This is our latest selection of worldwide publications and patents in english on Kinematics, between many scientific online journals, classified and focused on kinematic, relative velocity, relative acceleration, trajectory, trajectories, Chebychev, Kutzbach, free fall, angular velocity, angular acceleration, projectile motion, average velocity and average acceleration.
Quantitative Data to Evaluate Clinical Pilates Efficacy in Chronic Low Back Pain Using Inertial Measurement Units
Published on 2025-04-14 by Nefeli Maria Tsirmpini, Elpida Foti, Athanasios Triantafyllou, Maria Kyriakidou, Panagiotis Gkrilias, Georgios Papagiannis @MDPI
Abstract: Chronic non-specific low back pain (CNLBP) affects a significant percentage of the global population, with therapeutic exercise being a key management strategy. This study evaluated the effectiveness of the clinical Pilates method in 22 patients with CNLBP. Lumbar spine range of motion (ROM) and completion times for three functional tests (prone plank, side bridge, and supine bridge) were measured before and after a six-week rehabilitation program. Motion data were collected using two inertial m[...]
Our summary: Evaluation of clinical Pilates efficacy in chronic low back pain using motion data from inertial measurement units. Statistically significant improvements in kinematic patterns, execution times, and range of motion were observed after a six-week rehabilitation program.
Quantitative Data, Clinical Pilates, Inertial Measurement Units, Chronic Low Back Pain
Publication
Numerical Investigation of the Two-Phase Flow Characteristics of an Axisymmetric Bypass Dual-Throat Nozzle
Published on 2025-03-11 by Xuefeng Xia, Zhensheng Sun, Yu Hu, Hongfu Qiang, Yujie Zhu, Yin Zhang @MDPI
Abstract: The bypass dual-throat nozzle is based on the dual-throat nozzle, which is a fluidic thrust vector nozzle suitable for integration into rocket motors in a symmetrical manner. As the effects of gas–solid two-phase flows are essential for solid rocket motors (SRMs), this study employs the RNG k–ε turbulence model and a particle trajectory model to numerically simulate the three-dimensional flow field inside a fixed-geometry axisymmetric bypass dual-throa[...]
Our summary: Study simulates flow characteristics in bypass dual-throat nozzle using numerical methods. Results show impact of particle size on performance and deposition locations. Introduction of particle phase reduces thrust-vectoring angle and thrust coefficient.
Numerical Investigation, Two-Phase Flow, Axisymmetric Bypass Dual-Throat Nozzle, Turbulence Model
Publication
A Hybrid Propulsion-Based Mission Architecture for the Removal of Debris from Low-Earth Orbit
Published on 2025-03-07 by Sasi Kiran Palateerdham, Abdul Rahman, Emiliano Ortore, Antonella Ingenito @MDPI
Abstract: Satellite technology has advanced with rising demand from the service sector, but increased accessibility also raises risks to the orbital environment. Space debris in low-Earth orbit (LEO) poses a major threat to satellite operations and access to space. Potential solutions for debris removal include using an onboard propulsion module to deorbit a satellite or employing a robotic arm on a “chaser” satellite to capture and remove debris. This study examines active deb[...]
Our summary: Study on removing debris from LEO using a hybrid propulsion-based mission architecture at 2000 km altitude, focusing on a target debris weight of 100 kg and chaser-satellite mass of 100 kg, calculating velocity change and propellant requirements for different trajectories.
Hybrid Propulsion, Debris Removal, Low-Earth Orbit, Satellite Technology
Publication
Dynamics Simulation and Optimization of Gliding Tail Decoy
Published on 2025-03-06 by Huayu Jia, Huilong Zheng, Shunbo Huo, Hong Zhou @MDPI
Abstract: In this paper, a gliding tail decoy for a UAV is proposed, which can be discarded as a decoy when the UAV encounters danger. Based on an aerodynamic model of the tail decoy, a nonlinear dynamics model of the tail decoy gliding in the air is generated, and a three-layer pyramid general design architecture of the tail decoy is established. In order to subsequently analyze the dynamic characteristics and gliding trajectory of the gliding tail decoy, a gliding trajectory simulation software is devel[...]
Our summary: Proposed gliding tail decoy for UAV, developed dynamics model, established design architecture, optimized tail shape for increased gliding distance.
