Zhou, Zhaihe, Qianyun Zhang, Qingtao Zhao, Ruyi Chen, and Qingxi Zeng. “An Improved Principal Component Analysis in the Fault Detection of Multi-Sensor System of Mobile Robot”. International Journal of Online and Biomedical Engineering (iJOE) 14, no. 09 (September 30, 2018): pp. 82–97. Accessed April 28, 2024. https://online-journals.org/index.php/i-joe/article/view/7770.