O5-1 GPU optimized LU decomposition and Jacobi method in transcranial magnetic stimulation, Erik MÜLLER, Bojana PETKOVIC, Marek ZIOLKOWSKI, Konstantin WEISE, Hannes TOEPFER and Jens HAUEISEN

Electric fields induced by transcranial magnetic stimulation (TMS) can be calculated by means of the fictitious surface charge method (FSCM). The models often contain hundreds of thousands of elements and can not be computed on a personal computer. In order to enable calculations on low-performance hardware, we combine an element-wise Jacobi method in a GPU-compatible framework. The induced fields are compared against an analytical solution for a homogeneous one-layer sphere model. The normalized root mean square error (NRMSE) is equal to 0.12%.    

O5-2 Optimization and analysis of interior permanent magnet synchronous motor, Vasilija SARAC

The optimization of the interior permanent magnet syncrnous motor and analysis of operating characteristics of optimized models in comparison to the starting model is the objective of this paper. Optimization is done by optimetrics analysis i.e. four motor parameters are selected and varied within certain boundaries al-lowing out of each combination of these varied parameters, new motor models the be obtained. The best candidates i.e. models with respect to the efficiency and cogging torque are selected. The optimized models have improved efficiency and cogging torque with respect to the starting model.

O5-3 Improvement the coil design parameters to achieve a high uniformity magnetic field, Karolina KASAŠ-LAŽETIĆ, Miodrag MILUTINOV, Teodora SPASIĆ and Gorana MIJATOVIĆ

A uniform magnetic field can be achieved with various simple structures of circular or square cross-sections. The main purpose of each of these is to create a larger volume of space with a uniform magnetic field. The improvement of the desired zone homogeneity can be achieved by varying the design parameters of the coil and applying different optimization algorithms. In this paper, the Lee-Whiting circular coil system has been investigated by considering the cross-section of the real conductor instead of the volumeless ideal conductor. The parameters of the coil were optimized to obtain a spherical area with a uniform magnetic field distribution and the desired total deviation rate. The numerical calculations and the optimization procedure were performed in COMSOL Multiphysics software package on a simplified 2D axial symmetric model. The obtained results show that in the case when the presence of real conductors is considered, the size of the uniformly distributed magnetic field is larger than the volume obtained from the theoretical calculation.

O5-4 Machine learning application in cylindrical permanent magnet force calculation, Natalija IVKOVIĆ, Ana VUČKOVIĆ, Mirjana PERIĆ and Dušan VUČKOVIĆ

The intention is for this paper to be the proof of concept that permanent magnet force, usually calculated using method based on fictitious magnetic charges or Ampere’s current approach, can be predicted using one of the machine learning algorithms. The application of machine learning should reduce the calculation time and allow faster simulations.

O5-5 Beamforming in uniform linear array antenna, Andy VESA and Daniela VESA

In this paper, a method to combine the adaptive beamforming with an algorithm for estimation of Direction-of-Arrival (DoA) is investigated.  It was used the Multiple Signal Classification (MUSIC) algorithm for estimation of DoA.  All the simulations are implemented in Matlab, for different number of antenna elements and for different values of SNR.