Study on the compensation control of electro-hydraulic servo force loading in nonlinear variable load condition

2018 ◽  
Vol 233 (6) ◽  
pp. 677-688 ◽  
Author(s):  
Yong Sang ◽  
Weiqi Sun
Keyword(s):  
Load Condition ◽  
Variable Load ◽  
Force Loading ◽  
Compensation Control ◽  
Hydraulic Servo

Motor Torque Stability and Controlling Research in Variable Load Condition

2014 ◽  
Vol 940 ◽  
pp. 380-385 ◽  
Author(s):  
Yan Zhi Cheng ◽  
You Liang Ma ◽  
Xi Chen
Keyword(s):  
Fuzzy Control ◽  
Control Method ◽  
Load Condition ◽  
Control Model ◽  
Control Law ◽  
Variable Load ◽  
Real Condition ◽  
Handling Characteristics ◽  
Motor Load ◽  
Special Control

The torque stability and shutdown control of electric learner-driven vehicle (ELV) in the condition of motor load suddenly changing make the ELV has the same clutch handling characteristics with the traditional vehicle, and this makes the ELV popularization possible. A special control method is put forward in this article to achieve the consistency with the mechanical properties of engine. A multiparameter control model to identify the real condition of clutch handling by driver is builded with fuzzy control law. The torque stability and shutdown control of the motor with the load raising rapidly condition are approached by the adjusting of armature voltage with PWM control law. Keywords: Electric Learner-driven Vehicle;Torque Stability;Fuzzy Control

scholarly journals A Model-Based Method for Leakage Detection of Piston Pump Under Variable Load Condition

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 99771-99781 ◽  
Author(s):  
Hongbin Tang ◽  
Wenxian Yang ◽  
Zichao Wang
Keyword(s):  
Load Condition ◽  
Piston Pump ◽  
Variable Load ◽  
Leakage Detection ◽  
Model Based

Realization and Analysis of Bending Fatigue Strength Test for Gears under Random Loading

2011 ◽  
Vol 291-294 ◽  
pp. 1297-1302
Author(s):  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
Shi Hua Zu ◽  
Xiao Wang Gao
Keyword(s):  
Fatigue Life ◽  
Gaussian Distribution ◽  
Testing Machine ◽  
Load Condition ◽  
Load Spectrum ◽  
Random Loading ◽  
Random Load ◽  
Bending Fatigue ◽  
Hydraulic Servo ◽  
Bending Fatigue Strength

For the bending fatigue under the random load condition, the Miner cumulative fatigue theory was analyzed qualitatively. Random amplitude fatigue load spectrum for experiments was compiled according to that gears work under the load with Gaussian distribution load spectrum. Gear bending fatigue was carried out by the method of group test under the conditions of random load on the electro-hydraulic servo testing machine. Then the P-S-N curve of bend fatigue was got under Gaussian distribution load spectrum with particular coefficient of variation. Experiments prove that fatigue life from the result of random luffing amplitude fatigue experiments is lower than that from constant amplitude fatigue experiments, in which the upper limit of fatigue loads is the mean of load spectrum. It will be not reliable to estimate the bending fatigue life of gears that in the actual service.

Decoupling Compensation Using in the Hydraulic-Servo System of Mould

2012 ◽  
Vol 184-185 ◽  
pp. 1526-1532 ◽  
Author(s):  
Liang Li ◽  
Xiong Zhou ◽  
Xiao Gang Deng
Keyword(s):  
Hydraulic System ◽  
Servo System ◽  
Mutual Interference ◽  
Two Dimensional ◽  
The Real ◽  
Compensation Control ◽  
Hydraulic Servo ◽  
System Output ◽  
Hydraulic Servo System ◽  
And Control

The hydraulic-servo system of mould is a typical two-dimensional hydraulic-servo system, what stored among pass way was handed in and uniting interfering with between every pass way of the system. Because of the connection of the load system, output and control of every pass way influencing each other, cause the coupling of load, influence the system, even cause the systematic instability. This text apply on coupling and decoupling principle, mutual interference problem of many pass way that exists in the hydraulic system of mould, is studied by decoupling compensation control. Through the theory pushing over, we bring forward the decoupling compensation method, which can solve mutual interference problem. Have verified the feasibility of this method in the real artificial experiment too, and can solve mutual interference problem in the hydraulic and systematic of mould effectively.

Study on Coordinated Control Theory of Shield Thrust Hydraulic System

2012 ◽  
Vol 619 ◽  
pp. 399-405
Author(s):  
Huan Huan Feng ◽  
Kui Chen ◽  
Xiang Dong Wu ◽  
Feng Yuan Li ◽  
Zhu Feng Wang
Keyword(s):  
Control Theory ◽  
Load Condition ◽  
Coordinated Control ◽  
Joint Modeling ◽  
Control Technique ◽  
External Loading ◽  
Variable Load ◽  
Fuzzy Pid Control ◽  
Compound Control ◽  
Thrust System

In order to improve the dynamic coordinated control performance of shield thrust hydraulic cylinder during the shield construction process, we used the shield electro-hydraulic control synthetic experimental platform as research object. The simulation models of thrust system and external loading were built in AMESim. The result of PID closed-loop simulation indicated that thrust system can enable the compound control of thrust pressure and velocity by using the compound control technique of pressure and flow. In view of the complex and varied external load condition of shield thrust system, we simulated the fuzzy and fuzzy-PID control strategy of thrust system in passive automatic adjustment mode, based on the Joint Modeling and Simulation Environment (JMASE) of AMESim and Matlab/Simulink. The multi-external loads of thrust system mainly contained unequal-fixed load, equal-variable load and unequal-variable load. Finally, a coordinated control theory of shield thrust system was put forward. Such theory could provide some theoretical guidance for the design of shield machine and control of shield construction.

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