Electromechanical actuator fan failure analysis and safety-critical design

Wu, Wei; Lin, Youxi; Chow, L. C.; Gyasi, Edmund; Kizito, John P.; Leland, Quinn

doi:10.1109/maes.2017.150281

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Scaling laws can be used to predict the fan performance under different speeds and ambient pressures [7]. Although fans may not be reliable enough for cooling aircraft EMAs, it was found that using dual-fans can reduce the failure probability in one hour of flight from 10 -5 to 10 -9 without adding heavy weight and high cost [8]. To the best of our knowledge, there are no documented literatures on design of high speed axial fan working effectively at a low pressure environment of 0.2 atm.…”

Section: Hydraulic Losses Estimatementioning

confidence: 99%

Design and Testing of a Cooling Fan for Electro-Mechanical Actuators for Aerospace Applications

Wu¹,

Yr²,

Mesalhy³

et al. 2017

Int J Astronaut Aeronautical Eng

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can remove waste heat from the aircraft EMAs components and transport the heat to the entire bay surfaces. The entire bay surfaces area can act as a heat sink, thus avoiding the need to mount a condenser or cold plate to the bay wall. The EMAs waste heat is generated at the motor, associated control electronics (E-box), gear box, and drive train. The major heat generation source is the motor and it has fins and a cooling fan attached. The fan is structurally integrated with the motor, but is powered and controlled independently with temperature sensors so that the fan is turned on whenever a certain temperature of the actuator is exceeded [2,3]. The drive train and gear box are cooled by recirculating air within the bay. Enclosing the fins with an outer shell creates an annular duct for air to pass through. This way the forced

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Section: Hydraulic Losses Estimatementioning

confidence: 99%

Design and Testing of a Cooling Fan for Electro-Mechanical Actuators for Aerospace Applications

Wu¹,

Yr²,

Mesalhy³

et al. 2017

Int J Astronaut Aeronautical Eng

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“…Most EMA systems are composed of a servo motor, power drive electric circuit, mechanical components, actuator control unit, and certain kinds of sensors [1], as shown in Figure 1. Heat radiators are also equipped on high‐power EMAs [22].…”

Section: Structural Composition Of Emamentioning

confidence: 99%

A review of fault diagnosis, prognosis and health management for aircraft electromechanical actuators

Yin

Chen

et al. 2022

IET Electric Power Appl

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As More/All Electric Aircraft gradually become a research hotspot, electromechanical actuators (EMAs), which can directly convert electrical energy into mechanical energy, have gained more and more attention. However, since the reliability of EMA cannot meet the requirements of actual aircrafts, the practical application of EMA is severely limited. Therefore, fault diagnosis, prognosis and health management (DPHM), which can realise condition‐based maintenance (CBM), has become the key technology in the application of EMA. The aim is to summarise the research on EMA fault modes, fault diagnosis, prognosis and health management systematically and comprehensively. First, the basic structure and common fault modes of EMAs are introduced, and the failure mechanism of EMA is studied. Then, the algorithms of DPHM for EMAs are reviewed in detail. The perception strategies of data acquisition are analysed, and the EMA fault diagnosis methods, including model‐based and data‐driven methods, are reviewed. The research of remaining useful life (RUL) prediction and fault‐tolerant control are introduced. After that, some problems of the existing research on EMA DPHM and their potential solutions are put forward. Finally, several possible developing directions of research on EMA DPHM are predicted.

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“…According to the characteristics that the flight height and ambient temperature of the driving motor change continuously during the whole flight stage, a variable speed fan with wide range of pressure and temperature is designed. 10 Xu et al aimed at the severe heating and special heat dissipation conditions of the permanent magnet motor used in the main wheel of large aircraft, they forced the heat generated by the motor to be cooled by the surrounding air flow driven by the fan. Meanwhile, fins were designed on the stator surface to strengthen convective heat transfer and reduce the temperature of the motor.…”

Section: Introductionmentioning

confidence: 99%

Numerical research on the cooling performance of an aircraft electromechanical actuator based on heat pipes-fuel and heat pipes-ram air cooling conception

Lian

Zhang

Wan

2022

Advances in Mechanical Engineering

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Numerical research is carried out on the cooling performance of an aircraft electromechanical actuator (EMA) using heat pipes. The theoretical model is established to describe the heat transfer processes in the EMA, which is validated by comparing the numerical and experimental results. The heat transfer characteristics of the EMA using two different cooling methods, heat pipes-fuel and heat pipes-ram air, are studied by numerical simulation. For the heat pipes-fuel cooling method, impact of the coolant flow velocity (0–0.015 m/s) on the cooling performance of the EMA is studied, based on which fins are designed on the condenser of heat pipes to improve the cooling performance. The results show that it is an efficient way to cool the electromechanical actuator with heat pipes-fuel cooling method and the heat dissipation rate of the EMA can be improved by 28.8% by using fins. In addition, the heat pipes-ram air cooling method could cool the EMA efficiently with the ram air temperature properly controlled.

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Electromechanical actuator fan failure analysis and safety-critical design

Cited by 10 publications

References 4 publications

Design and Testing of a Cooling Fan for Electro-Mechanical Actuators for Aerospace Applications

Design and Testing of a Cooling Fan for Electro-Mechanical Actuators for Aerospace Applications

A review of fault diagnosis, prognosis and health management for aircraft electromechanical actuators

Numerical research on the cooling performance of an aircraft electromechanical actuator based on heat pipes-fuel and heat pipes-ram air cooling conception

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