The Development of Speed-Tension Type Three-motor Coordinate Synchronous Control Platform Based on Multi-microprocessor

Abstract

In order to improve the traditional speed-tension type three-motor synchronous control platform based on PLC bus control to further enhance the speed and control accuracy of the control system, enhance the control effect, Speed-Tension type Three-motor coordinate synchronous control platform based on Multi-microprocessor is proposed in this paper. In this platform, the complex programmable logic devices (CPLD), Digital Signal Processor (DSP) and microcontroller (MCU) are combined. In order to improve rapid and synchronization of the control system, CPLD Parallel nature is used to achieve three serial ports synchronous and concurrency control; Complex control algorithms are implement by the use of DSP fast and efficient data processing capabilities; Experimental results show: The control system is stable, at the same baud rate the control speed of the platform based on multi-microprocessor is more than three times faster than the one of the traditional PLC bus control platform. In the multi-microprocessor control platform, under the same control algorithm regulation time is more fast 0.53 seconds than traditional PLC control platform, the overshoot of the system is 13.53% of the one using traditional PLC control platform, and the tracking the maximum error reduces 60.53% than the one of the traditional PLC control platform. Introduction With the development of modern industrialization, the application of multi motor synchronous coordinated control is more and more widely, for example, in the textile, papermaking, printing and dyeing industry[1]. With the development of intelligent information technology, higher requirements have been put forward for real time control of multi motor synchronization control system. The traditional multi motor system is often uses bus polling control control, long period, poor real-time control, has been unable to meet the three motor and multi motor synchronous system requirements; The three motor synchronous control based on traditional PLC bus control is proposed in the [2-4]. Respectively on the system dynamic performance, steady state performance and decoupling performance are studied by experiment and analysis, control system is stable, but there are some overshoot, tracking steady error exists; The control platform of in this paper uses multi microprocessor as control core, using CPLD hardware synchronization control features, improve the adjustment time, reduce the overshoot To improve the tracking accuracy and decoupling performance of the system, so as to improve the control performance of the whole control system. Synchronous control scheme is proposed by the example of the speed tension type three motor synchronous control system adopting CPLD multi RS485 bus synchronization control mode. The real-time in equal communication baud rate control can be increased more than three times. So the new hardware control platform for the speed tension type three motor synchronous control system is developing. In this paper, we first introduce the framework of the overall design of the system, discussed the design of each sub module, for CPLD part by top-down modular design scheme [5]; Then the communication speed of the control platform and the traditional PLC bus control platform are compared with the test. In the hardware experiment control platform square wave tracking performance are tested using the first-order fuzzy immune active disturbance rejection control strategy, and the control effect on the traditional PLC bus control platform are analyzed and compared. 6th International Conference on Electronic, Mechanical, Information and Management (EMIM 2016) © 2016. The authors Published by Atlantis Press 1001 Platform Overall Design The system is composed of CPLD control module, DSP control module and so on. System structure diagram is shown in Fig. 1. DSP control CPLD control