Liu Lu, Pan Feng, Xue Dingyu
Northeastern University, College of Information Science and Engineering, Shenyang 110819, PR China.
Northeastern University, College of Information Science and Engineering, Shenyang 110819, PR China.
ISA Trans. 2015 Mar;55:227-33. doi: 10.1016/j.isatra.2014.09.012. Epub 2014 Oct 29.
In this paper, a new tuning method of variable-order fractional fuzzy PID controller (VOFFLC) is proposed for a class of fractional-order and integer-order control plants. Fuzzy logic control (FLC) could easily deal with parameter variations of control system, but the fractional-order parameters are unable to change through this way and it has confined the effectiveness of FLC. Therefore, an attempt is made in this paper to allow all the five parameters of fractional-order PID controller vary along with the transformation of system structure as the outputs of FLC, and the influence of fractional orders λ and μ on control systems has been investigated to make the fuzzy rules for VOFFLC. Four simulation results of different plants are shown to verify the availability of the proposed control strategy.
本文针对一类分数阶和整数阶控制对象，提出了一种变阶分数模糊PID控制器（VOFFLC）的新整定方法。模糊逻辑控制（FLC）能够轻松应对控制系统的参数变化，但分数阶参数无法通过这种方式改变，这限制了FLC的有效性。因此，本文尝试让分数阶PID控制器的所有五个参数作为FLC的输出，随着系统结构的变化而变化，并研究了分数阶λ和μ对控制系统的影响，以制定VOFFLC的模糊规则。给出了不同对象的四个仿真结果，以验证所提控制策略的有效性。
