基于plc的張力控制系統(tǒng)的發(fā)展(英文翻譯)-在線瀏覽
2025-01-05 08:14本頁面
【正文】 angle of the small gear is given as φ = iθ For the potentiometer, where U is the output voltage of rotary potentiometer, US is the power supply voltage of rotary potentiometer, and φs is the total angle of rotary potentiometer. Trimmed as 4 Software Development of the System The software development makes full use of the capabilities of FP0C10RS, the digitalanalogy I/O modules, the hardware and software resources of the PC precision of the analogdigital or digital analog conversion depends on the number of bits of the analogdigital converter and digitalanalog converter. FP0A80 and FP0A04V both are 12 bits, and the resolution is 1/4 000 when the output and input range –10V+10V, while the FP0 is 16 bits, so the control resolution of the system can be assured. The operation speed of each basic instruction is μs/step, thus 500 steps program needs only ms, and the conversion speeds of FP0A80 and the FP0A40V both are 1 ms/channel, so the control speed of the system is assured. The PLC ladder diagram is applied to develop the whole control program. However, the input of the parameters is not intuitionistic, neither is the display of the realtime tension and the scroll radius. In order to solve this problem, a control program is developed for the host puter on the interface of which the operator can perform the input of the parameter and the display of the realtime tension, the speed and the scroll radius. The programming port of all the FP PLC’s support OPEN MEWTOCOL PROTOCOL. Upper puter sends a COMMAND to PLC as an ASCLL string. Then the PLC automatically returns the RESPONSE based on the COMMAND. The inputs of the system are the voltage feedback by radius following device, the torque feedback of alternating numeric servoelectromotor and the velocity feedback. The output of the system are alternating numeric servoelectromotor torque and velocity voltage. The software control flow of the tension control system is shown in . 5 Simulation and Experimental Results Experimental research of the tension control in real winding states was carried out through simulating the real working circumstances to test the feasibility and control precision. When the tension was set to 10 N, the constanttension curve under simulation and experimental conditions can be acquired with a near constant tension, as shown in and , respectively. In order to know the work state of the AC servo motor when the tension changes, the tension force was changed from 5 N to 10 N and the variation curves of which are shown in and under simulation and experimental conditions, where the overshooting and fluctuation are rather small and the response time is less than s. Analysis of static difference rate Static difference rate is a very important indexfor evaluating the performance of the system. It can be expressed as follows where ΔT = Tmax ?Tmin ,Tmax is the maximum tension, Tmin is the minimum tension, and Tm is the average tension. The analysis of static difference rate of tension is shown in Table 1. Table 1 The analysis of static difference rate of
公司管理相關(guān)推薦
鄂ICP備17016276號-1