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In order to solve the problem that the trajectory is not straight when piecewise polynomial interpolation method is used to plan the trajectory of excavator's linear operation in joint space, which leads to the inaccurate trajectory, this paper proposes a quintic polynomial interpolation method based on multidimensional trajectory to realize the accurate trajectory of excavator's linear operation. While using Matlab to draw the relevant images in motion, ikunc function is used to optimize the inverse solution of each point in the motion process, and joint Angle trajectory smoothing algorithm and particle swarm optimization algorithm are used to verify the minimum change of joint Angle in the optimal inverse solution of ikunc function. It is verified that the ikunc function is correct to obtain the minimum and best inverse solution of the joint Angle change, which indirectly achieves the energy optimal effect.
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针对关节空间中使用分段的多项式插值方法对挖掘机直线作业的运动轨迹进行轨迹规划时,存在轨迹并非直线导致轨迹并不精准的问题,提出一种基于多维轨迹的五次多项式插值方法,实现挖掘机直线作业的精准轨迹。在使用Matlab绘制出运动时相关图像的同时,使用ikunc函数使得运动过程中各点求逆解最优化,并使用关节角度轨迹平滑处理算法和粒子群优化算法,对ikunc函数最优逆解关节角度变化最小进行验证,验证了ikunc函数对关节角度变化量最小、最佳求逆解的正确性,间接地达到了能量最优的效果。
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D-H coordinate system of excavator working device, figureFileSmall=keoxI3oRyC8JzRZbMV0XSQ==, figureFileBig=i7SFVBkUofpLwmBUsqKShg==, tableContent=null), ArticleFig(id=1207748678190731543, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图1, caption=
挖掘机工作装置D-H坐标系, figureFileSmall=keoxI3oRyC8JzRZbMV0XSQ==, figureFileBig=i7SFVBkUofpLwmBUsqKShg==, tableContent=null), ArticleFig(id=1207748678308172061, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.2, caption=
Schematic diagram of boom structure, figureFileSmall=XLu+ssZi2dzPMc7ptcIHbQ==, figureFileBig=lcXcibGlK1Xo45DJxRxX1w==, tableContent=null), ArticleFig(id=1207748678400446752, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图2, caption=
动臂结构, figureFileSmall=XLu+ssZi2dzPMc7ptcIHbQ==, figureFileBig=lcXcibGlK1Xo45DJxRxX1w==, tableContent=null), ArticleFig(id=1207748678492721443, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.3, caption=
Schematic diagram of bucket rod structure, figureFileSmall=5vW0itPRxHsLZGu6hx/uFg==, figureFileBig=qWjUgl74m1SG6uzudKibsQ==, tableContent=null), ArticleFig(id=1207748678614356266, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图3, caption=
斗杆结构, figureFileSmall=5vW0itPRxHsLZGu6hx/uFg==, figureFileBig=qWjUgl74m1SG6uzudKibsQ==, tableContent=null), ArticleFig(id=1207748678706630956, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.4, caption=
Schematic diagram of bucket structure, figureFileSmall=HvwfBf1XiZTT0EsR8eqXaw==, figureFileBig=OGQBLlz8ZZwbVho5ZBF66g==, tableContent=null), ArticleFig(id=1207748678811488560, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图4, caption=
铲斗结构, figureFileSmall=HvwfBf1XiZTT0EsR8eqXaw==, figureFileBig=OGQBLlz8ZZwbVho5ZBF66g==, tableContent=null), ArticleFig(id=1207748678903763254, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.5, caption=
Angle change curve of each joint of excavator, figureFileSmall=e4s8gSGoRlq6cGcSPZG3zw==, figureFileBig=n5tebRnlSB+GqRgWhgDdhA==, tableContent=null), ArticleFig(id=1207748679012815163, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图5, caption=
挖掘机各关节角度变化曲线, figureFileSmall=e4s8gSGoRlq6cGcSPZG3zw==, figureFileBig=n5tebRnlSB+GqRgWhgDdhA==, tableContent=null), ArticleFig(id=1207748679105089853, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.6, caption=
Trajectory of flat land under joint space, figureFileSmall=tHcc24+qYxCE28dsDRXvZg==, figureFileBig=XmUvg3Bc/sRiJfHIoSqYWg==, tableContent=null), ArticleFig(id=1207748679193170244, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图6, caption=
关节空间下平地轨迹, figureFileSmall=tHcc24+qYxCE28dsDRXvZg==, figureFileBig=XmUvg3Bc/sRiJfHIoSqYWg==, tableContent=null), ArticleFig(id=1207748679318999367, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.7, caption=
