用標準測力儀對電液伺服進行檢定時,其力值誤差為:
表 1試驗機測力系統的各項技術指標
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最大允許值 % |
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試驗機 |
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級別 |
示值相對 |
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示值重復性 |
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示值進回程 |
零點相對 |
相對分 |
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誤 |
差 |
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相對誤差 |
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相對誤差 |
誤 |
差 |
辨力 |
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q |
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b |
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u |
f 0 |
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a |
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0.5 |
±0.5 |
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0.5 |
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±0.75 |
±0.25 |
0.25 |
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1 |
±1.0 |
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1.0 |
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±1.5 |
±0.5 |
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0.5 |
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用同軸度測量儀對電液伺服進行檢定時,其同軸度要求為:
表 2同軸度最大允許值
試驗機級別 |
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0.5 |
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1 |
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同軸度最大允許值 (%) |
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12 |
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15 |
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零點漂移的示值誤差為:
表 3零點漂移允許值
試驗機級別 |
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0.5 |
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1 |
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零點漂移 |
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±0.5 % |
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±1 % |
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5.4 鑒別力閾的技術要求為:不應大于 0.25%FL 。
5.5 變形測量的示值誤差為:
表 4引伸計允許誤差
引伸計 |
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引伸計的最大允許值 |
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級別 |
標距相對誤 |
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分辨力* |
示值誤差* |
進回程相對誤 |
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q le (%) |
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差 |
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相對分辨力 |
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絕對分辨力 |
絕對誤差 |
相對誤差 |
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u e (%) |
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a e (%) |
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r e (μm) |
q a (μm) |
q r (%) |
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0.2 |
±0.2 |
0.10 |
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0.2 |
±0.6 |
±0.2 |
±0.30 |
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0.5 |
±0.5 |
0.25 |
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0.5 |
±1.5 |
±0.5 |
±0.75 |
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1 |
±1.0 |
0.50 |
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1.0 |
±3.0 |
±1.0 |
±1.50 |
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