СПОСІБ ВИЗНАЧЕННЯ КУТОВИХ ПЕРЕМІЩЕНЬ ЛОПАТЕЙ
Journal Title: Вимірювальна техніка та метрологія - Year 2018, Vol 79, Issue 1
Abstract
Article describes the features and specificity of the identification of fast moving objects, mainly vane of wind turbines and helicopter rotors. Non-contact determination methods of the point coordinates of various elements of rotating wind wheel are considered. New method and device for the high-precision determination of the deviations of multi-sectional vane of wind wheel developed elements are proposed. Blade sections are freely mounted on the wheel axle with eccentricity, which allows them to self-align and remain in aerodynamic equilibrium under the influence of wind force, the resistance to rotation from the counter flow of air and the load on the shaft of the windmill. Device for measuring the deflection angles of the vane section as function of external forces includes a laser source of visible light able to movethe bunch vertically and to fix it on a tripod and laser reflectors. The last areinstalled on the sections surfaces, in front of the wheel rotating in the wind tunnel and screen with established measuring scale. It is located behind the laser source at a certain distance from the wheel. Passing the point of encounter with the laser beam, the reflectors guide it to the screen.Value of the beam deflection is proportional to the deflection angle of the vane element. Example of estimating the change in the elements positions for multi-section vane of new type wind turbine is considered depending on the wind speed and the load on the windmill shaft. To determine the accuracy of the proposed method for different angles of wedging of the vane elements the tests are conducted. It is established that the deflection of the laser beam on the screen does not exceed two percent of the computed value. Increasing the accuracy is possible by growing the distance between the light detector and the rotating wind wheel. The method developed by the authors for measuring the angular positions of quickly rotating vane allows determine the parameters of aerodynamic characteristics promptly and exactly as well as research the promising ways forgaining the power of wind turbines. The method can also be applied for testing helicopter propellers and vane.
Authors and Affiliations
Yuliya Morgun, Ihor Prokopovich, Hennadii Oborskyi, Borys Morgun
Keywords
Related Articles
- EP ID EP530300
- DOI 10.23939/istcmtm2018.01.016
- Views 107
- Downloads 0
НЕПЕРЕРВНА АПРОКСИМАЦІЯ ХАРАКТЕРИСТИКИ ТЕРМОДІОДНОГО СЕНСОРА І ЙОГО ЧУТЛИВОСТІ СУМОЮ МНОГОЧЛЕНА Й ЕКСПОНЕНТИ З НЕЛІНІЙНИМ ПАРАМЕТРОМ
It is considered the problem of construction of the continuous and smoothed minimax spline-approximation by sum of polynomial and exponential with nonlinear parameter. The algorithm for construction so approximation with...
РЕЗУЛЬТАТИ ДОСЛІДЖЕННЯ ШВИДКОСТІ РЕАКЦІЇ ВОДІЯ ЯК ЕЛЕМЕНТУ УНИКНЕННЯ АВАРІЙ НА ДОРОГАХ
The article is devoted the study of indexes outages and difficult motive reaction on the mobile object of drivers motor-car and to electrotransport in different time of working day, their value for safety of travelling m...
ПІДВИЩЕННЯ ТОЧНОСТІ КОЕФІЦІЄНТА ПІДСИЛЕННЯ РІЗНИЦЕВОГО ПІДСИЛЮВАЧА МЕТОДОМ ДИНАМІЧНОГО ПІДСИЛЕННЯ
This paper presents the method of the reduction of the differential amplifier's gain error. Numeric modeling shows that essential increasing of the signal amplification accuracy can be achieved by applying of the dynamic...
КОНТРОЛЬ ЯКОСТІ ПІДЗЕМНИХ ГАЗОПРОВОДІВ З УРАХУВАННЯМ КОРОЗІЙНОЇ ВТОМИ, МІЦНОСТІ ТА НОРМАТИВНОЇ ДОКУМЕНТАЦІЇ
The elements of the system of the corrosive monitoring (SCM) of metallic underground gas pipelines (UGP) are considered. This system (SCM) is intended for determining the locations of damages of protective cover, and als...
ДОСЛІДЖЕННЯ ВПЛИВУ КОРЕЛЯЦІЇ РЕЗУЛЬТАТІВ СПОСТЕРЕЖЕНЬ НА НЕПЕВНІСТЬ КОЕФІЦІЄНТІВ ТА ПРОГНОЗОВАНИХ ЗНАЧЕНЬ ЛІНІЙНОЇ РЕГРЕСІЇ
In the article the results of studies of the influence of the mutual correlation of the observations to the standard uncertainty of coefficients and forecasted values of linear regression are represented. The analytical...