Flat land trajectory under multidimensional trajectory, figureFileSmall=R8lav5XvJgBQPujOwn3shw==, figureFileBig=SEzhBagbgovBM2RRSgm8ZQ==, tableContent=null), ArticleFig(id=1207748679407079752, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图7, caption=
多维轨迹下的平地轨迹, figureFileSmall=R8lav5XvJgBQPujOwn3shw==, figureFileBig=SEzhBagbgovBM2RRSgm8ZQ==, tableContent=null), ArticleFig(id=1207748679495160140, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.8, caption=
Time change curve of joint angle, figureFileSmall=Ga9CsKh2lcINqCno5+V/wg==, figureFileBig=VE4gtPsW59yQJxreqRdThw==, tableContent=null), ArticleFig(id=1207748679591629139, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图8, caption=
多维轨迹关节角度随时间变化曲线, figureFileSmall=Ga9CsKh2lcINqCno5+V/wg==, figureFileBig=VE4gtPsW59yQJxreqRdThw==, tableContent=null), ArticleFig(id=1207748679675515221, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.9, caption=
Change curve of each hydraulic cylinder, figureFileSmall=dH8u02ZMW6VgO+rCO/tlCQ==, figureFileBig=MvSarXrmQ4mKBdgWg58xCQ==, tableContent=null), ArticleFig(id=1207748679755207002, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图9, caption=
各液压缸变化曲线, figureFileSmall=dH8u02ZMW6VgO+rCO/tlCQ==, figureFileBig=MvSarXrmQ4mKBdgWg58xCQ==, tableContent=null), ArticleFig(id=1207748679847481689, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.10, caption=
Angle change curve before and after optimization, figureFileSmall=SrF3kiMCVMiIcpgrgOJLvQ==, figureFileBig=ueBkopmz4CfFH5R4dX5cDA==, tableContent=null), ArticleFig(id=1207748679914590556, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图10, caption=
优化前后角度变化曲线, figureFileSmall=SrF3kiMCVMiIcpgrgOJLvQ==, figureFileBig=ueBkopmz4CfFH5R4dX5cDA==, tableContent=null), ArticleFig(id=1207748679985893728, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Fig.11, caption=
The angle variation curves before and after particle swarm optimization, figureFileSmall=iuriJ2Jg1Pen/vXAgQMEMw==, figureFileBig=Ilc337tSmkX/xAwOFPa55Q==, tableContent=null), ArticleFig(id=1207748680069779812, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=图11, caption=
粒子群优化前后角度变化曲线, figureFileSmall=iuriJ2Jg1Pen/vXAgQMEMw==, figureFileBig=Ilc337tSmkX/xAwOFPa55Q==, tableContent=null), ArticleFig(id=1207748680145277289, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Tab.1, caption=
D-H parameters of the working device
, figureFileSmall=null, figureFileBig=null, tableContent=
| 第i个关节 | αi-1 | ai | di | θi |
|---|
| 1 | 90° | 0 | 1 | θ1 |
| 2 | 0 | 3.349 | 0 | θ2 |
| 3 | 0 | 2.234 | 0 | θ3 |
| 4 | 0 | 0.75 | 0 | θ4 |
), ArticleFig(id=1207748680224969068, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=表1, caption=
工作装置D-H参数表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 第i个关节 | αi-1 | ai | di | θi |
|---|
| 1 | 90° | 0 | 1 | θ1 |
| 2 | 0 | 3.349 | 0 | θ2 |
| 3 | 0 | 2.234 | 0 | θ3 |
| 4 | 0 | 0.75 | 0 | θ4 |
), ArticleFig(id=1207748680321438064, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Tab.2, caption=
Conversion of coordinates to joint angles
, figureFileSmall=null, figureFileBig=null, tableContent=
| 坐标 | 回转关节角/(°) | 动臂关节角/(°) | 斗杆关节角/(°) | 铲斗关节角/(°) |
|---|
| (5,0,0) | 0 | 22.65 | -73.60 | 2.92 |
| (2,0,0) | 0 | 33.11 | -140.83 | 6.71 |
), ArticleFig(id=1207748680405324145, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=表2, caption=
平地工况坐标与关节角的转换
, figureFileSmall=null, figureFileBig=null, tableContent=
| 坐标 | 回转关节角/(°) | 动臂关节角/(°) | 斗杆关节角/(°) | 铲斗关节角/(°) |
|---|
| (5,0,0) | 0 | 22.65 | -73.60 | 2.92 |
| (2,0,0) | 0 | 33.11 | -140.83 | 6.71 |
), ArticleFig(id=1207748680501793138, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=EN, label=Tab.3, caption=
Upper and lower limits of each joint angle
, figureFileSmall=null, figureFileBig=null, tableContent=
| 关节角度 | θ1 | θ2 | θ3 | θ4 |
|---|
| 上限 | 0 | 90° | 0 | 20° |
| 下限 | 0 | 0 | -144° | -120° |
), ArticleFig(id=1207748681743307125, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658079013937945, language=CN, label=表3, caption=
各关节角度上下限
, figureFileSmall=null, figureFileBig=null, tableContent=
| 关节角度 | θ1 | θ2 | θ3 | θ4 |
|---|
| 上限 | 0 | 90° | 0 | 20° |
| 下限 | 0 | 0 | -144° | -120° |
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