
Development of the hydraulic system of the Stewart platform
The Stewart platform allows simulation in six degrees of freedom. It consists of two irregular hexagons connected by six actuators – hydraulic cylinders. The controlled simultaneous retraction or extraction of the piston rods from the tubes of the hydraulic cylinders changes the length of each leg, achieving the movement of the upper moving platform, which is described using a mathematical background.

Compatibility of filtering materials with ionic hydraulic fluids
Efficient filtering is often crucial in the field of machines and devices, as the safe, reliable, and long-term as well economical operation of the entire system depends on the efficiency of the filter. This is especially true for heavily loaded hydraulic devices. In these devices, the efficiency of the filter and the ability to filter depend on various factors.

Development of miniature proportional hydraulic valve to control the movements of a humanoid robot
To control a hydraulic humanoid robot, it is necessary to design and optimize a hydraulic proportional valve with the lowest possible mass and size. The valve for the robot’s rapid movements must not only be compact, but also allow high flow rates while minimizing internal leakage.

Development and practical use of premium hydraulic oil on mineral basis
In the introduction of the paper, the requirements encountered in modern machines and hydraulic equipment will be stated. The mutual impact between machine requirements, lubricant quality and specifications will be shown.

Nonlinear velocity control of electrohydraulic rotational servo system
This paper studies the closed-loop control of an electrohydraulic velocity servo system with the use of the Lyapunov theory of nonlinear systems using integrator backstepping.

Business and technological aspect of process informatization and automation in industrial practice
Digital transformation brings great technological and business challenges to organizations. It helps to change the patterns of business operations and has the effect of increasing innovation and competitiveness. At the same time, this is a great opportunity to develop and introduce many positive changes to the existing business and process model.

Load-bearing lattice structures and segmentation
Due to their simplicity and versatility, load-bearing lattice structures allow construction in hard-to-reach areas, as they are easy to transport, easy to install and do not take up much space. Established engineering practice uses a modular structure design where the load-bearing structure is divided into height segments. In the presented study, we question the appropriateness of such an approach.

Testing the impact of light conditions on image quality for optical inspection of surface defects
Contactless and automated optical inspection tools make headway in comparison to tactile methods in modern factories. In order to develop an advanced optical tool for inspection of metal components produced for the automotive industry, one faces a number of challenges.

A setting of accelerometer’s parameters for prevention of impacts and movements of washing machines at low rotational speed of drum
Nowadays, vibrations are listed as among the most difficult challenges in the research and development of washing machines. This paper shows the method and procedure of setting up parameters for improvements of the performance of the washing machine by implementing the accelerometer.

A nonlinear model of positioning electrohydraulic servo drive
The highly nonlinear nature of the electrohydraulic servo system is well known. The main reasons for nonlinear and non-differentiable mathematical descriptions of systems dynamics are fluid compressibility, leakage flows, friction forces, and nonlinear fluid flow through servo valve orifices.