An optimized excitation signal design for identification of PWA model and application to automotive throttles. (March 2023)

• Record Type: Journal Article
• Authors: Ren, Zhenxing
• Is Part Of: Measurement and control. Volume 56:Number 3/4(2023)
• Page Start: 844
• Page End: 856
• Publication Date: 2023-03
• Subjects: System identification -- PWA-model -- excitation signal design -- automotive throttles; Automatic control -- Periodicals; Engineering instruments -- Periodicals; Production engineering -- Periodicals; 629.8
• DOI: 10.1177/00202940221135903
• Languages: English
• ISSNs: 0020-2940

Abstract

In the automotive application for Electronic Control Units (ECU), dynamic models with high-precision to simulate mechatronic actuators are required for various analysis and design tasks like Hardware-in-the-Loop (HiL) simulation. It is known that the modeling of systems with significant friction effects is not accessible. The piecewise-affine (PWA) model has recently attracted considerable interest due to its high approximation capability for modeling systems with friction. Because the model quality depends intensely on the test signal design, a model-free optimized excitation signal design for identifying PWA models is presented in this paper. The presented method is demonstrated with an automotive throttle, and a PWA model is identified with a four-step identification approach. The result shows that the optimization method can achieve a better model quality, which is sufficient for the HiL simulation.