Wang Shengze

Dynamics Analysis of a Controllable Mechanism

Hybrid mechanism is a kind of controllable mechanism. It may be composed of one or multiple coupled kinematic loops forming a mechanism network, and is highly nonlinear devices. The bond graph approach provides a compact and versatile representation for kinematics and dynamics of hybrid mechanism, and is more suitable for automatic derivation and computation on a computer. Here, an analysis procedure that can be used to produce the dynamics equations of hybrid mechanism is presented. According to bond graph model, dynamics equations can be derived. The unified formula of dynamics equations derived here is a regularized one. The driving powers of hybrid mechanism can be obtained in terms of physical parameters of mechanism and kinematic states, and no need to analyze acceleration of mechanism. Finally, a numerical example is presented illustrating its validity. The results show that efficiency and reliability of dynamics analysis for hybrid mechanism are enhanced obviously.Copyright

The conceptual design and simulation of mechatronic system base on UML

UML has been widely accepted by the software community for nearly more than fifteen years. As mechatronic systems design can no longer be seen as an isolated hardware design or software design activity, UML becomes of significant interest as a unification language for systems description combining both hardware and software components. This article provides a method based on the UML applied to conceptual design of mechatronic systems. The modeling concepts in the UML language are first introduced, including major diagrams for the representation of the behavior and the structure of systems. An example relevant to robot design is given. The article stresses the viewpoint that the design of modern mechatronic system is by nature a kind of design of the information system for the subsequent manufacturing, and addresses the question of UML-based design flows, and shows how UML can be applied step by step to the development of complex mechatronic systems. In the last part of the article, we show how UML tools can be combined with well-known simulation environments, such as MATLAB to verify and validate the conceptual design of the robot.

Experimental study on dynamic characteristics of a high-speed rolling ball bearing support system with rubber rings

The study presented in this paper experimentally studied the dynamic characteristics of the high-speed rolling ball bearing support system with rubber rings in the filament winding head of rotating machinery. First, a test-bed was established. Then, the amplitude-frequency relationship of the support system with three kinds different compression of rubber rings was measured and their relationship with respect to the structure of the support system with rubber rings was established. In particular, the equivalent stiffness and damping of the support system were calculated. This relationship is conducive to the optimization of design and vibration control of this kind of machinery.

The topological model of online user customized service

This paper is about how to develop personal customized product, which based on the environment of E-commerce platform. It theoretically constructed a model of development process by means of topology.

Study on Design the Stop Pipe Diameter of Packaging Viscous Fluid

The distribution of the speed and shear stress in viscous fluid with the laminar flow in the pipe were analyzed in this paper, then, the flow rate was calculated. Moreover, the stop pipe diameter was designed by calculating the balance of shear stress of viscous fluid in the pipe and the gravity of filling fluid. Analysis have The conclusions : stop pipe diameter of viscous fluid is proportional to viscosity and the square root of pipe length, and is inversely proportional to the acceleration of gravity and the square root of the filling factor.

The structural analysis of model construction based on element method

Element method model construction, a new approach for product modeling, is to positively impact on the front-end modeling methods for product design through boundary-lines of design deriving from progressive constraints on different parameter conditions.

CMAC Neural Network Control for High Precision Motion of Hybrid Actuator

Hybrid actuator is a new type of planar parallel robot, and requires precise control of the position of the mechanism. In order to achieve the desired accuracies, nonlinear factors as friction must be accurately compensated in the real-time servo control algorithm. According to the characteristics of the hybrid actuator, a hybrid intelligent control algorithm based on PID control and cerebellar model articulation control (CMAC) techniques was presented and used to perform control of hybrid actuator for the first time. Simulation results show that this method can improve the control effect remarkably compared with the traditional control strategy.Copyright