亞拓遙控世界討論區
標題: 有大大知道類比和數位伺服器的差異嗎? [打印本頁]
作者: king 時間: 2006-1-24 11:55
如題
開個新話題
作者: 飛影 時間: 2006-1-24 11:57
錢
作者: king 時間: 2006-1-24 11:58
除了價格
以外呢?
它們的原裡是差在哪呢>?
作者: gwagwa 時間: 2006-1-24 12:23
就我所知道
普通類比的伺服機 有訊號的回受 來決定伺服機的角度
如果沒記錯 就是VR的訊號送回伺服機內部的晶片已決定角度是否到了定點
因為這個訊號的回受 很可能會送回接收機 會干擾其他的伺服機
如果是數位式的 接收機送給伺服機的訊號本來就是數位的
伺服機本身根據這個訊號來決定角度 沒有訊號的回受
因此不會干擾其他的伺服機
作者: king 時間: 2006-1-24 12:30
那是不是如果接收器不是數位的
就不可以用數位的伺服器呢?
換句話說
如果接收是數位的
伺服器也不可以用類比的呢?
作者: lingolin 時間: 2006-1-24 12:32
| QUOTE (king @ Jan 24 2006, 12:30 PM) |
那是不是如果接收器不是數位的
就不可以用數位的伺服器呢?
換句話說
如果接收是數位的
伺服器也不可以用類比的呢?
|
好問題
作者: gwagwa
時間: 2006-1-24 12:33
| QUOTE (king @ Jan 24 2006, 01:30 PM) |
那是不是如果接收器不是數位的
就不可以用數位的伺服器呢?
換句話說
如果接收是數位的
伺服器也不可以用類比的呢?
|
接收機沒有差別
他送給伺服機的訊號本來就是數位的
如果是類比的伺服機 內部晶片會將數位訊號轉換的
作者: pico
時間: 2006-1-24 12:36
伺服器的接線還是一樣的
至於說兩種不同的是怎麼運作 是在伺服機內部處理的工作
跟外面是什麼 沒有很大的差別
而用在陀螺後面的 尾伺服機 因為他有很頻繁的左右修正細微動作
陀螺送給伺服機的訊號 可以因為他是數位的伺服機
而有不同的訊號模式 可以突顯數位伺服機的長處 而有更好的表現
然而 這種專門用來驅動數位伺服器的訊號
確有可能會是類比伺服器沒辦法正確解讀的
或是因為超過他驅動的能力 而使得類比伺服器因此而減短壽命
作者: lingolin
時間: 2006-1-24 12:37
| QUOTE (gwagwa @ Jan 24 2006, 12:33 PM) |
| QUOTE (king @ Jan 24 2006, 01:30 PM) | 那是不是如果接收器不是數位的
就不可以用數位的伺服器呢?
換句話說
如果接收是數位的
伺服器也不可以用類比的呢?
|
接收機沒有差別 他送給伺服機的訊號本來就是數位的 如果是類比的伺服機 內部晶片會將數位訊號轉換的 |
那gy401 DS模式
那為什麼類比伺服器會燒掉呢
作者: gwagwa
時間: 2006-1-24 12:38
這裡是詳細的說明
抱歉 我在之前所做的比較 不全然正確
Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
Personally I do think that digis will become far more widespread over the next couple of years, but will not replace the analog servos completely for some years after that.
作者: lingolin
時間: 2006-1-24 12:40
| QUOTE (gwagwa @ Jan 24 2006, 12:38 PM) |
這裡是詳細的說明
抱歉 我在之前所做的比較 不全然正確
Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
Personally I do think that digis will become far more widespread over the next couple of years, but will not replace the analog servos completely for some years after that. |
大大 翻譯翻譯 哈哈哈哈 看無
作者: pico
時間: 2006-1-24 12:50
Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
很多人都認為數位式的會比類比式的強 比較快 但是 講到速度 還有力量還是要取決於他使用的馬達 還有齒輪(任何一顆伺服器也都是這樣)
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
多出來的就是他使用數位式的工作原理. 簡單的來說 數位或是類比 都使用回受訊號 以如願的將伺服器擺臂移動到預期的位置. 不一樣的是數位伺服器的訊號不是1就是0 所以是用全部的力量去轉動, 類比的伺服器卻是利用輸入訊號跟回受訊號比較的差異而有所不同的驅動速度
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
這就是為什麼他的他可以有很好的拉力 和中力點特性由來, 這也就是他的哈姆聲的由來. 他的控制介面的優勢 將會使得伺服器輕易的就能轉動就擺臂,伺服器靠這樣轉動而且用全功率來修正
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
Personally I do think that digis will become far more widespread over the next couple of years, but will not replace the analog servos completely for some years after that.
