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Based on Generalized Predictive Control Forming Machine Temperature Control System

Author: SuZhongQuan
Tutor: LiangXiMing；LuWuYi
School: Central South University
Course: Control Theory and Control Engineering
Keywords: Blister machine SCM Generalized Predictive Control Temperature Control
CLC: TP273.5
Type: Master's thesis
Year: 2005
Downloads: 273
Quote: 3
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Abstract


With LSI technology, the development of VLSI technology, especially the emergence and widespread application of microprocessors, packaging machinery control technology with rapid development. Control technologies for promoting the development of packaging machinery functions of the important driving force. Late development of China's packaging machinery, automation infrastructure is poor, and in the packaging machinery control field larger than the gap of foreign advanced technology, making the development of China's packaging machinery can only be in the middle and low level. Control technology behind domestic packaging machinery has an impact on quality features to further improve the bottleneck. Therefore, the development of high-grade packaging machinery control system to improve the level of automation in packaging machinery is a very urgent task. This article first analyzes the temperature control system of plastic machine control objectives, to design a microcontroller as the core, the temperature sensor, A / D converter, amplifier, multi-way switch, hardware watchdog and touch screen as the main component of the hardware circuit . On the basis of the hardware circuit for the control system software design. For plastic machine temperature control characteristics of the object, this paper uses generalized predictive control algorithm control. Generalized Predictive Control is a model-based control algorithm, developed in the 1970s a new type of control algorithm, which overcomes the modern control theory in the industrial production process many difficulties in the industrial process shows great charm. The reason is the basic principle for complex industrial environments with strong adaptability. Algorithm, the paper first introduces the basic generalized predictive control algorithms. Generalized predictive control algorithm to control the basic effect is very good, but need to be online matrix inversion. Online calculation is too big drawback, making it difficult to achieve in the microcontroller. Taking into account the transfer function of the controlled object characteristics and controller microcontroller core, this paper studies three improved generalized predictive control algorithm. (1) with PID structure generalized predictive control algorithm; This algorithm uses the idea of ??derivation of generalized predictive controller with PID algorithm for each parameter and easy parameters tuning and robustness characteristics; (2) Direct generalized predictive control algorithm; This algorithm uses a direct derivation of the control law, which significantly reduces the microcontroller line computation. (3) Improved Generalized Predictive Control Algorithm; This generalized predictive control algorithm to improve the direct object of the algorithm requires accurate step response shortcomings. Simulation results show that these algorithms are suitable for plastic machine's temperature control system.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Computer control, computer control system
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