scholarly journals Rotation Speed Control of the Rotary Valve in MWD Tools Based on Speed Feedforward Compensation

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Lingtan Zhang ◽  
Yue Shen ◽  
Long Wang ◽  
Jia Jia ◽  
Lingzhi Wei
Keyword(s):  
Pid Control ◽  
Flow Measurement ◽  
Closed Loop ◽  
Drilling Fluid ◽  
Fluid Pressure ◽  
Speed Control ◽  
Calculation Model ◽  
Control Voltage ◽  
Rotary Valve ◽  
Load Torque

The rotary valve speed control, seriously affected by the nonlinear characteristic of rotary valve load torque, affects the generation of drilling fluid pressure phase shift keying (PSK) signal and its quality. The calculation model feedforward of the load torque acts on the speed control system and enables the motor voltage to change according to the law of calculation model, and the linearization correction of the speed system is performed. Additionally, the flow measurement is introduced into the calculation model of the load torque to track the load torque change with the flow, suppressing the influence of large changes in flow rate on open-loop control of rotary valve speed. The closed-loop proportional-integral-derivative (PID) control is formed by negative feedback of speed, and the PID parameter value rule is established based on the rapid decay control of transient component in the rotary valve speed step response, which speeds up the tracking of the rotary valve speed following the control voltage pulse and reduces the distortion of the drilling fluid pressure PSK signal, increasing the frequency of the drilling fluid pressure carrier and improving the transmission rate of downhole information. Simulink simulation indicates that the closed-loop PID control of rotary valve speed can track the change of control voltage pulse quickly and strongly suppress the interference influences from flow measurement error and load torque calculation model deviation.

Design and Simulation of Fuzzy-PID DC Governor System Based on Mine Hoist

2013 ◽  
Vol 341-342 ◽  
pp. 834-838
Author(s):  
Yan Xiang Wu ◽  
Chao Jun Zhang ◽  
Hai Bo Huo ◽  
Chao Qun Zhou
Keyword(s):  
Control System ◽  
Pid Control ◽  
Closed Loop ◽  
Speed Control ◽  
Fuzzy Pid ◽  
Matlab Simulink ◽  
Control Scheme ◽  
Speed Control System ◽  
Mine Hoist

According to the requirement of smooth operation and accurate positioning for DC speed regulating system of mine hoist, a new speed control system that based on double closed-loop of Fuzzy-PID was designed. The best control scheme for mine hoist was also validated by simulation comparison with conventional PID control system in the MATLAB/Simulink. The result showed that the proposal was feasible and had practical value.

scholarly journals Load torque analysis and compensation device design for low power drilling fluid continuous wave generator

2021 ◽  
Vol 11 (5) ◽  
pp. 2145-2156
Author(s):  
Jiafeng Wu ◽  
Jianming Jiang ◽  
Botao Zhou ◽  
Shuxing Zhao ◽  
Ning Han ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Continuous Wave ◽  
Drilling Fluid ◽  
Compensation Method ◽  
Rotary Valve ◽  
Load Torque ◽  
Load Compensation ◽  
Wave Generator ◽  
Compensation Device

AbstractAs an advanced downhole instrument in drilling engineering, drilling fluid continuous wave generator (DFCWG) has great application prospects. The large load torque is one of the key problems that hinder the development of DFCWG. In this paper, based on the design theory of rotary valve and finite element method, the structure of rotary valve is designed and the load torque characteristics is analyzed and points out that the load torque has strong alternating characteristics. It is pointed out that the load torque has the characteristics of strong alternating. According to the characteristics of the load torque, the "fluid-magnetic" collaborative compensation method is proposed. The load compensation turbine and magnetic compensation device are used to compensate the DC and AC components of the load torque respectively, and the load compensation device is designed. The rationality of the design of the load compensation device is verified by simulation. Finally, the comprehensive compensation effect is analyzed by the finite element method. According to the analysis results, the "fluid-magnetic" collaborative compensation method can effectively reduce the load torque. The research results can provide technical support for DFCWG design.

