电动机拖动的启闭机荷重开度检测系统研究

发布时间：2018-04-03 03:36

本文选题：启闭机　切入点：荷重开度　出处：《农业机械学报》2017年01期

【摘要】：荷重开度一体式传感器安装在电动机输出轴与启闭机的动力输入轴之间,可以输出包括启闭机实际负载引起的总力矩及用于开度检测的计数脉冲等电信号,同时起到联轴器的作用。通过次级旋转的变压器耦合及光电耦合方法分别实现了传感器内部旋转电路的供电及总力矩与开度脉冲等电信号的非接触传输。为了从一体式传感器输出的总力矩信号中获取启闭机的实际负载,荷重检测分为2个阶段,首先利用灰色关联校正环节对传感器内部弹性轴所受总力矩对应的模数转换(ADC)输出值进行校正,将获得的趋于稳定的ADC校正值作为第1阶段实际输出值,并将该输出值作为输入变量,在第2阶段,分别利用最小二乘支持向量回归(LS-SVR)和偏最小二乘回归(PLSR)方法实现对启闭机负载的回归预测,再通过灰色关联校正环节对该负载预测值进行校正得到最终的启闭机实际负载。试验结果表明,结合灰色关联校正方法,采用LS-SVR的启闭机实际负载回归误差在±0.6%范围内,利用PLSR的启闭机负载回归误差在±1%范围内。同时,由于荷重开度一体式传感器与电动机输出轴直接连接,在启闭机升降过程中,输出的开度计数脉冲数增加,提高了开度检测分辨率,实际开度分辨率远小于1 mm。
[Abstract]:An integrated load opening sensor is installed between the motor output shaft and the power input shaft of the hoist, which can output electrical signals including the total torque caused by the actual load of the hoist and the count pulse used for opening detection.At the same time play the role of coupling.The power supply of the internal rotation circuit and the non-contact transmission of the total torque and opening pulse signals are realized by the secondary rotation transformer coupling and optoelectronic coupling method respectively.In order to obtain the actual load of the hoist from the total torque signal output from the integrated sensor, the load detection is divided into two stages.First, the output value of A / D converter corresponding to the total torque of the elastic axis inside the sensor is corrected by using the grey correlation correction link, and the stable ADC correction value is taken as the actual output value in the first stage.In the second stage, the least square support vector regression (LS-SVR) and the partial least squares regression (PLSRR) are used to predict the load of the hoist.Finally, the actual load of the hoist is obtained by correcting the predicted value of the load by grey correlation correction.The experimental results show that the actual load regression error of LS-SVR is within 卤0.6%, and that of PLSR is 卤1%.At the same time, due to the direct connection between the load opening integrated sensor and the output shaft of the motor, the number of open count pulses is increased during the hoisting process of the hoist, and the resolution of opening detection is improved, and the actual opening resolution is far less than 1 mm.
【作者单位】：蚌埠学院电子与电气工程学院;南京理工大学机械工程学院;
【基金】：国家自然科学基金项目(51175267、51575281) 安徽省高等学校省级自然科学重点基金项目(KJ20160A452、KJ2013Z193)
【分类号】：TH823;TP212

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