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快速非线性预测控制-Nonlinear Data-Driven Predictive Control Based on Koopman Operators and quasi-LPV Models

Tuesday, September 26, 2023 10:00 AM ~ Tuesday, September 26, 2023 11:00 AM
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    Nonlinear Data-Driven Predictive Control Based on Koopman Operators and  quasi-LPV Models

     

    Due to their considerable practical importance, fast nonlinear predictive control schemes have been receiving considerable attention over the last two decades. In this talk we present a recently developed approach to nonlinear MPC that is based on a quasi-Linear Parameter-Varying (qLPV) model of the plant. The nonlinear optimization problem is solved by iteratively optimizing the input sequence for an LTV system (using warm starts, this typically amounts to solving one QP per sampling period). Stability can be guaranteed via terminal constraints.

     

    When a first-principles model of the nonlinear plant is available, a suitable qLPV model can be constructed using a velocity-linearisation approach. Alternatively, when a first-principles model is not available, we present a data-driven approach to construct a qLPV model that is based on a truncated Koopman operator representation and can be updated online. The real-time capability of the proposed method is illustrated with experimental results on an arm-driven inverted pendulum, a robot manipulator and a control moment gyroscope.

     

     

    Biography

     

    Herbert Werner received the Dipl-Ing degree from the Ruhr University Bochum, Germany, the MPhil degree from the University of Strathclyde, UK, and the PhD degree from the Tokyo Institute of Technology, Japan, in 1989, 1991 and 1995, respectively. From 1995-98 he was with the Control Engineering Laboratory at the Ruhr University Bochum, Germany, and from 1999-2002 with the Control Systems Centre at UMIST, UK. Since 2002 he is head of the Institute of Control Systems at the Hamburg University of Technology, Germany. His research interests include linear systems theory, robust and gain-scheduled control systems, networked control systems, and modelling of uncertain, nonlinear and time-varying systems.

     

     



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