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Level of the quality of the asphalt pavement , is closely related to the use of performance quality and performance of asphalt mixture of raw materials , mix gradation and construction control factors , including the control of the production mix is an important factor affecting the asphalt mixture production mix of factors in addition to the stirring device structure , the most important is the accuracy of the weighing of the weighing system , the speed control. Asphalt mixing plant aggregate weighing system is an important issue , has a practical significance . In this paper, based on the research of asphalt mixing equipment Aggregate weighing system structure and working principle of the control of the speed and accuracy of the weighing of the weighing system . The weighing system is nonlinear transient system , the system is equivalent to the second-order system , derived a mathematical model of the weighing process , into a dynamic weighing issues . Experimental analysis of the system , draw the output of the system is an oscillation process , so the correction system . General correction method does not apply to the system , tracking compensation , dynamic correction of the weighing system in the weighing process , always keep the best of the second-order system , and come to the real signal . Problems exist for general mixing equipment weighing system , on the basis of the analysis of the theory of fuzzy control and PID control , fuzzy control and PID control strategy introduced in the weighing system . And PID parameters self - adjusting fuzzy controller weighing system made ??some exploration , through MATLAB simulation software to design a fuzzy controller . The entire weighing system using MATLAB simulation software simulation, PID control system simulation and PID parameters self-tuning fuzzy control system simulation comparison , draw system , PID parameters self-tuning fuzzy control can improve the dynamic characteristics of the system and stable performance , using this method can effectively control the double solenoid valve , thereby greatly improving the accuracy of the weighing of the weighing system .
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