Кваліфікаційні роботи здобувачів вищої освіти кафедри аерокосмічних систем управління

Permanent URI for this collectionhttp://er.nau.edu.ua/handle/NAU/45363

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Browsing Кваліфікаційні роботи здобувачів вищої освіти кафедри аерокосмічних систем управління by Author "Zherevchuk, Vadim Vasyliovych"

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    The determination and analysis of microelectromechanical accelerometer bias drift components using the Allan varianc
    (National Aviation University, 2024-06-14) Zherevchuk, Vadim Vasyliovych; Жеревчук, Вадим Васильович
    High performance capacitive MEMS accelerometers are increasingly being used in various motion sensing applications including medical, industrial, and military requiring measurement of acceleration, vibration, shock, tilt, rotation etc. In a wide range of inertial navigation applications, tactical grade MEMS accelerometers are already the preferred solution due to their small size, low power consumption, and convenient price; however, in Inertial Measurement Units (IMU) and Inertial Navigation Systems (INS), which are designed for navigation grade applications, conventional non-MEMS accelerometers are generally used, such as electromechanical servo and bulk piezoelectric accelerometers. During the past decade, design and initial measurement results of closed-loop MEMS accelerometers were presented, showing the potential of the MEMS technology to deliver a smaller and cheaper sensor while realizing inertial navigation grade performance. In order to achieve navigation grade performance, high linearity (<0.1%) is an important parameter to satisfy. Linearity may be limited by the capacitive nature of MEMS sensors in which output is inversely proportional to the gap change in the sense capacitor. Closed-loop MEMS accelerometers, which use electrostatic force feedback, balance the sensor structure around its nominal position, neutralizing the influence of the sense capacitor nonlinearity. There is a variety of system design challenges towards attaining navigation-grade level. Firstly, a linear and stable feedback pass must be established. In addition to the improved linearity, other parameters such as short- and long-term bias, scale factor stability, and vibration rectification error (VRE) need to be addressed from the design level in order to satisfy all the requirements during the integration of the sensor system. In today's technological world, microelectromechanical accelerometers (MEMS accelerometers) occupy a special place among sensors, playing an important role in many areas of science and technology. Their applications range from consumer electronics devices to industrial systems, from medical equipment to autonomous vehicles. MEMS accelerometers can measure acceleration with high accuracy and speed, making them indispensable for many applications where measurement accuracy and device miniaturization are important. This paper is devoted to an overview of the types of MEMS accelerometers, including pendulum and vibration accelerometers, their operating principles and practical applications. By exploring their structure, functioning and capabilities, we will gain a deeper understanding of these important devices and their role in the current technological paradigm. This paper will present an analysis of current achievements in the field of MEMS accelerometers, their advantages, disadvantages and prospects for further development. Specific examples of MEMS accelerometers in various fields will also be considered, which will allow to present a wide range of possibilities of these devices.