摘要
核电厂稳压器的压力控制系统具有非线性、时变性等特点。在分数阶理论的基础上提出分数阶PIλDμ控制算法(FOPID),实现了比例-积分-微分控制(PID控制)的由点到面的控制,同时引入短反馈算法,使控制更加精确。相较于传统PID控制多了2个参数的自由度,并采用一种间接算法(Oustaloup算法)实现其控制器的设计;并提出了一种生物启发式算法——鸡群算法(CSO),解决了分数阶PI~λD~μ参数的整定问题。为了避免局部最优和早熟现象,又提出了一种改进的CSO算法(ICSO),算法中更改了小鸡的位置更新公式,并引入混沌初始化和随机权重,提高算法的精度,从而获得全局最优。仿真结果表明:鸡群算法优化后的FOPID具有更加优良的性能指标和抗扰动能力。
The nuclear power plant pressurizer pressure control system has the characteristics of complex nonlinear and time-varying. On the basis of the theory of fractional order, fractional order PIλDμ controller is introduced on this kind of system, to realize the PID control from the point to the surface. Meanwhile, we introduced short feedback algorithm to achieve more precise control. A fractional order PIλDμ controller has 2 more degrees of freedom than the classical PID controller and a indirect algorithm （Oustaloup algorithm） was used to implement the fractional order controller. For the fractional-order PIλDμ controller parameter tuning, we introduced a biological heuristic algorithm-chicken swarm optimization algorithm （CSO）. Considering the problem that the original chicken swarm optimization algorithm easily falls into local optimum because of the premature convergence, an improved chicken swarm ptimization （ICSO） is proposed. In the algorithm, we changed the chick position update equation, and chaos initialization and random weighting were introduced to improve the accuracy of the algorithm, and to obtain the global optimal. The simulation results show that the FOPID with CSO algorithm has better performance and anti disturbance ability after optimization.
作者
赵明
叶建华
李晨晶
Zhao Ming Ye Jianhua Li Chenjing(Shanghai Key Laboratory of Power Station Automation Technology, Shanghai University of Electrical Power, Shanghai, 200090, Chin)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2017年第3期99-103,共5页
Nuclear Power Engineering
关键词
分数阶PIλDμ控制器
短反馈算法
Oustaloup算法
鸡群算法
Fractional order PIλDμ controller, Short feedback algorithm, Oustaloup algorithm, Chicken swarm optimization algorithm（CSO）
