To get started we have a mnemonic that spells actuator.

開始時，我們有一個拼寫執行器的記憶法。

Accuracy defines the closeness to desired position as well as the repeatability possible with the given actuator.

精度是指與所需位置的接近程度，以及使用給定執行器時的可重複性。

Capacity is the loads moments and forces an actuator can bear.

容量是指執行機構可承受的負載力矩和力。

Travel is the stroke needed to traverse the axis.

行程是移動軸所需的衝程。

Usage encompasses duty cycle, dwell time, and expected design life.

使用情況包括工作週期、停留時間和預期設計壽命。

Atmosphere includes details about how dirty or extreme the operating setting will be.

環境包括操作設置有多髒或多極端的詳細信息。

Timing is how soon the machine builder or end-user needs the actuator.

時機是指機器製造商或最終用戶需要執行機構的時間。

Finally, orientation and rates describe the actuators mounting and position in space and relative to the loads as well as the travel speed, accelerations, and other required motion profile features.

最後，方位和速率描述了執行器在空間和相對於負載的安裝和位置，以及移動速度、加速度和其他所需的運動輪廓特徵。

Now let's work through a specific example of sizing a belt-driven actuator with these The first step is to define all application parameters.

現在，讓我們通過一個具體的例子，利用這些參數來確定皮帶驅動推杆的尺寸。

Let's assume we need accuracy to within plus or minus 0.5 millimeters.

假設我們需要正負 0.5 毫米以內的精度。

The actuator in question must bear and transport a payload of 28 kilograms and that payload volume is 25 by 100 by 150 millimeters.

該推杆必須承載和運輸 28 千克的有效載荷，有效載荷體積為 25 x 100 x 150 毫米。

The actuator must move this load over a stroke of 3 meters for more than a million cycles per year. 1,051,200 cycles to be exact.

推杆每年必須在 3 米的行程內移動負載 100 多萬次。確切地說，是 1,051,200 個週期。

The atmosphere requires standard protection and the linear actuator is needed in six weeks.

大氣需要標準保護，線性執行器需要在六週內完成。

It's oriented with its carriage to the side for a type 3 arrangement that's very common to linear motion applications.

它的滑塊朝向側面，採用線性運動應用中非常常見的 3 型佈置。

Also, the actuator must accelerate to 1 meter a second squared to move at 1 meter per second for the majority of its stroke.

此外，推杆必須加速到每秒 1 米的平方，才能在大部分行程中以每秒 1 米的速度移動。

The second step in sizing an actuator is to define forces during regular constant speed operation.

確定推杆尺寸的第二步是確定常規恆速運行時的力。

For this we'll be using our capacity, travel, usage, and speed values to calculate forces in the X, Y, and Z directions as well as moments around the X and Z axes.

為此，我們將使用我們的容量、行程、使用率和速度值來計算 X、Y 和 Z 軸方向上的力以及 X 和 Z 軸周圍的力矩。

Fx is the payload plus the weight of the carriage multiplied by the coefficient of friction from the actuator supplier.

Fx 是有效載荷加上車廂重量乘以推杆供應商提供的摩擦係數。

There's no additional lateral force on the carriage so Fz is zero.

滑塊上沒有額外的橫向力，是以 Fz 為零。

Force in the Y direction is the acceleration due to the force in the Y direction.

Y 方向上的力是 Y 方向上的力所產生的加速度。

The values for moments around the X and Z axis's depend on the amount by which the payload center of gravity is cantilevered off the actuator carriage.

圍繞 X 軸和 Z 軸的力矩值取決於有效載荷重心偏離推杆架的懸臂量。

Now let's work through the third step in sizing an actuator, that is defining forces on the actuator when it's accelerating.

現在，讓我們來完成確定推杆大小的第三步，即定義推杆加速時的受力。

Again, we'll employ capacity, travel, usage, and values to quantify forces and moments.

同樣，我們將利用容量、行程、使用率和數值來量化力和力矩。

Calculation for Fx is the same as before, accounting for G on both the payload and carriage mass, except now we also account for the effects of these two masses on the actuator during acceleration.

Fx 的計算方法與之前相同，都要考慮有效載荷和車廂品質的 G 值，但現在我們還要考慮這兩個品質在加速過程中對推杆的影響。

Notice how Fx here is 35.9 Newtons, Fy is 294 Newtons, and Fz remains zero.

注意這裡的 Fx 是 35.9 牛頓，Fy 是 294 牛頓，而 Fz 仍然為零。

Moment Mx remains the same as well, but moment My is a different story.

