Download or read book Robust Nonlinear Estimation and Control of Clutch-to-clutch Shifts written by Kirti D. Mishra and published by . This book was released on 2016 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automotive systems in general, and transmission systems in particular, lack adequate sensing essential to successful operation of feedback controllers; thus there is a need for observers for online estimation of important operating variables. In particular, the output shaft torque, turbine torque, reaction torque at the offgoing clutch, and online clutch pressures are critical to the performance of the nonlinear controller proposed in the current study. An observer scheme is proposed to estimate these variables, with the emphasis on robustness to modeling error and parametric variations. A combination of robust Luenberger and unknown input sliding mode observers (UI-SMO) is used to solve the estimation problem. The estimates show reasonable correspondence with the actual signals, even in the presence of appreciable parametric uncertainty.