摘要
可编程控制器(PLC)因其高可靠性、高性价比被应用于光电编码器测速,然而基于PLC的传统测速算法在低速段响应速度较慢,且精度只在一定狭窄转速范围内可控,而在宽速度范围则波动较大。针对上述问题,该文提出一种单脉冲测速算法,该算法采用PLC高速脉冲发生器作为时钟脉冲,在全速度范围内速度精度稳定。同时该算法依据精度需要限定测速算法周期,实现编码器实时更新,以达到精度和响应速度的适配。仿真分析表明,该算法在0~1700 r/min的常用宽速度范围均具有良好的精度和速度响应,在测速系统中具有一定的应用前景。
Programmable logic controllers(PLC)due to their high reliability and cost-effectiveness,can be implemented in photoelectric encoders for speed measurement.However,traditional speed measurement algorithms based on PLC tend to have slower response speeds at low speeds range,and the controllable accuracy is limited within a narrow rotation speed range,resulting in significant fluctuations across a wide speed range.To address the above-mentioned issues,a single-pulse speed measurement algorithm is proposed.This algorithm utilizes a high-speed pulse,ensuring stable speed accuracy across the entire speed range.Simultaneously,the algorithm specifies the speed measurement cycle based on accuracy requirements,allowing real-time updates of the encoder to achieve a balance between precision and response speed.Simulation analysis indicates that this algorithm exhibits favorable accuracy and speed response within the commonly used wide speed range 0~1700 r/min,showcasing potential application prospects in speed measurement systems.
作者
吴有恒
鹿麟
WU Youheng;LU Lin(No.38 Institution of CETC,Hefei 230088,China)
出处
《自动化与仪表》
2024年第5期157-161,共5页
Automation & Instrumentation
关键词
测速算法
可编程控制器
高速脉冲输出
相对误差
speed measurement algorithm
programmable logic controllers(PLC)
high-speed pulse output
relative error
