变论域模糊PID在无头轧制模拟实验台上的研究

Study on the Platform of the Endless Rolling System of Variable Universe Fuzzy PID

无头轧制技术作为目前轧钢业最为先进的加工方法,对未来我国轧钢业的发展有深远意义。无头轧制系统是强扰动作用下的高阶、非线性、强耦合、时变的机电控制系统,要求后一根钢坯能够快速、准确、稳定地追上前一根钢坯。针对传统PID控制器响应速度慢、稳定性差和常规模糊PID论域不变调节能力差的缺点,将变论域与常规模糊PID结合提出变论域自适应模糊PID控制器,其变论域能够提高模糊推理的精度,模糊控制能够实现PID参数的在线整定。通过仿真和实验表明,其响应速度、稳态精度和抗干扰能力优于传统PID和常规模糊PID,具有一定的推广价值。

As the most advanced processing method in current steel rolling industry,endless rolling technologyhas far-reaching significance for the development of steel rolling industry. Endless rolling system is a higher order,non-linear,strong coupling,time-varying electromechanical control system under strong disturbance. It needs thesecond steel billet catches up with the first one quickly,accurately and stablely. The traditional PID controller has theslow response and poor stability,while the constant universe of conventional fuzzy PID leads to its poor controlcapability. Combined with variable universe and conventional fuzzy PID to propose variable universe adaptive fuzzyPID controller,which variable universe could improve the accuracy of fuzzy control and fuzzy control could achievePID parameters tuning online. The simulation and experimental results show that its response speed stability accuracy,disturbance rejection ability are better than traditional PID and conventional fuzzy PID,it is valuable to use andpopularize.