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Statistical process control (SPC) is an approach to process control that has been widely used in any industrial or non-industrial fields. SPC is based on so called Shewhart's conception of the process variability. This conception distinguishes variability caused by obviously effected common causes from variability caused by abnormal assignable causes. New manufacturing technologies and concepts strongly...
The paper deals with several theoretical aspects connected with determination of positioning accuracy of parallel kinematic structures (PKS) with special regard to the Tricept type PKS. The conventional serial structures employ translate or rotational movement (or their combination) and their element are ordered in serial manner. On the other hand, parallel structures comprise a set of telescopic...
The article is focused on the test methods and verification of structural and technological parameters of the parallel kinematic structure - the tricept. The experiment is designed based on the standard EN ISO 9283 and involves testing of technological parameters: one-way positioning accuracy and repeatability of the position, changes of multidirectional positioning accuracy, repeatability and accuracy...
This paper presents research made for independent daily life assistance of elderly or persons with disabilities using IoT technologies. Our scope is to develop a system that allows living for as long as possible in familiar environment. This will be possible by wider spread of assistive technologies and the internet of things (IoT). We aim to bring together latest achievements in domain of Internet...
This paper presents work progress of advanced control development achieved on a prototype 100kW biomass-fired boiler. The aim of the research was to develop a complex control system, which provides both the basic boiler heating performance control based on the actual consumption and the optimization of operating conditions using advanced control algorithms. Thus, the resultant control system should...
Electromagnetic interference in frequencies below the 100 kHz range is an important part of electromagnetic interference in general. Low voltage electrical installations with voltages of 110V or 240V and with frequencies of 50/60Hz are omnipresent. They are present in some industrial environments, some office spaces and in domestic homes. These power lines are linked with electrical instruments, metallic...
Analysis of factors is important in view of the implementation of flood protection remedial measures. A comprehensive solution is possible if at the beginning there are all the relevant factors in detail characterized predominately that have got a major impact on the area in terms of flood risk and flood prevention. Three main groups of soil factors fall into their layout, forest and agricultural...
This paper deals with a time series data analysis using the concept of the fractional calculus. Simulations show the information content of a time series can be easily manipulated by the fractional derivative method. A useful Matlab functions are provided as well.
This paper deals with practical aspects of fractional-order controller implementation. Technique for digital implementation of fractional operators are presented as well as some practical notes to implementation of fractional integral and fractional derivative. Elimination of wind-up effect and limitation of derivative action are presented in order to implement such kind of controller in practice.
Due to strongly non-linear characteristics of the pneumatic muscle actuator it is necessary to have suitable dynamic model of this actuator for use in advanced control algorithms. Based on analysis of the actuator principal function and description of its main components the simulation model of the antagonistic actuator with pneumatic artificial muscles using different muscle models was designed and...
This article introduces the Wii Balance Board in the evaluation of static computed posturography. Posturography is a general term that covers all the techniques used to quantify postural control in upright stance in either static or dynamic conditions. This study focused on static posturography only. Static posturography is carried out by placing the patient in a standing posture on a fixed instrumented...
This article describes the improvement of the calibration section of gas cylinders filling plant using a system for collecting data from the gas analyzers and other sensors. The system replaces manual inspections of values measured by set of analyzers and their comparison with values from data sheets and automates subsequent manual entry in the list and accompanying tables. The system consists of...
This paper deals with description of problem with nonlinearity of 2D triangulation scanners based on oscillating mirrors, used in system for measurement of diameter and ovality of the rolled tubes. It shows attempts to field software calibration of scanners, based on multiple measurements of calibration devices and comparison between measured data and required shape.
The paper deals with industrial application of the system for measuring longitudinal deformations when welding thick-walled vessels, which is necessary to protect the weld and welded parts. Heating of the material leads to its expansion, which may for example damage the anchorage of parts, or cause collapse of the weld. To compensate the deformation it must be applied pretension, which size cannot...
In this talk, we will present an overview and, to some extent, rough classification of current existing approaches and recent progress in the field of numerical solution of partial differential equations with derivatives of fractional order (or, more precisely, arbitrary real order) with respect to time and spatial variables.
There exist mechanical devices for which it is important to retain a constant position, or a constant direction regardless of their space fitting. Classic applications of such systems include a camera stabilization in moving systems, a platform stabilization for mobile guidance systems, or other special cases. For this and other cases, it is appropriate to use the now widespread and relatively accurate...
In this paper, principles for continuous-time controllers with utilization in autotuning schemes are studied. Design and tuning of proposed controllers is performed by algebraic tools where transfer functions are regarded as elements of the field of fractions associated with an appropriate ring according to the desired properties. The emphasis of designed autotuners is laid to SISO systems with time...
Model predictive controller is being used to control system such a chemical plants, oil refineries, food industry, automotive industry etc.. It is formulated as advanced method of process control. The main advantage of MPC method is that, it is solved as optimization problem. So the method tries to minimize the needed input to achieve desired output of the controlled system. The next advantage is...
In this paper we investigated the usefulness of measuring users' eye movements as a tool for the evaluation of the user interface elements such as sliding banners. Sliding banners allow multiple pieces of content to occupy a single, coveted space, but on large or small view ports, people often scroll past sliding banners. There are cautions, considerations and limitations that should be made before...
The Mojette Transform is a mathematical transform that has approximately 20 years of research history. The transform is the exact definition of the Discrete Radon transform. Despite of the simplicity of its mathematics, this transform is a really computationally intensive procedure. The purpose of this paper is to introduce algorithms based on the Mojette Transform that the research group (composed...
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