SIA OpenIR  > 信息服务与智能控制技术研究室
Alternative TitleAnalysis and Application of Model Predictive Control Based on Two-layer Structure
Thesis Advisor于海斌 ; 邹涛
Keyword模型预测控制 双层结构预测控制 快速预测控制 分壁精馏塔 定制化设计 病态模型
Call NumberTP273/P18/2015
Degree Discipline机械电子工程
Degree Name博士
Degree Grantor中国科学院沈阳自动化研究所
Place of Conferral沈阳
Other AbstractBased on the steady-state inputs and outputs of multivariable two-layered MPC system, if for a class of multivariable coupled plants that is assumed the open-loop stable the economic objective function can be expressed as a linear relationship, the optimal incremental of control inputs can be directly obtained through the one-step calculation by our approach, therefore a lot of time to solve large-scale matrix computing and mathematical programming in traditional MPC are saved. Also by decomposing the optimal algorithm into two parts, that is offline calculation and online update, and further combining the offline tabulate storage and online look-up update, which making on-time numerical optimization time cost very small, so it can meet real-time requirements of high-speed object control. The dividing wall distillation column (DWC) has potential to reduce one third energy consumption compared to the conventional distillation columns in terms of thermodynamic calculations, however, DWC is still unable to become the standard design of chemical industry since the inherent behavior understanding of heat and mass transfer kinetics is not clear and the technical support of reliable control and operation is not enough, which large-scale applications of DWC are limited by above main factors. For multivariable MPC system design of DWC, the strategy integrated control and optimal operation based on fast MPC, is suggested to achieve smooth switching in different operating target. Our contributions will support these new high-efficient separation equipment to realize the desired optimal operation. With the continuous improvement of process equipment, DWC will be promoted to large-scale industrial applications. Many industrial plant models can be expressed as the transfer function of a first order lag plus delay or second order lag plus delay, which is called process model. In fact, many models can be identified by different combinations of gain and time constants and delay. Optimal response characteristics of closed loop control based on these model parameters can generally inferred by field engineers. Especially when the expected closed-loop response is given, the analytical expression of predictive control can be obtained directly, thus online calculation without iterative is extremely fast. Based on such a fast predictive control algorithm and with the rapid development of embedded microcontroller hardware and software technologies, the implementation of optimal control law based on custom-made for the controlled plant is possible. Such customized control design has significant advantages in reliability, operation and maintenance. It is an important direction for future advanced control technology development and applications. An integrated platform supporting the design, simulation, implement of fast MPC systems is developed. Such our customized control system is successfully applied to control the level of a pilot-scale two tank.
Contribution Rank1
Document Type学位论文
Recommended Citation
GB/T 7714
潘昊. 基于双层结构的预测控制系统分析与应用[D]. 沈阳. 中国科学院沈阳自动化研究所,2015.
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