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2022 6th International Conference on Green Technology and Sustainable Development (GTSD)最新文献

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An Eye-to-Hand Visual Servoing Controller of 3-DOF Robot Using Feature Matching Technology 基于特征匹配技术的三自由度机器人眼手视觉伺服控制器
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9988995
Nguyen Dang Hung Phu, Vo Nguyen Thong, Dang Xuan Ba
In robotic control sectors, the image-based visual servo method is an advanced approach used to control the robot to the desired position by using pixels from cameras. We can control the robot flexibly to achieve high quality when the joint variables have little backflash. Applications of this method can be classified into two groups: eye-in-hand and eye-to-hand ones. In this paper, we employ the eye-to-hand method for position tracking control problems of robotic manipulators. Kinematics of the robot and camera are first derived based on homogenous transformation relation and pinhole models. The control technique uses the normalized difference between the pixel observed from the camera and the desired pixel to result in proper control signals throughout a flexible activation gain. The feasibility of this method will be demonstrated through comparative simulation results.
在机器人控制领域,基于图像的视觉伺服方法是一种先进的方法,用于利用相机的像素来控制机器人到期望的位置。在关节变量反闪很小的情况下,可以灵活地控制机器人,达到高质量。该方法的应用可分为两类:眼对手和眼对手。本文采用眼-手方法求解机器人的位置跟踪控制问题。首先基于齐次变换关系和针孔模型推导了机器人和摄像机的运动学。控制技术使用从相机观察到的像素和期望像素之间的归一化差,从而在整个灵活的激活增益中产生适当的控制信号。通过对比仿真结果验证该方法的可行性。
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引用次数: 0
FCMD-Net: A Full-Connection Multi-Decoder Network for Polyp Segmentation FCMD-Net:一个用于息肉分割的全连接多解码器网络
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989317
Q. Nguyen, Thi-Thao Tran, Van-Truong Pham
Colorectal cancer is ranked 4th in the list of leading causes of death after lung, stomach, and liver cancers. Most colorectal cancers arise from growths in the mucosa of the colon called polyps. Therefore, early detection of polyps can help to faster monitor and treat for both patients and doctors. This requires an automatic, accurate, efficient, and reliable polyp segmentation system. Currently, U-shape architectures have shown promising performance with developments and advancements in encoder and decoder designs as well as skip connection solutions. However, existing skip connection approaches face some problems such as plenty of redundant information, or lack of generality causing to weakening of feature maps. To handle this challenge, we propose a new architecture namely Full-Connection Multi-Decoder Network (FCMD-Net) for the polyp segmentation task. First, we design a new model, using an encoder and three decoder branches to take advantage of multi-path information to increase inference speed and produce a better prediction mask. Besides, we create a skip connection method called full-connection to reduce effectively the semantic gap between two components encoder and decoder. In addition, we inherit and flexibly apply Atrous Spatial Pyramidal Pooling blocks to increase the performance of the model. The results on the Kvaisir-Seg dataset and CVC-ClinicDB dataset demonstrate that FCMD-Net has advantages over state of the art methods in the benchmark.
结直肠癌是继肺癌、胃癌、肝癌之后的第4大死亡原因。大多数结直肠癌是由结肠粘膜的息肉引起的。因此,早期发现息肉可以帮助患者和医生更快地监测和治疗。这就需要一个自动、准确、高效、可靠的息肉分割系统。目前,随着编码器和解码器设计以及跳过连接解决方案的发展和进步,u型架构已经显示出有希望的性能。然而,现有的跳过连接方法存在冗余信息过多、通用性不足等问题,导致特征映射弱化。为了应对这一挑战,我们提出了一种新的结构,即全连接多解码器网络(FCMD-Net)用于息肉分割任务。首先,我们设计了一个新的模型,使用一个编码器和三个解码器分支来利用多路径信息来提高推理速度并产生更好的预测掩码。此外,我们还创建了一种称为全连接的跳过连接方法,以有效地减少编码器和解码器两个组件之间的语义差距。此外,我们继承并灵活应用了空间金字塔池块,提高了模型的性能。在Kvaisir-Seg数据集和CVC-ClinicDB数据集上的结果表明,FCMD-Net在基准测试中具有优于最先进方法的优势。
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引用次数: 0
New PWM Strategy for Quasi-Z-Source Three-Level T-Type Inverter with Inductor Current Ripple Reduction 电感电流纹波抑制的准z源三电平t型逆变器PWM新策略
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989092
Do Duc Tri, Trần Vĩnh Thanh, Hồ Anh Khoa, Nguyen Phan Thanh, N. Thoi
The topology of a three-level quasi Z-source T Type inverter (qZST2I) is presented in this paper. This circuit is combined with two symmetrical quasi-Z source networks with T-type inverter to operate a shoot-through (ST) mode, in which both power switches in the same leg can be switched on at the same time, is avoided. A new pulse-width modulated (PWM) control method is used to reduce the ripple of input inductor current by the technique of shifting the reference signal and duty cycle (D), the total shoot-through time remains constant. The simulation and experimental results demonstrate the efficiency of the 3L-qZST2I inverter topology and control methods.
