Optical shop interferometer modernazation and its controling software development

Interferometrie je nejpoužívanějším nástrojem k přesnému měření optických elementů. V nedávné době byl v centru TOPTEC zrenovován hardware rovinného výrobního interferometru, avšak po stránce softwarové nedošlo doposud k žádnému progresu. Práce popisuje základní postupy a algoritmy implementované do vyhodnocovací jednotky interferometru tak, aby následovala moderní trendy optického průmyslu.Interferometry is the most widely used tool for accurate measurement of optical elements. TOPTEC have new renovated hardware manufacturing planar interferometer, but after the software so far there is no progress. This work describes the basic methods and algorithms implemented in the evaluation unit of the interferometer and to follow the modern trends in the optical industry

Prospects for the Use of Wireless Reading of Prosthetic Control Signals and Methods for Generating Commands

In order to develop effective low-cost prosthetic limbs for people with disabilities, it is proposed to implement wireless communication of sensors used to pick up control commands and prostheses. In this case, the sensors can easily be placed anywhere in the patient's body, which expands the choice of effects on the prostheses. This concept is based on the decision to abandon the built-in biosensors in order to reduce the cost of prostheses, reduce the pain of their use and expand the range of prosthetic coverage, including segments of the population with incomes below average. The paper substantiates the use of low-power mobile phone network and the use of neural networks to create individual prosthetic control algorithms. The results of the first experiments in this area are given

Prospects for the Use of Wireless Reading of Prosthetic Control Signals and Methods for Generating Commands

In order to develop effective low-cost prosthetic limbs for people with disabilities, it is proposed to implement wireless communication of sensors used to pick up control commands and prostheses. In this case, the sensors can easily be placed anywhere in the patient's body, which expands the choice of effects on the prostheses. This concept is based on the decision to abandon the built-in biosensors in order to reduce the cost of prostheses, reduce the pain of their use and expand the range of prosthetic coverage, including segments of the population with incomes below average. The paper substantiates the use of low-power mobile phone network and the use of neural networks to create individual prosthetic control algorithms. The results of the first experiments in this area are given

Domain phenomena in single crystalline and ceramic ferroics: Unresolved and attractive problems

Domain-related properties of ferroic materials offer a number of application aspects. However, some of the involved domain characteristics have not been fully explained and may initiate an interesting field of further research. Here we specify and discuss several such still unresolved problems related to single crystalline and ceramic samples. Those concerning static domain pattern include the topic of domain wall thickness and of possible macroscopic wall properties, macroscopic properties of ceramic samples depoled in different ways and application of multidomain systems in surface acoustic wave devices. Discussed problems related to dynamic domain phenomena include the issue of visibility and thickness of moving domain walls, the effect of nucleation and the topic of extrinsic contributions to macroscopic properties of multidomain samples. © 2002 Elsevier Science B.V. All rights reserved

On the Expediency and Possibilities of Approximating a Pure Delay Link

When solving problems of controlling an object with delay, it is often necessary to approximate a pure delay link with a minimum phase link in order to ensure the possibility of using analytical methods for regulator design. There are many approximation methods based on the Taylor series expansion, as well as modified methods. The most famous one is the Padé approximation method. The known approximation methods have significant drawbacks, which this paper reveals. However, there are other methods of forming other types of filters that can serve as a better approximation in determining the delay relationship, although they are not used for these purposes. In particular, methods of forming the desired differential equation of a locked-loop system of a given order by the method of numerical optimization are known. In this case, the locked-loop system behaves like a filter of the corresponding order, the numerator of which is equal to one, and the specified polynomial is in the denominator. Modeling has shown that such a filter is an effective alternative approximation of the delay link and can be used for the same purposes for which it was supposed to use the Padé approximation. The polynomial coefficients in the literature were calculated only up to the 12th order. The higher the polynomial order is, the more accurate the approximation is

Drive level dependence of the resonant frequency in BAW quartz resonators and his modeling

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