private static decimal GetLineError(decimal vMax, decimal vMin, TestPoint point, int count)
{
var idealV = Math.Round(((vMax - vMin) / (count - 1)) * point.Index + vMin, 2);
if (idealV <= 0.001m)
{
idealV = 0.001m;
}
return(((point.ActualV / idealV) - 1) * 100);
}
/// <summary>
/// 获取相对的数据
/// </summary>
/// <param name="dataList"></param>
/// <returns></returns>
public static List <TestPoint> GetRelativePoints(List <TestPoint> dataList)
{
List <TestPoint> newDataList = new List <TestPoint>();
foreach (var testPoint in dataList)
{
var data = new TestPoint();
data.UpperV = Math.Abs(testPoint.UpperV - 5);
data.ActualV = Math.Abs(testPoint.ActualV - 5);
data.DownV = Math.Abs(testPoint.DownV - 5);
data.IdealV = Math.Abs(testPoint.IdealV - 5);
newDataList.Add(data);
}
return(newDataList);
}
public static List <TestPoint> GetTestPointList(List <decimal> vList, decimal downAngle, decimal upperAngle,
decimal error, decimal vMax, decimal vMin, decimal upError, decimal downError)
{
if (vList.Count < 2)
{
throw new Exception("测试点数最少为2");
}
//采集点之间的角度间隔
var slopeAngle = (upperAngle - downAngle) / (vList.Count - 1);
//采集点之间的电压差
var slopeV1 = (vMax - vMin) / (vList.Count - 1);
//角度一直的电压差
var slopeV = ((decimal)(vMax - vMin)) / (upperAngle - downAngle);
List <TestPoint> list = new List <TestPoint>();
var angleBegin = downAngle;
var dataIndex = 0;
foreach (decimal item in vList)
{
var point = new TestPoint()
{
Angle = Math.Round(angleBegin, 2),
//实际采集值
ActualV = item,
//理论采集值
IdealV = vMin,
//采集上限
//序号
Index = dataIndex++
};
//理想电压
point.IdealV = Math.Round(vMin + slopeV1 * point.Index, 2);
//上限电压
point.UpperV = GetValue(vMin, slopeV1, upError / 100m, point.Index);
//下线电压
point.DownV = GetValue(vMin, slopeV1, -1 * (downError / 100m), point.Index);
list.Add(point);
angleBegin += slopeAngle;
}
return(list);
}
/// <summary>
/// 查找最大的误差数据
/// </summary>
/// <param name="list"></param>
public static void FindMaxErrorData(List <TestPoint> list)
{
decimal interval = 0;
TestPoint maxErrorData = null;
foreach (var testPoint in list)
{
if (Math.Abs(testPoint.ActualV - testPoint.IdealV) > interval)
{
interval = Math.Abs(testPoint.ActualV - testPoint.IdealV);
maxErrorData = testPoint;
}
}
//如果找到了误差最大的数据,就记性标记
if (null != maxErrorData)
{
maxErrorData.IsMaxError = false;
}
}