作者: king
時間: 2006-1-24 13:02
| QUOTE (gwagwa @ Jan 24 2006, 12:38 PM) |
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
|
越看越迷糊
這樣的話
跟訊號好像又沒關係耶
一頭霧水
作者: gwagwa
時間: 2006-1-24 13:04
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
大家來接力
數位伺服機的出力比類比大是因為數位的訊號不是OFF 就是ON 當角度不對時100啪的力量會用來修正
可是類比的是當差越大時 力量才隨著增加
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
這使得數位的有足夠力量維持需求角度的中心點
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
在類比的 適當的出力與阻力平衡時 臏u回到中心點
Personally I do think that digis will become far more widespread over the next couple of years, but will not replace the analog servos completely for some years after that.
他認為數位的會取代類比的
翻的有點粗略
作者: gwagwa
時間: 2006-1-24 13:06
| QUOTE (pico @ Jan 24 2006, 01:50 PM) |
Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
很多人都認為數位式的會比類比式的強 比較快 但是 講到速度 還有力量還是要取決於他使用的馬達 還有齒輪(任何一顆伺服器也都是這樣)
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
多出來的就是他使用數位式的工作原理. 簡單的來說 數位或是類比 都使用回受訊號 以如願的將伺服器臏u移動到預期的位置. 不一樣的是數位伺服器的訊號不是1就是0 所以是用全部的力量去轉動, 類比的伺服器卻是利用輸入訊號跟回受訊號比較的差異而有所不同的驅動速度
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
這就是為什麼他的他可以有很好的拉力 和中力點特性由來, 這也就是他的哈姆聲的由來. 他的控制介面的優勢 將會使得伺服器輕易的就能轉動就擺臂,伺服器靠這樣轉動而且用全功率來修正
|
多謝P大的協助
作者: gwagwa
時間: 2006-1-24 13:09
| QUOTE (king @ Jan 24 2006, 02:02 PM) |
越看越迷糊
這樣的話
跟訊號好像又沒關係耶
一頭霧水
|
這個文章沒提到訊號
如果你用示波器量接收機輸出的訊號 他是數位的 好比步進馬達的訊號
我忘了在哪裡看過 類比伺服機有類比訊號的回受 因此會對其他伺服機干擾
如有誤 請前輩指教歐
作者: lingolin
時間: 2006-1-24 13:10
| QUOTE (gwagwa @ Jan 24 2006, 01:06 PM) |
| QUOTE (pico @ Jan 24 2006, 01:50 PM) | Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
很多人都認為數位式的會比類比式的強 比較快 但是 講到速度 還有力量還是要取決於他使用的馬達 還有齒輪(任何一顆伺服器也都是這樣)
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
多出來的就是他使用數位式的工作原理. 簡單的來說 數位或是類比 都使用回受訊號 以如願的將伺服器臏u移動到預期的位置. 不一樣的是數位伺服器的訊號不是1就是0 所以是用全部的力量去轉動, 類比的伺服器卻是利用輸入訊號跟回受訊號比較的差異而有所不同的驅動速度 |
多謝P大的協助 |
作者: gwagwa
時間: 2006-1-24 13:20
Q. What is the difference between an analog and digital servo?
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
數位的修正頻率是300HZ 類比的只有30HZ
Q. What is servo deadband?
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
伺服機反應角度改變的時間
因此數位的反應時間較快
看來我也想買數位伺服機了
作者: pico
時間: 2006-1-24 13:24
這篇討論下去
數位伺服器會大賣喔
隨便翻翻 不知道有沒有翻錯 加減看
Q. What is the difference between an analog and digital servo?
數位伺服機跟類比伺服機之間有什麼差別
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全功率移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點.
Q. What is servo deadband?
什麼是伺服器的[死點](不知道有沒有現成應對的名詞)
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
[死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us
作者: king
時間: 2006-1-24 13:25
有點概念了
作者: king
時間: 2006-1-24 13:28
| QUOTE (gwagwa @ Jan 24 2006, 01:20 PM) |
Q. What is the difference between an analog and digital servo?
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
數位的修正頻率是300HZ 類比的只有30HZ
Q. What is servo deadband?
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
伺服機反應角度改變的時間
因此數位的反應時間較快
看來我也想買數位伺服機了
|
修正頻率提高了
那馬達修正的速度跟的上嗎?
