【菜鳥成長(zhǎng)記】20歲后,，我在機(jī)械的每一天

apmc111

加油，貴在堅(jiān)持，希望你五年后還能來一篇總結(jié)

黑森林的鹿

apmc111 發(fā)表于 2016-3-28 21:05
加油,，貴在堅(jiān)持，希望你五年后還能來一篇總結(jié)

: i) ]4 q4 F' x" l恩恩,，會(huì)一直堅(jiān)持下去的,！感謝關(guān)注！

swj1234

可以

黑森林的鹿

【20160329】VelocityAnalysis
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( D5 Q. G! j6 r3 k% L1 h6 ZVelocity analysis : determination of velocity in a linkage.
速度分析：決定構(gòu)件速度的分析,。
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Two common analysis methods：
$ p& O9 K4 @" t5 {- d+ W" W6 g+ BRelative velocity method
% b! a! D$ B, b6 F" GInstantaneous center method
兩種常用方法：相對(duì)速度法和速度瞬心法,。
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) x. y/ N+ V4 D5 `! U( IRelative velocity: the velocity of one object is related to that of another reference object, which can also be moving.
相對(duì)速度：兩個(gè)均運(yùn)動(dòng)的桿件之間相對(duì)的運(yùn)動(dòng)速度。

4 S* ~7 }0 e0 E$ B1 F" gVA = absolute velocity of point A
VB/A= relative velocity of pointBwith respect to A
相對(duì)速度的一些記法,。

+ O8 R8 w; G1 ^+ X, AInstant center: a instantaneous pivot point about which the particular link instantaneously appears to be in pure rotation.
% n! p/ P8 N/ t6 {% k, H速度瞬心：在運(yùn)動(dòng)的瞬時(shí)可看做是旋轉(zhuǎn)中心的點(diǎn),。
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黑森林的鹿

【20160330】Acceleration Analysis

Tangential acceleration 切向加速度
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8 J! v* P+ d: _- X3 j  D( i% TNormal acceleration 法向加速度
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Total acceleration 和加速度
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3 M4 H9 N- d4 [% nRelative motion: the difference between the motion of two points.
- _- ~3 A- j5 C相對(duì)運(yùn)動(dòng)：兩點(diǎn)運(yùn)動(dòng)的差（矢量）。
Relative acceleration: the acceleration of one object as observed from another reference object that is also moving.
相對(duì)加速度：一點(diǎn)相對(duì)于運(yùn)動(dòng)的另一點(diǎn)的加速度,。

Coriolis Acceleration 科氏加速度

& C5 }0 q9 q7 k/ ~5 p7 r$ R+ qThe magnitude of the Coriolis component:

Both the relative linear velocity and the absolute angular velocity can be determined from a thorough velocity analysis.
計(jì)算科氏加速度的量可以從運(yùn)動(dòng)學(xué)分析中得到,。
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黑森林的鹿

【20160331】Cams: Design and Kinematic Analysis
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+ t$ `  h; p9 g! ^% L# HThe camshaft is driven by the engine.
As the cam rotates, a rocker arm drags on its oblong surface.
' o! Y" ]" L2 u* R- J1 JThe rocker arm imparts a linear, reciprocating motion to a valve stem.
+ i0 h, q9 R' K$ M" o- @3 r+ `The spring is used around the valve stem. The rocker arm follower needs to maintain contact with the cam surface to achieve the desired motion.
發(fā)動(dòng)機(jī)中控制閥門進(jìn)排氣的凸輪。應(yīng)用彈簧使桿件與凸輪保持接觸。

" h9 O( ?1 M& b4 d" T6 ~The unique feature of a cam
Cams can be used to obtain unusual or irregular motion that would be difficult or impossible, to obtain from other linkages, because the motion of cams can be prescribed.
5 z& [( n9 L/ p4 L* \凸輪的特點(diǎn)：凸輪可實(shí)現(xiàn)一般桿件不能或難于實(shí)現(xiàn)的功能,。

however1241

又來看樓主了,，樓主還在更新著。

黑森林的鹿

【20160401】Type of Cams
) H6 I( B( D2 }" x; P. M8 c凸輪分類
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4 R" V; v" B0 [: B0 N; PPlate or disk cams
This type of cam is formed on a disk or plate.
The radial distance from the center of the disk is varied.
% U$ M% B6 z% K平面凸輪：在平面內(nèi)形成的凸輪,，與中心的徑向距離是變化的。

& X7 m/ s, R; ^) E4 G9 XCylindrical or drum cams
) R, H" F. W  Z* c# M  X) [A groove is cut into the cylinder, with a varying location along the axis of rotation.
The follower is attached to the groove, thus giving the follower motion along the axis of rotation.
8 i9 Z- E7 U; q7 U圓柱凸輪：柱體上刻有凹槽,，沿軸向變化分布,，從動(dòng)件被限制在凹槽內(nèi)，因此沿軸向運(yùn)動(dòng),。
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Linear cam
A groove is cut into the block with a distance that varies from the plane of translation.
% Y2 P" n. ]) m9 j' \5 qAttaching a follower in the groove gives the follower motion perpendicular to the plane of translation.
線凸輪：在板內(nèi)刻有線型凹槽,，從動(dòng)件運(yùn)動(dòng)垂直于板的傳動(dòng)方向。

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however1241

however1241 發(fā)表于 2016-4-1 18:18
又來看樓主了,，樓主還在更新著,。

2 B  B5 z/ E* j* k7 V- Z老鷹版主會(huì)鼓勵(lì)吧。
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劉星宇

同大二,，啥專業(yè)基礎(chǔ)課都沒學(xué),，就搞機(jī)械創(chuàng)新，深深體會(huì)到無知,，學(xué)起更有動(dòng)力,、更有興趣，還有,，不帶手機(jī)去上課,，就成功了一半，共勉