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约找到 1273 条结果,耗时 0.303 秒
ABC微型火箭技术-为初学者设计的快速制作技术
點蒼
16年3个月前
回复于
喷气推进
内容:另外如果要搞
二级
火箭能推荐本书学习下吗 [s:94]
发一个单片机驱动多级可控硅的图,顺便问一下大家都是如何驱动的。
yanghaiyi99
11年0个月前
回复于
电磁炮
内容:liunian198 发表于 2013-12-26 10:18 我试过,级数多了很容易误触发或者自动触发,不知什么原因,我用可控硅是40tps12,感觉比70tps16要更容 ...在
二级
管上串个功率电阻消耗反电势应该就不会误触发或者自动触发了吧
没有多猛,效率也没那么高...但算是我正经做的一个
OMEGAERJSH
5年3个月前
回复于
电磁炮
内容:一些试验、进展、过程图好好的四级由于线不够被阉割成了
二级
....而且初级线圈还少了几匝...ZVS焊了两个还把示波器炸了...
固体燃料火箭的姿态控制问题
calvinco
14年6个月前
发表于
喷气推进
内容:3 采用[多级固体燃料火箭]或[固体一级+液体
二级
+.....]的方式的可行性?
新手新制作!呵呵!
cocobettey
14年0个月前
回复于
电磁炮
内容:电容第一级2串3并第
二级
2串2并实际就是1500UF和1000UF了,市电倍压整流就有600多V了。
回 11楼(df21) 的帖子
极度深寒
12年9个月前
回复于
极客DIY
内容:我是认为可以考虑
二级
火箭用的延时电路点火。
特斯拉线圈的原理?
ymt10
17年2个月前
发表于
高电压技术
内容:上面为什么是一个大圆形的管子,中间的
二级
线圈为什么是那么长的柱形。
超导感应电力传动直升机
muqian
12年1个月前
回复于
航空技术
内容:2009年4月1日,邦德近海石油公司的“雷德尔”号直升机就是因为主减速器的
二级
行星轮发生散裂、崩落,瞬间憋爆了主减速器,造成16人全部遇难的惨祸。,主减速器内
二级
行星轮齿轮啮合处的应力载荷极为集中,极高的应力导致了行星轮的崩裂。
怎么才能制造低温液化空气?
RodTech
2年10个月前
回复于
极客DIY
内容:自制不是走的楼上这些
二级
三级路子,而是走空气工质jt膨胀路线,一级完事。
电磁枪重新试验:光电二极管问题
10班陈大葱22号
16年7个月前
发表于
电磁炮
内容:设计中
二级
加速控制是由俩光电二极管控制,以弹体经过俩管所耗的机器周期数来决定何时导通控制
二级
线圈的晶阀管。,但那以前那试验发现个问题,二极管那厮几乎无法检测到子弹的经过(发射电压360v),直到把发射电压降到80v(速度大概1.5m/s)才有反应——
二级
线圈把射出去的子弹又抽了回来,差点打中我...后来查了半导体手册才发现那鸟管子不是二极管而是光电三极管
响应刀兄号召,推进标准化制式化进程
企鹅
11年6个月前
回复于
喷气推进
内容:按照本人的标准允许使用的推进剂中,危险性级别为 第一级:高氯酸盐类推进剂apcp 等第
二级
,制备过程中经常出状况的knsu 第三级,相对安全的推进剂rnx级数越高危险性越低
火箭发失败,堵头爆
飞面教徒
11年11个月前
回复于
喷气推进
内容:大赞,实验了一种稳定的
二级
火箭按图片看这个气动布局很好啊[s:274]堵头我一向宁多勿少,最蛋疼一次堵头比燃料段还长502卫生纸堵头的韧性还不错,可以试试看
二级火箭摄像头视频
口贝
10年6个月前
回复于
喷气推进
内容:暴走的小君哥 发表于 2014-7-8 12:47 楼上的意思是不是
二级
火箭要在一级火箭熄火之前点火,防止推力的变化导致飞行姿态的变化恩,最好这样 姿态一旦变化就没法修补了
猜猜这枚火箭能飞多高
猎鹰
9年11个月前
回复于
喷气推进
内容::大小不错……不是
二级
火箭……从头锥做工看不至于用AP系列,……直径……800到1200米吧。
远程无线点火器-
jrcsh
12年11个月前
回复于
喷气推进
内容:电路还没对电流进行限流, 二极管的型号还没有选定,可以的话会采用,压降 0.7V 以下 或0.2V消特基 电流视点火头要求进行计算和选定
二级
极管的最大电流。
CG实验
MicroSound
10年8个月前
回复于
电磁炮
内容:由于增加到第
二级
威力增加很小,猜测是有反拉,现在正在编写avr测速程序,对avr不熟悉,正在摸索中,希望明天可以做出测速起来,就可以进行后面的实验
谁能帮我计算一下弹丸初始位置?
