调节阀塞 meaning in English

control valve plug

And pid control system was designed and implemented on the base of the control object modeling , which was considered to work well in most cases , after debugging , testing and running in the field , except some key drawbacks including weak robustness and lack of solution for the coagulation on the valve
在系统试运行一段时间后发现， pid控制策略能够满足多数情况下的控制要求，尤其是在系统的扰动不太大的时候，但是也存在一些关键性的不足，主要是鲁棒性不够和调节阀塞棒挂渣问题没有好的解决方案。