The paper presents results of research concerning the basis of utilization of PMSMs in industrial robots. A mathematical model of PMSM is described. Identification of PMSM's parameters is performed as well as an analysis of simulation and experimental investigation results of transients and steady states of electrical and mechanical quantities is presented.

The study characterizes the basic distributions of damages in elements included in the mechatronic devices: exponential, Weibull, normal, log-normal distributions. It considers some special cases, when suitability times of elements for the mechatronic system have the above four distributions, and the mechatronic device's system is created by three elements of a serial structure and various types of time distributions for elements' suitability. The order of elements is not important. The final section of this work presents a case, when four elements work in the serial structure. Suitability times of these elements have different types of distributions.

The paper presents a test stand and a special control system with data acquisition for the experimental analysis of physical quantities during a vehicle crash test. The crash tests are carried out at low speed of a trolley with a dummy with various seat belts (from 2-point seat belts to multi-point seat belts). Particular elements of the test stand and the control system are characterized and the measuring apparatus is presented. The measuring apparatus allows to register and specify displacements of the parts of the dummy's body, the values of forces in the safety belts and the values of deceleration on individual parts of the dummy body. During the experimental investigations, the waveforms of forces in the 3-point hip and shoulder parts of the belt in the range of crash speed 15.54-17.48 km/h were determined. Using the approximation method, the empirical relationships between the value of crash speed and the values of forces in the seat belts were determined. The results showed that despite the low speeds, the values of forces between the dummy and the 3-point belts reach significant values of up to 5 kN with the dynamic increase rate of 30 kN/s.

This paper presents selected characteristics of the metallic porous materials produced by the sintering of metal powders. The authors focus on materials produced from the iron powder (Fe) of ASC 100.29 and Distaloy SE. ASC 100.29 is formed by atomization and has a characteristic morphology. It consists of spherical particles of different sizes forming agglomerates. Distaloy SE is also based on the sponge-iron. The porous material is prepared using the patented method of sintering the mixture of iron powder ASC 100.29, Fe(III) oxide, Distaloy SE and Fe(III) oxide in the reducing atmosphere of dissociated ammonia. As a result, the materials with open pores of micrometer sizes are obtained. The pores are formed between iron particles bonded by diffusion bridges. The modelling of porous materials containing diffusion bridges that allows for three-dimensional (3D) imaging is presented.

The article presents a general description of the safety problem in Polish road transport in the years 2002-2019. The number of road accidents was analyzed in detail, taking into account the division into side, front and rear collisions and the dynamics of their changes. The article contains information on the dynamics of changes registered in passenger vehicles and trucks in Poland in the years 2000-2018. Moreover, the number of fatalities in road accidents in the years 2002-2019 was presented, taking into account the type of collision. The forecasts of changes in the number of road accidents and rear collisions presented in the article show the downward trend for the years 2020-2030. frontal collisions. An inconspicuous rear collision by not braking a speeding vehicle carries a high risk of damage to the upper cervical spine. As a result of such a collision, even at a low speed of 20 km/h, they can cause irreversible health effects, which lead to permanent disability.

The paper aims to present the concepts of an innovative, integrated visitor support system for distributed entertainment parks, based on Internet of Things (IoT) technology and Big Data analysis. The proposed system will include logistical functions to streamline the customer service process in the centers, offering a profiled tourist product based on unique natural or thematic value. Basing on the modular structure, implementation and integration of the modern IT network, tracking and monitoring technologies, Fog Computing, decision support system and Big Data concepts, it is planned to create a flexible, scalable, reliable, fault tolerant and high security product, corresponding to the expectations of the potential recipients.