| Scraper conveyor is an important transportation tool when it is used to transport materialin some aspects,such as in coal mine, chemical mines, metal mines, power plant and soon.Also it is one of the keys of the fully mechanized equipment. It’s functions in thetransportation of coal,hang the coal face equipments like electric cables and waterpipes,also,it is the evolve supporting point of the hydraulicking support,and the orbits of coalmining machine etc.So whether it can be reliable, stable and efficient operation will have adirect and significant effect to the mine production benefits and economic benefits of the coalmine enterprises’.The paper according to the limitations of various monitoring methods which are adoptedin current home and abroad of scraper conveyor chain tension, combining with the specialenvironment of underground coal mine and scraper conveyor itself requirements, wedetermine to adopt the fuzzy adaptive PID control technology,and with the ACTS device thatthe American JOY company developed, to realize the scraper conveyor chain tensioncontrol.In it,we adopt the Mamdani method which belongs to the fuzzy control,and use theSIMULINK software package of MATLAB and the SIEMENS S7-300series PLC, combinedwith Step7, Win CC configuration software to go to simulate debug and verify.In this paper, the first thing I do is to introduce the research status and developmenttrends in domestic and overseas on scraper conveyor tension control, also the presentsituation and the development tendency of scraper conveyor, analyzes the limitation of thetraditional control method and put forward the technology superiority of fuzzy adaptive PIDcontrol,that is,it is not only use the fuzzy controller’s advantages in control flexibility, rapidity,strong adaptability and the advantages of using the PID controller’s high control accuracy,make their respective advantages complementary to each other, to realize the fullymechanized working face scraper conveyor chain tension automatic control system for a classof nonlinear system in good control.Secondly, it is the introduction to the fuzzy adaptive PID control technology, theanalysis and calculation of chain tension and the dynamics model is established of theautomatic control system. Thirdly, is the design of and implementation of algorithm. It is the important guaranteeof the scraper chain tension to realize good control. Among them, the essence of theparameters setting is to make the controller’s characteristics and the characteristics of theprocess match, so that the controlled object has a good dynamic and static performance, tomeet some performance index which reflect the quality of the control system.In the end,it is the system’s simulation、debugging and verification. Compare theconventional PID control with fuzzy self-tuning PID control of the simulation results in threeaspects,from the dynamic response performance, anti-interference performance to dynamictracking performance,so as to analyze. In order to validate the anti-interference ability offluctuation, in a certain preliminary tension value respectively applied to the system threewaves under the same amplitude and frequency, in the two kinds of control mode that is fuzzyPID control and conventional PID control for dynamic response performancecomparison.Using the SIEMENS S7-300series PLC, combined with Step7、Win CCconfiguration software etc, so that I can build control and test systems and carries on testingand validation for the unit step response as well as the data that actually collected. |
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