Dynamics Simulation, Optimization, Gliding Tail Decoy, Aerodynamic Model
Publication
Speed–Pressure Compound Control of Thrust System Based on the Adaptive Sliding Mode Control Strategy
Published on 2025-03-06 by Tong Xing, Hong Liu, Zhe Zheng, Lianhui Jia, Lijie Jiang, Guofang Gong, Huayong Yang, Dong Han @MDPI
Abstract: The thrust system, an important subsystem of a tunnel boring machine (TBM), primarily provides thrust force and adjusts TBM’s attitude in real time. In the tunneling process, only controlling the thrust speed causes pressure oscillations, increases soil deformation, and leads to surface subsidence or upheaval. Conversely, solely relying on pressure control causes fluctuations in speed, making it difficult to ensure that the deviation between the designed tunneling axis (DTA) and th[...]
Our summary: The paper proposes a novel adaptive sliding mode control strategy for thrust systems, which combines speed and pressure control to ensure precise trajectory tracking. Simulation experiments show that the ASMC controller significantly improves response speed and stability, outperforming the traditional PID controller.
Speed, Pressure, Compound Control, Adaptive Sliding Mode Control Strategy
Publication
Modular origami shape-morphing soft exoskeletal legged robot
Patent published on the 2025-03-06 in WO under Ref WO2025050021 by THE REGENTS OF THE UNIV OF COLORADO A BODY CORPORATE [US] (Jayaram Kaushik [us], Kabutz Heiko [us])
Abstract: A body compliant quadrupedal micro-robot with four independently actuated leg modules, each having two degrees-of-freedom driven by piezoelectric actuators. The legs are interconnected in a closed kinematic chain via passive body joints enabling passive body compliance and passive adaptation to external constraints. The robot has multiple capabilities including omnidirectionality and confined terrain locomotion. The robot has an unconstrained top speed of approximately three body lengths per sec[...]
Our summary: Body compliant quadrupedal micro-robot with independently actuated leg modules driven by piezoelectric actuators, interconnected in closed kinematic chain for passive body compliance and adaptation to external constraints, capable of omnidirectionality and confined terrain locomotion, with top speed of three body lengths per second and ability to navigate narrow spaces with body compression ratio of up to one-and-a-half times neutral body shape.
Modular origami, shape-morphing, soft exoskeleton, legged robot
Patent
Adaptive fault prediction
Patent published on the 2025-03-06 in WO under Ref WO2025049459 by THE REGENTS OF THE UNIV OF MICHIGAN [US] (Toothman Maxwell [us], Moyne James [us], Tilbury Dawn [us], Barton Kira [us])
Abstract: A state-based framework is the basis for a methodology for predicting faults in industrial equipment or processes during multi-stage degradation. The methodology is based on an object-oriented scheme that allows system experts to identify signal trajectory classes that may occur during degradation. The methodology uses recent observations of a signal feature (x) to estimate the current health stage of a system and extrapolates signal trajectories forward in time to obtain probabilistic fault tim[...]
Our summary: Adaptive fault prediction methodology based on a state-based framework and object-oriented scheme allows system experts to identify signal trajectory classes during degradation, estimate system health stage using recent observations, and extrapolate signal trajectories for probabilistic fault time estimates. The framework incorporates subject matter expertise, reducing the need for historical training data and includes an anomaly detection sub-process for identifying deviations in signal trends.
fault prediction, state-based framework, object-oriented scheme, signal trajectory classes
Patent
Unified boundary machine learning model for autonomous vehicles
Patent published on the 2025-03-06 in WO under Ref WO2025048871 by AURORA OPERATIONS INC [US] (Chaabane Mohamed [us], Kaplan Benjamin [us], Litvin Yevgeni [us], O'hara Stephen [us], Vig Sean [us])
Abstract: A unified boundary machine learning model is capable of processing perception data received from various types of perception sensors on an autonomous vehicle to generate perceived boundaries of various semantic boundary types. Such perceived boundaries may then be used, for example, to control the autonomous vehicle, e.g., by generating a trajectory therefor. In some instances, the various semantic boundary types detectable by a unified boundary machine learning model may include at least a virt[...]
Our summary: Unified boundary machine learning model processes perception data from various sensors on autonomous vehicles to generate perceived boundaries for vehicle control, including virtual construction and other types of boundaries.
machine learning, autonomous vehicles, perception sensors, semantic boundaries
Patent
