在高精密機械的領域中，熱變形誤差會對加工精度造成很大的影響。而根據本文實驗所使用的液靜壓軸承系統，熱誤差在所有誤差中佔了很大的比重。因此，本文引入了Okuma公司所提出的熱親和概念，試圖解決熱變形所產生的誤差問題。
在理論方面，本文首先探討液靜壓軸承的理論與設計分析，藉由設計軸承油腔內部壓力與供給壓力之比值，使油膜剛性能達到最大；接著探討在液靜壓軸承系統中，使用定壓之液靜壓雙向墊軸承的承載力，並求出其油膜剛性表現；此外，本文之重點著重於熱親和概念在液靜壓軸承之應用，在液靜壓軸承的溫升過程中，計算其熱源的數值大小，並藉由液靜壓旋轉平台之溫度場分佈，分析出整體結構所產生之熱變形，透過機構上的調整以改善熱變形的問題。
而在實驗規劃的部分，本文使用現有的立式旋轉台進行性能量測與分析，量測在不同油溫與負載的情況下，熱以及結構變形所產生的誤差，與剛性及迴轉精度相比較，並與理論模擬相互驗證；最終，期望能修改機構設計，以提升液靜壓軸承之性能表現。

The thermal error happened in precision machines has a significant impact on machining accuracy. Among error sources of the experiment, this thesis confirmed that thermal error is the key factor affecting the accuracy of the hydrostatic bearing system. Therefore, this study introduces Thermo-Friendly Concept, according to Okuma, to solve the thermal error problem.
In theory, this thesis first probes the function of the load capacity of the opposed pad hydrostatic bearing and the performance of stiffness. Secondly, this work searches the relevant literature to obtain the essential parameters, such as the oil-film thickness, land dimension, and flow rate. Most importantly, this study applies Thermo-Friendly Concept to the design of hydrostatic bearing system. By analyzing the heat sources of bearing system, this work can obtain the image of temperature field, and also receive thermal deformation by thermo-elastic model.
This thesis conducts the experiment by using the existing vertical hydrostatic rotary bearing system. These experimental results compare the actual performance with the theoretical thermo-elastic model, and present a method to modify the model that satisfy the requirements. Finally, this study enhances the performance of hydrostatic bearing system, so better machining accuracy can be expected.

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