Wyniki wyszukiwania - Biblioteka Nauki

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Synteza układu sterowania dla przyspieszeniomierza magnetycznego

100%

Gosiewski Z. , Grzegorczyk T.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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1998

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tom z. 51[168], t.1

279-286

PL

W referacie przedstawiono metodę syntezy układu sterowania ruchem masy inercyjnej w zawieszeniu magnetycznym dla przyspieszeniomierza. W matematycznym modelu obiektu uwzględniono zidentyfikowaną dynamikę elementów składowych układu rzeczywistego. Syntezy dokonano pod kątem uzyskania określonych własności dynamicznych przyspieszeniomierza: pasma przenoszenia i współczynnika tłumienia. W referacie przedstawiono opis oraz wyniki badań symulacyjnych, mających na celu określenie wrażliwości układu na zmiany parametrów punktu pracy oraz na rozrzut wartości zidentyfikowanych parametrów.

EN

In mentioned paper we designed the current control system of magnetic suspension. The displacement of the mass was estimated from current and magnetic flux signals. The control circuit contained the Hall probes as a sensors, PID controller, and magnetic flux amplifiers. In the case of assumed ideal (without dynamics) sensors and amplifiers such system perfectly worked as it was shown in the computer simulation. Later, during identification procedure of the laboratory model of the accelerometer, it appeared that the used amplifiers and probes were first-order inertial members with time constants of 0.008s and 0.005s, respectively. This additional dynamics caused that the system became non-controllable for the PID controller. The rearrangement of the current control scheme allowed us to design the state feedback control system of magnetic suspension without any changes in the measurement path. In that case the open-loop system was observable and controllable. The pole placement method was used to calculate the gain matrices of controller and full-order observer. The computer simulation confirmed the analytical considerations.

2

Patent protection: Fuctions and weaknesses

100%

Grzegorczyk T. , Glowinski R.

Intercathedra

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2017

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tom 33

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nr 2

EN

While patent protection has been established for many centuries, its criticism has been growing. The aim of this article is to identify the main functions of the patent protection system as well as its weaknesses. This article shows that main functions of patent protection may be grouped into following categories: protection, information disclosure, trade and finance, defensive functions and an input in the innovation process. On the other hand, main weaknesses of patent protection system are: slowing down the technological progress, hindering the commercial application of innovative ideas, possible hostile take-overs of patent owners, creating barriers to innovation due to complementary patents and patent thickets, patent wars and patent trolls. Despite those downsides, patent protection system seems to be unrivaled.

3

Cyfrowy kompas magnetyczny

100%

Grzegorczyk T. , Ortyl A.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2001

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tom z. 56[186], t.1

153-160

PL

W referacie przedstawiono strukturę techniczną, algorytmy obliczeniowe, model laboratoryjny oraz oprogramowanie cyfrowego kompasu magnetycznego. Do pomiaru niezbędnych wielkości fizycznych wykorzystano trzyosiowy magnetometr flux-gate oraz przyspieszeniomierz. Wahania kursu wyeliminowano stosując programowy dolnoprzepustowy filtr nieliniowy. Dewiację magnetyczną skompensowano na drodze obliczeniowej. Do wyliczenia deklinacji magnetycznej wykorzystano model pola magnetycznego WMM-2000. Przeprowadzono analizę błędów wykonanego kompasu.

EN

This paper describes technical structure, computational algorithm, laboratory model and software of digital magnetic compass. Three-axes flux-gate magnetometer and accelerometer were used to measure necessary physical quantities. Heading instability was cancelled by non-linear low band software filter. Deviation was compensated by software method. Magnetic declination was computed utilizing WMM-2000 model. Errors budget was analysed.

4

Patents as firm’s innovativeness indicator: advantages and disadvantages

100%

Grzegorczyk T. , Glowinski R.

Intercathedra

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2016

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tom 32

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nr 2

EN

There is undisputed need to properly measure innovativeness and patent data is commonly used in order to achieve that. However, its drawbacks are rarely taken into account. The aim of this article is to identify main advantages and disadvantages of using patents as innovativeness indicators - based on the literature analysis. Authors conclude that patents are valuable innovativeness indicators, which among others are very accessible and easy to use, but on the other hand they cannot be regarded as universal, as they have significant drawbacks and thus may lead to false conclusions. Therefore, it is still advised to use patent data, but only if being fully aware of their limitations.

5

Nowe dane o występowaniu rzadkich i zagrożonych gatunków chrząszczy (Coleoptera) w Puszczy Niepołomickiej koło Krakowa

61%

Rossa R. , Wojas T. , Michalcewicz J. , Przewozny M. , Baraniak E. , Brzeski M. , Grzegorczyk T.

Wiadomości Entomologiczne

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2018

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tom 37

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nr 4

EN

The paper presents unpublished information on the occurrence of rare and endangered beetles (Coleoptera) in the Niepołomice Forest near Kraków in 1993–2017. Faunistic data on the occurrence of 28 species of beetles, representing the families of Carabidae, Cleridae, Monotomidae, Coccinellidae, Elateridae, Eucnemidae, Lampyridae, Melandryidae, Mycetophagidae, Ptinidae, Scarabaeidae, Staphylinidae, Throscidae, Trogossitidae, and Zopheridae, are presented together with short descriptions of identified species.