2021
http://repository.utm.md/handle/5014/18417
6-8 Oct. 20212024-03-29T00:23:17ZSynthesis of the Control Algorithm to the Models of Objects with Inertia First Order and Second Order Astatism
http://repository.utm.md/handle/5014/18438
Synthesis of the Control Algorithm to the Models of Objects with Inertia First Order and Second Order Astatism
IZVOREANU, Bartolomeu; COJUHARI, Irina; FIODOROV, Ion; SECRIERU, Adrian; MORARU, Dumitru; POTLOG, Mihail
In this paper it is proposed to synthesize the control algorithm for the models of objects with inertia and second order astatism, which are described the dynamics of various technical objects and technological processes. These models of control objects have the double pole in the origin of axes and one negative pole. In order to tune the PID control algorithm to the given model of object, it was designed the control algorithm based on the maximum stability degree method with iterations. To verify the obtained results of tuning the PID controller, it was done the synthesis of the control algorithm by the polynomial equations method. An example of a system with the respectively model of control object and the controller synthesized according to these methods was computer simulated in the MATLAB software package and it was done the analysis of the system performance. There are highlighted the advantages of the maximum stability degree method with iterations by the simplification of the tuning procedure of the PID controller to this model of object.
Access full text - https://doi.org/10.1109/SIELMEN53755.2021.9600301
2021-01-01T00:00:00ZSynthesis of the PID Control Algorithm for the Models of Objects with Second Order Astatism
http://repository.utm.md/handle/5014/18437
Synthesis of the PID Control Algorithm for the Models of Objects with Second Order Astatism
IZVOREANU, Bartolomeu; COJUHARI, Irina; FIODOROV, Ion; SECRIERU, Adrian; MORARU, Dumitru; POTLOG, Mihail
In the paper is highlighted the industrial objects as cars, spacecraft, telescopes, plotters, lasers, elevators, etc., which are described by the mathematical model with double astatism. These models of control objects have a double pole in the origin of the coordinate axes. In order to tune the PID controller to the model of object with double astatism, it was elaborated the tuning algorithm based on the maximum stability degree method with iterations. It was done the computer simulation of the automatic control system with the respectively model of object and PID controller and it was done the analysis of the obtained performance. The advantages of the maximum stability degree method with iterations were highlighted by the reducing calculations and time, which lead to the procedure simplification of the PID controller tuning.
Access full text - https://doi.org/10.1109/SIELMEN53755.2021.9600436
2021-01-01T00:00:00ZOn-line Evaluation in Graphic Engineering Disciplines
http://repository.utm.md/handle/5014/18436
On-line Evaluation in Graphic Engineering Disciplines
DINTU, Sergiu; SULETEA, Angela
The transition to on-line learning required rigors not only in the use of new technologies, but also in the organization of courses in schools and universities. It was necessary to revise the content of the course, as well as the methods of teaching and assessment. The evaluation of students in the graphic disciplines is of increased complexity. The article proposes a solution for testing students based on the cognitive levels of Bloom's Taxonomy and using the tools provided by the MOODLE platform.
Access full text - https://doi.org/10.1109/SIELMEN53755.2021.9600305
2021-01-01T00:00:00ZAerodynamic Efficiency Numerical Estimation of 1 kW horizontal axis wind turbine rotor
http://repository.utm.md/handle/5014/18434
Aerodynamic Efficiency Numerical Estimation of 1 kW horizontal axis wind turbine rotor
GUTU, Marin; ODAINAI, Valeriu; MALCOCI, Iulian; TRIFAN, Nicolae
The paper presents an estimated analysis of the aerodynamic performance of a wind rotor with a horizontal axis. It is a design stage of a low power wind turbine, ≈ 1 kW. Several airfoils are considered to indicate high performance at low Reynolds numbers (approx. 100,000). For the analysis of the performance of the wind turbine with horizontal axis, the geometric parameters for a rotor with a power of 1 kW were considered. The required geometric parameters were estimated using a calculation model developed in the MathCad application. The wind rotor was developed and simulated in the QBlade application then, for comparison, it was numerically analyzed in ANSYS Fluent. The parameter of interest is the power coefficient without considering the mechanical/electrical losses and was compared with performance of some existing rotors.
Access full text - https://doi.org/10.1109/SIELMEN53755.2021.9600363
2021-01-01T00:00:00Z