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Title: Digital Data-Based PID Controller Design for Processes with Inverse Response
Keywords: Process control,Digital PID controller, Data-based tuning, Virtual reference feedback tuning, Reference model.
Issue Date: 19-Jan-2015
Citation: XU YUNCHEN (2015-01-19). Digital Data-Based PID Controller Design for Processes with Inverse Response. ScholarBank@NUS Repository.
Abstract: Controller design for processes with inverse response has attracted interest from control community since high control performance of feedback control systems is more difficult to achieve for such processes. Inverse response, which is resulted from the dynamic effect of a right-half-plane (RHP) zero, leads to smaller margin to guard against closed-loop instability and consequently the loss of control performance as a result. Various model-based controller design methods have been developed in the literature, however, the control performance may become unsatisfactory when processes are higher-order with small value of RHP zero. In this thesis, a one-step method for discrete-time proportional-integral-derivative (PID) controller design is developed within the virtual reference feedback tuning (VRFT) framework to handle processes with inverse response. In the proposed method, a newly developed second-order plus time delay reference model with one RHP zero is employed for VRFT design of PID controller for processes with inverse response. Simulation results show that the control performance is improved by using the proposed design method compared to the benchmark designs consisting of both model-based design method and the existing VRFT design methods which do not take RHP zero into account in formulating the control algorithm. Furthermore, the proposed method is extended to the nonlinear processes with inverse response. It is evident from simulation results that the proposed design provides improved performance compared to the conventional to its counterparts.
Appears in Collections:Master's Theses (Open)

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