Lukasz Fracczak

• PhD
• Researcher at Lodz University of Technology

The development of technology aims at the introduction to the market of autonomous vehicles, meaning the vehicles able to drive without the influence of the human operator. Solving technical ad construction problems is as important as preparing the legal system for the use of autonomous cars. The first regulations are created in particular states o...

New concepts regarding Artificial Muscles (AM) are being presented in recent research studies. This paper presents a modern flexible push pneumatic actuator, which has higher elongation than most popular AM. It has good environmental adaptability, and it is always elastic during work (can bend) when most AM are rigid when pressurized. If the actuat...

Seersucker woven fabrics are characterized by unconventional structure and surface topography. Their crucial feature is a three-dimensional puckered effect created by puckered and flat strips occurring in the warp direction. Such a structure influences the basic mechanical and utility properties of the fabrics. The aim of the presented work is to a...

Friction is defined as a force resisting a relative motion between two bodies in contact. The friction of a fabric on itself or on another fabric influences significantly a fabric’s performance and user’s utility comfort, especially the so-called sensorial comfort. Generally, the coefficient of friction is determined for a given pair of materials....

This paper presents a novel design of a snake robot based on McKibben Pneumatic Artificial Muscles. The construction is created of serially connected McKibben PAMs in order to create long muscle line, which can be instantly inflated with compressed air. The innovative construction allows an achievement of efficient snake-type movement irrespective...

At present, seersucker woven fabrics are increasingly used for the manufacturing of clothing. These fabrics are created in the weaving process as a result of the different tension of two sets of warp threads: basic and puckering. Seersucker woven fabrics applied in properly designed clothing have an ability to massage the body while wearing such cl...

Recently, Minimally Invasive Surgery (MIS) robotics enters the phase of autonomous operation. However, due to the high variability of the environment, conducting a fully autonomous surgery is still extremely difficult. This paper presents a share control system, the objective of which is to suggest the optimum path of tool guidance through the use...

Availability of advanced simulation programs allowing presentation of models really close to real ones greatly reduces prototyping time and prototype creation costs. Therefore, more and more time is being spent to provide a simulation research which serve as basis for further experiments or in construction process of given device. Taking above into...

Seersucker woven fabrics are increasingly used in the textile industry. Unfortunately, their popularity is limited due to the lack of standards and parameterization of their structure. Thus, the designer of the finished product (clothing, bedding, or decorative items) has problems with ordering a fabric with a specific structure and properties. In...

Radial fans with efficiency regulation during their work using variational geometry of the rotor have not been used in industries until now, despite the fact that this is the most economically effective regulation method. One of the causes for this was the lack of a convenient method of transferring drive to moving blades of the fan. This paper pre...

Purpose The purpose of this paper is to analyse the seersucker fabrics from the point of view of their ability to ensure the thermo-physiological comfort. It was investigated how the kind of the weft yarn and seersucker structure influence the air permeability and thermal insulation properties of the fabrics. Design/methodology/approach The pape...

Seersucker woven fabrics create a unique 3D woven structure. Such 3D structure is usually received on loom by an application of two warps of different tension. However, a kind of the weft yarn also significantly influences the structure and properties of the seersucker woven fabric. The paper presents an investigation of the seersucker fabrics made...

Currently, data similarities problem as well as path averaging are being widely discussed. The authors present novel algorithms or their modifications. The main criteria of finding similarities is the accuracy of data assignment or computation time. Yet, in some cases the efficiency of finding an average path using selected method is more important...

This article describes a data fusion algorithm that uses fuzzy logic techniques. The algorithm involves weighting factors, the values of which change depending on whether the conditions dictated by processes of fuzzy logic have been met. By modifying the values of weighting factors, one can achieve a measurement signal with expected properties. The...

The paper presents the average path estimation algorithm. This algorithm is based on the approximation curve, which shape should by defined as closely as possible to the shape of the analyzed path. With the use of this initial curve, the data space is divided into the intervals. All of the interval paths points are averaged individually. After the...

The developments in surgical robotics suggest that it will be possible to entrust surgical robots with a wider range of tasks. So far, it has not been possible to automate the surgery procedures related to soft tissue. Thus, the objective of the conducted studies was to confirm the hypothesis that the surgery telemanipulator can be equipped with ce...

In this paper the servo drive with friction wheels is presented. The servo drive is designed to move the automatic laparoscope tool or laparoscope camera (thereinafter laparoscope sleeve or sleeve) in two Degrees of Freedom (DOF). The description of the drive mechanism, operating principle and mathematical model of this drive is presented. Based on...

This paper is an attempt to outline certain phenomena conditioning tertiary education: mental changes of the youth, legal changes in higher education and changes in demands and profile of the industry. In the paper the experiences of making changes in the studies program of Automatic Control and Robotics discipline at Faculty of Mechanical Engineer...

This paper presents the servo drive with force transmission by friction in two DOF. The first section describes some of the problems with surgery robots. In the second section there is shown the operating principle of the friction drive, which is a solution to the mentioned problems. The next section presents the motion control system and the senso...