František Novotný's research while affiliated with Technical University of Liberec and other places

Publications (23)

Article
Full-text available
This article presents a basic study of knowledge in the research and development of specific gripping elements based on the principle of adhesion. It summarizes the use of materials with a high degree of surface adhesion in the design of gripping elements usable in industry to provide stable gripping of objects during automatic manipulation. The pr...
Preprint
Full-text available
This article presents a basic study of knowledge in the research and development of specific gripping elements based on the principle of adhesion. It summarizes the use of materials with a high degree of surface adhesion in the design of gripping elements usable in industry to provide stable gripping of objects during automatic manipulation. The pr...
Article
Nuclear power plants, as one of the cornerstones of today's global and, most importantly, European energy sector, place considerably high demands on all stages from design and construction, through operation and control, to safe decommissioning at the end of the facility's life. A relatively large decommissioning process is underway in Europe, whic...
Article
Modifications to the surface structure of float glass are among the most common application procedures of a given material used in many industries, especially in the building industry and housing architecture. The aim is to reduce the transparency of otherwise clear soda-lime glass. Typically, the chemical technology of acid-etching or the mechanic...
Article
The tab and slot plug welding method applied to frame construction represents an interesting and low-cost construction system. Regarding the materials used, it is possible to create both unique lightweight aluminium frames, applied to service robots or effectors, as well as conventional steel frames for machines and peripherals. This article firstl...
Article
Full-text available
This contribution presents the research results of flat glass mechanical frosting with the use of brushing by abrasive composite filaments containing diamond particles. The technology has a great potential to replace the currently used mechanical frosting technologies, such as sandblasting. It also offers an environmental friendly alternative to co...
Article
Full-text available
Mechanical disintegration of glass surface layers by the action of composite filaments of a cylindrical brush is a new and unique technology for flat glass frosting. So far, similar tools have been used for metal treatment, e.g. for tool edge grinding or for surface treatment of stainless metal sheets. The technology has a high application potentia...
Article
The paper focuses on problems of the safety operation of service robots on glass facades of high-rise buildings exposed to a local additional load during the robot motion and any subsequent service operation (e.g. cleaning, diagnostics, mounting). Owing to afraid of a possible glass cracking and a subsequent destruction, the authors pay attention t...
Article
The paper describes possibilities to use industrially adhesive gripping elements in automatized handling processes especially for flat objects but also for objects slightly dissected according to height (e.g. sheets of glass, plastics, metals, plastic products etc.) which have dry, relatively clean, and smooth contact surfaces. It begins by analyzi...
Article
The paper analyses one of possibilities to use new materials based on polyurethane, polypropylene or silicone having highly adhesive contact surfaces for gripping elements designing. In concrete terms, it is a case of an alternative approach to the solution of designing standard multielements vacuum gripping heads with an active control system (vac...
Article
The paper sums up results achieved during in the last few years of the development and research of service robots aiming their use for service applications on vertically oriented walls with predominantly smooth contact surfaces having minimal altitude unevenesses within the range ± 5 mm. Two robot generations are described step by step, and both of...
Article
The corrosion behaviour of Fe-40Al-Zr (at.%) has been investigated in molten soda-lime glass at 1200°C. The measurement of weight loss and surface change were used for explanation of the corrosion resistance. The alloying by 0.09 at.% Zr reduces the corrosion resistance of Fe-40Al-Zr against molten soda-lime glass in comparison with earlier tested...
Article
The corrosion behaviour of Fe-40Al-Zr (at.%) has been investigated in molten soda-lime glass at 1200 °C. The measurement of weight loss and surface change were used for explanation of the corrosion resistance. The alloying by 0.09 at.% Zr reduces the corrosion resistance of Fe-40Al-Zr against molten soda-lime glass in comparison with earlier tested...
Article
The paper analyses possibilities to use new materials having a high degree of adhesion for designing vacuum gripping elements with a view to increase the radial capacity and at the same time to preserve the compressed air consumption or the vacuum level. Structural modification of the suction cup is presented with a bearing supporting plate having...
Article
The paper submitted presents a new-generation mobile platform specially designed for the service robot destined for motion on vertical oriented walls, e.g. on glass façade systems of tower buildings. The platform has been developed goal-directly as a motive system allowing special technological extensions to be installed with a view to inspecting,...
Article
The paper submits a computer analysis of a vacuum gripping element, a suction cup with the rigid supporting plate, loaded radially. Results of the computer simulation are used when designing new vacuum gripping elements which have a function of a controlled modification of the friction behaviour and adhesive properties of the element contact surfac...
Article
Full-text available
An objective system for evaluating corrugations in float glass sheets is described. The system uses a zebra plate and image analysis including fractal analysis to assess the quality of float glass in an objective manner. The system has been used successfully in an off-line production environment for two years.
Article
In the study, the mechanical behaviour of the robot, end effector – object – end effector, robot system is analyzed in terms of external forces affecting robots and their grippers as well as deformation forces influencing on the glass sheet through grippers provided that the robot kinematical structure and vacuum gripping head form an absolutely ri...
Article
A lot of natural structures in industry applications can be hardly described by conventional methods - statistic tools, because they are complex and irregular. A relatively new approach is the application of fractal geometry that is successfully used in science, but an application in industry is sporadic and experimental only. However, the fractal...
Article
The paper deals with the problem of numerical simulation of contact between compliant gripping element and rigid object of handling. Compliant gripping element is represented with a rubber suction cap and the handling object is comprised by rigid plate. Contact is researched under various load conditions taking account to chosen material of suction...
Article
Full-text available
Fractal dimension with statistic tools is powerful tool for a complex data quantification, for a poor quality source searching, a production optimalization and a non-stability of a production process subsystems searching. The data having complex and structured character can be also met during a glass manufacturing. The data may have a form of digit...