本文给出了一种三电平准z源T型逆变器(qZST2I)的拓扑。该电路与两个对称的准z源网络结合t型逆变器,以避免同一支路的两个功率开关同时接通的ST (shot -through)模式。采用一种新的脉宽调制(PWM)控制方法,通过移动参考信号和占空比(D)来减小输入电感电流的纹波,使总穿透时间保持不变。仿真和实验结果验证了3L-qZST2I逆变器拓扑结构和控制方法的有效性。
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引用次数: 0
Identification modeling and Steering Controller Design for Unmanned Surface Vehicles 无人水面车辆识别建模与转向控制器设计
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989095
Tu-Cuong Nguyen
With the continuous advancement of science and technology, many unmanned surface vehicles (USVs) are being developed for many different applications: military, environmental, mapping… So the steering (heading) control is for unmanned surface vehicles important research designed for motion control. It is not only about handling and ship stabilization, but also the basics of trajectory tracking and obstacle avoidance. During the USV research, mathematical models of steering control were critical to explaining vehicle behavior and stability. Therefore, this paper introduces two contents related to USV steering control, namely model identification and steering control design. For this purpose, the Nomoto model is chosen as the recognition model. These defined offline Nomoto models can serve a variety of purposes: simulation purposes or offline control algorithms… First, experiments are performed to collect experimental data (zigzag tests…), then prediction error identification methods are used to identify Nomoto model parameters, such as recursive least squares (RLS). To verify the recognition accuracy and model results, a sliding mode controller (SMC) was designed based on the established model. Finally, the simulation and experimental results show that the sliding mode controller and integrated line-of-sight guidance (ILOS) have good control effects, proving their feasibility and stability. All of this shows the correctness and practical value of the established model, and on this basis, advanced control algorithms, trajectory tracking, obstacle avoidance… are developed for USV.
随着科学技术的不断进步,许多无人水面飞行器(usv)被开发用于许多不同的应用:军事、环境、测绘……因此转向(航向)控制是无人水面飞行器运动控制设计的重要研究方向。它不仅涉及操纵和船舶稳定,还涉及轨迹跟踪和避障的基本知识。在无人潜航器的研究中,转向控制的数学模型是解释车辆行为和稳定性的关键。因此,本文介绍了无人潜航器转向控制的两个相关内容,即模型辨识和转向控制设计。为此,我们选择Nomoto模型作为识别模型。这些定义的离线Nomoto模型可以用于各种目的:仿真目的或离线控制算法…首先,进行实验以收集实验数据(之形测试…),然后使用预测误差识别方法来识别Nomoto模型参数,例如递归最小二乘法(RLS)。为了验证识别精度和模型结果,在此基础上设计了滑模控制器(SMC)。最后,仿真和实验结果表明,滑模控制器和集成视距制导(ILOS)具有良好的控制效果,证明了其可行性和稳定性。这些都表明了所建立模型的正确性和实用价值,并在此基础上开发了用于无人潜航器的先进控制算法、轨迹跟踪、避障等。
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引用次数: 0
Synthesis of Novel Transmission Systems for Electrified Vehicles 新型电动汽车传动系统的综合
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989199
N. Hoang, Hong–Phuc Vo, Cong–Son Pham
With the modern development in the world of vehicles, electric and hybrid vehicles account for a relatively large part of the world in which the powertrain determines the vehicle's performance. To continue developing and synthesizing many novel structures, Yan's method is the optimal method to analyze and synthesize the existing structures. This article proposes a new process of applying Yan's method by arranging the clutches and requirements with the corresponding structures. Then, the structures of five, six, seven, and eight links are synthesized and generated. To demonstrate the feasibility of the structures and create the corresponding operating modes, the 6-link structures are selected to provide adequate torque and working conditions for the electrified vehicles.
