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WORK ROLL BENDING FORCE COMPENSATION工作辊弯辊力补偿
Positive Bending hydraulic cylinder force does not正弯辊力未使带钢变薄
reduce the strip.PositiveLoadBendingStripTare--Cell=CylinderForceForceForceForcePositive Bending hydraulic cylinders Stretch the Mill Housing正弯辊力使轧机弹跳并改变了and change the shape of the roll gap.辊缝形状 PositiveBendingGapCorrectionFPBHousingModulus=--C*FPB1PB正弯辊力大于平衡力部分
F=Positive Bending Cylinder Force above balancePBC=Positive Bending Coefficient1PB正弯系数
Figure 4 Roll Bending Compensation
弯辊补偿
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User's Guide
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Tension Loss Compensation（失张（厚跃）补偿）
When the strip tails out of the upstream stand, loss of tension and a corresponding increase in gage occurs. The amount of tension loss compensation is a percentage of the calculated strip thickness. For thick strip, the gap is closed to maintain the strip thickness. For lighter gage strip, the roll gap can be opened to prevent tail damage (pinching or tearing). The correction signal is ramped in at an adjustable rate after upstream tension is lost.（当上游机架抛钢后，张力消失并出现厚跃现象。对于这一现象的补偿量应等于所计算带钢厚度的百分数。就厚带钢而言，辊缝应下压以维持带钢厚度不变。就薄带钢而言，辊缝应上抬以防止尾部受损（折皱或撕裂）。一旦上游机架失张，用于修正的斜坡信号（速率可调）就会起作用。）
TENSION LOSS GAP COMPENSATIONhTail gets thickMust close gap to reduceh失张辊缝补偿
尾部变厚必须下压辊缝
timeSTLUpstream StandMIS drop outtime上游机架有钢信号消失
Ramp for hydraulicsSTLmax液压系统斜坡信号
Must close gap to reduce必须下压辊缝减小带钢厚度
STLmaxOpen Gap forThin Productto avoid tail pinch对薄规格应上抬辊缝避免尾部折皱 Close Gap forThick Productto improve performanceh对厚规格应下压辊缝以改善性能 Figure 5 Tension Loss Compensation
失张补偿
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Gagemeter（厚度计（即由LOAD CELL检测出轧制力再算出带钢厚度））
Gagemeter modifies Gap position to maintain a constant delivery strip thickness from each stand. Gagemeter uses the BISRA equation (h = S0 + F/kM, see Figure 6) to estimate stand exit strip thickness. In Figure 6, before metal enters the roll bite the effective roll gap is equal to the setup gap position, S0. When metal enters the roll bite force builds up and the mill stretches causing the effective roll gap to open. In the BISRA equation F/kM is the amount the mill stretches when a roll force is applied. Exit thickness is therefore equal to the unloaded gap position plus the stretch. （厚度计功能修改辊缝位置以保证各机架出口厚度恒定。它使用BISRA等式（h = S0 + F/kM，见图6）预估机架出口带钢厚度。在图6中，咬钢前辊缝等于设定辊缝，S0。咬钢后轧制力增加，轧机弹跳使辊缝变大。在BISRA等式中，F/k M是增加的轧制力引起的轧机弹跳量。因此出口厚度等于无负荷时辊缝值加上弹跳。）
HF/kmS0h = S0 + F/kMH = Entry StripThickness入口厚度 h = Exit Strip Thickness出口厚度 F = Strip Force轧制力
Figure 6 BISRA Equation
S0 = Unloaded Roll GapkM = Mill ModulusF/kM = Mill Stretch无负荷时辊缝 轧机模量 轧机弹跳
The amount of mill stretch is modeled as the sum of Roll Stack Deflection and mill stand Housing Stretch. Stack Deflection is calculated by an offline mechanical model that provides Stack Deflection Modulus values for several
ranges of strip width. Housing Stretch is derived from Mill Modulus Tests (MMT) which measure the total mill stretch with roll on roll for several force levels. The Housing Stretch is calculated from the measured total stretch by subtracting the predicted amount of stack deflection for maximum strip width since the tests are performed with roll on roll. （ 轧机弹跳量为辊子挠度与牌坊弹跳之和。辊子挠度由离线机械模型计算，计算时首先按带钢宽度划分几个范围，然后计算出不同范围的辊子挠度模数。而牌坊弹跳则是来自MMT（轧机模量测试），即让辊子压靠，分别测出不同压力下轧机的弹跳。最终牌坊弹跳等于后者减去前者。应注意减式中辊子挠度是最大带宽时的挠度，因为测试时是两个辊子直接压靠。）
Total Stretch must be zero at the zeroing force. Therefore Housing Stretch is normalized so that there is zero housing stretch at the zeroing force. The amount of Stack Deflection is normalized to zeroing force by subtracting the amount of Stack Deflection at zeroing force for maximum strip width since the mill is zeroed with roll on roll.（在轧制力等于清零（即标定）轧制力力时，总的弹跳必须为零。因此规定轧制力等于清零轧制力时牌坊弹跳为零；辊子挠度（最大带钢宽度时）亦为零。）
