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Selected Works

Dr. Ajay Mahajan

Rockets

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Intelligent Real Time Data Interpretation Of Rocket Test Data To Identify Sudden Transitions, Ajay Mahajan, Christopher Oesch, Fernando Figueroa Apr 2015

Intelligent Real Time Data Interpretation Of Rocket Test Data To Identify Sudden Transitions, Ajay Mahajan, Christopher Oesch, Fernando Figueroa

Dr. Ajay Mahajan

Integrated Systems Health Monitoring (ISHM) is an implementation of monitoring strategies for complex systems whereby avoiding catastrophic failure, extending life and leading to improved asset management. An ISHM generally encompasses intelligence at many levels and sub-systems including sensors, actuators, devices, etc., but this paper focuses on only smart sensors. Wavelet analysis is used to enhance previous work done in this area. The major advantage provided by adding wavelet analysis is the ability to detect sudden transitions as well as obtaining the frequency content using a much smaller data set then that required by the traditional Fourier transform method. Historically, sudden ...


Application Of Intelligent Sensors In The Integrated Systems Health Monitoring Of A Rocket Test Stand, Ajay Mahajan, Sanjeevi Chitikeshi, Lucas Utterback, Pavan Bandhil, Fernando Figueroa Apr 2015

Application Of Intelligent Sensors In The Integrated Systems Health Monitoring Of A Rocket Test Stand, Ajay Mahajan, Sanjeevi Chitikeshi, Lucas Utterback, Pavan Bandhil, Fernando Figueroa

Dr. Ajay Mahajan

This paper describes the application of intelligent sensors in the Integrated Systems Health Monitoring (ISHM) as applied to a rocket test stand. The development of intelligent sensors is attempted as an integrated system approach, i.e. one treats the sensors as a complete system with its own physical transducer, A/D converters, processing and storage capabilities, software drivers, self-assessment algorithms, communication protocols and evolutionary methodologies that allow them to get better with time. Under a project being undertaken at the NASA Stennis Space Center, an integrated framework is being developed for the intelligent monitoring of smart elements associated with the ...