A5045660554- Robotic Path Planning Algorithms
- Gear and Bearing Dynamics Analysis
- Robotic Mechanisms and Dynamics
- Topic Modeling
- Natural Language Processing Techniques
- Iterative Learning Control Systems
- Advanced Sensor and Control Systems
- Metaheuristic Optimization Algorithms Research
- Piezoelectric Actuators and Control
- Vehicle Routing Optimization Methods
- Manufacturing Process and Optimization
- Mechanical Engineering and Vibrations Research
- Expert finding and Q&A systems
- Tribology and Lubrication Engineering
- Medical Imaging Techniques and Applications
- 3D Surveying and Cultural Heritage
- Control Systems and Identification
- Robot Manipulation and Learning
- Nonlinear Partial Differential Equations
- Stability and Controllability of Differential Equations
- Control and Dynamics of Mobile Robots
- Stability and Control of Uncertain Systems
- Text and Document Classification Technologies
- Mechanical stress and fatigue analysis
- Sensorless Control of Electric Motors
Lanzhou University of Technology
2014-2025
Central South University
2024
Shanghai Aerospace Automobile Electromechanical (China)
2024
Sichuan University
2014-2021
Huawei Technologies (China)
2021
South China University of Technology
2013-2017
Jilin University
2017
State Key Laboratory of Automotive Simulation and Control
2017
IBM (Canada)
2004
A novel method called Real Tooth Contact Analysis (RTCA) is proposed to elucidate the tooth-face contact law of cylindrical gear with variable hyperbolic circular-arc-tooth-trace (VH-CATT gears) and predict direction size pattern. This study establishes a coating surface model for tooth coated red lead powder specific thickness, analysis considering installation errors. Utilizing three-dimensional complete mathematical TCA technology, an algorithm based on intersection principle devised...
Coverage path planning on a complex free-form surface is representative problem that has been steadily investigated in and automatic control. However, most methods do not consider many optimisation conditions cannot deal with surfaces, closed the intersection of multiple surfaces. In this study, novel efficient coverage path-planning method proposed considers trajectory information uses point cloud data for environmental modelling. First, are denoised simplified. Then, points converted into...
Jiawei Zhou, Xiaoguang Li, Lifeng Shang, Lan Luo, Ke Zhan, Enrui Hu, Xinyu Zhang, Hao Jiang, Zhao Cao, Fan Yu, Xin Qun Liu, Lei Chen. Proceedings of the 60th Annual Meeting Association for Computational Linguistics (Volume 1: Long Papers). 2022.
Trajectory planning is a crucial step in controlling robot motion. The efficiency and accuracy of trajectory directly impact the real-time control robot’s mapped to joint space, mathematical model established meet physical constraints during motion avoid coupling problems. To enhance convergence speed local optima, an improved quantum particle swarm optimization algorithm proposed applied solve planning. space then tested based on algorithm. results demonstrate that this method can replace...
The kinematics of a robotic manipulator is critical to the real-time performance and robustness robot control system. This paper proposes surrogate model inverse for serial six-degree freedom (6-DOF) manipulator, based on its symmetry. Herein, derived via training Vector-Quantified Temporal Associative Memory (VQTAM) network, which originates from Self-Organized Mapping (SOM). During processes training, testing, estimating this neural priority K-means tree search algorithm utilized, thus...
Wear is the main failure form of gear transmission interface, runs through whole life cycle service, and distributed error tooth surface due to introduced assembly will make actual meshing state different from ideal state, thus affecting wear trajectory state. Therefore, considering coupling relationship between contact analysis, variation laws amount interface variable hyperbolic circular-arc-tooth-trace cylindrical were studied under consideration in this article. Based on analysis method...
Currently, the most popular method for open-domain Question Answering (QA) adopts "Retriever and Reader" pipeline, where retriever extracts a list of candidate documents from large set followed by ranker to rank relevant reader answer candidates. Existing studies take greedy strategy in sense that they only use samples ranking at current hop, ignore global information across whole documents. In this paper, we propose purely rank-based framework Thinking Path Re-Ranker (TPRR), which is...
an improved Ant colony optimization algorithm (PM-ACO for short) is proposed to solve the robot path planning problem. In PM-ACO, ants deposit pheromone on nodes but not arcs, resulting in that trails of become form marks, which consist a series points. After ant colony’s tours, iteration-best strategy combined with r-best rule update nodes’ pheromone. The stability PM-ACO analyzed and some advancement improve performance. Because several arcs integrated into one node, rapid accumulation...
4SPRR-SPR parallel robot is a novel closed-loop mechanism. The research of kinematics the basis real-time and robust control. This paper aims to proposing method address surrogate model forward for PMs (Parallel Mechanisms). Herein, derived by training VQTAM (Vector-Quantified Temporal Associative Memory) network, which originates from SOM (Self-Organized Mapping). During processes training, testing estimating this neural priority K-means tree search algorithm utilized, thus improving...
Nowadays, multi-hop question answer (QA) problem is challenging and not well solved in the QA community. The dominant bottleneck of need for a reasoning retriever to fetch document path from an open-domain corpus (e.g., Wikipedia). A aims collect evidence large corpora at one hop retrieval aggregate subsequent retrieval, which yields after retrieval. There exist two challenges, (1) efficient explainable way (2) update information by aggregating retrieved each To address these we propose...
To illustrate the impact of tooth surface wear on dynamic response cylindrical gear transmission system with variable hyperboloid circular-arc-tooth-trace (VH-CATT), a nonlinear model VH-CATT that considers effect was developed in this article. Firstly, according to analysis conducted through finite element method, time-varying meshing stiffness is calculated, and considering characterized by introducing fault characteristics. Then, load ratio introduced represent relationship between error...
This paper proposes a nonlinear dynamic modeling method based on the lumped mass approach to address challenge of vibrations output external gear and internal plate in an aerospace three-ring reducer. A vibration model bending–torsion coupling with 12 degrees freedom was established by comprehensively considering factors such as time-varying meshing stiffness, transmission error, tooth side clearance, bearing support damping. Finite element modal analysis test results verified model’s...
Abstract In adaptive control, the objective is to provide stability and acceptable performance in face of significant plant uncertainty. However, often there are large transients output control signal can become excessively large. Here, we consider first order case with parameters restricted a compact set; show how design (linear time‐varying) controller which provides near optimal LQR performance. This periodic each period split into two parts: during Estimation Phase, an estimate formed;...
In this paper, a passivity-based control (PBC) algorithm with disturbance reject is proposed to obtain precise position of Linear Switched Reluctance Motor (LSRM) driving system in short distance applications. the framework two-time-scale analysis, whole decomposed into two reduced-order models. With models, an improved PBC designed nonlinear friction outer loop. Three simulations are performed and results demonstrate effective for LSRM tracking
Subject to data acquisition time, X-ray dose and geometric position of medical tomography system, only limited-angle or sparse projection can be collected in many applications computed (CT). Lacking completeness symmetry leads a huge search space for reconstruction algorithms. The conventional convex optimization methods typically suffer from poor convergence unwanted local optima caused by the insufficiency fixed descent path iteration. To improve quality, stochastic iterative evolution CT...
The 4SPRR-SPR parallel robot, which has considerable potential for application in the field of machining, is a novel closed-loop mechanism with high rigid-weight ratio. Kinematics and workspace analyses robot are key requirements its machining. In this study, inverse kinematics analyzed using geometric method based on arrangement robot. forward model derived by training vector-quantified temporal associative memory (VQTAM) network, originates from self-organizing map (SOM). Furthermore, an...