Faculty of Mechanical Engineering

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Analysis of the Efficiency of Sound Barriers as a Method for Passive Control of Traffic Noise
(he European Society of Safety Engineers, European Association of Occupational Safety EUROSA, 2023-09)
Trajce Velkovski
;
Maja Anachkova
;
Simona Domazetovska
;
Jasmina Chaloska
;
Zlatko Petreski
In recent decades, the introduction of stricter environmental noise laws has resulted in a series of noise reduction measures of a different nature. These include urban planning measures such as the designation of noise-sensitive areas, regulations on vehicle speed limits or traffic restrictions, measures to improve the acoustic performance of vehicles, pavements and buildings, and the construction of noise barriers. The most used method to reduce noise on thoroughfares and highways is the installation of sound barriers that are constructed and constructed along the highway. There are three types of acoustic barriers, namely reflective, absorptive, and reactive. Absorbing barriers are opaque and contain a porous element that absorbs sound, such as fiber concrete and granulated concrete. Reflective barriers can be opaque or transparent and do not contain sound-absorbing material (concrete, cement, metal or wood) in their construction. Reactive barriers are opaque and are constructed to have cavities or resonators that are designed to absorb or reduce only certain frequencies that are part of the noise they are exposed to. Determining the effectiveness of noise barriers has attracted the attention of researchers over the past 40 years, and a wide variety of mathematical and experimental methodologies have been developed to assess it.
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Analytical modeling and FEM simulations of an energy harvesting cantilever beam
(2022)
Anastasija Ignjatovska
;
Damjan Pecioski
;
Dejan Shishkovski
;
Maja Anachkova
;
Simona Domazetovska
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Smart irrigation system using Internet of Things technology
(2021-12)
Maja Anachkova
;
Ana Kochovski
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Prototyping wearable devices for boosting entrepreneurial spirit
(South East European Research Centre), 2019-09)
Simona Domazetovska
;
Maja Anachkova
;
Jovana Jovanova
With the advances in technology and more applications becoming real-time and embedded, teaching the mechatronics course only theoretically becomes insufficient. Consequently, project-based learning becomes one of the most effective approaches in teaching mechatronics subjects. The main objective of this paper is to present an innovative approach in project-based learning within a mechatronics course for teaching undergraduate students. The project based learning is presented through student projects inspired by wearable electronics as new trending fields in mechatronics. In this paper, a novel methodology for implementing the project based learning process was described. The course structure, organization and evaluation are explained. The students’ feedback, results and the benefits from the course are also discussed. Conclusions about the project based learning and its effects in teaching mechatronics among undergraduate students are pointed out.
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Design, modeling and prototyping of bio-inspired robot actuated by piezoelectric transducers
(Proceedings of abstracts of XIV International Conference - ETAI 2018, 2018-09)
Maja Anachkova
;
Jovana Jovanova
;
Simona Domazetovska
This paper focuses on the design and development of a bio-inspired mobile robot using piezoelectric transducers as drives. The design of the device aimed to imitate the trajectory movement of a crawl-like animal. Design constraints as producing controlled movement with piezoelectric transducer, as well as the combination of multiple piezoelectric patches into one mobile robot are presented in their practical aspects. The robot uses 2 piezoelectric transducers as main drives, but also as main structural components of the device. The patches are connected with a thin light rod, and the kinematic of movement is achieved with 4 tiny wooden legs connected on each of the patches. The project investigates the possibility and effectiveness of the piezoelectric transducers for movement of the bio-inspired mobile robot. From conceptual development, to the mechanical and numerical design and control, the mobile robot is used to test different trajectories of movement. Ni RIO Evaluation kit has been incorporated as a real-time and FPGA control platform for the mobile robot while using LabView programing environment. To accomplish complex trajectories of movement the velocity of the robot was measured for straight line and rotation of the robot. Mathematical model is built and analyzed through SimMechanics module in Matlab.
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Modeling of multi locomotion of soft robot
(Proceedings of abstracts of XIV International Conference - ETAI 2018, 2018-09)
Simona Domazetovska
;
Vasko Changoski
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Maja Anachkova
;
Jovana Jovanova
Inspired by nature, engineers have explored the design of soft bio-inspired robots. Soft-bodied robots have potential to exploit morphological computation to adapt and interact. Modeling of the movement of a worm, a caterpillar and an octopus will be presented and analysed in this work. The models rely on segmented approach and variations of external loadings to achieve the desired kinematics of movement using Matlab/Simulink. The parametric results from the simulation lead to a conclusion of optimal number of segments and performance. The actuation of the robot is foreseen to be achieved by shape memory allows in linear and torsional configuration. Multi locomotion of these bio-inspired soft robots will be analysed.
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CAD modeling of parallel robot(tripod) in matlab/simulink
(2019)
Maja Anachkova
;
Hristijan Mickoski
The purpose of this paper is to create a model simulation of a parallel robot with PID controller using the programming package Matlab/ Simulink. In this paper, forward and inverse kinematics of parallel robot tripod is presented; model of the parallel robot in the programming package Solid Works is constructed; simulation model of the parallel robot tripod is made by conversion from Solid Works to Matlab/Simulink and results for velocities and accelerations in its kinematic joints are obtained that serve to the management and control of the mobile platform as a major problem in the construction of a parallel robot. Model simulation of parallel robot will be the basis for creating models of parallel robots with more complex structure, detailed understanding of their kinematics and control design as an inevitable part of the future of robotics and mechatronic.

Faculty of Mechanical Engineering

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