伺服驱动控制器的MTBF实用计算法

介绍了采用元器件计数预计法的伺服驱动控制的平均故障间隔时间(MTBF)实用计算方法。通过引用国内外公布的常用元器件通用失效率,对一款伺服驱动控制器的MTBF指标进行计算。方法简单方便,效果良好。

基于多CPU架构伺服驱动控制器的研究

论述伺服驱动控制器的实现方法,对ARM+FPGA+DSP架构的多CPU控制器进行具体分析,将其原理和优势展现出来;这种架构控制器系统分工明确,提高了算法的实时性、提高了控制器对外接口Ether CAT的实时性、提高了系统的稳定性。这种架构方案在本公司的伺服驱动器产品中进行了实验,现场的应用取得了良好的效果,体现出这种技术的现实意义。

永磁同步伺服电机监测与调试系统研究

在分析永磁同步伺服电机驱动监测与调试需求的基础上,设计系统的整体方案和其主要硬件电路包括串行口硬件连接电路和SPI接口与EEPROM通信存储电路。编制监测与调试系统和DSP之间的通信协议,开发系统中的通信、控制、数据采集和人机界面等功能模块。将开发的监测与调试系统和伺服驱动联机对设计的功能进行实验研究和测试,实验和测试结果表明系统功能满足伺服驱动系统调试和检测需要,方便伺服系统的现场调试工作。

Disturbance observer based position tracking of electro-hydraulic actuator

A nonlinear controller based on an extended second-order disturbance observer is presented to track desired position for an electro-hydraulic single-rod actuator in the presence of both external disturbances and parameter uncertainties. The proposed extended second-order disturbance observer deals with not only the external perturbations, but also parameter uncertainties which are commonly regarded as lumped disturbances in previous researches. Besides, the outer position tracking loop is designed with cylinder load pressure as output; and the inner pressure control loop provides the hydraulic actuator the characteristic of a force generator. The stability of the closed-loop system is provided based on Lyapunov theory. The performance of the controller is verified through simulations and experiments. The results demonstrate that the proposed nonlinear position tracking controller, together with the extended second-order disturbance observer, gives an excellent tracking performance in the presence of parameter uncertainties and external disturbance.

大庆石化仪表公司研制成功新型替代仪表

日前，由大庆石化总厂仪表公司研制成功的多功能信号变换器、液压驱动控制阀伺服控制器两项仪表新产品通过了大庆石化总厂技术发展部的专家鉴定。