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Aiming at the shortcomings of using traditional solid model for network-based simulation, the 3D visualization of the model and motion simulation for robot is realized by VRML and Java interaction through the External Authoring Interface (EAI) in this paper. In order to observe the three-dimensional robot in motion on a WEB browser, the virtual environment(More)
In order to obtain the accurate dynamic characteristics of spindle-bearing system during the design stage, the spindle-bearing system with finite element model is simulated by virtual software, and a method which springs and damping units imitate bearing support is proposed in this paper. The proposed method can predict the regular pattern which bearing(More)
Micro end-milling method is a universal micro manufacturing method, which can be used to fabricating complex 3D structures and parts with many materials. But compared with their micrometer order size, their surface roughness quality is not satisfied. In this paper, the different metal phase grains influences are researched, and the micro end-milling process(More)
Most modern exoskeleton devices for hand rehabilitation are bulgy and heavy for portable usage; some of them are even non-movable. To facilitate the therapy processes into patients' daily lives, a tendon driven hand exoskeleton device which was actuated by shape memory alloy(SMA) spring series was developed for hand motor function rehabilitation in this(More)
This paper takes a 3-UPS Parallel Machine Tool (PMT) as the object to study, and it mainly analyzed the singularity of machine in the workspace. Firstly the kinematics of this machine is analyzed on the basis of introducing the structure of PMT, the kinematics equation of PMT is established, and further the Jacobian matrix of PMT is obtained. Then the(More)
This paper takes one kind of 3-TPT parallel robot as the object to study. It mainly analyzes the posture error of movable platform influenced by the parallelogram mechanism of parallel robot. Firstly, on the basis of introducing the structure of parallel robot, the kinematics equation of the parallelogram mechanism of this parallel robot is analyzed and(More)
Tension-only or compression-only optimal stiffness design with displacement constraint is studied by a material-replacement method. In the method, the original tension-only or compression-only material is replaced with porous material which solid phase is isotropic and the modulus is equal to the tension modulus or compression one. When the material is(More)
The topology optimization of a structure with many subdomains is solved by a bionics approach, called as floating interval of reference strain energy density (SED). In practical engineering, a structure to be optimized may have many subdomains and each one is filled with a type of solid material as an initial design. To solve such kind of structural(More)
In this paper, one kind of 3-UPS parallel robot is researched. At first, the inverse matrix of Jacobian is obtained according to the inverse kinematics equation of parallel robot, and then the condition number of Jacobian matrix is acquired. Then, it takes the condition number of Jacobian matrix as measurable index to analyze the processing dexterity of(More)