Browsing by Author "Jain, Ayush"
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Item Characterization of a Temperature Measurement System for Use in Vacuum(Tartu Ülikool, 2020) Akintola, Adeyinka Jimoh; Vendt, Riho; Allik, Mari; Jain, Ayush; Tartu Ülikool. Loodus- ja täppisteaduste valdkondThermal vacuum tests must be performed to ensure the survivability of the spacecraft during the development and performance validation stages. To carry out these tests, vacuum compatible temperature sensors are placed on different sub-systems of a spacecraft in a vacuum chamber. For the reliability of this test, the temperature sensors to be used need to be calibrated. This work, therefore, aims at improving the temperature measurement system currently used for thermal vacuum testing at the Tartu Observatory, University of Tartu. A suitable vacuum compatible sensor was selected and calibrated in the climatic chamber using the existing measurement system available at the observatory and a new measurement system introduced in this work. Both measurement systems were characterized, and measurement and uncertainty models were designed and estimated for the measurements carried out both in the climatic chamber and in the vacuum chamber.Item Software Development for Data Analysis in Vibration Testing(Tartu Ülikool, 2019) Jain, Ayush; Vendt, Riho, supervisor; Allik, Mari, supervisor; Tartu Ülikool. Loodus- ja täppisteaduste valdkond; Tartu Ülikool. TehnoloogiainstituutRocket launches are violent and involve harsh events such as vibrations and shocks. Every structural system has its own natural frequency. When the frequency of the external forces (shocks and vibrations) syncs up with the natural frequency of the whole system, it leads to resonance. This causes the forces acting on the system to be multiplied several folds. It can lead to a structural failure or even complete loss of the system in some cases. To ensure, that every spacecraft launched in to space is able to withstand these environments, every component undergoes environmental testing on ground. To characterize and find the natural frequencies of the system, a resonance survey is performed with the vibration testing system. This is done both, before and after the system is subjected to any mechanical environmental tests. The comparison of these resonance surveys helps to identify whether or not the Device Under Test (DUT) has passed the testing criteria. In this work the vibration testing system available at Tartu Observatory, University of Tartu has been introduced along with the method for vibration testing in use. The aim of this work was to develop a software that would perform visualization and analysis of the vibration testing data. It has been made sure that the resultant plots of the software are easily customizable with the help of a Graphical User Interface (GUI), to meet specific customer requirements. In addition, the software is capable of identifying the resonances in the data which show up as peaks. It calculates the amplitude and frequency shift in the resonances to easily show the user, whether the test object has passed the tests. The developed software has been in use in the Laboratory of Space Technology at Tartu Observatory, UT for 8 months. The test certificates handed over to the customers after vibration testing has been performed, contain the plots that are generated by this software.