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.

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.

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 The Prefabricated Construction Project’s Problems and Countermeasures of Construction Site Management

2021 ◽  
Vol 261 ◽  
pp. 03020
Author(s):  
Sanlong Man
Keyword(s):  
High Precision ◽  
Seismic Performance ◽  
Green Building ◽  
Development Trend ◽  
Construction Technology ◽  
Construction Site ◽  
Site Management ◽  
High Quality ◽  
The Development Trend ◽  
Prefabricated Building

In comparison of the traditional building system, prefabricated building can reflect the development trend of building industrialization. Prefabricated building speeds up the construction by manufactured high-quality and high-precision components in the factory; then assembling the components to the construction site. Which can meet the requirements of green building without the need of cast-inplace and assembly. However, the application of prefabricated building also has limitations: prefabricated building is still lack of perfect relevant standards and component atlas; compared with the traditional pouring building, the mechanical and seismic performance of prefabricated building is poor. In the aspect of factory manufacturing, there are some problems. For example, because the form of prefabricated components is monotonous, it is difficult to meet the diverse appearance requirements of buildings. At present, the improvement of prefabricated building mainly focuses on the production and construction technology of components, but it lacks the improvement of the project management.

Studies of Large Hydraulic Excavator Boom Energy Recovery Technology

2014 ◽  
Vol 602-605 ◽  
pp. 424-427
Author(s):  
Zhi Ming Meng ◽  
Yuan Cheng He ◽  
Ting Zheng
Keyword(s):  
Energy Saving ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Development Trend ◽  
Recovery System ◽  
New Energy ◽  
Energy Saving Technology ◽  
Saving Effect ◽  
Hydraulic System Design ◽  
The Development Trend

In this paper, Sichuan Bonny provided excavator experimental as a platform ,to testing the efficiency of various energy-saving hydraulic circuit. Based on the original hydraulic system design and adding new energy recovery system, observing the energy saving effect. Summarizes the large excavator hydraulic system common energy problems, deal with the problems from different aspects of hydraulic energy-saving technology describes the present state of hydraulic energy-saving technologies , and described the development trend of hydraulic energy.So that allows people to comprehensive understanding of this technology, to promote this technology popularization and application.

Hydraulic Transmission and Control Technology Based on Energy-Saving

2013 ◽  
Vol 441 ◽  
pp. 845-849 ◽  
Author(s):  
Zhu Xin Zhang ◽  
Li Liang
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Hydraulic System ◽  
Development Trend ◽  
Control Technology ◽  
High Efficient ◽  
And Control ◽  
Development Course ◽  
The Development Trend

Analyze the development course of hydraulic transmission and control technology from the perspective of energy conservation. Introduce several kinds of hydraulic components and hydraulic system of the application of energy conservation, the development trend of energy saving of hydraulic system is expounded. Provide some reference for reasonable design and high efficient application of hydraulic system.

scholarly journals The development trend of AC-style PDPs

1998 ◽  
Vol 82 (Appendix) ◽  
pp. 311-311
Author(s):  
Tetsuji Okajima ◽  
Chizuka Tani
Keyword(s):  
Development Trend ◽  
The Development Trend

scholarly journals Experimental Study on Wake Evolution of a 1.5 MW Wind Turbine in a Complex Terrain Wind Farm Based on LiDAR Measurements

2020 ◽  
Vol 12 (6) ◽  
pp. 2467 ◽  
Author(s):  
Fei Zhao ◽  
Yihan Gao ◽  
Tengyuan Wang ◽  
Jinsha Yuan ◽  
Xiaoxia Gao
Keyword(s):  
Wind Speed ◽  
Wind Shear ◽  
Wind Farm ◽  
Wind Farms ◽  
Field Measurements ◽  
Development Trend ◽  
Asymmetric Distribution ◽  
Lidar Measurements ◽  
Wind Characteristics ◽  
The Development Trend

To study the wake development characteristics of wind farms in complex terrains, two different types of Light Detection and Ranging (LiDAR) were used to conduct the field measurements in a mountain wind farm in Hebei Province, China. Under two different incoming wake conditions, the influence of wind shear, terrain and incoming wind characteristics on the development trend of wake was analyzed. The results showed that the existence of wind shear effect causes asymmetric distribution of wind speed in the wake region. The relief of the terrain behind the turbine indicated a subsidence of the wake centerline, which had a linear relationship with the topography altitudes. The wake recovery rates were calculated, which comprehensively validated the conclusion that the wake recovery rate is determined by both the incoming wind turbulence intensity in the wake and the magnitude of the wind speed.

Research of H∞ Robust Control for the Giant Die Forging Hydraulic Press’s Synchronous Control System under the Uncertainty Coefficient

2012 ◽  
Vol 190-191 ◽  
pp. 819-824 ◽  
Author(s):  
Ying Jian Deng ◽  
Zhong Wei Liu
Keyword(s):  
Control System ◽  
Robust Control ◽  
Control Algorithm ◽  
Hydraulic Press ◽  
National Defense ◽  
Synchronous Control ◽  
Performance Quality ◽  
System Synchronization ◽  
Uncertainty Coefficient

The giant hydraulic die press is our country national defense and the infrastructure essential equipment, the synchronous control system is the essential device to the giant forging hydraulic press, its synchronization control performance quality is good or bad will directly determine the quality of the product. This article through the proof of the theorem, gives the specific steps to achieve H∞ robust control algorithm. The simulation results show that: this control strategy has good inhibition to the change of system parameters, robustness is very strong, can well eliminate the system synchronization error.

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