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This paper studies the comparative stiffness analysis of two over-constrained 2-RPU&SPR parallel mechanisms, these two 2-RPU&SPR parallel mechanisms are different in the joint distribution. Firstly, the kinematics of the two mechanisms are analyzed, the inverse and the forward positon problems of the two manipulators are obtained. Then, the dexterity analyses of the two mechanisms are carried...
Dividing the rotor-screw system of machine tool into a multi-degree-of-freedom torsion system, this paper educes the transfer function model of the mechanism including torsion vibration modes of the first two orders. Consequently, a mechatronic model of servo control system of feed drive including lead-screw torsion vibration is built. Based on this model, the simulation comparisons of dynamic characteristics...
The traditional network simulator don't have the ability of simulation for the process of large-scale network security incidents outbreak, we designed a grid-based Internet worm behavior simulator which is consisted of foreground applications and background analog subsystems in parallel. It makes the most of the benefit of the grid computing capability, resource and task management. The experimental...
Using beam wave interaction simulator (BWIS), one module of microwave tube simulator suite (MTSS), a wideband helix TWT has been accurately simulated. The slow-wave circuit parameters are calculated by high frequency circuit simulator.
In this paper we model peer-to-peer systems where content may become unavailable. First, using Markov Chains we capture the impact of parameters such as the server upload rate and the popularity of the files on the performance of the system. Then, we show the applicability of our model to the problem of optimal bundling. Bundling files together, rather than disseminating them separately, is a possible...
The spectrum resource gets scared with the development of wireless communication. Users in cognitive wireless mesh network need to switch among multi-channels to communicate. In this paper, we propose a mathematical model of multi-channel DCA protocol in cognitive wireless mesh network. This model is based on Bernoulli and M/M/K queuing model. From the validation by compare simulation with analytical...
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