作者: gwagwa
時間: 2006-1-24 13:29
| QUOTE (pico @ Jan 24 2006, 02:24 PM) |
這篇討論下去
數位伺服器會大賣喔
隨便翻翻 不知道有沒有翻錯 加減看
Q. What is the difference between an analog and digital servo?
數位伺服機跟類比伺服機之間有什麼差別
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全功率移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點.
Q. What is servo deadband?
什麼是伺服器的[死點](不知道有沒有現成應對的名詞)
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
[死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us
|
亞拓數位伺服機?!
作者: pico
時間: 2006-1-24 14:00
亞拓有 hitec 也有 futaba數位伺服器啊
感謝俊哥提供訊息
我也學到很多
作者: lingolin
時間: 2006-1-24 14:14
| QUOTE (gwagwa @ Jan 24 2006, 01:29 PM) |
| QUOTE (pico @ Jan 24 2006, 02:24 PM) | 這篇討論下去
數位伺服器會大賣喔
隨便翻翻 不知道有沒有翻錯 加減看
Q. What is the difference between an analog and digital servo?
數位伺服機跟類比伺服機之間有什麼差別
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全必v移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點.
Q. What is servo deadband?
什麼是伺服器的[死點](不知道有沒有現成應對的名詞)
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
[死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us
|
亞拓數位伺服機?! |
作者: gwagwa
時間: 2006-1-24 14:24
迷你的數位好像不多ㄟ
都是大顆的 TREX裝不下
作者: pico
時間: 2006-1-24 14:26
| QUOTE (gwagwa @ Jan 24 2006, 02:24 PM) |
迷你的數位好像不多ㄟ
都是大顆的 TREX裝不下 |
很多人都用9650掛在尾管上面啊
這是去年八月 funfly比賽的時候拍的 老外的機機
比較大對不對
作者: gwagwa
時間: 2006-1-24 14:35
| QUOTE (pico @ Jan 24 2006, 03:26 PM) |
| QUOTE (gwagwa @ Jan 24 2006, 02:24 PM) | 迷你的數位好像不多ㄟ
都是大顆的 TREX裝不下 |
很多人都用9650掛在尾管上面啊 這是去年八月 funfly比賽的時候拍的 老外的機機 比較大對不對 |
我裝上了 也不輸他
好重的尾巴
作者: pico
時間: 2006-1-24 15:09
http://shop.align.com.tw/product_info....roducts_id=1106這顆不錯用
最近被掃貨掃得兇
尤其是價格漂亮
價格貴一點 品質也好一點
但是不要拿超大顆的來給小暴龍練身體喔
不見得最貴的是最適合的啦
作者: chi
時間: 2006-1-24 15:13
各位大大~~
這裡有篇futaba大略描述數位與標準伺服機的比較
PDF檔 
作者: king
時間: 2006-1-24 16:03
3q大大
講的粉清楚哦
作者: pico
時間: 2006-1-28 23:09
Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo).
很多人都認為數位式的會比類比式的強 比較快 但是 講到速度 還有力量還是要取決於他使用的馬達 還有齒輪齒比數(任何一顆伺服器也都是這樣)
The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases.
增加的速度與力量就是因使用數位式的工作原理. 簡單的來說 數位或是類比 都使用回受訊號 以如願的將伺服器擺臂移動到預期的位置. 不一樣的是數位伺服器的訊號不是1就是0 所以是用全部的力量去轉動, 類比的伺服器卻是利用輸入訊號跟回受訊號比較的差異而有所不同的驅動速度
This gives the digi the holding power and centering that it is known for. It is what also causes the hum that digis are also known for, the weight of the control surface will cause the servo arm to deflect ever so slightly, the servo picks this up deflection, and corrects it with 100% of power.
這就是為什麼數位式可以有很好的拉力 和中力點特性由來. 機身上的控制介面重量會使控制介面稍微下垂, 數位式伺服器感覺到此下垂而使用100%的功率來修正. 這也就是他的哈姆聲的由來.
In an analogue, it will find a happy medium where the force of the deflected contol surface counteracts the correcting force being applied by the servo.
伺服器會在控制介面所產生的力量與伺服器本身的出力之間找到一個綜合點.
Personally I do think that digis will become far more widespread over the next couple of years, but will not replace the analog servos completely for some years after that.
我個人認為數位式將在未來幾年更為普遍. 但在近幾年內不會完全取代analog伺服機.
感謝 steph280 前輩協助翻譯
新年快樂 感謝
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