2949640977
9年2个月前
回复于
电磁炮
内容:这样吧,就按:第一级:线圈长度30mm,线径0.8mm,匝数8*37.5 为300匝;第
二级
;线圈长度35mm,线径0.8mm,匝数8*43.75 为350匝 其它参数均不变(最早的)帮我算下初始位置就好
失败的二级火箭,成功的“标枪”
麒麟
12年8个月前
回复于
喷气推进
内容:导致一级发动机工作完后
二级
没能及时接火工作。
准备做两级加速,先上电路图
ビリビリ女
14年3个月前
回复于
电磁炮
内容:2个串联,2对并联 这样就是900V/2200uF看上去容量可能小了点,但是实际上作为第
二级
的话如果充满了会强很多。
谁能帮我计算一下弹丸初始位置?
22X220
9年2个月前
回复于
电磁炮
内容:引用 2949640977:这样吧,就按:第一级:线圈长度30mm,线径0.8mm,匝数8*37.5 为300匝;第
二级
;线圈长度35mm,线径0.8mm,匝数8*43.75 为350匝 其它参数均不变
多级火箭电子延时点火系统YY中--功能征集中
ltl
13年7个月前
回复于
喷气推进
内容:不要这样延时吧,试试在燃料外侧并联几根细漆包线,靠燃料烧断进行控制,在燃料差不多的时候全部都烧断,然后
二级
点火(可以考虑延时0.5s,一个小电容的事)
回 4楼(七叶枫) 的帖子
彩虹之巅
11年10个月前
回复于
喷气推进
内容:原本想通过加速度计来做
二级
的,结果两次试验下来表明,廉价的加速度计老是抽风,不知道是哪方面的原因。
二级火箭摄像头视频
口贝
10年6个月前
回复于
喷气推进
内容:最好的就是
二级
提前点火
可关断紧密型加速电路草图(SCR)
west_0830
14年11个月前
回复于
电磁炮
内容:我觉的可以使用第
二级
可控硅的导通时同时把输出的经电阻对第一级进行关断。
回 116楼(rb-sama) 的帖子
dr-sama
12年5个月前
回复于
电磁炮
内容:不正常的第
二级
驱动波形。
万户0型二级火箭初步方案(持续更新)
拔刀斋
13年8个月前
回复于
喷气推进
内容:目前尚未定论的是
二级
火箭的气动稳定。,
二级
火箭的气动稳定其实做成“鸭式”也行,只要前翼足够小而且接近气动中心、尾翼足够大而且靠后XXXXXXXXXXXXXXXXXXXXXX/f?
我准备构建一个电子元件参数查询系统
hefanghua
13年1个月前
回复于
电子技术
内容:提供参考的分类:场效应管 IGBT,大功率LED、发光管,
二级
管(不含发光管)、整流桥,光耦,可控硅(晶闸管),三极管集成块的分类太复杂了,一时半会无法分类。
【必读】关于装完Visual Studio学什么的问题
acmilan
9年1个月前
回复于
软件综合
内容:如果一个初学者知道自己想学的是什么(比如要考
二级
c要学vb6或者参加竞赛之类的),直接学就可以了。
科技爱好中等以上事故报告专用帖
meimingzi
6年7个月前
回复于
社区公务
内容:1、事故严重程度:中等2、事故发生的时间:2017年五月,解放大路学校3、事故种类:烧伤4、事故概况描述:塑料瓶倒入酒精后到处,点燃残留酒精欲体会涡喷,被酒精火焰烧到右手,
二级
烧伤5、应急处理情况:及时用冷水清洗
准备做两级加速,先上电路图
1989sean
14年3个月前
回复于
电磁炮
内容:看楼主的电路图,
二级
的确实可以不用单片机的,模电实现应该不复杂.我刚才在百度文库上看到,ST150的响应时间是150us,貌似不够啊.有一点不明,想请问楼主,第一张图中的滤波电容,为什么放在整流桥前面?
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