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Intelligent Machine Learning Approaches for Aerospace Applications

Sathyan, Anoop
http://orcid.org/0000-0003-2414-9515
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558309625214

Abstract Details

2017, PhD, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
Machine Learning is a type of artificial intelligence that provides machines or networks the ability to learn from data without the need to explicitly program them. There are different kinds of machine learning techniques. This thesis discusses the applications of two of these approaches: Genetic Fuzzy Logic and Convolutional Neural Networks (CNN). Fuzzy Logic System (FLS) is a powerful tool that can be used for a wide variety of applications. FLS is a universal approximator that reduces the need for complex mathematics and replaces it with expert knowledge of the system to produce an input-output mapping using If-Then rules. The expert knowledge of a system can help in obtaining the parameters for small-scale FLSs, but for larger networks we will need to use sophisticated approaches that can automatically train the network to meet the design requirements. This is where Genetic Algorithms (GA) and EVE come into the picture. Both GA and EVE can tune the FLS parameters to minimize a cost function that is designed to meet the requirements of the specific problem. EVE is an artificial intelligence developed by Psibernetix that is trained to tune large scale FLSs. The parameters of an FLS can include the membership functions and rulebase of the inherent Fuzzy Inference Systems (FISs). The main issue with using the GFS is that the number of parameters in a FIS increase exponentially with the number of inputs thus making it increasingly harder to tune them. To reduce this issue, the FLSs discussed in this thesis consist of 2-input-1-output FISs in cascade (Chapter 4) or as a layer of parallel FISs (Chapter 7). We have obtained extremely good results using GFS for different applications at a reduced computational cost compared to other algorithms that are commonly used to solve the corresponding problems. In this thesis, GFSs have been designed for controlling an inverted double pendulum, a task allocation problem of clustering targets amongst a set of UAVs, a fire detection problem and the aircraft conflict resolution problem. During the last decade, CNNs have become increasingly popular in the domain of image and speech processing. CNNs have a lot more parameters compared to GFSs that are tuned using the back-propagation algorithm. CNNs typically have hundreds of thousands or maybe millions of parameters that are tuned using common cost functions such as integral squared error, softmax loss etc. Chapter 5 discusses a classification problem to classify images as humans or not and Chapter 6 discusses a regression task using CNN for producing an approximate near-optimal route for the Traveling Salesman Problem (TSP) which is regarded as one of the most complicated decision making problem. Both the GFS and CNN are used to develop intelligent systems specific to the application providing them computational efficiency, robustness in the face of uncertainties and scalability.
Kelly Cohen, Ph.D. (Committee Chair)
Raj Bhatnagar, Ph.D. (Committee Member)
Franck Cazaurang, Ph.D. (Committee Member)
Nicholas C. Ernest, Ph.D. (Committee Member)
Manish Kumar, Ph.D. (Committee Member)
129 p.
Aerospace Materials
Genetic fuzzy logic; Convolutional neural networks; Fire detection; Aircraft conflict resolution; Multiple traveling salesman problem; Dynamic systems

Recommended Citations

Citations

  • Sathyan, A. (2017). Intelligent Machine Learning Approaches for Aerospace Applications [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558309625214

    APA Style (7th edition)

  • Sathyan, Anoop. Intelligent Machine Learning Approaches for Aerospace Applications. 2017. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558309625214.

    MLA Style (8th edition)

  • Sathyan, Anoop. "Intelligent Machine Learning Approaches for Aerospace Applications." Doctoral dissertation, University of Cincinnati, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558309625214

    Chicago Manual of Style (17th edition)

ucin1491558309625214
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This open access ETD is published by University of Cincinnati and OhioLINK.