Browsing by Author "Moezzi, Reza"

Now showing 1 - 7 of 7
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    Autonomous Vehicle Control based on HoloLens Technology and Raspberry Pi Platform: an Educational Perspective
    (ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2019-01-01) Moezzi, Reza; Krčmařík, David; Bahri, Haythem; Hlava, Jaroslav
    Localization and mapping is an essential part of an autonomous vehicle control. Microsoft HoloLens is a sophisticated augmented reality device using many advanced technologies. As such HoloLens has high appeal for young people and its use in teaching may increase the attractiveness of control classes. In this paper we describe how this device can be used in advanced control education for experiments with autonomous vehicles localization, mapping and control. Among other capabilities HoloLens can provide 3D position information by its spatial mapping feature. This facilitates the simultaneous localization and mapping (SLAM) problem. Furthermore, based on HoloLens position information the students can design vehicle longitudinal and lateral control systems and compare the performance achieved with different strategies such as PID and Model Predictive control. Example comparisons are given in this paper.
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    Efficient Use of Mixed Reality for BIM system using Microsoft HoloLens
    (ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2019-01-01) Bahri, Haythem; Krčmařík, David; Moezzi, Reza; Kočí, Jan
    Recently, a new independent concept used to classify the spectrum of reality technologies, as referenced in the reality virtuality continuum is MR of Mixed Reality. As an independent concept, MR mixes the best of both Virtual Reality (VR) and Augmented Reality (AR) int the same environment for the user's gaze. It covers essentially of all possible variations and compositions of real and virtual objects. Which is the result of blending the digital world and the physical world together, brings new advancements and challenges to human, computer and environment interactions. Thus, they offer potential for acquiring at least coarse point clouds and meshes of single rooms or even complete building structures that can be used in the context of building information modelling (BIM) in the future instead of manually modelling existing buildings based on 2D floor plans or manual measurements with laser scanners or computationally expensive image based 3D reconstruction techniques. In this paper, we proposed an efficient usage of MR techniques to manage the items of furniture of rooms using Microsoft HoloLens to create a BIM system. Therefore, we succeeded to map the occupied and unoccupied spaces of the rooms using the method of spatial mapping in 3D. In this case, we can add the items of furniture for each room in the order we choose in respecting its original organization. One hand, our BIM system allows moving the furniture from one side to the other side in real time. In the other hand, we applied the flexibility to rotate and to resize all items of furniture of our BIM system.
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    Fuel economy regression analyses for hybrid electric vehicle
    (2018-06-30) Minh, Vu Trieu; Moezzi, Reza; Owe, Israel
    This study analyses the modelling and simulation of different hybrid electric vehicles(HEV) from battery, DC to DC converter, electric motor and generator, operational modes, planetary gear, internal combustion engine, vehicle body, vehicle dynamics, and control system. Several HEVs are simulated based on different size on specific drive cycle, and fuel consumption is recorded for each. The optimized HEV is extracted from regression model calculated by MATLAB with different polynomial order.
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    Hololens used for precise position tracking of the third party devices - Autonomous vehicles
    (2019-01-01) Cyrus, Jindřich; Krčmařík, David; Moezzi, Reza; Kočí, Jan; Petrů, Michal
    A completely new area of HoloLens usage is proposed. The Hololens is an augmented reality device, which provides the high precision location information. Such an information is normally used to accurately position holograms within the real space with respect to the viewer (user of HoloLens). The information is precise enough to use it for reporting the position for the purpose of autonomous driving. Several experiments have been executed in vast areas (20m x 40m) in order to find out the potential error coming from vibrations or other effects when moving the HoloLens. The results show that the technology can be used for spaces, which are previously known by the system - pre-scan of the space is needed. The big advantage of the system is its readiness for indoor positioning applications with no additional infrastructure needed, simultaneous localization and mapping, complex space mapping and reached precision. The disadvantage is mainly the costs.
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    Implementation of X-Parameters Principle for Non-linear Vibroacoustic Membrane Using Two-Port Measurement
    (International Information and Engineering Technology Association, 2019-08-01) Moezzi, Reza; Hlava, Jaroslav; Vu, Trieu Minh
    X-parameters, a powerful solution to the simulation of nonlinear microwave components, can be used for other wave systems with distributed parameters. This paper introduces X-parameters to the acoustic field to deal with highly nonlinear large signals and boundary conditions. Firstly, an elastic membrane was selected to serve as the nonlinear boundary. Then, the equivalent electronic lumped model of the elastic membrane was established based on its nonlinear differential equation (NDE). The X-parameters of the model were determined by poly-harmonic distortion modelling. Then, an electrical analogy of the nonlinear system was established by two port method. The simulation and experimental results show that the properties of the elastic membrane were characterized well by the X-parameters.
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    Innovative IoT Sensing and Communication Unit in Agriculture
    (International Information and Engineering Technology Association (IIETA), 2019-08-15) Krčmařík, David; Petrů, Michal; Moezzi, Reza
    This paper aims to propose an innovative reconfigurable sensing unit, suited to be used in harsh agriculture environment. The heart of the unit is a PCB with Linux based processor which is established such a way that the unit communicates via a backend, SQL based database with a user-friendly web interface. It can aggregate several data sources: tensometers, accelerometer, temperature sensor, CAN, digital and analog inputs. It communicates via GSM and It implements GPS information to provide precise real-time position. The unit is designed to be powered with different power sources. Collection the units which are used, can be easily reached using standard private network. The backend enables the users to configure desired actions. One can choose certain data to be sensed. It is possible to configure also the data acquisition rate and time interval between two packages sent to backend. Data are available through the web interface and can be downloaded to universal format of CSV for further processing. It has been shown that the whole system is capable to monitor user defined data limits and if such a limit is reached a notification (e.g. SMS) can be sent to a predefined destination.
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    Teaching IoT using raspberry Pi based RC-Car
    (Institute of Electrical and Electronics Engineers Inc., 2020-01-01) Bisták, Pavol; Moezzi, Reza; Semeraro, Francesco; Nicassio, Giuseppina
    Internet of Things will have a great impact on human's lives and particularly in education, it determines how to implement new technologies to motivate and assist students on their studies. This paper provides description and evaluation of the course focused on the Internet of Things. The topics of both lectures and labs are designed according to the formulated goals. The final project of the course is discussed in details with several examples solved by students. The project based learning method is carefully evaluated by students and analyzed in order to enhance the quality of the course in the future.