A fuel cell engine air inlet system control method based on map and linear quadratic type

A linear quadratic, fuel cell technology, used in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as few reports, and achieve the effect of reducing steady-state errors

Inactive Publication Date: 2019-05-28
JILIN UNIV
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Problems solved by technology

A fuel cell engine is a power system that uses hydrogen as fuel. In a fuel cell power system, the intake system plays a vital role in the dynamic and steady-state performance of the engine. However, the current research on the intake system mainly focuses on In the control of peroxygen ratio, the synergistic control of peroxygen ratio and cathode pressure is rarely reported.

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  • A fuel cell engine air inlet system control method based on map and linear quadratic type
  • A fuel cell engine air inlet system control method based on map and linear quadratic type
  • A fuel cell engine air inlet system control method based on map and linear quadratic type

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0044] Step 1. Establish a fuel cell engine intake system model

[0045] Includes air compressor system modeling, intake manifold modeling and cathode modeling. The specific values ​​and constants of the physical parameters in the model are shown in Tables 1 to 3.

[0046] 1) Air compressor system modeling

[0047] The compressor model is divided into two parts, such as figure 1 shown. The first part is a static compressor map which determines the air flow rate through the compressor and then calculates the outlet air temperature using thermodynamic equations. The second part represents the compressor rotation angular velocity ω cp and combined inertia of compressor and motor J cp . The compressor rotational angular velocity and side pressure ratio are used in the compressor map to determine the air ...

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Abstract

The invention belongs to the technical field of engine air inlet systems, and relates to a fuel cell engine air inlet system control method based on map and linear quadratic model. The purpose is to control the peroxy ratio and the cathode pressure of a fuel cell stack, so that the fuel cell engine has good dynamic property and quick response capability. The method comprises the steps of firstly,modeling a fuel cell engine air inlet system; building the models of a compressor, an intake manifold and a stack cathode, secondly, calculating state balance points and steady-state control quantityunder various working conditions, and using linear quadratic form optimal control to design state feedback gain of a model after linearization of the fuel cell engine air inlet system under various working conditions; and finally, calibrating the feed-forward steady-state control quantity and the feedback gain by using the map, and designing a feed-forward and feedback controller. In order to verify the effectiveness of the controller, a simulation model is built in MATLAB/Simulink for verification.

Description

technical field [0001] The invention belongs to the technical field of engine air intake systems, and relates to a control method for fuel cell engine air intake systems based on map and linear quadratic type. Background technique [0002] Over the past 100 years, fossil energy has been widely used in the field of transportation. Nowadays, the automobile industry is booming and has become an indispensable part of people's life. At the same time, the increasing number of automobiles consumes most of the energy. According to the report of the US Energy Information Administration, the energy consumption of the transportation industry The proportion of consumption relative to the total consumption reaches 29%, which is only 3 percentage points less than industrial energy consumption. Along with it, the problem of air pollution caused by exhaust emissions is becoming more and more serious. In order to reduce air pollution and solve the problem of energy shortage, the developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 高金武李蒙胡云峰陈虹
Owner JILIN UNIV
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