用VBA编制的导杆运动模拟程序

该怎么办呢难哦 发表于 2004-3-15 12:13:00

这里公布我做的程序中的一部分，参数设置时注意两者关联。要想看得逼真一点，事先将CAD着色。

想搞机械二次开发的可以看看。

Option Explicit

 Public l1, l4, l3, lll3, aa, aaa As Double Public 滑块长, 滑块宽, 铰半径 As Double Public xa, ya As Double Public xb(360) As Double Public yb(360) As Double Public ll3(360) As Double Public bb(360) As Double

Public xcmax, xcmin, vmax, vmin As Double Public Const pi As Double = 3.1415926 Public i As Double Public 曲柄 As Acad3DSolid Public 导杆 As Acad3DSolid Public 铰链1 As Acad3DSolid Public 铰链2 As Acad3DSolid Public 铰链3 As Acad3DSolid Public 滑块 As Acad3DSolid Public 机架1 As Acad3DSolid Public 机架2 As Acad3DSolid Public Sub 计算() Dim w1 As Double Dim tem(360) As Double Dim du As Double lll3 = Sqr(l4 ^ 2 - l1 ^ 2) aa = Atn(lll3 / l1) aaa = 3 / 2 * pi + aa l3 = 1.2 * (l4 + l1)

For i = 0 To 360 du = i * pi / 180 + aaa xb(i) = l1 * Cos(du) yb(i) = l1 * Sin(du) tem(i) = l1 ^ 2 + l4 ^ 2 - 2 * l1 * l4 * Cos(du) ll3(i) = Sqr(tem(i)) bb(i) = Atn(l1 * Cos(du) / (l4 + l1 * Sin(du))) Next i

滑块长 = l1 / 4 滑块宽 = l1 / 6 铰半径 = l1 / 30

End Sub

Public Sub 生成三维模型()

Dim center1(0 To 2) As Double Dim center2(0 To 2) As Double Dim center3(0 To 2) As Double Dim centertem(0 To 2) As Double Dim rotatept1(0 To 2) As Double Dim rotatept2(0 To 2) As Double Dim rotateangle As Double Dim radius As Double Dim rottem As Double

radius = 铰半径 / 2 center1(0) = 0: center1(1) = 0: center1(2) = 0 center2(0) = xb(0): center2(1) = yb(0): center2(2) = 0 center3(0) = 0: center3(1) = -l4: center3(2) = 0

Set 曲柄 = ThisDrawing.ModelSpace.AddCylinder(center1, radius, l1) Set 导杆 = ThisDrawing.ModelSpace.AddCylinder(center3, radius, l3) Set 铰链1 = ThisDrawing.ModelSpace.AddSphere(center1, 铰半径) Set 铰链2 = ThisDrawing.ModelSpace.AddCylinder(center2, 铰半径, 滑块宽 * 1.2) Set 铰链3 = ThisDrawing.ModelSpace.AddSphere(center3, 铰半径) Set 滑块 = ThisDrawing.ModelSpace.AddBox(center2, 滑块长, 滑块宽, 滑块宽) Set 机架1 = ThisDrawing.ModelSpace.AddCone(center1, 铰半径 * 3, 铰半径 * 5) Set 机架2 = ThisDrawing.ModelSpace.AddCone(center3, 铰半径 * 3, 铰半径 * 5)

 rotatept1(0) = 0: rotatept1(1) = 0: rotatept1(2) = 0 rotatept2(0) = 0: rotatept2(1) = 1: rotatept2(2) = 0 rotateangle = 90 * pi / 180

曲柄.Rotate3D rotatept1, rotatept2, rotateangle centertem(0) = l1 / 2: centertem(1) = 0: centertem(2) = 0 曲柄.Move center1, centertem 曲柄.Rotate center1, aaa

滑块.Rotate center2, aa

导杆.Rotate3D rotatept1, rotatept2, rotateangle centertem(0) = l3 / 2: centertem(1) = -l4: centertem(2) = 0

导杆.Move center3, centertem 导杆.Rotate center3, aa

rotatept2(0) = 1: rotatept2(1) = 0: rotatept2(2) = 0 centertem(0) = 0: centertem(1) = -铰半径 * 2: centertem(2) = 0 机架1.Rotate3D rotatept1, rotatept2, -rotateangle 机架1.Move center1, centertem

rotatept1(0) = 0: rotatept1(1) = -l4: rotatept1(2) = 0 rotatept2(0) = 1: rotatept2(1) = -l4: rotatept2(2) = 0 centertem(0) = 0: centertem(1) = -l4 - 铰半径 * 2: centertem(2) = 0 机架2.Rotate3D rotatept1, rotatept2, -rotateangle 机架2.Move center3, centertem

曲柄.Color = acRed 导杆.Color = acRed 铰链1.Color = acBlue 铰链2.Color = acBlue 铰链3.Color = acBlue 滑块.Color = acRed 机架1.Color = acGreen 机架2.Color = acGreen

Dim NewDirection(0 To 2) As Double NewDirection(0) = -1: NewDirection(1) = -1: NewDirection(2) = 1 ThisDrawing.ActiveViewport.Direction = NewDirection ThisDrawing.ActiveViewport = ThisDrawing.ActiveViewport ZoomAll

End Sub

 Public Sub 三维动画(ByVal i As Single) Dim centertem(0 To 2) As Double Dim centertemf(0 To 2) As Double Dim centerteml(0 To 2) As Double Dim rottem As Double Static lastt As Double

centertem(0) = 0: centertem(1) = 0: centertem(2) = 0 曲柄.Rotate centertem, pi / 180

centertemf(0) = xb(lastt): centertemf(1) = yb(lastt): centertemf(2) = 0 centerteml(0) = xb(i): centerteml(1) = yb(i): centerteml(2) = 0 铰链2.Move centertemf, centerteml

centertemf(0) = 0: centertemf(1) = -l4: centertemf(2) = 0 rottem = bb(lastt) - bb(i) 导杆.Rotate centertemf, rottem

centertemf(0) = xb(lastt): centertemf(1) = yb(lastt): centertemf(2) = 0 centerteml(0) = xb(i): centerteml(1) = yb(i): centerteml(2) = 0 滑块.Move centertemf, centerteml rottem = bb(lastt) - bb(i) 滑块.Rotate centerteml, rottem

 曲柄.Update 铰链2.Update 滑块.Update 导杆.Update lastt = i End Sub

Public Sub main() UserForm1.Show End Sub

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用VBA编制的导杆运动模拟程序