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Machines, Volume 13, Issue 9

September 2025 - 130 articles

Cover Story: The nonlinearity of the damping force in hydro-pneumatic struts necessitates the use of modern controllers instead of classical semi-active control logics. This study presents a semi-active suspension control strategy with a newly introduced gas–oil emulsion strut based on deep reinforcement learning (DRL). The nonlinear pressure-dependent model of semi-active strut is employed in a quarter-car simulation under random road excitation. A DRL-driven controller dynamically adjusts the solenoid valve opening to regulate flow and adapt damping forces in real time, effectively reducing vertical acceleration and velocity. Comparative analyses with both conventional passive and optimally tuned passive systems demonstrate reasonable improvements in ride comfort. View this paper
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Articles (130)

  • Article
  • Open Access
637 Views
19 Pages

22 September 2025

SiCp/Al composites (Silicon Carbide Particle-Reinforced Aluminum Matrix Composites), due to their light weight, high strength, and superior wear resistance, are extensively utilized in aerospace and other sectors; nonetheless, they are susceptible to...

  • Article
  • Open Access
744 Views
19 Pages

21 September 2025

By-pass switches play a crucial role in high-power electrical equipment, where reliable mechanical insertion and stable electrical contact are essential for safety and performance. However, few computational models have been developed to characterize...

  • Article
  • Open Access
545 Views
21 Pages

Study on Corrugated Tube Structure Within the Tempcore Process Based on Large Steel Bar Cooling Efficiency

  • Youhua Li,
  • Kun Li,
  • Qinglong Wang,
  • Guangzhou Wang,
  • Qing Hu,
  • Guoqing Zhang,
  • Wenbo Wang and
  • Hechun Yu

20 September 2025

As a key component of the Tempcore process, the Tempcore cooler plays a critical role in enhancing the cooling efficiency of steel bars. A cylindrical corrugated tube designed specifically for the Tempcore cooling process of large diameter steel bars...

  • Article
  • Open Access
900 Views
23 Pages

Enhancing Human–Machine Collaboration: A Trust-Aware Trajectory Planning Framework for Assistive Aerial Teleoperation

  • Qianzheng Zhuang,
  • Kangjie Huang,
  • Xiaoran Jin,
  • Pengfei Li,
  • Yunbo Zhao and
  • Yu Kang

20 September 2025

Human–machine collaboration in assistive aerial teleoperation is frequently compromised by trust imbalances, which arise from the vehicle’s complex dynamics and the operator’s constrained perceptual feedback. We introduce a novel fr...

  • Article
  • Open Access
808 Views
15 Pages

19 September 2025

With the ongoing advancement of triboelectric nanogenerator (TENG) technology, a novel internal integrated monitoring sensor has been introduced for traditional industrial equipment. A multilayer triboelectric material deep groove ball triboelectric...

  • Article
  • Open Access
1 Citations
568 Views
16 Pages

19 September 2025

The dropper load directly influences the fatigue mechanism of the high-speed catenary system. A proper dropper model for a pantograph–catenary system can be used to accurately and efficiently investigate this phenomenon. In this work, the influ...

  • Article
  • Open Access
766 Views
25 Pages

19 September 2025

In consequent-pole permanent magnet (CPPM) machines, the configuration where PM poles and iron poles are alternately arranged causes distortion in the air-gap magnetic field. This results in significant differences in magnetic circuit characteristics...

  • Article
  • Open Access
1 Citations
517 Views
18 Pages

19 September 2025

A PI control approach grounded in an optimized improved whale algorithm is devised to tackle the characteristics of multivariable, nonlinear, strong coupling, and uncertain and fluctuating wind speeds in electric variable pitch systems. In the improv...

  • Article
  • Open Access
854 Views
40 Pages

18 September 2025

The adaptability of a hexapod robot to complex terrain is highly dependent on its own posture, which directly affects its stability and flexibility. In order to adapt to a change in terrain, it is necessary to adjust posture in real time when walking...

  • Article
  • Open Access
773 Views
22 Pages

18 September 2025

The tolerance of critical components in five-axis machine tools directly impacts the overall machining accuracy of the entire system. This paper presents a tolerance optimization method for machine tools that is grounded in sensitivity theory and the...

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Machines - ISSN 2075-1702