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In this paper, a new type of electro-hydraulic proportional control system with three way cartridge valve is proposed. By establishing its mathematical model and simulation model, it is compared with the control system of the high pressure unloading valve. It is shown that the control performance of the proposed scheme is better than the system of the high pressure unloading valve. With accumulator...
The regular forging process has been the primary technology for forging workpieces manufacturing because of its well-known adaptation and performance, and it usually needs thousands of input power. In this study, the energy consumption of the conventional valve-controlled system for 22 MN forging press was analyzed firstly, and depicted that the valve-controlled system had huge energy losses. Then...
The synchronous control system is the essential device to the forging hydrauLic press, closely with the practical appLication of synchronous control problem, an active synchronism program is proposed based on multi-point driver. And its reLiabiLity is analyzed and calculated, and provides reference for the design.
The theme of the paper is treatment of discharges of sulfur dioxide from process of petrochemical, aiming at the problems of the long time, none linearity and the precise mathematic that is hard to build, we consider combining the advanced fuzzy control with the traditional automation technology to achieve low cost automatization. According to the principles of fuzzy control and the features of PLC,...
The mathematical model between the knife-carriage feeding speed and the diameter of the log is established. An automatic control system of hydraulic log-core veneer lathe based on C8051F020 is studied in this paper, C8051F020 is used to control the hydraulic system feeding. The displacement sensor is used to measure and feed back the diameter of the log, the control system automatically regulates...
Spring sorting system is the most important equipment of quality inspection in valve spring automatic production line. Based on embedded technology, a new spring sorting system composed of multiple controllers has been designed. In the system, each controller managed its related services, worked in parallel and coordinated through CAN-bus communication to ensure the system speed. The system defined...
This electronic controlling double-joined-valve system is a new type of electronic water-saving integrated system for toilet bowl according to the demand of domestic toilet water-saving. The electronic water-saving integrated system are consists of an electron control system, electromagnetic double joined valve, domestic wastewater reuse device, feedwater pipeline system, sewage drainage pipeline...
The dynamics model of the moving crossbeam is analysed when the hydraulic press is unbalance. This paper sets up the overflow compensation balance-synchronous control system dynamics model in AMESim. it analyzes controlling parameterspsila influence on synchronism accuracy and adjusting time The simulation result also verifies the high accuracy on the experiment hydraulic press employed this balance-synchronous...
The moving beam of large-scale water press's position holding precisely plays a great important role in works piece quality. Firstly a precisely synchronism control system is studied, then the factors which result in the decline of the synchronism control precision are analyzed, finally a new control strategy based on structure invariance is afforded.
In this paper, the automatic detection of defects in the stitchwork was studied. The defects were arranged in two groups, the defects on the seam and the defects on the cloth. Based on image processing principle, image preprocessing and segmentation of the two types of defects were introduced. The image texture characteristic parameters can be used to classify the defects. The characteristic parameters...
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