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Analytical Modelling and Experiment of Novel Rotary Electro-Mechanical Converter with Negative Feedback Mechanism for 2d valve

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 162-182页

作者： Bin Meng Mingzhu dai Chenhang Zhu Chenchen Zhang Chuan ding Jian Ruan College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China

The manufacturing of spiral groove structure of two-dimensional valve(2d valve)feedback mechanism has shortcomings of both high cost and *** paper presents a novel configuration of rotary electro-mechanical converter with negative feedback mechanism(REMC-NFM)in order to replace the feedback mechanism of spiral groove and thus reduce cost of valve *** order to rapidly and quantitative evaluate the driving and feedback performance of the REMC-NFM,an analytical model taking leakage flux,edge effect and permeability nonlinearity into account is formulated based on the equivalent magnetic circuit *** the model is properly simplified in order to obtain the optimal pitch *** simulation is used to study the influence of crucial parameters on the performance of REMC-NFM.A prototype of REMC-NFM is designed and machined,and an exclusive experimental platform is *** torque-angle characteristics,torque-displacement characteristics,and magnetic flux density in the working air gap with different excitation currents are *** experimental results are in good agreement with the analytical and FEM simulated results,which verifies the correctness of the analytical *** torque-angle characteristics,the overall torque increases with both current and rotation angle,which reaches about 0.48 N·m with 1.5 A and 1.5°.While for torque-displacement characteristics,the overall torque increases with current yet decrease with armature displacement due to the negative feedback mechanism,which is about 0.16 N·m with 1.5 A and 0.8 ***,experimental results of conventional torque motor are compared with counterparts of REMC-NFM in order to validate the simplified *** research indicates that the REMC-NFM can be potentially used as the electro-mechanical converter for 2d valves in civil servo areas.

关键词： Electro-mechanical converter Magnetic circuit topology Analytical modeling 2d valve

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Theoretical and experimental investigation on novel 2d maglev servo proportional valve

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Chinese Journal of Aeronautics 2021年第4期34卷 416-431页

作者： Bin MENG Hao XU Jian RUAN Sheng LI Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology Ministry of Education Zhejiang University of TechnologyHangzhou 310018China

This paper presents a novel two-dimensional maglev servo proportional cartridge valve(2 d maglev valve),where a contactless maglev coupling is introduced between electro-mechanical converter and valve body to realize functions of force transmission,spool position feedback and linear-rotary motion *** configuration can effectively reduce cost of both valve manufacturing and electro-mechanical converter,while still maintain features of 2 d valve such as null pilot leakage,high power-to-weight ratio and excellent anti-pollution ***,the characteristic equation of the valve is derived using linear theory,and the stability criterion is established for parameter *** influences of crucial structural parameters such as initial height of overlapping area,width of high-pressure and low-pressure holes,acting radius of magnetic force,pitch angle of maglev coupling,length of sensitive chamber and system pressure on the dynamic response are investigated based on AMESim numerical *** prototype valve is then designed and manufactured and a special test rig is *** no-load flow characteristic,load flow characteristic,leakage characteristic,amplitude and phase frequency characteristics and step response under different system pressures are *** experimental results are in a good agreement with the simulated *** an over-damped system,the prototype valve has excellent working stability,which can reach a no-load flow rate of 105.9 L/min with hysteresis of 3.51%,amplitude bandwidth of 28.7 Hz and phase bandwidth of 42.8 Hz under 21 *** research indicates that the 2 d maglev valve can be a potential solution of flow rate control valve for flight control surface system of civil aircraft with high pressure and large flow rate application.

关键词： dynamic characteristic 2d valve Maglev coupling Servo proportional valve Stability criterion

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