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Pipelines vibration analysis and control based on clamps'locations optimization of multi-pump system

Chinese Journal of Aeronautics 2022年第6期35卷 352-366页

作者： Xin LI Weihao LI Jian SHI Qiang LI Shaoping WANG School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China School of Automation Science and Electric Engineering Beihang UniversityBeijing 100191China

The violent vibration of hydraulic pipelines in aircraft may cause faults or even an accident,especially for the large aircraft with the multi-pump system because of different vibration sources and complex pipelines *** to the vibration analysis and control of the multipump system,this paper proposed the clamps’locations optimization to minimize the system impedance at vibration ***,the models of the flexible clamp and other components in multi-pump system were established,based on which,the system impedance was calculated by using Transfer Matrix Method(TMM);Secondly,the objective function is defined as weighted sum of system impedance at frequencies of different vibration ***,the clamps’locations were altered to change the system ***,The Chaotic Swarm Particle Optimization(CPSO)algorithm was applied to obtain the optimal clamps’locations and the minimum value of objective function which decreased by 36.4%compared to the value of original clamps’locations;Finally,the experiments from vibration and pressure test with original and optimized clamps’locations verified the effectiveness of the system impedance calculation and clamps’locations optimization method.

关键词： Clamp CPSO Impedance multi-pump Pipeline TMM Vibration

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Control characteristics of D + A combined multi-pump controlled system

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High Technology Letters 2018年第3期24卷 303-312页

作者：姚静 Wang Pei Cao Xiaoming Zhang Yang Kong Xiangdong College of Mechanical Engineering Yanshan University The Laboratory of Heavy Machinery Fluid Power Transmission and Control in Hebei Yanshan University National and Local Joint Engineering Center for Advanced Forging Press Forming Technology and Equipment Faculty of Engineering Yanshan University

In order to solve the flow mismatch problem between pumping source output and workload demand,a novel configuration of D + A combined multi-pump controlled hydraulic system,similar to a pump-controlled system,is proposed for a large power hydraulic system in this study. This novel configuration consists of several parallel fixed displacement pumps of different sizes and proportional variable displacement pumps,which is controlled by digital signal( on/off) and analog signal respectively( D + A pumps). The system flow is divided into two parts,one is the total flow from fixed displacement pumps,and the other is the rest desired flow supplied by variable displacement pumps to smooth and improve the demand flow. First,basic design principles and evaluation indicators of the proposed system are introduced. Then,a flow state matrix of the binary-coding digital pumps( 1: 2: 4) is obtained to provide the control signals of pumps. Experimental results show that the system output flow tracks well with acceptable flow deviation,though a little lag behind input signal.

关键词： multi-pump design principles flow state matrix evaluation indicator energy saving

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维普期刊数据库

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Single-acting double-stator multi-pumps and multi-motors

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Journal of Chongqing University 2010年第4期9卷 208-215页

作者：闻德生 Tetsuhiro TSUKIJI College of Mechanical Engineering Yanshan University Faculty of Science and Technology Department of Engineering and Applied Sciences Sophia University

We investigated a series of novel motors and pumps with a new structure called double-stator. Double-stator can be used as pump or motor just for the working condition on demand. A certain amount of pumps or motors are formed in one shell and these subpumps or submotors can work alone or in company without influence on other pumps or moters. This kind of double-stator pumps (motors) are called multi-pumps (multi-motors). Through the analysis of multifarious connection modes of single-acting double-stator multi-pumps and multi-motors, the mathematical expressions of output flow rate, rotational speed and torque are acquired. The results indicate that different flow rates can be provided by one fixed displacement double-stator multi-pump system under the condition of an unalterable driven speed. Likewise, under the terms of a fixed input flow and without complex variable mechanisms, the functions of double speeds, multiple speeds and even differential connection can be realized by a double-stator multi-motor system with various output rotational speeds and torques.

关键词： multi-pump multi-motor multiple flow rate multi-torque multi-speed

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