A Novel Electro Hydrostatic Actuator System With Energy Recovery Module for More Electric Aircraft

Li, Xiaobin; Qian, Hao; Wu, Shuai; Pan, Qingxin; Huang, Ligang; Zongxia, Jiao

doi:10.1109/tie.2019.2905834

Cited by 57 publications

(35 citation statements)

References 21 publications

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“…Electro-hydrostatic actuator (EHA) is considered a good solution in a wide range of industrial applications such as spacecraft [1], aircraft [2], robotics [3][4][5][6], vehicles [7], and heavy-duty suspension [8]. As a highly integrated power transmission system, EHA outperforms traditional hydraulic systems by decreasing the weight and increasing the working efficiency [9]. Typically, an electro-hydrostatic actuator (EHA) is a self-contained, pump-controlled system that is composed of a motor, a pump, a supercharged fuel tank, and a hydraulic cylinder (for simplification, the "hydraulic cylinder" is referred to as a "cylinder" in the rest of the paper) [10].…”

Section: Introductionmentioning

confidence: 99%

A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

Wang

Yang

et al. 2020

Actuators

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Electro-hydrostatic actuator (EHA) has significance in a variety of industrial tasks. For the purpose of elevating the working performance, we put forward a sliding mode control strategy for EHA operation with a damping variable sliding surface. To start with, a novel sliding mode controller and an extended state observer (ESO) are established to perform the proposed control strategy. Furthermore, based on the modeling of the EHA, simulations are carried out to analyze the working properties of the controller. More importantly, experiments are conducted for performance evaluation based on the simulation results. In comparison to the widely used control strategies, the experimental results establish strong evidence of both overshoot suppression and system rapidity.

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Section: Introductionmentioning

confidence: 99%

A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

Wang

Yang

et al. 2020

Actuators

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“…Moreover, when the separation distance d between the reference surface and the smooth surface is less than the asperity height z, the asperities with the original height greater than d will form conductive spots. Therefore, for any given asperity, the probability of the formation of a conductive spot can calculated by (1), where is the probability density function of the height distribution.…”

Section: A Microscopic Electrical Contact Modelmentioning

confidence: 99%

“…As critical devices, high-power DC contactors are essential for the induction, sustenance, and breaking of electrical circuits, with the exception of short circuit currents. Hence, their breaking characteristics have a significant influence on the system performance [1]- [4]. Several professional electrical manufacturing companies recently developed high-power DC contactor products, which operate at voltages of up to 1800 V and are therefore suitable for aerospace and military applications.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Experimental Research on a Novel Multi-Contact MVDC Natural Current Commutation Breaking Topology

Jia

Xia

et al. 2020

IEEE Access

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The high performance of medium-voltage direct current (MVDC) power supply system is a prerequisite for several industrial applications. To meet the higher voltage direct current (DC) breaking requirements in the fields of aviation, aerospace, and new energy, this paper proposes a novel MVDC commutation breaking topology that combines a load-carrying branch and an arcing branch in parallel. In contrast to the conventional structure based on semiconductor devices, each branch in the proposed topology contains a mechanical contact, which provides a lower on-state loss and higher voltage-breaking capacity. Moreover, the theoretical analysis and experimental results verified the asynchronous operation of the current-loading and confirmed that the arcing branch can realize the natural commutation of the current for the breaking of overload current or short-circuit current. A detailed equivalent model that combines the micro-electrical contact theory and phase-change characteristics of the electrode material was then established to investigate the molten metal bridge and pseudo arc phenomenon of the contact area during the commutation process. The results indicated that although the presence of a molten metal bridge and pseudo arc increase the current commutation time and erosion of the electrode material, the commutation process can be conducted. Finally, based on the softening voltage of the electrode material under the rated conditions, in addition to the phase change during dynamic commutation, the roughness σ and elastic modulus E can be adjusted appropriately to achieve arc-less current commutation.

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“…Therefore, the thermal design for the motor in the EHA system becomes increasingly significant. Forced convection heat transfer and active load sensitive configuration are useful measures to solve thermal problems [7,8], and one of the feasible ways is to use the leakage oil from the hydraulic pump to cool the high-speed motor [9]. The air gap separating the rotor from the stator will be flooded with oil.…”

Section: Introductionmentioning

confidence: 99%

“…J. Saari made a comprehensive analysis of the viscous loss of the motor, and the theoretical formulas for calculating the viscous loss under different flow conditions were proposed [20]. The dimensionless parameters in the equations were difficult to determine, and the Forced convection heat transfer and active load sensitive configuration are useful measures to solve thermal problems [7,8], and one of the feasible ways is to use the leakage oil from the hydraulic pump to cool the high-speed motor [9]. The air gap separating the rotor from the stator will be flooded with oil.…”

Section: Introductionmentioning

confidence: 99%

Viscous Loss Analysis of the Flooded Electro-Hydrostatic Actuator Motor under Laminar and Turbulent Flow States

Zongxia

Tian

2020

Processes

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The electro-hydrostatic actuator (EHA) is one of the most prevalent types of power-by-wire (PBW) actuation systems. With the increase in EHA power density, using the pump’s leakage oil to cool the motor has been gradually adopted to solve the problem of excessive motor temperature. However, the viscous friction loss caused by the liquid viscosity will seriously affect the heat dissipation effect and dynamic performance of the motor. To calculate the motor viscosity loss accurately, a novel calculation method is proposed in this paper. Using the energy gradient theory, the relationship between the fluid flow state and the rotation speed is analyzed. In addition, the lumped parameter model of viscous loss is established by using the conservation of momentum theory and computational fluid dynamics (CFD) simulation. A test rig is designed to test the viscous friction loss for various rotation speeds, and the test results show a good agreement with the theoretical analysis. The present results demonstrate the effectiveness of the lumped parameter model and provide a better calculation method for wet motor viscosity loss calculation.

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A Novel Electro Hydrostatic Actuator System With Energy Recovery Module for More Electric Aircraft

Cited by 57 publications

References 21 publications

A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

Analysis and Experimental Research on a Novel Multi-Contact MVDC Natural Current Commutation Breaking Topology

Viscous Loss Analysis of the Flooded Electro-Hydrostatic Actuator Motor under Laminar and Turbulent Flow States

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