Abstract: When designing unique optomechatronic systems with the application of innovative solutions, decision making with respect to a number of technical and economic criteria seems to be an essential problem. The multi-criteria decision theory is a process of selecting the best solution to the set of alternatives. The paper presents the application of the TOPSIS method for working towards a solution to decision making in the process of designing a unique measurement vision system. The set of alternatives for the vision system has been considered with regard to benefit and cost criteria. As a result, the best alternative has been identified, which represents the highest similarity to the ideal solution expressed by the value of the relative closeness index.
Abstract: The most important factor in aviation safety is a well-trained pilot. Ground simulation is the primary element in modern pilot training. Aircraft technical development certainly increases requirements for young flying adepts. So far aging equipment like TS-11 “Spark” is used for practical training (on the ground and in the air) in Polish Air Force Academy. There are no advanced systems on board in this plane, so the basic theoretical and practical knowledge about up-to-date on-board aircraft systems for military pilots’ students needs to be provided. In the near future, some of them will fly by F-16 and this knowledge will help them faster and easier improve their flying skills.
Abstract: Part II of the publication concerns the next module of the project on the virtual cockpit. It is a very useful and handy educational tool for young flying adepts and ground personnel who can improve their knowledge about F-16 on-board operations on avionics and armament systems. The students (pilots and technicians) can also get familiar with integrated on-board diagnostics subsystems. Moreover, the paper examines a possibility of analysing malfunctions and faults faced during flight and within the process of maintenance.
Abstract: In the paper, the numerical and experimental approach to the blast load evaluation was presented. The evaluation process is done in two steps. In the first, the full scale blast test is carried out with a simply mock-up resembling geometry of the bottom part of a vehicle. The pressure impulse is measured indirectly using a high speed camera and the motion analysis software. In the second step, a numerical simulation with the use of Multi Material Arbitrary Lagrangian-Eulerian method is utilized to assess the influence of the fluid-structure interaction and the real vehicle mass on the value of the applied pressure impulse. In the paper, the application of method was presented and the results were discussed.
Abstract: The article discusses the issues regarding the identification process of the ballistic impact on a shield of composite construction. Using a mathematical model of the phenomenon of piercing the material with a bullet fired from a firearm, it has been assumed that the resisting force F of the material is described by a non-linear function consisting of the elastic element and the dissipative element. Identification equations have been derived for specific structures of the model. The studies related to the response of the model to pulse load have been conducted by numerical simulations the results of which have been verified by the tests conducted in a shooting range.
Abstract: Some results of tests of the thermal stability (and volatility) of selected ionic liquids pondered as lubricating substances in comparison with typical lubricating, mineral and synthetic oils, are presented in the article. The research was carried out within the framework of PBR/15–249/2007/WAT–OR00002904 Research Project Financed by the Ministry of Science and Higher Education, during 2007–2011 . The obtained results confirmed high thermal resistance of ionic liquids. It makes it possible to use the liquids as high temperature lubricating substances. At the same time, it has been stated that the thermal resistance of ionic liquids depends on the composition and chemical structure of anion and cation.
Abstract: The conducted research describes the design of production lines with pneumatic, partly pneumatic, electrical and other types of control implementation and analyses two control system cases. The first one of emergency breaking and design of an additional control system for emergency regulation of the production line is based on a direct regulation principle. The second case of the factory comprises a number of wood briquette automated production lines and is based on the application of control networks for industrial process control and alarming. The paper discusses advantages and disadvantages of control approaches.
Abstract: This paper presents the results of research into the effect of the use of an additive to the lubricating oil SAE 15W/40 on the lubricating properties (standardised tests), i.e. the weld point Pz, last non-seizure load Pn, load-wear index Ih, and seizure load Pt. The friction pair consisted of four balls and the tested lubricant. Moreover, the impact of the use of the lubricating oil (non-standardised tests) on tribological properties such as friction force, wear, and the temperature of the friction area for the friction pair C45 steel/210Cr12 steel, was explored. The additive contained copper and lead particles of the size of a few micrometers. The tests helped to determine the effect of the use of the additive to the lubricant on the formation of the operational surface layer. The results were used to build a model of the boundary layer formed as a result of the additive to the lubricating oil.
Abstract: The paper presents the results of tests on the distribution of hydrodynamic pressure in relation to the viscosity of a lubricant, the rotational speed of a journal and bearing load. Two different lubricants were selected for taking tests: base oil SN-150 and mineral engine oil. The distribution of hydrodynamic pressure was determined employing a device constructed for this particular purpose. It has been proved that the type of the lubricant, bearing load and, to a lesser extent, the rotational speed of the journal affect the distribution of hydrodynamic pressure.
Abstract: One of the most commonly used actuators in industry are DC motors because of their relative control simplicity, small dimensions and a low price. The paper analyses a DC motor with focus on speed control using two different approaches. First, a mathematical model of the DC motor is introduced. For controller design, two methods, namely the frequency shaping method and PWM control, are used. Both approaches are simulated and compared to each other. For running simulations, software Matlab/Simulink has been applied. The conclusion discusses the advantages and disadvantages of the employed control methods. The contribution of the paper brings information about the advantages and disadvantages of approaches.