Abstract
Agricultural machines (AMs) refer to equipment usually used in agriculture such as tractors, hand tools, and power tools. It reduces the labor work, increases farms produce, enhances goods quality, and reduces farming time and cost-saving. However, the faults in the fuel system, blades, engine of the AM will often result in degraded vehicle performance, compromising the vehicle’s efficiency and strength. To overcome these problems, fault detection algorithms are developed to identify the faults even before they occur with high classification accuracy. The deep convolutional neural network (DCNN) is a popular deep learning model that offers a high classification recognition rate, and it is widely adopted in similar fields for monitoring the health status of machines. Very few state-of-the-art works are available to identify the health state of agricultural machines using deep learning techniques and extracting the acoustic features from an audio recording. The acoustic signal-based agricultural machine health monitoring and fault prediction model using smartphones is a cost-effective option that is deployed in this proposed work. To optimize the network structure of the DCNN, this paper proposes a Levy flight optimization algorithm (LFOA). The DCNN-LFOA model is implemented on the smartphone’s on-board device (OBD) along with the health monitoring application. The LFOA algorithm minimizes the number of neurons in the DCNN hidden layer and the number of input features from the audio recordings and enhances the classification accuracy. The LFOA algorithm provides the optimal solution which is essential in developing a lightweight DCNN model to implement in the edge processor (smartphone). The experimental results prove that the proposed model gives improved accuracy for the six faults to be classified and serves as a new research model to identify the health condition of the vehicles.













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Rajakumar, M.P., Ramya, J. & Maheswari, B.U. Health monitoring and fault prediction using a lightweight deep convolutional neural network optimized by Levy flight optimization algorithm. Neural Comput & Applic 33, 12513–12534 (2021). https://doi.org/10.1007/s00521-021-05892-0
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DOI: https://doi.org/10.1007/s00521-021-05892-0