A Synchronous Control Strategy for Dual-drive Feed Mechanism Considering the Change of Workbench’s Gravity Center

2021 ◽  
Author(s):  
Fengting Guo ◽  
Hong Lu ◽  
Bin Zhou ◽  
Qi Liu ◽  
Jiafu Xue ◽  
...  
Keyword(s):  
Control Strategy ◽  
Gravity Center ◽  
Synchronous Control

The Simulation Research of Synchronization Control Based on the Virtual Shaft Control and the Relative Coupling Control

2014 ◽  
Vol 1049-1050 ◽  
pp. 1111-1115 ◽  
Author(s):  
Huan Huan Shi ◽  
Xiao Wu ◽  
Liang Hua ◽  
Hong Gang Ji
Keyword(s):  
Control System ◽  
High Precision ◽  
Control Strategy ◽  
External Disturbance ◽  
Parameter Variation ◽  
Synchronization Control ◽  
Simulation Research ◽  
Synchronous Control ◽  
Synchronization Scheme ◽  
Main Spindle

Although the traditional synchronous control system for the virtual shaft has met the accuracy requirements of most products, it still can not fully meet the requirements, for the high precision, high synchronization control. This article proposed multi-motor synchronous control strategy based on the relative coupling control combined with virtual main spindle control, and built simulation platform by Matlab/Simulink and simulated the strategy. The simulation result shows that the synchronous control strategy mentioned in this article can overcome synchronization error brought by external disturbance and parameter variation. Moreover, it will better achieve the multi-motor synchronous control compared with the traditional virtual shaft synchronization scheme

scholarly journals Development and control strategy research for subsea all-electric actuators

2021 ◽  
Author(s):  
Peng Liu ◽  
Kewen Wang ◽  
Qianqian Chen ◽  
Jinfeng Cao ◽  
Jie Liu ◽  
...  
Keyword(s):  
Control Strategy ◽  
Production Systems ◽  
Superior Performance ◽  
Fuzzy Pid ◽  
Servo Motor ◽  
Electrical System ◽  
Synchronous Control ◽  
Single Motor ◽  
Christmas Trees ◽  
And Control

Abstract The development of subsea all-electric Christmas trees is an area of focus in the offshore oil industry worldwide. The main difficulties are associated with the development and control strategies for subsea all-electric actuators, which are the most critical components of subsea Christmas trees. In this paper, a single-motor level fuzzy PID control with an integrated working condition detection module and a 3-motor redundant-level deviation strategy with coupled joint synchronous control were proposed to realize the real-time determination of algorithm parameters according to the working conditions, accelerate convergence to solve the problem of rapid redistribution, maintain the fast speed of the servo motor of the subsea all-electric tree valve actuator, conduct simulation analyses of the synchronous control model, build the synchronous control electrical system and test this system. With the simulation analysis, a synchronous control electrical system was built, tested and verified. The simulation results of the control strategy show that the proposed single-motor fuzzy PID-deviation coupled control strategy in this paper tends to be stable approximately 0.2 s after the system is started; additionally, with this approach, the convergence speed is faster than that of the traditional PID method, tracking errors are highly reduced, and robustness to load shocks is decreased. The test results show that when the inlet pressures are 1.0 MPa, 1.5 MPa and 2.0 MPa and the three servo motors simultaneously work, the control effect is good, the synchronization effect is good. When one servo motor fails, the two redundant servo motors can still control the all-electric valve actuator and provide good synchronization control capabilities. When the inlet pressure is 1.0 MPa, 1.5 MPa and 2.0 MPa, whether the system is in normal operation or a servo motor fails, the vertical and horizontal vibration values of the system are within reasonable ranges. This result verifies that the proposed control strategy yields superior performance in power distribution compared to traditional systems and strong robustness. The synchronous control strategy can be applied to the synchronous control problem of subsea all-electric production systems, which is of great significance for the development of subsea all-electric production systems.

Research on Synchronous Control Technique of the Tube Hydroforming

2012 ◽  
Vol 233 ◽  
pp. 142-145
Author(s):  
Jin Yu ◽  
Deng Xu ◽  
Guo Qing Huang
Keyword(s):  
Control Strategy ◽  
Iterative Learning Control ◽  
Tube Hydroforming ◽  
Great Influence ◽  
Learning Control ◽  
Iterative Learning ◽  
Control Technique ◽  
Important Indicator ◽  
Synchronous Control ◽  
Control Accuracy

Synchronous control accuracy of side-cylinders of the hydroforming press is a very important indicator , it has a great influence on the quality of products. Generally, people take PID control strategy to improve the precision of hydroforming press. In this paper, a mathematical model of the side-cylinders’ hydraulic system is established and the PID and iterative learning control strategy is used, respectively, to find which one is better . The results show that the iterative learning control strategy has a higher synchronous control accuracy.

