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压电陶瓷冲击驱动机构在微细进给与操作中的作用   总被引:2,自引:1,他引:1  
介绍一种用于微细进给与操作的压电陶瓷冲击驱动机构,由于质量块、配重块和压电陶瓷三者组成,交替控制压电陶瓷的愉速伸长与缓慢收缩,配重块不断获得动量,以一定的冲击动推动主质量块作快速而微细的步进运动。  相似文献
2.
When the explosive disposal robot traveling over a rough road,it will shake up and down,and generates dynamic loads.Furthermore,the jolt of the explosive disposal robot will result in oscillation and large inertia forces of the explosive,and will effect the stability of the grasped explosive,even cause the explosive slipping from the claw and falling to the ground,which seriously threats the saJety of the robot and around environment.A tracked explosive dispasal robot has been developed at South Chi- na University of Technology.This paper takes the explosive disposal robot and the grasped explosive as study object.Especially fo- cuses on the response analysis of the grasped explosive when the robot traveling over a rough road.Analyzing the vibration character- istic of the explosive and the effects of the robot moving speeds on the stability of the explosive.The dynamic response of the explosive is obtained by simulation,the results show that the velocity of the robot is a sensitivity influence factor on the oscillation of grasped explosive.  相似文献
3.
针对0402片式网络电阻的“曼哈顿”问题,介绍了“曼哈顿”现象的成因以及主要影响因素,并结合实际生产所遇到0402片式网络电阻的“曼哈顿”问题,从研发及生产工艺方面提出相应的改善和预防措施;在研发阶段,通过修改0402片式网络电阻的焊盘尺寸,在生产阶段通过进一步规范作业要求,使得产品的故障率由0.44%下降到0.04%.  相似文献
4.
The variable message signs (VMS) have been widely used in guiding and managing the dynamic traffic with development of intelligent transportation technologies. It is known that cell transmission model (CTM) can well reproduce such traffic dynamics as shock waves and jams. This paper presents a new method to estimate the route travel times by using the CTM in conjunction with a logit-based route choice rule. The impacts of VMS on a two-route scenario with recurrent and non-recurrent traffic congestion are numerically investigated by analyzing the changes of route flow and travel time. Simulation results show that in networks with suitable long links, the VMS can positively influence travelers' decision making so as to improve the system performance. For non-recurrent congestion, the value space of the route choice parameter that affects the flow distribution between two routes is narrower in the case of high traffic demand than that in the low demand case.  相似文献
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