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Housing Stretch data is stored as an array of force and stretch values. The amount of stretch between the discrete data points is determined by linear interpolation. Stack Deflection data is stored as an array of Stack Deflection Modulus values and strip width values. Stack Deflection Modulus between data points is also determined by linear interpolation.（轧机弹跳数据以轧制力及相应弹跳值的数组形式储存。在这些离散数据之间的弹跳量采用线性插入法确定。辊组挠度数据存储在辊组挠度模数值及带钢宽度值数组中。在这些辊组挠度模数数据之间的辊组挠度模数值也采用线性插入法确定。）
The Setup Model provides a Roll Stack Deflection Modifier (variable name SKRM, referred to a \
modifier accounts for the differences between the roll diameters and roll material which were used for the offline model and the rolls that are in use.（设定模型提供了一个辊组挠度修改因子（变量名为SKRM，参阅“scram”）。这个修改因子解决了离线模型与实际使用轧辊之间辊径和辊子材质不同的问题。）
SKRM?Work Roll DiameterBackup Roll Diameter??Roll Material Modifier
Base Work Roll DiameterBase Backup Roll DiameterSKRM?工作辊辊径支撑辊辊径??轧辊材质修改因子 基本工作辊辊径基本支撑辊辊径The Total Stretch is calculated as,（总弹跳计算如下，）
????Stack??Stack???????Total??Housing????Strip????????????Deflection?Deflection?SKRM????? ?Stretch??Stretch????Force???????????Modulus??Offset???????????
Where,（这里，）
Housing Stretch is the result linear interpolation into the stored Housing Stretch Curve using Strip Force as the input.
（牌坊弹跳由存储的牌坊弹跳曲线线性插值而得，其输入为轧制力。）
Stack Deflection Modulus is the result of linear interpolation into the stored Stack Deflection Modulus curve using Strip Width as the input.（辊组挠度模数由存储的辊组挠度模数线性插值而得，其输入为带钢宽度。）
Stack Deflection Offset is equal to Zeroing Force times the Stack Deflection Modulus for maximum strip width. （辊组挠度偏置等于清零轧制力乘最大带钢宽度时辊组挠度模数。）
Stretch is calculated for both Drive and Operator sides of the Mill. Separate Drive and Operator Side Housing Stretch curves must be measured. Figure 7 is a block diagram of the Stretch Calculation. Note that Stack Deflection Modulus and Stack Deflection Offset are calculated at a slow rate while the Average and Differential Stretch are calculated at the same rate as the Gap Position Regulator.（弹跳计算同时适用于轧机传动侧及操作侧。传动侧及操作侧牌坊弹跳曲线必须分别测量。图7为弹跳计算框图。注意辊组挠度模数和辊组挠度偏置计算速率较低而传动侧及操作侧弹跳的平均值、差值计算速率则和辊缝位置调节器（Gap Position Regulator）一样。）
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User's Guide
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DriveSideForceDr SideHousingStretchCurveDifferentialHousingStretch
TotalForce*0.5+-DifferentialForce*-Op SideHousingStretchOperatorCurveSideForceAVGAverageHousingStretch+TotalAverageStretchStripWidthStackDeflectionCurve*SKRMStackDeflectionModulus*-StackDeflectionStackDeflectionMaximumCurveStripWidth*ZeroingForce*StackDeflectionOffset
Figure 7 Stretch Calculation
Modes of operation （工作方式）
Gagemeter control provides an absolute and a lockon mode. The mode of control is selected on a mill basis so the gagemeter mode will be the same for each stand. But automatic gage control can be deselected (including gagemeter) on a per stand basis. While the gagemeter equation is used for both modes of operation, the
different modes determine how the reference is generated and the turn on time of the function. (厚度计AGC控制有绝对方式和锁定方式。由于方式的选择以整个轧线为基础，因此各机架所选方式要一致。但对单个机架而言，可以不选择自动厚度控制（AGC）（包括厚度计AGC）。当厚度计AGC公式同时用于两种工作方式时，将无法确定各自的基准值和启动时间。)
Lockon Mode（锁定方式）
Lockon gagemeter develops its reference at the head end of the bar based on current feedback. Lockon will wait a time delay in milliseconds after metal enters the stand before turning on. When it does turn on it will use the current feedback as it's stretch reference. Typically the time delay is approximately one second, but must be long enough to allow head end transients to settle.（锁定方式的基准值来自于对当前带钢头部测量的反馈值。机架咬钢后延时若干毫秒锁定方式才会启动。启动后它将把当前反馈值作为自己的弹跳基准值。一般延时时间约1秒钟，但必须以保证带钢头部有足够的时间过渡到稳定状态为前提。）
Absolute Mode（绝对方式）
The Absolute gagemeter reference is sent from the Finish Mill Setup model. Absolute will wait a time delay in milliseconds after metal enters the stand before turning on. Typically this time delay is approximately 300 milliseconds. The instant before absolute gagemeter turns on it will compare its
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Hot Mill Automatic Gage Control
User's Guide
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