De Gong Chang

Bio: De Gong Chang is an academic researcher from Qingdao University of Science and Technology. The author has contributed to research in topics: Universal joint & Tripod (photography). The author has an hindex of 3, co-authored 25 publications receiving 142 citations.

The Influence Analysis of Globular Indexing Cam Mechanism Size Parameters on Transmission Performance

Abstract: The globular indexing cam mechanism is a kind of high-speed and high-precision indexing mechanism, widely used in the field of mechanical transmission, which has the character of smooth transmission, high-precision indexing, large transfer torque, wider choice of dynamic and static ratio, simple structure and low cost, etc. In this paper, the working principle and the main movement parameters of globular indexing cam mechanism are analyzed, and the dynamics simulation of this mechanism is done by using ADAMS dynamic simulation software to analyze the influence of size parameters on the transmission performance, which provides reliable theoretical basis for understanding the property and designing the parameter of globular indexing mechanism.

Kinematic investigation of tripod sliding universal joints based on coordinate transformation

Abstract: In order to understand the kinematics of the tripod sliding universal joint, its kinematic equations were established based on coordinate transformation and then the effects of the joint angle, the rotating radius of the slide-rods, the length of the output shaft, and the frequency of the input shaft on its kinematics were investigated. The increase of the joint angle or the rotating radius of the slide-rods or the frequency of the input shaft enhances not only the relative motion of the slide-rods, but also the periodic oscillation of the output shaft along the rotating direction. However, increasing length of the output shaft weakens its periodic oscillation and hardly affects the relative motion of the slide-rods. In addition, the increase of the joint angle or the rotating radius of the slide-rods increases the fluctuation of the joint angle, but increasing length of the output shaft reduces it.

Air Dynamics Characteristics Analysis of Air Splicer

Abstract: Air splicing technology is the key technology to realize high speed, high quality and automatic winding in modern textile industry. However the current research of splicing mechanism is still in qualitative analysis, theoretical and experimental exploration stage. By modern computational mechanics method, with the air flow analysis results in different structures and shapes of splicer chamber, the air flow patterns under high pressure are determined; and the optimized structural characteristics of the splicing chamber are obtained in this paper. The results provide theoretical support on the innovative splicer chamber design, promote the development of the new air splicing technology, create important practical value, and provide the feasible means and methods in the air splicer theory research and optimization design.

Research on the Impact of Vent Pressure on the Yarn Splicing Based on ANSYS

Abstract: Pneumatic splice makes use of high-speed compressed air as the driving force to complete the yarn splicing, noticing that the change of the vent pressure has a significant effect on yarn splicing This paper studies the impact of vent pressure on the quality of yarn splicing when twisting and untwisting Modeling, analysis and simulation of the air splice is done with the integration of Pro/E and ANSYS software, to study the flow filed and obtain the influence on the speed and pressure of the inside the splicing chamber when changing the speed and pressure while keeping the diameter of splicing chamber diameter, the vent hole diameter and the relative angle are unchanged The results of the analysis of the air splice will lay a solid foundation for the further optimized structure design

Mechanical System Dynamics Simulation of Crank Linkage Mechanism Based on Pro/E

Abstract: The simulation analysis and research on crank linkage mechanism, which is the core part of the engine, are of important significance. Based on related theory, this paper introduces a simulation analysis method for crank linkage mechanism, which is using Pro/E. First of all, the 3D model of the mechanism is build; all the components are modeled and assembled. Then dynamic simulation for the crank linkage mechanism by using PRO/Mechanism is carried on, the result of characteristics of motion, stress, etc of the mechanism are shown. A more effective method about the simulation analysis of crank linkage mechanism is introduced in this paper.

Development and Application of Artificial Neural Network

Abstract: This paper introduces the developmental history,main patterns,theory and application of artificial neural network.

Estimation of Generated Axial Force Considering Rolling–Sliding Friction in Tripod-Type Constant Velocity Joint

Abstract: This study proposes a new generated axial force (GAF) estimation model of tripod-type constant velocity (CV) joints. For development of the model, kinematic analysis was performed to derive the rel...

Study of the Doubly Clamped Beam Yarn Tension Sensor Based on the Surface Acoustic Wave

Abstract: In this paper, a design method for the yarn tension sensor based on a surface acoustic wave is presented. When the yarn tension is applied to the sensor's doubly clamped beam (i.e., piezoelectric substrate), it is linearly related to the output frequency shift, which achieves the purpose of measuring the yarn tension. This paper deduces the functional relationship between the oscillation frequency shift of the sensor and the yarn tension. We put forward the choice of a piezoelectric substrate material, the choice of the piezoelectric die size, and the placement of interdigital transducers (IDTs) as the three key issues to be determined. By using the ANSYS software, we determined that the optimal piezoelectric substrate is quartz, and determined the optimal size of the die and the maximum strain area of the die. When IDTs are placed in the maximum strain area of the piezoelectric substrate, the sensor has the best sensitivity. We have designed and produced the sensor and also have tested the sensor. Experimental results: the range is 0–2 N, the linearity is 1.0112%, the hysteresis is 0.6153%, the repeatability is 1.1067%, the accuracy is 1.6205%, the maximum overload capacity is 200% (i.e., 4 N), and the fracture strength of the substrate is 5 N.

Dynamical Formulation and Analysis of RV Reducer

Abstract: Mesh stiffness of involutes pair based on Hertz formulation is formulated, take into account the affect of cycloid wheel’s curvature, new calculation method of cycloid-needle pair is presented, a 24-DOF dynamical model of the RV250AII is formulated by lumped-parameter method, solved the dynamic equation by Matlab software, results shows that the nature frequency of the reducer will changing at a tiny range with the turning of cycloid, the bearings support stiffness of planet carrier and the bending stiffness of crankshaft has obvious effect on the nature frequency.