Abstract
Guaranteeing 100 % fault free products at minimal operational costs has become a widely accepted paradigm in practically all branches of manufacturing. In turn, the entire system of quality control has to be properly designed, with particular emphasis on final quality assessment of the products. In this chapter we present an advanced system for quality assessment of electrical motors which has been developed and successfully implemented in the final stage of the manufacturing process. The system is aimed at detecting and isolating the tiniest defects that can be caused by assembly errors as well as errors in input materials and assembly parts. The core of the system relies on innovative hardware and software modules for feature extraction which perform analysis of commutation, vibration analysis, and sound analysis. The design and performance of the diagnostic algorithms tailored to a variety of mechanical and electrical faults are presented in detail.
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Notes
- 1.
MES stands for Manufacturing Execution System.
- 2.
The Cauchy principal value is a means for assigning values to ill-defined integrals.
- 3.
A monocomponent signal is a signal in which the amplitude of only one frequency component varies as a function of time [5].
- 4.
ACID stands for atomicity, isolation, consistency and durability. Atomicity requires that all operations within the transaction either all occur, or nothing occurs, while the consistency property ensures that any transaction will bring the database from one valid state to another, and the isolation property ensures that the concurrent execution of transactions results in the same state as would be obtained if transactions are executed serially. Durability guarantees that the committed transactions will exist permanently.
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Acknowledgements
The authors would like to thank the engineering team from the company Domel for their contribution to the project. We are also grateful to the operators who openly shared their expertise on motor quality assessment. Thanks go to Andrej Biček for contributing Fig. 8.1. The authors are grateful to the Slovenian Research Agency for support under grant No. P2-0001.
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Juričić, Ð. et al. (2013). End-Quality Control in the Manufacturing of Electrical Motors. In: Strmčnik, S., Juričić, Đ. (eds) Case Studies in Control. Advances in Industrial Control. Springer, London. https://doi.org/10.1007/978-1-4471-5176-0_8
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