You are currently viewing a new version of our website. To view the old version click .

Machines, Volume 9, Issue 12

December 2021 - 74 articles

Cover Story: Fuel cells are a key technology for low-emission mobility in the future. An electric air compressor—one of the most important system components and the highest parasitic power consumer —is necessary to supply the fuel cell with the required air mass flow at the fuel cell’s operating pressure. Fuel cell air supply systems often combine a compressor with a downstream turbine to recover energy from the fuel cell exhaust gas and thus improve system efficiency. The objectives of current research and this article are to improve the efficiency and extend the operating range of air supply units. For this purpose, an experimentally validated CFD study was performed on an existing air supply system. The features investigated for the compressor diffuser and turbine nozzles significantly improved the performance. View this paper.
  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
  • You may sign up for email alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.

Articles (74)

  • Article
  • Open Access
5 Citations
3,460 Views
26 Pages

A Model-Based and Goal-Oriented Approach for the Conceptual Design of Smart Grid Services

  • Miguel Angel Orellana,
  • Jose Reinaldo Silva and
  • Eduardo L. Pellini

20 December 2021

A solid demand to integrate energy consumption and co-generation emerged worldwide, motivated, on one hand, by the need to diversify and enhance energy supply, and, one the other hand, by the pressure to attend to the requirements of a heterogeneous...

  • Article
  • Open Access
5 Citations
4,294 Views
14 Pages

Event-Triggered Intervention Framework for UAV-UGV Coordination Systems

  • Wu Wang,
  • Junyou Guo,
  • Guoqing Tian,
  • Yutao Chen and
  • Jie Huang

20 December 2021

Air-ground coordination systems are usually composed of unmanned aerial vehicles (UAV) and unmanned ground vehicles (UGV). In such a system, UAVs can utilize their much more perceptive information to plan the path for UGVs. However, the correctness a...

  • Article
  • Open Access
18 Citations
4,394 Views
17 Pages

Data-Driven Models for Gas Turbine Online Diagnosis

  • Iván González Castillo,
  • Igor Loboda and
  • Juan Luis Pérez Ruiz

20 December 2021

The lack of gas turbine field data, especially faulty engine data, and the complexity of fault embedding into gas turbines on test benches cause difficulties in representing healthy and faulty engines in diagnostic algorithms. Instead, different gas...

  • Article
  • Open Access
5 Citations
3,441 Views
20 Pages

Numerical and Experimental Study of Hydraulic Performance and Wear Characteristics of a Slurry Pump

  • Guangjie Peng,
  • Long Tian,
  • Hao Chang,
  • Shiming Hong,
  • Daoxing Ye and
  • Baojian You

20 December 2021

The slurry pump is widely used in ore mining, metal smelting, petrochemical, and other industries, mainly to transport fluid media containing large solid particles. Importantly, it is easy to damage the impeller of a slurry pump in the operation proc...

  • Article
  • Open Access
6 Citations
3,813 Views
21 Pages

20 December 2021

This paper proposes a model-based two-degree-of-freedom (2DOF) speed control for a medium voltage (MV) variable speed drive (VSD) connected to a centrifugal compressor (CC) train. Torsional mode excitations in the drive shaft due to converter switchi...

  • Article
  • Open Access
12 Citations
3,339 Views
13 Pages

Optimizing Main Process Parameters When Conducting Powder-Mixed Electrical Discharge Machining of Hardened 90CrSi

  • Anh-Tuan Nguyen,
  • Xuan-Hung Le,
  • Van-Tung Nguyen,
  • Dang-Phong Phan,
  • Quoc-Hoang Tran,
  • Dinh-Ngoc Nguyen,
  • Manh-Cuong Nguyen and
  • Ngoc-Pi Vu

20 December 2021

In the current study, an optimization process of powder-mixed electrical discharge machining (PMEDM) process when machining cylindrically shaped parts made of hardened 90CrSi steel is reported. In this study, SiC powder was mixed into the Diel MS 700...

  • Review
  • Open Access
50 Citations
7,820 Views
26 Pages

19 December 2021

The aim of manufacturing can be described as achieving the predefined high quality product in a short delivery time and at a competitive cost. However, it is unfortunately quite challenging and often difficult to ensure that certain quality character...

  • Article
  • Open Access
26 Citations
5,449 Views
17 Pages

18 December 2021

To date, several alterations in the gait pattern can be treated through rehabilitative approaches and robot assisted therapy (RAT). Gait data and gait trajectories are essential in specific exoskeleton control strategies. Nevertheless, the scarcity o...

  • Article
  • Open Access
1 Citations
2,984 Views
22 Pages

Motion Planning of Ground Simulator for Space Instable Target Based on Energy Saving

  • Xinlin Bai,
  • Xiwen Li,
  • Zhen Zhao,
  • Mingyi Yang,
  • Zhang Zhang,
  • Zhigang Xu,
  • Mingyang Liu and
  • Qi Xia

18 December 2021

In order to achieve the high-precision motion trajectory in ground experiment of space instable target (SIT) while reducing the energy consumption of the motion simulator, a robot motion planning method based on energy saving is proposed. Observable-...

  • Article
  • Open Access
5 Citations
5,057 Views
21 Pages

17 December 2021

Expert systems are a form of highly understandable artificial intelligence that allow humans to trace the decision-making processes that are used. While they are typically software implemented and use an iterative algorithm for rule-fact network proc...

of 8

Get Alerted

Add your email address to receive forthcoming issues of this journal.

XFacebookLinkedIn
Machines - ISSN 2075-1702