Papers by Keyword: Hydraulic Control

Paper TitlePage

Authors: Han Song Yang, Peng Li, Li Zhi Gu, Hui Juan Guo
Abstract: It is the main decrease press type used in high speed train of semi suspension system, as the parameter can not be regulated freely of the semi suspension system, to design a kind of damping shock absorber which with the sensitive and soft system are very important, this system which using of the Electro hydraulic proportional valve to regulation the safety valve, the guide valve and the damping force of shock absorber, get the recycle method of the hydraulic system from inner to outside, and also using the suspension active control variable damping shock absorber to detect the road, this device, in fact, by vibration, which let the valve move relation, turn the mechanical energy into hot and release outside, thus decrease the vibration. To design this variable damping shock absorber ,compared with the semi suspension system ,for it has the connect system and Electro hydraulic proportional valve, and with the road detectors, and various variable parameters, Which let the high speed train more stable and safety, overcome the short of parameter regulation for the semi-automatic suspension system.
Authors: Jing Feng, Jian Li Zhang, Yong Tao Ma
Abstract: For the biggest top steel ring, the sampling device characteristic seriously influences on precision sampling. The simulation model was built in AMESim and certificated by experiments. Through simulation, the external load and the car interior are important factors in speed stability. It derived the calculation formula on external load and compared with experimental results. Under the load limit, the velocity will stable with load change. Above the load limit, the velocity will fluctuate violently. An overweight car prolongs the starting time and aggravates the braking vibration. Under a reasonable design specification, 300kg is optimum. These conclusions had been applied in this newly designed device effectively.
Authors: Hui Peng Chen, Jian Hua Liu, Guo Jin Chen, You Ping Gong
Abstract: In order to improve the maneuverability and the automation of loader working device, this paper establishes it’s Electro-Hydraulic Servo Position System mathematical model based on the working principle of its Hydraulic System, and designs a position controller for the loader working device using Single Neuron PID Control Algorithm. The tests of simulation were carried out on the platform of Matlab/Simulink. The simulation results show that Single Neuron PID Control Algorithm can improve the system control effect, process its real-time and static-dynamic characteristics with a simple controller.
Authors: Yan Li Chen, Wei Guo Hu, Jia Lin Liu, Hui Wang, Chun Xue Wang, Xiao Dong Wu, Shun An Liu, Lu Hong Yang
Abstract: The configuration diagram of wheeled vehicle was presented and the mathematical model of the important components was built according to the working principle of system. The subsystem properties of wheeled vehicle have analyzed by means of simulation method. Moreover, the climbing characteristic and anti- skidding properties of wheeled vehicle have done, the results shows that dual pump driving system is superior to a single pump driving system in terms of obstacle negotiation.
Authors: Wei Jiang, Ning Li, Jian Feng Zhu, Meng Zhang, Liang Ming Chen
Abstract: Through the advanced hydraulic control technology to solve many disadvantages of the present disassembly and assembly equipment of the buffer braking device, and the new disassembly and assembly equipment of the buffer braking device of the elevating mechanism of the heavy caliber ground artillery is designed, and it has a very important significance to improve the maintenance support efficiency of the equipment.
Authors: Cheng Zhong Chu, De Lei He, Yan Zhang, Man Ping Cheng
Abstract: Abstract: The coconut is a one of the main economic crops in the tropical region of China, and is also a selling one in summer in Hainan.But the way to punch or suck the coconut juice is still a manual work and has more than one process at present. Therefore, we studied and designed a machinery which is based on hydraulic control system, and can finish the work of clamping coconut, punching sucking juice together. It has simple structure,costs low, easy to assemble and efficiency as well.
Authors: Yunn Lin Hwang, Thi Na Ta, Cao Sang Tran
Abstract: Dynamic control on hydraulic machine system and kinematic control on industrial robotic manipulators are two studied topics in this research. The main objective of this study is to analyze dynamic, forward kinematic and inverse kinematic on a couple of mechanical systems and hydraulic mechanical systems in order to control these machines. The characteristics of hydraulic and manipulator robot parameters are firstly calculated by using dynamic theories. In the former topic, we perform an example on CNC machine tools which is designing a hydraulic controller to move a cutting tool along a circular path. Dynamics analysis, forward kinematics and inverse kinematics of industrial robotic are archived in the latter topic. Two experiments were also performed on RRR and RRRRRR manipulators by analyzing the inverse kinematic equations to make these robots follow the desired trajectories. This study takes innovations and achieves control improvement in different systems with optimization controller or trajectory planning.
Authors: Wan Qiang Wang, Hui Peng Chen, Guo Jin Chen
Abstract: This paper has set up the electro-hydraulic servo mathematical model for loader working device and devises a device motion controller with H∞ mixed sensitivity algorithm in order to improve loader’s automaticity and maneuvering performance. This paper has done some simulation research of the servo motion controller with Matlab/Simulink. And research has shown that the H∞ robust controller may improve working device’s automaticity and maneuvering performance enormously, the device motion controller has well robust stability and performance.
Authors: Jin Song Chen, Wen Bo Cheng
Abstract: 1780 mm hot rolling transport chain electro-hydraulic proportional hydraulic control system of Shanghai Meishan Iron and Steel Co., LTD. Of Baosteel is taken as an example in this paper. The features, the controlling method, the electro-hydraulic proportional directional valve selection and the decision of the specific circuits of this kind of metallurgical equipment are introduced in this paper.
Authors: Ling Jun Li, Thomas Thurner
Abstract: Multi-axial mechanical testing with servo-hydraulic cylinders is used as essential tool within the development and manufacturing process of mechanical components and structures, enabling the experimental validation of the fatigue behavior and related mechanical endurance limits. In this paper we derive the analytical model of servo-hydraulic cylinders feasible for fatigue tests to enable the incorporation of the derived actuator dynamics within multi-axis test control strategies. Our derived cylinder model includes the test cylinder with attached position sensor, and a state-of-the-art servo valve. Based on the obtained cylinder dynamics we propose a simplification to a low order cylinder model, highly desirable for reducing overall system complexity in order to develop ease-of-use controllers of high performance for multi-dimensional test rigs. We compare the simulated output of the derived actuator models with the measured data from a real world test cylinder system. The obtained results show that the obtained system model accurately describes the dynamic properties of a real world test cylinder, and furthermore validates the process of model simplification for efficient control of such cylinders as part of low-bandwidth multi input multi output servo-hydraulic test systems.
Showing 1 to 10 of 17 Paper Titles