气体系统
浏览关于气体系统建模、控制和仿真的示例。
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气动执行电路
此示例展示了如何使用 Foundation 库气体组件对受控气动作动器进行建模。定向阀是通过 Variable Local Restriction (G) 模块创建的封装子系统，用于对流路的打开和关闭进行建模。双作用作动器是一个通过 Translational Mechanical Converter (G) 模块创建的封装子系统，用于对气体网络和机械平移网络之间的接口进行建模。
Pneumatic Motor Circuit
How a pneumatic vane motor can be modeled using the Simscape™ language. The Pneumatic Motor component is built using the Simscape Foundation gas domain. It inherits from the foundation.gas.two_port_steady base class, which contains common equations that implement the upwind energy flow rate and the gas properties at the ports. The Pneumatic Motor subclass implements equations that describe behaviors specific to the component, such as the motor torque and flow rate characteristics and the mass and energy balance. The Pneumatic Motor block is inserted into the model using the Simscape Component block without the need to generate a separate library.
被阻塞的气体孔口气流
此示例展示了由 Local Restriction (G) 模块建模的气体孔口的阻塞行为。Controlled Reservoir (G) 模块用于设置来自 Reservoir Inputs 子系统的受控压力和温度边界条件，以测试气体孔口。
使用自定义组件的布雷顿循环（燃气涡轮机）
此示例基于布雷顿循环对燃气涡轮机辅助动力装置 (APU) 进行建模。压缩机和涡轮机模块是基于 Simscape™ Foundation Gas 库的自定义组件。系统的功率输入由注入燃烧室的热量表示；实际的燃烧化学没有建模。一个单轴连接压缩机和涡轮机，以便来自涡轮机的动力驱动压缩机。APU 是一种自由涡轮机，可进一步扩大排气流以产生输出功率。
建筑通风
此示例对建筑中的通风回路进行建模。建筑内部的空气体积被划分为四个区域。通风机组将冷空气吹入 Zone 1，并抽出 Zone 3 中的空气。抽出的空气可选择性地循环回 Zone 1。Zone 4 中的门可被打开，将空气排到大气中。
Gamma Stirling Engine
Model a Gamma Stirling engine using gas, thermal, and mechanical Simscape™ components and domains.
Fanno Flow Gas Pipe Validation
The Fanno flow model is an analytical solution of an adiabatic (perfectly insulated) compressible perfect gas flow through a constant area pipe with friction. This example shows a comparison and validation of the Simscape™ Pipe (G) block against the Fanno flow model. While you typically need empirical data to validate a block over a range of scenarios, it may still be useful to perform limited validation against analytical models for specific scenarios. This is because the theory and derivation behind the analytical model may provide more insight into where the block works well and how to address limitations. The comparison shows that, for short to moderate pipe lengths, the Simscape pipe model agrees well with the Fanno flow model. For long pipe lengths, a segmented pipe model agrees well with the Fanno flow model.
Compressor Map with Scattered Lookup
Gas flow through a compressor which is modeled using a simple controlled mass flow rate source. The compressor map that governs this mass flow rate is modeled using the PS Scattered Lookup (2D) block whose data coordinates are the pressure ratio (Pa/Pa) and the engine RPM, and the output is the mass flow rate (kg/s). The scattered lookup block performs delaunay triangulation on the input data (which is shown in plots below), and uses this to interpolate and calculate the mass flow rate based on the input. Scattered lookup allows modeling of the compressor even if the data provided is in an unstructured format.
