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      저자 : Maolin Cai (검색결과 2 건)
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      • KCI등재

        Dimensionless study on dynamics of pressure controlled mechanical ventilation system

        Yan Shi,Jinglong Niu,Maolin Cai,Weiqing Xu 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.2

        Dynamics of mechanical ventilation system can be referred in pulmonary diagnostics and treatments. In this paper, to convenientlygrasp the essential characteristics of mechanical ventilation system, a dimensionless model of mechanical ventilation system is presented. For the validation of the mathematical model, a prototype mechanical ventilation system of a lung simulator is proposed. Through thesimulation and experimental studies on the dimensionless dynamics of the mechanical ventilation system, firstly, the mathematical modelis proved to be authentic and reliable. Secondly, the dimensionless dynamics of the mechanical ventilation system are obtained. Last, theinfluences of key parameters on the dimensionless dynamics of the mechanical ventilation system are illustrated. The study provides anovel method to study the dynamic of mechanical ventilation system, which can be referred in the respiratory diagnostics and treatment.

      • KCI등재

        Modelling and study on the output flow characteristics of expansion energy used hydropneumatic transformer

        Yan Shi,Tiecheng Wu,Maolin Cai,Chong Liu 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.3

        Hydropneumatic transformer (short for HP transformer) is used to pump pressurized hydraulic oil. Whereas, due to its insufficient usage of energy and low efficiency, a new kind of HP transformer: EEUHP transformer (Expansion energy used hydropneumatic transformer) was proposed. To illustrate the characteristics of the EEUHP transformer, a mathematical model was built. To verify the mathematical model, an experimental prototype was setup and studied. Through simulation and experimental study on the EEUHP transformer, the influence of five key parameters on the output flow of the EEUHP transformer were obtained, and some conclusions can be drawn. Firstly, the mathematical model was proved to be valid. Furthermore, the EEUHP transformer costs fewer of compressed air than the normal HP transformer when the output flow of the two kinds of transformers are almost same. Moreover, with an increase in the output pressure, the output flow decreases sharply. Finally, with an increase in the effective area of hydraulic output port, the output flow increases distinctly. This research can be referred to in the performance and design optimization of the EEUHP transformers.

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