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相关概念视频

Work Done in an Adiabatic Process01:20

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Consider the adiabatic compression of an ideal gas in the cylinder of an automobile diesel engine. The gasoline vapor is injected into the cylinder of an automobile engine when the piston is in its expanded position. The temperature, pressure, and volume of the resulting gas-air mixture are 20 °C, 1.00 x 105 N/m2, and 240 cm3 , respectively. The mixture is then compressed adiabatically to a volume of 40 cm3. Note that, in the actual operation of an automobile engine, the compression is not...
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The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
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An Otto engine is a four-stroke engine that uses a mixture of gasoline and air as the working fuel. The fuel is injected into the cylinder, and the piston is moved completely down so that the cylinder is at maximum volume. By moving the piston up, adiabatic compression takes place. The spark plug ignites the gasoline-air mixture, and the burning fuel adds heat to the system at a constant volume. The heated mixture expands adiabatically and gets further cooled by exhausting heat, and this cyclic...
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As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
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A Venturi meter is essential for measuring fluid flow rates in pipelines. It utilizes the relationship between fluid velocity and pressure described by Bernoulli's equation. When installed in a sewage system, the Venturi meter accurately determines the wastewater flow rate by measuring pressure differences.
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使用传感器融合的发动机转速回归式发动机气内压力重建.

Runzhe Han1, Christian Bohn2, Georg Bauer2

  • 1College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou 311300, China.

Sensors (Basel, Switzerland)
|August 29, 2024
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概括

这项研究引入了一种新的卡尔曼波器方法,利用合传感器数据重建发动机气压力. 传感器融合提高了准确性,特别是当优先考虑振动信号以更好地优化发动机时.

关键词:
卡尔曼波器可以过.发动机内气压力重建的重建融合传感器 融合传感器 融合传感器虚拟传感感觉的虚拟传感

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科学领域:

  • 机械工程 机械工程
  • 汽车工程 汽车工程
  • 信号处理 信号处理

背景情况:

  • 发动机内气压力对于内部燃烧发动机的优化至关重要.
  • 准确的气压力测量对于性能调整和诊断至关重要.
  • 传统方法可能缺乏精度或依赖侵入性传感器.

研究的目的:

  • 为发动机气压力重建提出一种基于卡尔曼波器的替代递归方法.
  • 利用传感器融合的发动机转速来提高重建的准确性.
  • 通过使用燃烧指标来验证拟议的方法,例如压力峰值 (Pmax) 和峰值位置 (Ploc).

主要方法:

  • 集中式传感器融合技术,合成来自发动机振动和飞轮角速度传感器的数据.
  • 获得合发动机转速作为重建的主要输入.
  • 通过使用化转速对发动机结构振动信号进行逆过来重建发动机气压力.

主要成果:

  • 合发动机转速表现出更好的平滑性,特别是当振动信号加权更高时.
  • 拟议的方法显示,传感器融合速度的准确性与气压力重建质量之间存在直接的相关性.
  • 越来越多地依赖振动信号数据,可以证明更好的重建气压力结果.

结论:

  • 以传感器融合速度的递归卡尔曼波器方法为发动机气压力重建提供了一个可行的替代方案.
  • 传感器融合,特别是优先考虑振动数据,显著提高了重建的气压力的准确性.
  • 这种方法为更精确的发动机优化和性能分析提供了一条途径.