scholarly journals METHOD OF SAFE LANDING THE EMERGENCY QUADROCOPTER

2018 ◽  
Vol 8 (4) ◽  
pp. 44-47 ◽  
Author(s):  
Bohdan Blagitko ◽  
Yuriy Mochulsky
Keyword(s):  
Mathematical Modelling ◽  
Electric Motor ◽  
Free Fall ◽  
Vertical Speed

By means of mathematical modelling, the main features of emergency landing of quadrocopter are determined. The results of simulate landings of the quadrocopter in cases of failure of one of four pairs of electric motor screw are given. The methods of safe landing of an unmanned quadrocopter in case of failure of one of four pairs of motor-screw are proposed. The basis of the proposed methods is to use a parachuting effect. Parachuting achieved by forced off the power of the motor, which is located at the opposite end of the same yoke as faulty motor. As a result, the vertical speed of the quadrocopter at the time of landing significantly decreases in comparison with the speed of free fall.

scholarly journals Choice of the optimal mode of control of the process of emergency landing of an unmanned quadcopter

2021 ◽  
pp. 46-51
Author(s):  
Bohdan Blahitko ◽  
Yuriy Mochulsky ◽  
Ihor Zayachuk
Keyword(s):  
Mathematical Modeling ◽  
Electric Motor ◽  
Vertical Speed ◽  
Optimal Mode

Peculiarities of the process of emergency landing of an unmanned quadcopter have been studied by mathematical modeling. The method of landing an unmanned quadcopter in case of failure of one of the four pairs of electric motor-propeller is proposed. The basis of this technique is the application of the parachuting effect. Parachuting is achieved by forcibly turning off the power of the motor, which is located at the opposite end of the same traverse as the faulty motor. As a result, the vertical speed of the unmanned quadcopter at the time of landing is significantly reduced and approaches a relatively safe value.

Mathematical modelling of compatibility of normative and criteria evaluations

2012 ◽  
Author(s):  
Aleksandras Krylovas ◽  
Natalja Kosareva ◽  
Olga Navickiene
Keyword(s):  
Mathematical Modelling

Small Electric Motor for Amateurs

1891 ◽  
Vol 31 (783supp) ◽  
pp. 12510-12511
Author(s):  
George M. Hopkins
Keyword(s):  
Electric Motor

An Interesting Static Electric Motor

1913 ◽  
Vol 108 (1) ◽  
pp. 11-11
Author(s):  
H. B. Dailey
Keyword(s):  
Electric Motor

In vivo Analysis of Murine Pneumococcal Pneumonia for Mathematical Modelling of Community Aquired Pneumonia

Pneumologie ◽  
2017 ◽  
Vol 71 (S 01) ◽  
pp. S1-S125
Author(s):  
S Berger ◽  
C Gökeri ◽  
U Behrendt ◽  
SM Wienhold ◽  
J Lienau ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Pneumococcal Pneumonia ◽  
In Vivo Analysis ◽  
Community Aquired Pneumonia

State special primary acceleration measurement standard for gravimetry GET 190-2019

2020 ◽  
pp. 3-8
Author(s):  
L.F. Vitushkin ◽  
F.F. Karpeshin ◽  
E.P. Krivtsov ◽  
P.P. Krolitsky ◽  
V.V. Nalivaev ◽  
...  
Keyword(s):  
High Precision ◽  
Free Fall ◽  
Measurement Range ◽  
Measurement Standard ◽  
Acceleration Measurement ◽  
Measurement Systems ◽  
Free Fall Acceleration ◽  
Investigation Methods ◽  
Measurement Results ◽  
Upper Level

The State special primary acceleration measurement standard for gravimetry (GET 190-2019), its composition, principle of operation and basic metrological characteristics are presented. This standard is on the upper level of reference for free-fall acceleration measurements. Its accuracy and reliability were improved as a result of optimisation of the adjustment procedures for measurement systems and its integration within the upgraded systems, units and modern hardware components. A special attention was given to adjusting the corrections applied to measurement results with respect to procedural, physical and technical limitations. The used investigation methods made it possibled to confirm the measurement range of GET 190-2019 and to determine the contributions of main sources of errors and the total value of these errors. The measurement characteristics and GET 90-2019 were confirmed by the results obtained from measurements of the absolute value of the free fall acceleration at the gravimetrical site “Lomonosov-1” and by their collation with the data of different dates obtained from measurements by high-precision foreign and domestic gravimeters. Topicality of such measurements ensues from the requirements to handle the applied problems that need data on parameters of the Earth gravitational field, to be adequately faced. Geophysics and navigation are the main fields of application for high-precision measurements in this field.

Galilean Reflections on Milton Friedman’s "Methodology of Positive Economics", with Thoughts on Vernon Smith’s "Economics in the Laboratory"

2007 ◽  
pp. 55-70 ◽  
Author(s):  
E. Schliesser
Keyword(s):  
Experimental Evidence ◽  
Experimental Economics ◽  
Nobel Prize ◽  
Free Fall ◽  
Nobel Prize Winner ◽  
Theoretical Physics ◽  
History Of ◽  
Positive Economics

The article examines in detail the argument of M. Friedman as expressed in his famous article "Methodology of Positive Economics". In considering the problem of interconnection of theoretical hypotheses with experimental evidence the author illustrates his thesis using the history of the Galilean law of free fall and its role in the development of theoretical physics. He also draws upon methodological ideas of the founder of experimental economics and Nobel prize winner V. Smith.

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