Hui Feng Wang

Measurement of Armature Components' Synthetic Stiffness Based on Torque and Grating Ruler Sensor

The synthetic stiffness measurement principle of Armature Components which is similar to the actual working condition has been proposed. The synthetic stiffness measurement system based on the measurement principle has been established, the composition of this system has been introduced and the realization methods of the single couples loading and torque and angle measurement has been introduced in detail. And related experiments has been conducted. Through analysis the experiment data, the performance of organization has been tested, and so does the rationality of the measurement principle which is proposed.

Research of Grinding Concave Paraboloiding Piece by Spherical Grinding Wheel

Aiming at the ultra-sophisticated combined working machine tool that was developed, the motion style of the machine tool when abrasive machining a sort of inward-curving-parabolic shape optical aspherical surface device is analysed, according to the equation of the machined part’s surface, the relative movement locus between the cutter and the machined part can be established while using a spherical grinding wheel as grinding cutter. The caliber of the paraboloid that to be processed is analysed, and the grinding wheels installation angle is chosen, as well as the cutting speed of the cutting spot is analysed, the abrasive model in ideal condition is analysed, the basis is based for error compensating.

Design of the Auto-Stiffness Measuring Instrument for Electro Hydraulic Servo Valve Elastic Element

The electro-hydraulic servo valve is the essential component of the electro-hydraulic servo control, and it was mainly used on many fields such as aviation, aerospace and navigation etc.People use the electro-hydraulic servo valve to drive plenty of loads. The electro-hydraulic servo valve has many advantages such as fast dynamic response, high control precision, and longevity. Hence, for the elastic element of the electro-hydraulic, which works as the significant feed-back component the characteristic of the stiffness has played an essential role in the electro-hydraulic servo. Based on the previous research of the technology automation and inspection experiment, this paper proposes an auto-stiffness admeasuring apparatus for the elastic element of the Hydraulic servo. and the experiment research has been proceeded. The experimental result shows that, the auto-stiffness admeasuring apparatus has the advantages of high precision, high automation; it can be well used in the productive practice.

Research of Non-Contact Stiffness Measurement Technology

This article describes the elastic element of the servo valve, elaborates the definition of the stiffness of elastic element, analyzes the characteristics of existing rigidity measurement system, points out the limitations of the existing rigidity measurement system when it measures the large-stiffiness elastic element, utilizes a new measuring principle based on the existing stiffness test systems, uses the more accurate laser displacement measurement method to overcome the weaknesses of the existing stiffness test system, improves the measurement accuracy, makes stiffness measurements more accurate and promotes the stiffness measurement technology of the servo valve elastic element.

Improvement and Error Analysis of Spring Tube Stiffness Measurement

This article analyzes the deviation of existing stiffness measurement method and comes to the main components of the measurement error. Focus on the influence of the bending deformation all of aspects and contact deformation between the various links to the measurement accuracy. Establish the relationship between the actual deformation and the measured deformation to the spring tube through homogeneous coordinate transformation and finite element analysis, in order to identify the error sources impact on the measurement greatest, and improve the measure methods to against the main error source, eliminate the influence of the main error source to the stiffness measurement, then achieve the purpose of improving the measure accuracy.

Optimization of Spring-Tube Fixture Based on Elasticity

This article aims to optimize the clamp arms length and the number and shape of the slots of the spring-tube fixture. First it uses the theory of elasticity to create the force deformation model of slot with regular shape, and analysis the deformation of the slot numerically. Then draws the relationship between the elastic deformation and the radius of the bore and the arms length while the force is not change, and comes an ideal shape of the bore through this relationship. It also simulates the deformation of fixture with different number of modified slots through the finite element analysis method, and optimizes the fixture for equal strength further. In summary it comes to meet the requirements of fixture theoretically. Finally through experiments the theory gets verified. From the results of experiments the conclusion can be drawn that the corrected fixture is better than before.

The Dynamic Strength Analysis of a Conduit Connector

This paper takes a kind of 14 mm inner diameter, installation span for 600 mm conduit connector as an example to do the top 5 order modal analysis, resonance resistance analysis and random vibration analysis and gets the vibration model in the different frequency.

Development of the Control Section for a New Armature Components Assembly Machine and its Application Test

The armature components are the core component of the electro-hydraulic servo valve [. Its manufacturing and assembly accuracy directly affects the performance of the servo valve. The domestic existing electro-hydraulic servo valve armature assembly pressure equipment is so far behind that it is difficult to meet production requirements. For the needs of a servo valve production firm, authors department developed the armature components automatically press machine. In order to achieve automation and intelligent of press process, this article supports a electronic control system for the press machine to further improve its ability. And on the basis of certain experiments, the author proves the good performance of the pressure machine.

Structural Optimization of a Spacecraft Catheter Connector

Setting up the FEM model of a spacecraft catheter connector, analysis its static strength and optimized its structure, Shorten the diameter and reduced the weight of catheter connector, within the requirement of properties.

Development of a New Pressing Machine for Assembling Armature Components of Electro-Hydraulic Servo Valve

Armature components are the core component of the electro-hydraulic servo valve, and all the components of the armature components require high precision and assembly accuracy. Now, the armature components assembly uses an old-fashioned pressing machine, whose success rate and efficiency are low. This situation wastes a great deal of economic costs and time costs. To improve this situation, the authors develop a new type of automatic assembling machine to achieve automatic and high-precision assembly of the armature component.