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2015年8月17日下午16:30,长征五号运载火箭成功完成二级箭体动力系统第二次试车试验。此次试验系长征五号最后一次地面点火试验,首飞指日可待。
在天津厂区完成测试的长征五号芯二级动力系统试车箭
CZ-5 core second stage power system test module in Tianjin factory.
左侧是5米直径的二级液氢储箱,右侧是3.35米直径的二级液氧储箱。
On the left is 5m diameter liquid hydrogen tank, on the right is 3.35m liquid oxygen tank.
7月24日15时8分,我国在研长征五号运载火箭,在北京成功进行了芯二级首次动力系统试车。此次试车是我国迄今为止开展的最长时间系统级火箭动力试车,也是长征五号运载火箭转入发射场合练阶段的重要前提,对于按期实现成功首飞具有重要意义。
国防科工局副局长、国家航天局副局长吴艳华,国防科工局科技委主任栾恩杰在现场指导试车。
用于此次试验的长征五号运载火箭芯二级产品,直径5米,总长约11米,使用无毒无污染的液态氧和液态氢作为火箭发动机推进剂。点火后,火箭芯二级动力系统按照真实飞行时序,圆满完成了两次启动点火,考核验证了芯二级模块设计方案的正确性和工作协调性。
长征五号运载火箭不仅是我国首型全新研制的新一代运载火箭,也是我国目前运载能力最大的运载火箭,承担着后续探月工程三期、载人空间站等多个国家重大科技专项发射任务,目前已进入工程研制决战决胜阶段。
7月24日下午15点29分,由大火箭研制生产的“长征五号”运载火箭成功完成二级动力系统试车第一次试验,全面验证各系统性能。长征五号是我国目前运载能力最大、尺寸最大的火箭,计划于2016年首飞,其研制生产工作凝聚着全体大火箭人的心血。
At 15:08 on July 24 in Beijing, start of first test of core second stage power system. The test follow actual flight sequence with twice ignition firing. It successfully completed at 15:29.
2015年8月17日下午16:30,长征五号运载火箭成功完成二级箭体动力系统第二次试车试验。此次试验系长征五号最后一次地面点火试验,首飞指日可待。
Following the first test above, on 17th Aug 16:30 Beijing time, second test of core second stage power system completed successfully.
All ground firing testing for CZ-5 propulsion or power system are now completed.
航天科技五院502所“在轨卫星维护服务”地面试验
2015/08/20
太空机器人加油过程:“左手”抓取、连接 “右手”加油
Space robotic arms refueling: "left hand" gripping follow by "right hand" refueling.
据中国航天科技集团五院502所研发人员介绍,“太空医生”的两个机械臂相当于人的两只手,通过“左手”完成对卫星的抓取和连接,再通过“右手”顶上的加油枪完成对卫星的加油工作。说来轻松,可在太空失重环境下,整个过程就变得复杂了许多。
太空加油难度超过航天器对接 机器人每次运动轨迹都不一样
据研发人员介绍,在空中加油和在地面给汽车加油不一样,首先要对得准。这种对接方式是一种合作姿态的对接。像目标飞行器,比如天宫,是有姿态控制的,但如果是对一颗失效的、没有燃料的卫星,它是不能提供合作的姿态,所以这种对接要比天宫和神舟的对接更难。
据了解,完成每一次任务,每一次操作,机器人的动作轨迹都是不一样的。包括它自己识别对象,识别加注接口,然后自主地控制接壁,规划接臂的轨迹,使得接臂自主到达目标稳定,再切换能力控制,形成稳定可靠的连接,为最后的加油做好准备。
妙手回春:能让卫星“起死回生” 多功能好比瑞士军刀
虽然过程艰难,但这样的燃料补加对很多航天器有着重要意义。许多卫星本身情况良好,仅仅因为燃料耗尽就不得不废弃。如果有了这样的空中加油机器人,就能让燃料耗尽的卫星“起死回生”,而事实上,给卫星加油还只是这位太空航天员众多的技能之一。
除此以外,它还能够自主更换工具,就像瑞士军刀一样。比如拧螺丝时,就能换成螺丝刀;剪切时,就换成剪刀,可以实现多功能的效用。
China Aerospace Science and Technology Corporation Fifth Academy 502 Institutes completed "Maintenance service for in orbit satellites" ground simulation test
In a national astronaut training base in Beijing, a robot with two mechanic arms and various cameras performed a simulated satellite refueling process.
"The two mechanic arms like human hands can connect with a satellite through a gripper on its left hand and refuel the satellite through a fuel nozzle installed on its right hand," said Zhu Zhibin, a robot specialist and developer at China Aerospace Science and Technology Corporation.
Zhu said that the robotic refueling can effectively revive satellites which have gone silent due to fuel exhaustion. But the process is much more complicated in the weightlessness in the outer space.
"First of all, it has to be highly accurate. Current docking of spacecraft is connection of cooperative operation as the targeted spacecraft, such as the orbiting space lab Tiangong, is controllable. But the status control is not available for a silent satellite without fuel. So this kind of docking is more difficult than the one between Tiangong and spacecraft Shenzhou," said Zhu.
According to Zhu, the robot is also designed for other tasks besides refueling satellites.
"It can automatically change tools, like a Swiss Army knife. For example, a screwdriver is available when it needs to turn screws and a scissor is available when the robot needs to cut something. It is multi-functional due to the automatic tool changing," Zhu said.
More->航天科技五院502所“在轨卫星维护服务”地面试验 - China Spaceflight