Tadeusz Mikolajczyk

Systems for Whole Body Vibration - current state of technology

Whole-Body Vibration Therapy (WBVT) is known as “biomechanical stimulation” or “biomechanical oscilation”. Application of WBVT in recreational or therapeutic framework is used in order to increase muscle strength and athletic performance. Despite the rich history of this therapy, the mechanisms underlying its efficiency and advantages remain unclear. To develop a new WBVT device intended to improve muscle and bone condition, a bibliographical research has been performed, in order to provide a comprehensive image of the technology used nowadays for WBVT and its therapeutic benefits.

Deterioration by friction on contact surfaces of the total knee prosthesis

In order to assess the wearing of polyethylene with high molecular density in knee prosthesis due to friction processes, a mathematical model of the forces at work has been developed.

An Idea of Computer Aided Eye Exercises System Based on Bates Method

Vision is one of the most important senses. As a result of different medical conditions and of changes occurring with age, vision may be disturbed or even disappear completely. In many situations ophthalmologists prescribe glasses. However, there are other methods that can provide not compensation of the visual deficits, but visual rehabilitation, providing maintenance and improvement of the quality of eyesight. These include among others, the Bates method. This method is based on the assumption that vision exercises can keep the eye muscles in good shape and maintain appropriate nutritive and oxygen supply to the eye, making possible vision without eye glasses. The paper presents an application that supports the implementation of the sight exercises by Bates concept and the results of a preliminary study applying this method.

Numerical Control System of Conventional Milling Machine

The paper presents a system of numerical control conventional milling machine, however with drives equipped with electromagnetic clutches. In control system was used relay controlled using PC. There are connected to buttons to manually panel milling machine with an electromagnetic system feeds. Developed using VB6 special software to control the machine with G-code.

Recent Advances in Biomedical Applications

As widely experimented in research and in real world application, the biomedical field is experimenting different innovations, which are associated with the contamination with the knowledge of other research branches, such as material science, engineering, biological systems, and informatics. Different technical journals proposed special issues in recent years on applications of special technologies for biomedical applications and the number of these special issues increased especially in the last ten years. For this reason, we proposed a special issue, more generally on biomedical applications, with the purpose of seeing how the land lies in these territories of the research. The result of this activity is not surely sufficient to trace the state of the art of biomedical applications but can probably help to identify some field of activity.

3D Printed Biped Walking Robot

The purpose of this paper is not to elaborate the bionic pattern of walking robot, but to elaborate our own simple idea of a 4 degree of freedom (DOF) walking robot with the ability to walk on flat surfaces, rotate and climbing upstairs, which is composed of vertical moved legs with a rotary foot and a controlled mass for stabilizing. In this paper, based on the former idea, a prototype model of a 3-DOF walking robot is presented for walking only on flat surfaces. This walking robot is actuated by servo motors. The paper covers the kinematics, centre of gravity analysis, description of the robot and its control system made using Pololu controller. Experiments confirmed the feasibility of the proposed design.

Some Methods of Research Results Approximation

The paper presents compare methods of approximation results of studies using regression analysis and neural networks. As a research facility used theoretical values of surface roughness based on theoretical values of surface roughness calculated as kinematics-geometric projection of the cutting edge on finish surface. Pointed to the limitations of the presented methods of research results approximation.

Proper LabVIEW Instrumentation of the Robot’s Kinematics and Dynamics Behavior

The most important in the study of the robots is the kinematic and dynamic analyze. Many researchers studied the kinematics or dynamics without simulation and assisted analyze that it is very heavy to understand the behavior and to show some characteristics. The paper shows one assisted method by using the virtual proper LabVIEW instrumentation (VI). For the forward kinematics (FK) and for direct dynamics (DD) was used one recurrent matrix method which was developed with quaternion algebra, that will be possible to use in many different other types of robots, only by initial settings of the type of joints, the movement axis, the home position, the dimension of each robot’s body, the application point in the working space of the manufacturing cells and the internal coordinates in each joint. For the inverse kinematics (IK) we used the Iterative Pseudo Inverse Jacobian Matrix Method (IPIJMM) coupled with the proper Sigmoid Bipolar Hyperbolic Tangent Neural Network with Time Delay and Recurrent Links (SBHTNN-TDRL). The paper describe all steps in one case study to obtain the space curve in different Euller planes by using one arm type robot and the proposed VI-s. The presented method and the LabVIEW VI-s are generally and they can be used in all other robots types and for all other conventional and unconventional space curves.