The Design of the Giant Die Forging Hydraulic Press Synchronous Control System and its Dynamic Simulation

2012 ◽  
Vol 190-191 ◽  
pp. 836-841
Author(s):  
Zhong Wei Liu ◽  
Ying Jian Deng
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Sliding Mode ◽  
Mathematic Model ◽  
Hydraulic Press ◽  
National Defense ◽  
Beam Position ◽  
Synchronous Control ◽  
Die Forging ◽  
Short Period

The giant hydraulic press is the essential equipment of our country national defense and the infrastructure. The hydraulic synchronous control system is the important constituent of the hydraulic press, it is very important in improving the dimension accuracy of the product, ameliorating the force standing state of the die forging hydraulic press frame, extending the life of the die forging hydraulic press body and the moulds. To use 300 MN die forging hydraulic press’s synchronous control system for reference, according to a giant die forging hydraulic press its own characteristics, design the synchronization control system. Through the establishment of the mathematic model of the system, and choose the sliding mode-PID control strategy and simulation, the results show that :using PID sliding-mode control strategy of synchronous control system, the eccentric moment after stability, can over a short period of time after the stagnation, quickly will move back to level calibration beam position, get close to zero static deviation. But using the common sliding mode-PID can not overcome the disturbance bringing by the parameter perturbation, so the corresponding nonlinear and intelligent control strategy is particularly necessary.

2-DOF Synchronous Control of 6PUS-UPU Parallel Manipulator

2014 ◽  
Vol 1061-1062 ◽  
pp. 889-892
Author(s):  
Kui Jing Zheng ◽  
Chao Wang ◽  
Hong Zhou
Keyword(s):  
Control Strategy ◽  
Parallel Manipulator ◽  
Internal Model Control ◽  
Current Loop ◽  
Position Tracking ◽  
Control Performance ◽  
Synchronous Control ◽  
Model Control ◽  
Force Signal ◽  
Servo Controller

To meet the increasing demands on the control performance of parallel manipulator, servo control strategy for parallel manipulator was researched systematically. Combined 2-DOF control with Internal Model Control, the servo controller for parallel manipulator was optimized as smoothly and efficiently as possible. On the basis of the original current loop and speed loop, the position loop was redesigned to have both good position tracking characteristics and anti-disturbance capacity. The synchronous control strategy combined position signal and force signal was proposed. The actual experiments show that 2-DOF synchronous control has better stability and position tracking performance compared with the traditional PID control. The control performance of parallel manipulator is improved effectively.

Co-Simulation ADAMS-Simulink for Analysis of Passive Four-Point Leveling System of the Hydraulic Press

2016 ◽  
Author(s):  
Chungeng Sun ◽  
Jianhua Wei ◽  
Jinhui Fang ◽  
Chengzhang Huang ◽  
Mingjie Li
Keyword(s):  
High Precision ◽  
Control Strategy ◽  
Hydraulic System ◽  
Mathematic Model ◽  
Development Trend ◽  
Hydraulic Press ◽  
Operational Parameters ◽  
Synchronous Control ◽  
Displacement Sensors ◽  
The Development Trend

The four-point leveling hydraulic system (FLHS) is a key component of high-precision hydraulic press. To meet the development trend of leveling system of hydraulic press, such as large stroke, anti-bias load ability, big leveling torque, principle of passive FLHS with four axis synchronous controlling has been proposed, using four high-precision displacement sensors and four high-response servo-proportional valves (HSPV). Because the HSPV has a certain predictive opening, during the process of passive leveling operating, linearization of the mathematic model at operating point is necessary. In this paper, a simulation model of the system, which uses the average type synchronous control strategy, is built with ADAMS and MATLAB / Simulink, as well as the operational parameters of the model. The result of the simulation shows that the system using the average type synchronous control strategy is able to ensure the synchronization error among the four axis of the leveling system. It also suggests that the proposed leveling and the control strategy are reasonable, effective and feasible.

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