乘用车通风盖板断面设计要求

乘用车通风盖板在整车通风、排水、美观上起着重要作用,因其与前风挡玻璃、翼子板、发动机舱零部件相互配合,结构设计非常复杂,这就需要研发工程师要充分考虑通风盖板开发过程中的设计要求、法规要求、结构限制以及工艺要求和材料选择等因素,本文从通风盖板断面设计入手,重点介绍了通风盖板与对手件配合的断面设计要求。     

CATV自动寻址与收视控制信息系统研究

CATV自动寻址与收视控制信息系统将通讯、计算机、软件、自动化控制等理论结合起来,能够对收视末端进行自动寻址和控制收视状态。本系统通过主控软件系统把收视用户交费信息以及地址信息编码后,生成数字信号发送到FSK数据加密调制器,再由FSK数据加密调制器发送到CATV前端混合器,由CATV前端混合器将编码数字信号和电视信号混合后传输到智能寻址集中分配器,最后由智能寻址集中分配器控制用户收视状态。     

Analysis on maneuvering motion characteristics of submarine under static moment in vertical plane北大核心CSCD

[Objectives]Aiming at the problem of poor depth-changing ability of the stern rudder of submarine at low speed, and the problem of reversing the movement trend is difficult when the stern rudder is stuck and encountering abrupt changes of seawater density in the vertical steering maneuver. This paper conducts the mechanism research of static moment maneuver. [Methods]First, it is proved through theoretical analysis that the static moment maneuver can eliminate the reversed velocity phenomenon of the stern rudder. Then, the surfacing process under the static moment maneuver and the rudder hydrodynamic control is numerically simulated. [Results]The simulation results show that the static moment maneuver can make the submarine maintain good vertical plane maneuverability at low speed, eliminate the reversed velocity phenomenon of the stern rudder, and avoid excessive trim angle of the submarine at high speed. At the same time, the recovery effect of the two emergency situations of rudder jamming and falling deep has been improved. [Conclusions]The static moment maneuver is beneficial to the maneuverability and safety of the submarine. The research in this article can provide a reference for the maneuverability design of submarine. © 2023 The Author(s).