energy consumption, Toolbox, Automotive engineering, law.invention, Heating system, law, Underfloor heating, business, Radiator, MATLAB, computer, Efficient energy use, computer.programming_language
Abstract

Energy savings are an important issue in the context of climate change. The main goal of researchers is to study and develop new methods of improving energy efficiency in household heating. In this paper a Matlab toolbox is presented and explained. The toolbox is developed for researchers and students interested in simulating building energy behavior. A test room is developed and simulated and a radiator model is implemented. Two types of heating are used during the simulation: a radiant floor heating and a panel radiator. A simple on-off control is used for each heating system. The goal of the paper is to study the impact on energy consumption of each heating system used and their impact on energy consumption when the two heating systems are used in different configurations.

Published
2012

5. Mechatronic Design of a Planar Parallel Robot Actuated by Pneumatic Artificial Muscles

Author

Vistrian Maties, Donca Radu, and Sorin Besoiu

Subjects
Materials science, business.industry, Parallel manipulator, Mechanical engineering, Robotics, Workspace, Mechatronics, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Pneumatic artificial muscles, Control system, General Materials Science, Artificial muscle, Artificial intelligence, Actuator, business
Abstract

The pneumatic actuation is widely used in robotics. The actuators based on pneumatic artificial muscles are unconventional actuation systems which use the shortening by increase of the volume property which generate an axial force. They have a very good force/volume ratio and some advantages compared with conventional pneumatic actuation. This paper presents the mechatronic design of a PRRRP Biglide planar parallel robot actuated by four artificial muscles in antagonist configuration. The control system is based on an 8-bit microcontroller based development board and the position and force control is made by means of pressure regulation using proportional pressure regulators. It was determined the workspace of PRRRP Biglide parallel robot for different strokes of actuators using discretisation method in Matlab environment.

Published
2010

8. COMMAND AND CONTROL OF SHAPE MEMORY ALLOYS USED IN RETROFITTED BUILDINGS.

Author

Donca, Radu Calin and Draghici, Mihai Petru

Subjects
*SHAPE memory alloys, *CIVIL engineering, *RETROFITTING, *PID controllers, *ENGINEERING design
Abstract

This paper presents the usage of shape memory alloys (SMA) in civil engineering. It presents 2 examples of buildings that were retrofitted using SMAs. Some examples of SMA usages are presented. The SMA operating principle is presented and a mathematical model is proposed. Control methods are discussed with emphasis on the sensorless ones. A control board is proposed. The resistance versus current characteristic is measured for a typical NiTi wire. [ABSTRACT FROM AUTHOR]

Published
2011

9. Control Method for the Improvement of the Efficiency of a Fuel Cell.

Author

Donca, Radu, Balan, Radu, Maties, Vistrian, and Hancu, Olimpiu

Subjects
FUEL cells, ELECTRIC batteries, ELECTRODES, METAL catalysts, TEMPERATURE, SWITCHING power supplies
Abstract

The major breakthroughs that have recently brought fuel cells to the fore-front include the development of low resistance membranes, highly diffusive electrodes, and reduced use of noble metal catalysts. However, in order to obtain the maximum efficiency out of a fuel cell, some parameters like flow control, temperature, water flow and load must be controlled. This paper is focused on the load control. A three-stage SMPS converter is proposed and analyzed. The fuel cell operation and the types of fuel cells are also described. An experimental setup was made using a toy vehicle powered by a fuel cell in order to experimentally prove the theoretical approaches of load control. [ABSTRACT FROM AUTHOR]

Published
2006

10. The Integrated Design and Optimization of a Kinematic Axis in Mechatronics.

Author

Besoiu, Sorin, Maties, Vistrian, Rusu, Calin, and Donca, Radu

Subjects
MECHATRONICS, KINEMATICS, ENGINEERING, MECHANICS (Physics), INFORMATION technology, MICROELECTRONICS
Abstract

Mechatronics consists in integration of three fields in engineering: mechanics, electronics and information technology. The paradigm of mechatronics is integration. The paper presents details regarding the integration-process and the integrated design of positioning systems in mechatronics. The example of the positioning system based on dc motor and screw-nut transmission is analysed. [ABSTRACT FROM AUTHOR]

Published
2006

11. A Predictive Control Algorithm - Some Applications for Nonlinear Processes.

Author

Balan, Radu, Maties, Vistrian, Hancu, Olimpiu, Sergiu-Dan Stan, and Donca, Radu

Subjects
ALGORITHMS, PREDICTIVE control systems, NONLINEAR statistical models, COMPUTER simulation, AUTOMATIC control systems, MATHEMATICAL models
Abstract

This paper presents some applications of a Model Based Predictive Control (MBPC) type algorithm which is applied to nonlinear processes. The basic idea of the algorithm is the on-line simulation of the future behaviour of the control system, by using a few candidate control sequences. Then, using rule based control these simulations are used to obtain the 'optimal' control signal. The efficiency and applicability of the proposed algorithm are demonstrated through applications. [ABSTRACT FROM AUTHOR]

Published
2006

12. Mechatronic Design of a Planar Parallel Robot Actuated by Pneumatic Artificial Muscles

Author

Besoiu, Sorin, Măties, Vistrian, and Donca, Radu

Abstract

The pneumatic actuation is widely used in robotics. The actuators based on pneumatic artificial muscles are unconventional actuation systems which use the shortening by increase of the volume property which generate an axial force. They have a very good force/volume ratio and some advantages compared with conventional pneumatic actuation. This paper presents the mechatronic design of a PRRRP Biglide planar parallel robot actuated by four artificial muscles in antagonist configuration. The control system is based on an 8-bit microcontroller based development board and the position and force control is made by means of pressure regulation using proportional pressure regulators. It was determined the workspace of PRRRP Biglide parallel robot for different strokes of actuators using discretisation method in Matlab environment.

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results