Flatness-based tracking control for a pneumatic system with distributed parameters. Issue 2 (2018)

• Record Type: Journal Article
• Authors: Gehring, Nicole; Kern, Richard
• Is Part Of: IFAC-PapersOnLine. Volume 51:Issue 2(2018)
• Page Start: 487
• Page End: 492
• Publication Date: 2018
• Subjects: pneumatic systems -- distributed-parameter systems -- partial differential equations -- model-based control -- feedforward control -- feedback control -- flatness; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2018.03.082
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: This paper considers the flatness-based tracking control design for a pneumatic system, where a tank and a proportional valve are connected via a long transmission line of approximately 20 m. Motivated by this test bench set-up and the aim to implement fast pressure changes in the tank, three distributed-parameter models of different complexity and physical accuracy are presented, involving linear and quasi-linear hyperbolic partial differential equations. A flatness-based state feedback control is derived based on a linear distributed-parameter model of the pneumatic system. In combination with flatness-based feedforward controllers, designed for two of the three models, tracking controllers are obtained. Based on a simulation model of the test bench, verified to match the measurement data almost perfectly, the controllers are shown to execute fast pressure changes in the tank very accurately.