基于电液比例技术的恒速度数字控制器设计

DESIGN OF CONSTANT SPEED DIGITAL CONTROLLER BASED ON ELECTRO-HYDRAULIC PROPORTION TECHNIQE

石油测井新型绞车采用电液比例阀调节绞车滚筒的角速度。测井过程中,滚筒工作半径不断变化,电缆的线速度也不断交化。为保证恒速测井,要求不断进行人工调整,工作强度大,速度输出一致性差。对绞车的工作特性进行分析,采用大林算法,设计了一种恒速度数字控制器,给出了控制模型和数学公式。所设计的数字控制系统的速度稳定性满足测井工作需要,降低了劳动强度,是一种具有较高性价比的应用方案。

The electro-hydraulic proportion valve is used in the novel hoist for well logging to regulate the angular speed of the roller. The rolling radius is changing during well logging, and the line speed is also changing continuously. In order to keep the line speed constant, the angular speed should be regulated manually which is a heavy work, and also the output consistency is not satisfactory. Analyzing the characteristic of the hoist, a kind of digital controller of constant speed is designed using Dahlin arithmetic ,the model and formulas are presented. The stability of line speed in the designed digital control system keeps in good accord with the requirements of local well logging, the workload is decreased also, and it is a good application with higher quality and lower cost.