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Machines, Volume 12, Issue 10

October 2024 - 77 articles

Cover Story: Robotic systems are crucial in modern manufacturing, where complex assembly tasks require multi-robot collaboration. In this study, we set up two Franka Panda robots to perform a peg-in-hole insertion task with 1 mm clearance. The control system is hierarchically structured, with feedback-based trajectory planning driven by a reinforcement learning agent. A compliant low-level impedance controller executes these trajectories. To improve training efficiency, we introduce reverse curriculum learning, a novel method for dual-arm assembly tasks, alongside domain randomization to generalize the task's applicability. After testing during the simulation, the trained model is transferred to the real world, resulting in increased robustness to calibration errors compared to classical control methods. View this paper
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Articles (77)

  • Article
  • Open Access
3 Citations
2,374 Views
17 Pages

An Echo State Network-Based Light Framework for Online Anomaly Detection: An Approach to Using AI at the Edge

  • Andrea Bonci,
  • Renat Kermenov,
  • Lorenzo Longarini,
  • Sauro Longhi,
  • Geremia Pompei,
  • Mariorosario Prist and
  • Carlo Verdini

21 October 2024

Production efficiency is used to determine the best conditions for manufacturing goods at the lowest possible unit cost. When achieved, production efficiency leads to increased revenues for the manufacturer, enhanced employee safety, and a satisfied...

  • Article
  • Open Access
1 Citations
2,563 Views
16 Pages

21 October 2024

Motion control is one of the three core modules of autonomous driving, and nonlinear model predictive control (NMPC) has recently attracted widespread attention in the field of motion control. Vehicle dynamics equations, as a widely used model, have...

  • Article
  • Open Access
2 Citations
2,209 Views
16 Pages

Study on the Effect of Cracks in Diaphragm Couplings on the Dynamic Characteristics of Shaft System

  • Meijun Liao,
  • Lan Zhang,
  • Su Nong,
  • Chao Zhang,
  • Rupeng Zhu and
  • Weifang Chen

20 October 2024

Diaphragm couplings are prone to developing diaphragm cracks under prolonged high-speed operating conditions, which can lead to degradation in the performance of the transmission system and affect the dynamics of the shafting system. To investigate t...

  • Article
  • Open Access
2 Citations
1,732 Views
29 Pages

20 October 2024

This paper proposes a new algorithm for the automatic generation of toolpaths for machining complex geometric positions, such as molds used in orthosis production. The production of individualized orthoses often requires the use of multi-axis machini...

  • Review
  • Open Access
6 Citations
4,263 Views
32 Pages

20 October 2024

The technological revolution has transformed the area of labor with reference to automation and robotization in various domains. The employment of robots automates these disciplines, rendering beneficial impacts as robots are cost-effective, reliable...

  • Article
  • Open Access
2 Citations
1,809 Views
19 Pages

20 October 2024

For the safe and efficient use of lithium-ion batteries, the state of charge (SOC) is a particularly important state variable. In this paper, we propose a method for the online estimation of SOC and model parameters based on a fractional-order equiva...

  • Article
  • Open Access
5 Citations
2,621 Views
15 Pages

Analysis of Influential Parameters in the Dynamic Loading and Stability of the Swing Drive in Hydraulic Excavators

  • Vesna Jovanović,
  • Dragoslav Janošević,
  • Dragan Marinković,
  • Nikola Petrović and
  • Radomir Djokić

20 October 2024

The proper design and configuration of the swing drive mechanism of a hydraulic excavator are crucial to improve energy consumption and efficiency and ensure operational stability. This paper analyzes the influence of the relationship between the par...

  • Article
  • Open Access
3 Citations
1,739 Views
39 Pages

Multi-Objective Optimization of an Inertial Wave Energy Converter for Multi-Directional Wave Scatter

  • Fabio Carapellese,
  • Viola De Clerck,
  • Sergej Antonello Sirigu,
  • Giuseppe Giorgi,
  • Mauro Bonfanti,
  • Nicolás Faedo and
  • Ermanno Giorcelli

19 October 2024

To advance wave energy devices towards commercialization, it is essential to optimize their design to enhance system performance. Additionally, a thorough economic evaluation is crucial for making these technologies competitive with other renewable e...

  • Article
  • Open Access
1,236 Views
13 Pages

18 October 2024

In the present work, a parallel continuum manipulator for trunk rehabilitation tasks for patients who have suffered a stroke was analyzed and redesigned. The manipulator had to perform active assistance exercises for the motor recovery of the patient...

  • Article
  • Open Access
1,759 Views
23 Pages

17 October 2024

Errors affect the actual meshing process of gears, alter the actual wear pattern of the tooth profile, and may even impact the overall service life of machinery. While existing research predominantly focuses on individual errors or a narrow set of fa...

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Machines - ISSN 2075-1702