On the bases of theoretical research, a multilevel control system is developed, which is composed of industry control computer, PLC and high-quality periphery modules. The software system that based on the database technology is very safe and convenient.
在理论研究的基础上，研制出以工控机、PLC和高性能模块化外设构成的多级控制系统。
参考来源 - 中药生产提取工艺智能控制系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The multilevel control approach is a two-stage controller design.
多级控制是一种两步控制器设计方法。
A solution is given for the unstability caused by the wide system output for multilevel control of the force controller.
通过力控制器的分段调节，解决了由于系统输出变化范围太大而引起的不稳定性问题。
The multilevel control system bases on PLC and industry control computer, which is made up of high-quality periphery modules.
系统以工控机和PLC为中心，配以高性能的模块化外设组成一体化的计算机多级控制系统；
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