基于DSP快速原型的淀粉生产线串级控制系统

Application of Cascade Control System in Starch Production-line Based on Rapid Prototyping of DSP

在分析比较传统PID和Smith预估PID作为串级控制主回路控制器的基础上,提出了主回路采用Smith预估PID,副回路采用传统PID的串级控制策略调节淀粉生产线中的浓度。对淀粉生产线中串级控制闭环回路进行数学建模,并对主回路采用Smith预估PID和传统PID两种控制方案进行了设计与仿真。仿真结果表明,主回路采用Smith预估PID在控制效果上明显优于传统PID并且其鲁棒性优于传统PID。利用快速原型控制系统实现了该方案,利用Matlab/Simulink建立淀粉生产线的控制系统模块,在CCS集成开发环境中自动生成代码,然后将可执行代码下载到DSP TMS320C2812和TMS320C6713中,即可实现淀粉生产线的串级控制系统设计。

Cascade control PID was used to adjust the density of the starch production-line. After analyzing and comparing the principle of traditional PID and Smith prediction PID, a mathematical model about cascade control loop of starch production-line was proposed. Then, these two controllers and their outer loop controller were designed and simulated by using tradition PID and Smith prediction PID respectively. The simulation results show that the cascade control system with Smith prediction PID on its outer loop is better than traditional PID. In the end, the implementation of a rapid prototyping control system was presented, which involves the design of DSP algorithms by using Matlab/Simulink blocksets to setup the Simulink module of the starch production-line, automated code generation in the CCS integrated development environment, and downloading of executable code to the Texas Instruments＇ TMS320C2812 and TMS320C6713.