Improved parameter tuning methods for second order plus time delay processes

K. Narayana, Lakshmi Sreekumar, Sreedevi Edamana, V. S. Sagari
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Abstract

Tuning of proportional integral and derivative (PID) Controllers for stable and unstable second order plus time delay systems (SOPTD), based on Model Driven Two Degree of Freedom PID (MDTDOF PID) and Internal model controller (IMC) are proposed in this paper. Due to inherent disadvantages of conventional control techniques, model based control techniques are employed. MDTDOF PID is developed to control and maintain a constant temperature environment in Thermo Electric Cooler (TEC) and IMC PID controller is designed to control unstable Jacketed Continuous Stirred Tank Reactor (CSTR). The performance of the proposed controllers is compared with the conventional Ziegler-Nichols (Z-N) method. The paper also presents the simulation results for both stable and unstable systems with transfer function models to show the effectiveness and advantages of proposed methods.
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改进的二阶加时滞过程参数整定方法
提出了基于模型驱动二自由度PID (MDTDOF PID)和内模控制器(IMC)的稳定和不稳定二阶加时滞系统(SOPTD)比例积分导数(PID)控制器的整定方法。由于传统控制技术固有的缺点,采用了基于模型的控制技术。MDTDOF PID用于控制和维持热电冷却器(TEC)的恒温环境,IMC PID控制器用于控制不稳定夹套连续搅拌槽式反应器(CSTR)。将所提控制器的性能与传统的齐格勒-尼克尔斯(Z-N)方法进行了比较。文中还给出了用传递函数模型对稳定和不稳定系统的仿真结果,以证明所提方法的有效性和优越性。
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