Research On Key Parameter Measurement And Synchronization Of Large Rotary Dual-Motor Driving System

As a large rotary equipment which has dual drive at both ends, car dumper is an important material transport equipment which is necessary in electric power, chemical industry, metallurgy and port etc. It has characteristics such as large structure, heavy duty, low frequency operation, stop-and-go and recurrent excursion of machine barycentre. During working process, such mechanical failure as teeth breakdown of transmission system and plastic deformation of load flat appears frequently, which result in the break of production, even the paralysis of whole product line, so tremendous economic loss is inevitable for corporations. Therefore, researches on car dumper, especially key parameter measurement and synchronization control of dual drive triple-car dumper have become hot subjects in large machinery manufacturing and measurement control field.This paper starts with machine structure, loading mode and operating principle of dual drive triple-car dumper, utilizes interrelated theory and method of mathematics, mechanics, dynamics and advanced measurement control, analyzes its dynamic working characteristic, researches measurement method of key parameters and implementation of synchronization control.By application of coordinate conversion and computer graph software, moment dynamic distribution during whole tumbling process is researched and dead-load moment equation of transmission system is deduced. By using fluidity rotary inertia theory, fluidity time-varying performance during dumping is analyzed and dynamic torque mathematical model is established, which provide basis for optimization control of dumping progress.A new torque measurement method based on correlation phase and generalized forecast soft measurement difference frequency tracing is presented to realize time-varying tracing of sampling frequency and measured signal, which solves such interference effectively as frequency time-varying during the system operation, uneven distribution of material, elasticity fluctuation of load flat and untight coupling between flat and bodywork, so measure accuracy of torque is improved. The teeth breakdown of transmission system and plastic deformation of load flat of car dumper is researched. The conclusion and argument about above phenomena caused by inconsistency of dual drive is given. Self adapting flexible drive is introduced into the final stage of transmission system. The abrasion of big gear ring is transformed fully to roller wheel based on the abrasion transfer principle. The conception and means of coarse adjustment and delicate adjustment is imported to guarantee exactitude engagement of pinion wheel and big gear ring, which minimize the occurrence of teeth breakdown and deformation. The scheme of roller abrasion and gear mesh measurement is put forward to achieve automation compensation of system driving precision.Real-time and rapidity of generalized predictive control is researched and a dual drive synchronization control system of car dumper based on generalized predictive control is designed. A fuzzy controller is added between two channels of dual drive subsystem. Based on coordinated control principle and achieving the goal of difference minimum of corresponding state of two subsystem, a fuzzy correction control program using in-phase error non-uniform common feedback is adopted to make the output of two synchronous subsystem consistent basically, which increase response speed of system to synchronous error, reduce synchronous error of dual drive subsystems effectively, ensure the consistency of car dumper dual drive, solve the recurrent mechanical failure caused by inconsistency of dual drive and enhance the steady reliable operation of car dumpers. The synchronization control strategy presented by this paper provides favorable guarantee for synchronization precision of multi subsystem in large rotary equipments and at the same time explores new ideas for other synchronization control systems.