基于免疫遗传PID的轮胎硫化温度控制的研究
发布时间：2018-07-28 19:33
【摘要】：硫化是轮胎进行加工的一道工艺,在众多工艺环节中,硫化是一个极其重要的阶段。其效果的是否达到工艺要求会直接影响到轮胎的实际使用性能。在硫化参数中,硫化介质温度最为重要,对其精确控制是硫化程度、硫化均匀度达到工艺要求的前提条件。本文以子午线轮胎的硫化过热水介质为研究对象,针对实际轮胎硫化过程中除氧加热装置生产的过热水温度波动、控制滞后造成的输水管道抖动、热水泵组故障和硫化效果欠佳等现象,分析了补水回水流量变化等因素对其的影响。简化除氧加热装置模型,并结合假设条件,以及传热规律和热平衡理论,建立硫化过热水温度控制系统的数学模型。本文在参考国内外研究现状的基础上,分析硫化过热水温度控制系统的特性,对于过热水温控系统这一非线性复杂控制对象,常规PID算法难以实现对过热水温度的精确控制,为了克服系统的不确定性和随机干扰,应用PID参数可变的变参数PID控制策略,引入非线性函数。整定的控制器参数只能对于特定的设定值变化具有较好的调节效果,为了使变参数PID控制取得更好的效果,本文采用人工免疫算法对该控制器进行优化设计。快速将系统优化的解收敛到小区间内的优点,优化具有较强抗干扰性的变参数PID。最后通过仿真对采用变参数PID免疫遗传算法与采用传统PID控制器和变参数PID控制器的硫化过热水温度控制系统控制性能进行比较。仿真结果表明,本文采用的变参数PID免疫遗传算法具有精度高、自适应性强、鲁棒性好的优点。
[Abstract]:Vulcanization is a process for tire processing, among which vulcanization is an extremely important stage. Whether the effect meets the process requirements will directly affect the actual performance of the tire. Among the vulcanization parameters, the temperature of vulcanization medium is the most important, and the accurate control of vulcanization degree is the precondition for the uniformity of vulcanization to meet the technological requirements. In this paper, the vulcanized overheated water medium of radial tire is taken as the research object. Aiming at the overhot water temperature fluctuation produced by the deoxygenation heating unit in the actual tire vulcanization process, the jitter of the water pipeline caused by the delay is controlled. The failure of hot water pump group and poor vulcanization effect were analyzed, and the influence of the change of rehydration and backwater flow rate on it was analyzed. The mathematical model of the temperature control system for vulcanized overheated water was established by simplifying the model of the deoxygenation heating device and combining with the hypothetical conditions, the heat transfer law and the theory of heat balance. In this paper, based on the research status at home and abroad, the characteristics of vulcanized overheated water temperature control system are analyzed. For this nonlinear and complex control object, the conventional PID algorithm is difficult to realize the accurate control of the over-hot water temperature. In order to overcome the uncertainty and random disturbance of the system, the variable parameter PID control strategy with variable PID parameters is applied to introduce the nonlinear function. The tuning parameters of the controller can only have a better effect on the change of the specific set value. In order to make the variable parameter PID control obtain better effect, the artificial immune algorithm is used to optimize the controller design in this paper. The system optimization has the advantages of converging the solution of the system optimization to the interval of the system and optimizing the variable parameter PIDs with strong anti-interference. Finally, the control performance of vulcanized overheated water temperature control system using variable parameter PID immune genetic algorithm and traditional PID controller and variable parameter PID controller is compared by simulation. The simulation results show that the variable parameter PID immune genetic algorithm has the advantages of high precision, strong self-adaptability and good robustness.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ336.1;TP273
本文编号：2151361
[Abstract]:Vulcanization is a process for tire processing, among which vulcanization is an extremely important stage. Whether the effect meets the process requirements will directly affect the actual performance of the tire. Among the vulcanization parameters, the temperature of vulcanization medium is the most important, and the accurate control of vulcanization degree is the precondition for the uniformity of vulcanization to meet the technological requirements. In this paper, the vulcanized overheated water medium of radial tire is taken as the research object. Aiming at the overhot water temperature fluctuation produced by the deoxygenation heating unit in the actual tire vulcanization process, the jitter of the water pipeline caused by the delay is controlled. The failure of hot water pump group and poor vulcanization effect were analyzed, and the influence of the change of rehydration and backwater flow rate on it was analyzed. The mathematical model of the temperature control system for vulcanized overheated water was established by simplifying the model of the deoxygenation heating device and combining with the hypothetical conditions, the heat transfer law and the theory of heat balance. In this paper, based on the research status at home and abroad, the characteristics of vulcanized overheated water temperature control system are analyzed. For this nonlinear and complex control object, the conventional PID algorithm is difficult to realize the accurate control of the over-hot water temperature. In order to overcome the uncertainty and random disturbance of the system, the variable parameter PID control strategy with variable PID parameters is applied to introduce the nonlinear function. The tuning parameters of the controller can only have a better effect on the change of the specific set value. In order to make the variable parameter PID control obtain better effect, the artificial immune algorithm is used to optimize the controller design in this paper. The system optimization has the advantages of converging the solution of the system optimization to the interval of the system and optimizing the variable parameter PIDs with strong anti-interference. Finally, the control performance of vulcanized overheated water temperature control system using variable parameter PID immune genetic algorithm and traditional PID controller and variable parameter PID controller is compared by simulation. The simulation results show that the variable parameter PID immune genetic algorithm has the advantages of high precision, strong self-adaptability and good robustness.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ336.1;TP273
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