掌握被控对象的数学模型和建模后控制系统的设计，是过程控制系统分析、设计、调试和获得较高控制品质的基础和关键。

The math model and control system design after modeling are the base and key point to process control system analyses, design, debug and obtain the higher control quality.

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建立燃气轮机数学模型是船舶动力及其控制系统研制的重要手段，建模的关键在于提高精度和收敛速度。

The mathematic model of gas turbine engine is important for the development of ship power and its control system. The key of modeling is the precision and convergence.

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本文从机理建模入手，应用流体力学理论对双容水箱液位系统进行力学分析，建立非线性数学模型。

By using hydrodynamics theory and method, we can analyze the mechanics principle of two-tank system and establish the system mathematics model.

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