Practical Tuning Rule Development for Fractional Order Proportional and Integral Controllers

Journal of Computational and Nonlinear Dynamics - Tập 3 Số 2 - 2008
YangQuan Chen1, Tripti Bhaskaran1, Dingyü Xue2
1Center for Self-Organizing and Intelligent Systems (CSOIS), Department of Electrical and Computer Engineering, Utah State University, 4120 Old Main Hill, Logan, UT 84322-4120
2Faculty of Information Science and Engineering, Northeastern University, Shenyang 110004, P. R. China

Tóm tắt

This paper presents a new practical tuning method for fractional order proportional and integral (FO-PI) controller. The plant to be controlled is mainly first order plus delay time (FOPDT). The tuning is optimum in the sense that the load disturbance rejection is optimized yet with a constraint on the maximum or peak sensitivity. We generalized Ms constrained integral (MIGO) based controller tuning method to handle the FO-PI case, called F-MIGO, given the fractional order α. The F-MIGO method is then used to develop tuning rules for the FOPDT class of dynamic systems. The final developed tuning rules only apply the relative dead time τ of the FOPDT model to determine the best fractional order α and at the same time to determine the best FO-PI gains. Extensive simulation results are included to illustrate the simple yet practical nature of the developed new tuning rules. The tuning rule development procedure for FO-PI is not only valid for FOPDT but also applicable for other general class of plants.

Từ khóa


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Journal of Computational and Nonlinear Dynamics

Tập 3 Số 2

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