Citations

... The acoustic method uses acoustic sensors to monitor the robot's position, but it is susceptible to environmental noise and requires high sensitivity of the acoustic sensors. Moreover, when a robot stops running due to unexpected factors, it cannot be located [9,10]. The electromagnetic wave method uses magnetic sensors to receive electromagnetic wave signals emitted by the pipeline robots for localization with little external interference [11][12][13]. ...
... Although abrasive filament brushes have been successfully used for manual and automated applications, including burr removal [1,2], edge rounding [3], polishing [4,5], and frosted glass [6,7], they show poor consistency of machining quality due to the fast wear of the nylon filament [8]. To improve the disadvantage of existing brush-type surface finishing tools, the ceramic fiber brush has been developed and applied to deburring parts, showing better durability and machinability [9,10]. ...
... Fe-based alloys used in the automobile industry have undergone dramatic development with particular effort for achieving an ideal balance of strength, cost and formability [1,2]. Based on the techniques combining the manufacturing process optimization [3] and the structural design of body parts [4,5], the advanced high strength steels (AHSSs) have played a significant role in the lightweight activities [6][7][8]. Though the production of the first-generation automotive steel is quite economical, like dual phase (DP, realizing mass production in 1983) and transformation induced plasticity (TRIP) steels, yet unfortunately the corresponding product of strength and elongation (PSE) was unsatisfactorily below 20 GPa⋅%, which mainly due to their low plasticity [9]. ...
... However, different perspectives have been proposed on the availability and protectiveness of such an alumina layer. Previous studies on Fe-Al alloys indicate that the Al-containing alloy is capable to form Al 2 O 3 layer in molten glass and thus slows down the corrosion rate [16,17]. However, Abdullah [18] found that Ni-8Al-28Cr alloy cannot be used in molten glass because of the extremely high solubility of Al 2 O 3. ...
... Axinte et al. [12] pointed out that belt polishing is preferred for its high material removal rates, and bob polishing can represent the only engineering solution allowing small-radii geometrical access. Rotating polishing tools can take various forms, such as abrasive cap tools [13], polyurethane elastomer (PUE) tools [14], shape adaptive grinding (SAG) tools [15], rubber-based bonnet tools [16], flap wheel tools [17], and brush tools [18]. The common characteristic of the above polishing tools is that they all have a certain degree of compliance. ...
... The methodology, which is very useful for defining the extent of oxidation attack, is based on the compass method used to describe a dividing line (boundary curve or borderline) [25,26,[30][31][32][33][34]. The used methodology is described in more detail in [25]. ...
... On the basis of the calculation using the finite-element method, three principal limit states can be defined (Figure 9) for the selected type of the active suction cup of the holding system which correspond to the suction cup contact profile depending on the level of external radial force according to the force analysis carried out in detail in Ref. [22]. ...
... The platform frame is connected with four legs by means of pivoted cranks. Each leg is fitted with suction cups and an individual electric rotary servo drive [16]. ...
... However, the fractal dimension does not substitute other tools like statistics; the dimension provides additional information about the data. Previous research [15,[20][21][22][23][24] shows that fractal dimension in conjunction with statistics can be used as a useful and powerful tool for an explicit, objective and automatic description of production process data (laboratory, off-line and potentially on-line). ...
... digital, classical photographs, images from electron microscopes), time series (e.g. analyses for monitoring and control systems) (9) and topological one dimensional dividing lines (10) (e.g. profiles, roughness and the dividing line between light and shadow). ...