Broadband air clad LP02 mode convertor using tapered mode transition

AbstractThe forward variable area bypass injector (FVABI) is a key component of double bypass variable cycle engine (VCE) to achieve mode transition and bypass ratio adjustment. In this paper, an experimental system for FVABI was constructed based on the analysis of relevant experimental theories, and then the experiments on FVABI were carried out for a specific working state in double bypass mode of VCE and for the comparison working states with different area ratios and different back pressure ratios. The results showed that the FVABI designed in this paper meets the requirements of VCE at this working state. The analysis of the influence of area ratio and back pressure ratio on the injection coefficient showed that the first bypass valve and back pressure were effective means to control the mass flow of FVABI.

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Effect of loading rate on creep behavior and shear transformation zone in amorphous alloy thin films, and its correlation with deformation mode transition

Thin Solid Films ◽

10.1016/j.tsf.2019.04.050 ◽

2019 ◽

Vol 681 ◽

pp. 23-31 ◽

Cited By ~ 1

Author(s):

Q.P. Cao ◽

L.J. Sun ◽

C. Wang ◽

Y. Fu ◽

S.Y. Liu ◽

...

Keyword(s):

Thin Films ◽

Amorphous Alloy ◽

Creep Behavior ◽

Loading Rate ◽

Deformation Mode ◽

Mode Transition ◽

Transformation Zone ◽

Shear Transformation ◽

Shear Transformation Zone

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Temperature dependent load partitioning and slip mode transition in a eutectic AlCoCrFeNi2.1 high entropy alloy

Materialia ◽

10.1016/j.mtla.2021.101118 ◽

2021 ◽

pp. 101118

Author(s):

Nitesh Raj Jaladurgam ◽

Adrianna Lozinko ◽

Sheng Guo ◽

Tung-Lik Lee ◽

Magnus Hörnqvist Colliander

Keyword(s):

High Entropy Alloy ◽

Mode Transition ◽

Slip Mode ◽

Temperature Dependent ◽

High Entropy

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Event Matching Classification Method for Non-Intrusive Load Monitoring

Sustainability ◽

10.3390/su13020693 ◽

2021 ◽

Vol 13 (2) ◽

pp. 693

Author(s):

Elnaz Azizi ◽

Mohammad T. H. Beheshti ◽

Sadegh Bolouki

Keyword(s):

Energy Management ◽

Low Frequency ◽

Training Dataset ◽

Mode Transition ◽

Smart Meters ◽

Available Energy ◽

Consumption Values ◽

Load Monitoring ◽

Transition Times ◽

Event Based

Nowadays, energy management aims to propose different strategies to utilize available energy resources, resulting in sustainability of energy systems and development of smart sustainable cities. As an effective approach toward energy management, non-intrusive load monitoring (NILM), aims to infer the power profiles of appliances from the aggregated power signal via purely analytical methods. Existing NILM methods are susceptible to various issues such as the noise and transient spikes of the power signal, overshoots at the mode transition times, close consumption values by different appliances, and unavailability of a large training dataset. This paper proposes a novel event-based NILM classification algorithm mitigating these issues. The proposed algorithm (i) filters power signals and accurately detects all events; (ii) extracts specific features of appliances, such as operation modes and their respective power intervals, from their power signals in the training dataset; and (iii) labels with high accuracy each detected event of the aggregated signal with an appliance mode transition. The algorithm is validated using REDD with the results showing its effectiveness to accurately disaggregate low-frequency measured data by existing smart meters.

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Control Strategy of Mode Transition with Engine Start in a Plug-in Hybrid Electric Bus

Energies ◽

10.3390/en12152989 ◽

2019 ◽

Vol 12 (15) ◽

pp. 2989 ◽

Cited By ~ 2

Author(s):

Yang ◽

Zhang ◽

Tian ◽

Hu

Keyword(s):

Control Strategy ◽

Transition Process ◽

Structural Features ◽

Driving Performance ◽

The State ◽

Switching Process ◽

Mode Switching ◽

Mode Transition ◽

Power Sources ◽

Hybrid Electric

Torque coordinated control of the relevant power sources has an important impact on the vehicle dynamics and driving performance during the mode transition of the hybrid electric vehicles(HEVs). Considering the dynamic impact problem caused by mode transition, this paper, based upon the structural features of axially paralleled hybrid power system, introduces the bumpless mode switching control theory to analyze multi-mode transition. Firstly, the state transition process is abstracted as the state space transition problem of hybrid system. Secondly the mode transition is divided into four sub-states, and the state model of each sub-state is established. Thirdly, taking the cost functions as the optimization objective, the state switching process is solved, and the control vectors of each switching process are obtained. Simulation and experimental results show that the proposed control strategy can effectively suppress torque fluctuation, avoid longitudinal acceleration impact, and improve driving performance.

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