基于积分分离SNPID的果蔬膨化温度控制系统设计

The design of integral separation SNPID in the fruit and vegetable puffing temperature control system

摘要:

在果蔬膨化温度闭环控制系统中,一般PID调节器参数难以根据环境变化实时自整定,无法实现对被控制对象的精确有效控制；此外,传统数字PID控制器在系统启动、停止或因加工不同果蔬原料而大幅增减温度设定值时,会因为PID控制器积分积累的影响,引起膨化温度控制系统超调增大,从而导致果蔬膨化温度控制系统相对稳定性降低。针对上述问题,提出了以SCL语言开发基于积分分离算法的单神经元PID控制器。将该积分分离SNPID控制器应用于果蔬膨化温度控制系统中,既能避免控制系统产生较大超调,又可通过调整权系数以增强控制系统的自适应能力,从而实现对果蔬膨化温度的精确有效控制。

Abstract:

In fruit and vegetable puffing temperature closed loop control system, it is difficult to achieve the effective and accurate control of the controlled object for the general PID controller because it cannot adjust the parameters itself according to the environment change. Besides, the traditional digital PID controller will take place larger overshoot because of the integral accumulation when the system starts, stops or temperature setting range changes largely, which will result in the decreasing of relative stability. Aiming to solving these problems, the essay puts forward adopting SCL to exploit the SNPID controller based on integral separation algorithm. The integral separation SNPID controller using in the fruit and vegetable puffing temperature control system can not only reduce the overshoot of control system but also can enhance the adaptive ability of the control system through the cumulative coefficient, realize the accurate temperature control in the process of fruit and vegetable puffing.