Abstract
The estimation of dynamic behavior of aircraft gas temperature sensors (GTS) has to be done only in certified air installations and be based on recorded experimental transient response in accordance with the departmental standard. Experimental transient response has hindrances of different nature and can influence the accuracy of identification of dynamic behaviour of GTS. We suggested a new method to increase the accuracy of identification of dynamic behavior of GTS. The method is based on the use of amplitude spectrum of signal composed of experimental transient response. Shaped signal is an impulse decaying signal satisfying a Dirichlet condition and Fourier transform can apply to it to get amplitude spectrum. We worked out the relation between amplitude spectrum of shaped signals and time constant of dynamic behaviour for three mathematical models of GTS. The research showed that the information about dynamic behaviour of standard aircraft GTS is located in LF part of amplitude spectrum in the range of 0 to 1 rad/s and to 3 rad/s. The study revealed that hindrance in the transient response at frequency higher than 3 rad/s did not influence the accuracy of results if to use LF part of amplitude spectrum for the identification of dynamic behaviour of GTS. The amplitude spectrum of shaped signal can be estimated by measuring equipment like LF spectrum analyzer or calculated by software package with the function of fast Fourier transform. The value of time constant of certain mathematical model of GTS can be realized with the help of regression analysis or the use of embedded resources of different data processing systems. Thus, the method gives an opportunity to increase the accuracy of identification of dynamic behavior of GTS.
Highlights
Известно большое число методов идентификации динамических характеристик систем и технических объектов, подробно изложенных, в частности, в работах [1,2,3,4,5]
We suggested a new method to increase the accuracy of identification of dynamic behavior of gas temperature sensors (GTS)
The method gives an opportunity to increase the accuracy of identification of dynamic behavior of GTS
Summary
С целью повышения точности идентификации динамических характеристик авиационных ДТГ предложен новый метод. Метод основан на использовании амплитудного спектра сигнала, сформированного из экспериментальных переходных характеристик. Исследования показали, что основная информация о динамических свойствах штатных авиационных ДТГ сосредоточена в низкочастотной части амплитудного спектра в диапазоне примерно от 0 до 1 рад/с и с гарантией – до 3 рад/с. Установлено, что при использовании низкочастотной части амплитудного спектра для идентификации динамических характеристик ДТГ, наличие помех в переходных характеристиках с частотой выше 3 рад/с не будет оказывать влияния на точность получаемых результатов. Установление значений постоянных времени выбранной математической модели ДТГ по информативной части амплитудного спектра может быть реализовано с помощью регрессионного анализа или путем использования встроенных процедур, имеющихся в различных системах обработки данных. Показано, что предлагаемый метод позволит повысить точность идентификации динамических характеристик авиационных ДТГ.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
