Construction and investigation of a method for measuring the non-stationary pressure using a wavelet transform
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 1, Issue 5
Abstract
<p>Automated control systems badly need measurements of fast-changing non-stationary physical quantities in real time, or close to that. In this area, there is a separate group of tasks on measuring the non-stationary pressure in liquids and gases.</p><p>This paper demonstrates that measuring the non-stationary pressure in real time, or close to that, represents a problem on restoring an input signal, which, in terms of mathematics, belongs to the class of ill-posed problems (according to J. Hadamard). We have derived a solution to the inverse problem of measurement that is based on a mathematical model for measuring transformation enabled by a pressure sensor. Based on this solution, we have constructed a measuring method, which implies the wavelet processing of the sensor's output signal. In this case, we suggest that such basic functions of wavelet transformation should be selected that are the modification of the pulse transition function of the sensor.</p><p> This paper reports an experimental study into the feasibility of the developed method, based on the measurement of the simulated pressure pulse. A pressure pulse is simulated by dropping a ball of the calibrated mass onto the sensor's membrane. We have proposed a measurement scheme for determining the duration of touch between the ball and the membrane. Testing the accuracy of the method implies comparing the actual mass of the ball with that derived from the sensor's output signal. The proposed method has demonstrated high accuracy because the maximum relative error in determining the mass of the falling ball was only 0.65 %.</p>The proposed method for measuring the non-stationary pressure could be used in control systems that require the high-speed dynamic correction of a measurement error. Specifically, these include control system in aerospace engineering, testing complexes, military technology, scientific research
Authors and Affiliations
Myroslav Tykhan, Taras Repetylo, Serhii Kliuchkovskyi, Olha Markina
Keywords
Related Articles
- EP ID EP666185
- DOI 10.15587/1729-4061.2019.156959
- Views 61
- Downloads 0
Study of low-emission multi-component cements with a high content of supplementary cementitious materials
<p>The studies have established the influence of various types of supplementary cementitious materials on physical and mechanical properties and structure formation of low-emission multi-component cements. The results of...
Analysis and selection of the parametric profile of a powerplant engine for a light trainer aircraft
<p>The relevance of this study is predetermined by the improvement to the fuel efficiency of an aircraft and, as a consequence, by the reduced cost of the life cycle of an aircraft engine, which is part of a power assemb...
Study and development of the technology for hardening rope blocks by reeling
<p>The study of the efficiency of hardening the parts working in spalling conditions through reeling with rollers were performed with the help of physical simulation and showed the high effect of hardening cast steels (a...
Development of the information technology for decision making support when managing refrigeration units
<p>We have studied patterns in the decision-making process related to the managerial influence on the part of the operator of a refrigerating unit as a multifactor energy system with internal and external disturbances.</...
Improvement of the method of scenario analysis of functional requirements to an information system
<p>We have considered a task on improving the base method for scenario analysis of the functional requirements to an information system (IS). The results from studies of the methods for scenario analysis of the functiona...