力矩 Mx 也保持不變，但力矩 My 則不同。

Here the payload is multiplied by must also account for the effects of actuator acceleration on payload and its gravity center offset from the carriage face in the Y direction.

這裡，有效載荷乘以推杆加速度對有效載荷的影響，以及有效載荷重心在 Y 方向上偏離滑塊面的情況。

Added to that is the product of the payload, G, and the moment arm of the payload center of gravity offset in the X direction from the carriage center.

再加上有效載荷 G 與有效載荷重心在 X 方向偏離滑架中心的力矩臂的乘積。

Step four when sizing an actuator is to obtain an equivalent load or PEQ value published in data sheets to account for all forces and moments during constant speed actuator operation.

確定推杆尺寸的第四步是獲得數據表中公佈的等效負載或 PEQ 值，以考慮推杆恆速運行時的所有力和力矩。

We'll ultimately use this value to calculate the actuator's expected service life.

我們最終將使用該值來計算執行器的預期使用壽命。

We enter our example application values into the PEQ equation for Roland eSmart 80 units.

我們將示例應用值輸入羅蘭 eSmart 80 設備的 PEQ 方程。

Notice how actual application moments divided by maximum values published in the Roland catalog yield safety factors for the moments acting on our example actuator.

請注意，實際應用力矩除以羅蘭產品目錄中公佈的最大值，即可得出作用在我們示例推杆上的力矩的安全係數。

Step five in sizing an actuator is to repeat the process we just executed for constant speed conditions, but now to obtain a PEQ value safety factor for periods of acceleration.

確定推杆尺寸的第五步是重複我們剛才針對勻速條件執行的過程，但現在要獲得加速期間的 PEQ 值安全係數。

With the loads and moments previously calculated along with our chosen actuators capacities, PEQ is 3935 newtons for periods of acceleration.

根據之前計算的載荷和力矩以及我們選擇的推杆容量，加速期的 PEQ 為 3935 牛頓。

Step six in the actuator specification is to calculate the time-based PEQ value that accounts for P1, P2, and P3 representing equivalent payloads at all three portions of the motion profile.

執行器規範中的第六步是計算基於時間的 PEQ 值，該值考慮到 P1、P2 和 P3 在運動曲線的所有三個部分都代表等效有效載荷。

P1 acceleration and P3 deceleration have the same value.

P1 加速度和 P3 減速度的值相同。

This equivalent payload PEQ with a calculated value of 3841.6 newtons is what we'll use for our life equations.

這個等效有效載荷 PEQ 的計算值為 3841.6 牛頓，我們將用它來計算我們的生命方程。

Step seven, the final step in specifying an actuator, is to calculate expected actuator life.

第七步，即指定執行器的最後一步，是計算執行器的預期壽命。

Here we use the dynamic load capacity value published in the Roland catalog for calculating the lifetime of the actuator.

在此，我們使用羅蘭產品目錄中公佈的動態負載能力值來計算執行機構的使用壽命。

This load corresponds to a nominal service life of 100 kilometers.

這一負荷相當於 100 公里的額定使用壽命。

The service factor F sub I accounts for the effects of vibration and shock loading.

使用係數 F sub I 考慮了振動和衝擊載荷的影響。

We chose 1.5 because our design isn't expected to be exposed to such conditions.

我們選擇 1.5，是因為我們的設計預計不會暴露在這樣的條件下。

Actuator life is expressed in both kilometers of carriage travel and years of operation.

執行器壽命以滑塊行程公里數和運行年數表示。

For our design, the Roland actuator we selected will deliver nearly 7.3 years of trouble-free operation.

在我們的設計中，我們選擇的羅蘭推杆可實現近 7.3 年的無故障運行。

As engineers and designers, we know how crucial it is to get the actuator specification right for any given project.

作為工程師和設計師，我們深知在任何項目中正確掌握推杆規格的重要性。

It can be a daunting and time-consuming task, but Roland has simplified this whole process.

這可能是一項艱鉅而耗時的任務，但羅蘭簡化了整個過程。

Just visit my.roland.com and with just a few clicks you can easily size and specify the electric actuators for your design, including customization for specialty applications.

只需訪問 my.roland.com，只需點擊幾下，您就可以輕鬆地為您的設計確定電動執行器的尺寸和規格，包括為特殊應用進行定製。

We also have a team of Roland representatives, distributors, and facilities in your area that are ready to help you every step of the way.

我們還擁有一支由羅蘭代表、經銷商和您所在地區的設施組成的團隊，隨時準備為您提供幫助。

From selecting the right product to installation and support, our team is dedicated to providing you with

從選擇合適的產品到安裝和支持，我們的團隊致力於為您提供