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Research On Loader Intelligent Control System

Posted on:2009-04-06Degree:MasterType:Thesis
Country:ChinaCandidate:H Y LiFull Text:PDF
GTID:2132360308479855Subject:Mechanical design and theory
Abstract/Summary:PDF Full Text Request
At present, the loader is faced with the reform of manipulation and control, electronic, automation, robots is the development direction of upgrading loader. The development of China's loader must merge with the world, in order to enhance the country's loader all over the word. We must speed up the loader and intelligent robot research.In this paper, from the idea of intelligent robot, a robot-loader on the control of small quoted Shi Bo, and others made of behavior-based control methods. This control method can meet loader complex work environment. And the realization of this control method to improve the process, that is, using several parallel neural network substitute for a multiple-input multiple-output neural network, improve training accuracy and computational speed. This paper also mentioned in the text of a fuzzy control method MATLAB simulation. After the selected control method, and then to transform the loader, making the loader can be modified to adapt to the new control method. Transformation as follows:(1) Working equipment and the hydraulic systemLoader installed on the work of the establishment of kinematics and dynamics model of a working device characteristics of the movement, and VC++ language application prepared loader kinematics simulation graphics. Hydraulic System installation work is the transformation of high-speed switching solenoid valve applications. In this paper, according to the results of previous studies using high-speed switching solenoid valve as a pilot valve control valve spool multiple displacement, the ultimate control of the telescopic hydraulic cylinder. To the transformation of the hydraulic system is based on this method.(2)The transmission systemFirst, on the transmission system are introduced, and then the automatic transmission gearbox shift of research. This is the first proposed based on neural networks shift of the five parameters. In order to improve transmission quality by using digital switching solenoid valve control access to the hydraulic clutch gearbox.(3) The throttle control systemOn the market, throttle control system is expensive, According to the special control requirements loader, made by PLC, stepping motor, clutch, accelerator pedal and the throttle angle sensor opening control system.(4) Based on S7-PLC series of high-speed switching solenoid valve control study The use of PLC models, such as the high-speed input-output function and composition PID closed-loop control system, high-speed switching solenoid valve control population pressure and flow control, ultimately controlled hydraulic cylinder elongation. The article takes the control of a hydraulic cylinder introduced as an example.In this paper, absorb and use a large number of research results on the loader, portfolio optimization, and a lot of their views. It is good for the development of the intelligent robot loader.
Keywords/Search Tags:Wheel loaders, electro-hydraulic proportional control, automatic transmission gearbox, throttle opening control, neural networks, PLC
PDF Full Text Request
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