Abstract
One of the most important areas in the robotics industry is the development of robots capable of working in hazardous environments. As humans cannot safely or cheaply work in these environments, providing a high level of robotic functionality is important. Our work in this area focuses on a fault detection method known as analytical redundancy, or AR. In this paper we discuss the application to a hydraulic servovalve system of our novel rigorous nonlinear AR technique. AR is a model-based state-space technique that is theoretically guaranteed to derive the maximum number of independent tests of the consistency of sensor data with the system model and past control inputs. Conventional linear AR is only valid for linear sampled data systems. However, our new nonlinear AR (NLAR) technique maintains traditional linear AR’s mathematical guarantee to generate the maximum possible number of independent tests in the nonlinear domain. Thus NLAR allows us to gain the benefits of AR testing for nonlinear systems with both continuous and sampled data.
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Leuschen, M.L., Walker, I.D., Cavallaro, J.R. (2003). Nonlinear Fault Detection for Hydraulic Systems. In: Caccavale, F., Villani, L. (eds) Fault Diagnosis and Fault Tolerance for Mechatronic Systems:Recent Advances. Springer Tracts in Advanced Robotics, vol 1. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45737-2_6
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DOI: https://doi.org/10.1007/3-540-45737-2_6
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