The torque-angle characteristics of electric-mechanical converters are important determinants of the quality of electrohydraulic proportional control systems.It is far more difficult for a rotary electric-mechanical c...The torque-angle characteristics of electric-mechanical converters are important determinants of the quality of electrohydraulic proportional control systems.It is far more difficult for a rotary electric-mechanical converter(REMC)to obtain flat torque-angle characteristics than traditional proportional solenoid,greatly influencing the promotion and application of rotary valves for electrohydraulic proportional control systems.A simple and feasible regulation method for the torque-angle characteristics of REMCs based on a hybrid air gap is proposed.The regulation is performed by paralleling an additional axial air gap with the original radial air gap to obtain a flat torque-angle characteristic and increase output torque.For comparison,prototypes of REMCs based on hybrid and radial air gaps were manufactured,and a special test rig was built.The torque-angle characteristics under different excitation currents and step responses were studied by magnetic circuit analysis,finite element simulation,and experimental research.The experimental results were consistent with the theoretical analysis.It was shown that REMCs based on a hybrid air gap can obtain a flat torque-angle characteristic with further optimizing of key structural parameters and also increase output torque.This regulation method provides a new approach for the design of proportional rotary electromechanical converters.展开更多
The principle and design method of the large gap magnetic drive system is studied in this work. The calculation model of the torque-angle characteristic in the large gap magnetic drive system driven by traveling wave ...The principle and design method of the large gap magnetic drive system is studied in this work. The calculation model of the torque-angle characteristic in the large gap magnetic drive system driven by traveling wave magnetic field is established. The calculation model is computed by using MATLAB software, and the pattern of the system’s torque-angle characteristic is obtained by analyzing study results. These results indicate that: torque-angle characteristic and the driving torque of the system can be adjusted by changing the electric current of coil, the magnetization of permanent magnetic gear, the inner diameter of permanent magnetic gear, the coupling distance between electromagnet and permanent magnetic gear, the outer diameter of permanent magnetic gear, and the axial length of permanent magnetic gear.展开更多
The assembly quality of the tube system,which serves as the“blood vessels”and“trachea”of the aircraft,has a crucial impact on the stable and reliable service of aircraft.At present,the tightening control method of...The assembly quality of the tube system,which serves as the“blood vessels”and“trachea”of the aircraft,has a crucial impact on the stable and reliable service of aircraft.At present,the tightening control method of the tube system is mainly the torque control method,which exhibits considerable discreteness and has difficulty achieving precise control of the assembly quality.This paper constructed a torque-angle tightening control model based on the torque–force relationship and angle-force relationship of aviation tube systems.Through tightening experiments with five tube diameters,the initial tightening degree,re-tightening operation,lubrication condition,tube material,and connector material were investigated by comparing the torque-angle tightening curves.Results showed that the re-tightening operation can increase the tightening torque by at least%,the lubrication condition can reduce the target torque by about 16%,and the control angle range can be reduced by about 10°.Further theoretical and experimental analysis revealed that the system stiffness remained stable at 90000N/mm when the tube diameter was greater than mm.The torque–tension coefficient remained stable at around 0.16,while the angle-tension coefficient gradually decreased with the increase in the tube diameter.展开更多
基金Supported by National Natural Science Foundation of China(Grant No.51975524).
文摘The torque-angle characteristics of electric-mechanical converters are important determinants of the quality of electrohydraulic proportional control systems.It is far more difficult for a rotary electric-mechanical converter(REMC)to obtain flat torque-angle characteristics than traditional proportional solenoid,greatly influencing the promotion and application of rotary valves for electrohydraulic proportional control systems.A simple and feasible regulation method for the torque-angle characteristics of REMCs based on a hybrid air gap is proposed.The regulation is performed by paralleling an additional axial air gap with the original radial air gap to obtain a flat torque-angle characteristic and increase output torque.For comparison,prototypes of REMCs based on hybrid and radial air gaps were manufactured,and a special test rig was built.The torque-angle characteristics under different excitation currents and step responses were studied by magnetic circuit analysis,finite element simulation,and experimental research.The experimental results were consistent with the theoretical analysis.It was shown that REMCs based on a hybrid air gap can obtain a flat torque-angle characteristic with further optimizing of key structural parameters and also increase output torque.This regulation method provides a new approach for the design of proportional rotary electromechanical converters.
文摘The principle and design method of the large gap magnetic drive system is studied in this work. The calculation model of the torque-angle characteristic in the large gap magnetic drive system driven by traveling wave magnetic field is established. The calculation model is computed by using MATLAB software, and the pattern of the system’s torque-angle characteristic is obtained by analyzing study results. These results indicate that: torque-angle characteristic and the driving torque of the system can be adjusted by changing the electric current of coil, the magnetization of permanent magnetic gear, the inner diameter of permanent magnetic gear, the coupling distance between electromagnet and permanent magnetic gear, the outer diameter of permanent magnetic gear, and the axial length of permanent magnetic gear.
文摘The assembly quality of the tube system,which serves as the“blood vessels”and“trachea”of the aircraft,has a crucial impact on the stable and reliable service of aircraft.At present,the tightening control method of the tube system is mainly the torque control method,which exhibits considerable discreteness and has difficulty achieving precise control of the assembly quality.This paper constructed a torque-angle tightening control model based on the torque–force relationship and angle-force relationship of aviation tube systems.Through tightening experiments with five tube diameters,the initial tightening degree,re-tightening operation,lubrication condition,tube material,and connector material were investigated by comparing the torque-angle tightening curves.Results showed that the re-tightening operation can increase the tightening torque by at least%,the lubrication condition can reduce the target torque by about 16%,and the control angle range can be reduced by about 10°.Further theoretical and experimental analysis revealed that the system stiffness remained stable at 90000N/mm when the tube diameter was greater than mm.The torque–tension coefficient remained stable at around 0.16,while the angle-tension coefficient gradually decreased with the increase in the tube diameter.
