Operation Optimization and Control Method Based on Optimal Energy and Hydrogen Consumption for the Fuel Cell/Supercapacitor Hybrid Tram

2021 ◽  
Vol 68 (2) ◽  
pp. 1342-1352
Author(s):  
Yu Yan ◽  
Qi Li ◽  
Wenqiang Huang ◽  
Weirong Chen
Keyword(s):  
Fuel Cell ◽  
Control Method ◽  
Operation Optimization ◽  
Hydrogen Consumption ◽  
Optimal Energy ◽  
Optimization And Control ◽  
And Control

Investigating the dynamic characteristics of the hydrostatic bearing spindle system with active piezoelectric restrictors

2021 ◽  
pp. 1-20
Author(s):  
Yixin Zhang ◽  
Wei Pan ◽  
Shuo Zhan ◽  
Ran Huang ◽  
Shujiang Chen ◽  
...  
Keyword(s):  
Active Control ◽  
Dynamic Characteristics ◽  
Control Method ◽  
Spindle System ◽  
Optimization And Control ◽  
And Control ◽  
Pipeline Model ◽  
Structural Optimization And Control ◽  
Industrial Demand ◽  
Active Control Method

Abstract Studies show that active control technology can improve system performance and meet the increasing industrial demand in diverse applications. In the present study, the dynamic characteristics of the bearing-spindle system based on active piezoelectric (PZT) restrictors, including the amplitude-frequency and phase-frequency characteristics are analyzed theoretically and experimentally. In the analysis, the influence of the pipeline model on the system characteristics is studied. Then the feasibility and effectiveness of the active control method are verified through experiments. It is demonstrated that the theoretical and experimental results are consistent. The present study is expected to provide a guideline for further investigations on the structural optimization and control law design for active hydrostatic oil-film bearing spindle systems.

Nonlinear Thermal Modelling and Control of a PEM Fuel Cell Stack

2005 ◽  
Author(s):  
Jason R. Kolodziej
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Control Method ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Control Technique ◽  
Coolant Temperature ◽  
Fuel Cell Stack ◽  
Nonlinear Control Method ◽  
And Control

The purpose of this paper is to present a nonlinear control method for accurately maintaining coolant temperature within a proton exchange membrane (PEM) fuel cell stack by controlling coolant flow rate. Due to the current sensitive nature of the membrane and a strict relative humidity requirement it is critical to precisely control the internal temperature of the fuel cell. First, an optimization-based parameter identification is applied to determine unknown coefficients to the nonlinear thermal model of the fuel cell stack. The stack is modelled according to a lumped parameter Continuous-flow Stirred Tank Reactor (CSTR) form. The paper then presents a nonlinear disturbance rejection control technique to accomplish the necessary temperature control. Experimental data from a 17-cell fuel cell stack is used for both the modelling and control portions of this work.

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