scholarly journals Perancangan Sistem Kontrol Kecepatan Motor DC Dengan PID Labview 2010

2019 ◽  
Vol 9 (02) ◽  
pp. 23-32
Author(s):  
Fauzy Fauzy ◽  
Sugiatmo Kasmungin
Keyword(s):  
Control System ◽  
Steady State ◽  
Pid Control ◽  
Closed Loop ◽  
Speed Control ◽  
Dc Motor ◽  
Loop System ◽  
Motor Speed ◽  
Closed Loop System ◽  
The Stability

The stability of the system is the main objective for Control System Design criteria. PID control with closed loop system is the one of control which can improve the stability of the system from disturbance effect. In this study, DC Motor Speed Control is designed with PID LabVIEW 2010 Software and Proximity Sensor as a closed loop feedback. The system allows the operator to control speed of DC Motor from LabVIEW front panel which automatically stabilized when load �which usually slow down the speed of DC Motor, applied. PID LabVIEW 2010 generates voltage output 0-5Vdc and drives DC Motor through analog output channel from NIDAQ 600, which received by Non-Inverting Amplifier and amplified to 0-12Vdc output. PID Control with Closed Loop system may dampen the speed response second order of DC Motor to have value of overshoot number � 0 with steady state error of �2%. The system feedback can stabilize this condition from outside interference. The result of this speed control system has success criteria of overshoot (Mp) = 0 and Error Steady State (Ess) = 0.82%.

Pressing speed stability control of a special ceramic roller bearing press based on fuzzy adaptive PID

2021 ◽  
pp. 1-16
Author(s):  
Lijie Yang ◽  
Guimei Wang ◽  
Huadong Zhang ◽  
Jiehui Liu ◽  
Yachun Zhang
Keyword(s):  
Pid Control ◽  
Simulation Analysis ◽  
Roller Bearing ◽  
Speed Control ◽  
Stability Control ◽  
Interference Signal ◽  
Ceramic Roller ◽  
Speed Stability ◽  
Adaptive Pid Control ◽  
Fuzzy Adaptive

A special ceramic roller bearing press (SCRBP) is developed to press two bearings efficiently and precisely at the same time. A speed control mathematical model of the bearing press is built to obtain stability bearing pressing speed. The fuzzy adaptive PID controller of the bearing pressing speed of SCRBP is designed. The simulation model is also built. Fuzzy adaptive PID control is compared with conventional PID control. By simulation analysis, the simulation results show that adjusting time of fuzzy adaptive PID control is short, and its overshoot is very small, almost coincides with the set pressing speed. Moreover, fuzzy adaptive PID is suitable for the pressing speed control of the bearing pressing speed system with step interference signal. The pressing stability speed is obtained by fuzzy adaptive PID control.

Implementation of motor speed control using PID control in programmable logic controller

2012 ◽  
Author(s):  
R. E. Samin ◽  
N. A. Azmi ◽  
M. A. Ahmad ◽  
M. R. Ghazali ◽  
M. A. Zawawi
Keyword(s):  
Pid Control ◽  
Speed Control ◽  
Programmable Logic Controller ◽  
Programmable Logic ◽  
Motor Speed

Digital DC Speed Control System in Mine Hoist Application

2011 ◽  
Vol 219-220 ◽  
pp. 1017-1021
Author(s):  
Rui He ◽  
Yun Ping Ge
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Speed Control ◽  
Closed Loop System ◽  
Pi Regulator ◽  
Control Precision ◽  
Speed Control System ◽  
Digital Trigger ◽  
Mine Hoist ◽  
Work Stability

Mine hoist shoulder important transport tasks. Through the analysis of the main circuit of mine hoist, this paper studies out ASCS digital DC speed control system whose core is microprocessor and whose hardware part constitutes digital trigger and double closed loop system. The software part not only achieves the system's digital PI regulator, logic switching, digital trigger phase shift, pulse channel selection and pulse width setting, but also realizes the systematic detection, monitoring, fault diagnosis, which improves the control precision and work stability of the system.

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