随着现代汽车的发展,电动和混合动力汽车在世界上占有相当大的份额,其中动力总成决定了汽车的性能。为了继续开发和合成许多新的结构,Yan的方法是分析和合成现有结构的最佳方法。本文提出了一种应用Yan方法的新过程,即将离合器和要求与相应的结构进行排列。然后,合成并生成五、六、七、八连杆结构。为了证明结构的可行性,并创建相应的运行模式,选择六连杆结构,为电动汽车提供足够的扭矩和工作条件。
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引用次数: 0
Compact Y-shaped Broadband Planar Antenna for WBAN Applications 用于WBAN应用的紧凑y形宽带平面天线
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989254
Vishal Das, S. Rawat
A compact Y - Shaped antenna with a defected ground structure for Wireless Body Area Network is presented and is operating in the terahertz frequency range. This antenna is having an impedance bandwidth of 10.519 THz (1.147 THz-11.66 THz) and a microstrip feed line is employed to feed the antenna. By making amendments in patch shape and causing defects in the ground, size reduction of the antenna and substantial enhancement in bandwidth are reached. The antenna is radiating at 2.515 THz, 3.872 THz, 7.287 THz, and 10.084 THz respectively. To get the desired result parametric investigation is conducted and the results are described methodically. The maximal gain of the antenna is 15.07 dB at 7.716 THz.
提出了一种工作在太赫兹频率范围内的具有缺陷接地结构的小型Y形无线体域网络天线。该天线的阻抗带宽为10.519太赫兹(1.147太赫兹-11.66太赫兹),采用微带馈线为天线馈电。通过修正贴片形状,在地面制造缺陷,使天线尺寸减小,带宽大幅提高。天线的辐射频率分别为2.515 THz、3.872 THz、7.287 THz和10.084 THz。为了得到预期的结果,进行了参数调查,并对结果进行了系统的描述。该天线在7.716 THz时的最大增益为15.07 dB。
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引用次数: 0
Development of Proportional Integral Derivative Controller of High-Pressure Pump in Stand-Alone Common Rail Injection System for Engine Research 发动机单机共轨喷射系统高压泵比例积分导数控制器的研制
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989032
Nawee Nuntapap, Prathan Srichai, P. Yeunyongkul, Ronnachart Munsin
This paper aims to develop a technique for controlling fuel pressure in a common rail injection system using proportional integral derivative control (PID). Test fuel was blended fuel between diesel and biodiesel of 93:7 %vol. The multiple injection strategies were tested under the injection pressure of 350 to 800 bar. Injection duration was varied in the range of 0.82-5 ms with a constant dwell time of 6.4 ms. Injection period was set as 171 ms, corresponding to the engine idle speed of 750 rpm. Suction control valve was controlled by pulse width modulation. The results showed that fuel pressure in the common rail can be controlled by PID controller for different injection strategies with fluctuation pressure in the rail less than 1%. The fluctuation pressure trends to have lower fluctuation pressure in case of higher pressure.
研究了一种用比例积分导数控制(PID)控制共轨喷射系统燃油压力的方法。试验燃料为93:7%体积的柴油与生物柴油混合燃料。在350 ~ 800 bar的注入压力下,对多种注入策略进行了测试。注射时间为0.82 ~ 5ms,固定停留时间为6.4 ms。喷射周期设定为171 ms,对应发动机怠速750 rpm。吸气控制阀采用脉宽调制控制。结果表明:采用PID控制器对不同喷油策略的共轨燃油压力进行控制,且共轨燃油压力波动小于1%。压力越高,波动压力越小。
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引用次数: 0
Self-evolving Multilayer Type-2 Fuzzy Controller Design For Time-Varying Delay Systems 时变时滞系统的自进化多层2型模糊控制器设计
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989243
Tien-Loc Le, Kim Long Ngo, Van Binh Ngo, Nguyen Vu Quynh, Sowmyanarayanan Murugan, Tran Van Thanh
This study presents a design of the multilayer type-2 fuzzy controller (MT2FC) to control the time-varying delay systems. By using the proposed multilayer structure, the number of fuzzy rules can be reduced while ensuring good coverage of input states. The self-evolving algorithm is used to automatically obtain the optimal network structure. The network parameters are updated online using the gradient descent method. Finally, the performance of the proposed control method is illustrated by numerical simulations of the time-varying delay systems.
本文设计了一种多层2型模糊控制器(MT2FC)来控制时变时滞系统。通过使用所提出的多层结构,可以减少模糊规则的数量,同时保证对输入状态的良好覆盖。采用自进化算法自动获得最优网络结构。采用梯度下降法在线更新网络参数。最后,通过对时变时滞系统的数值仿真验证了所提控制方法的有效性。
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引用次数: 0
Advanced Flywheel-based Balance for Biped Robot Stably Walking 两足机器人稳定行走的先进飞轮平衡
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989303
T. T. Huan, Cao Van Kien, N. Dat, H. Anh
An advanced flywheel-based balance for biped robots is presented to follow the desired gait. Firstly, a dynamic model of hybrid biped-flywheel in walking is built. Then, a new balance controller is designed based on a flywheel located at the upper biped body, which is a closed-loop controller with the feedback signal being the tilt angle of the upper biped body related to the gravity acceleration to keep the biped body parallel to the ground exactly the desired gait. The PD+ controller is implemented whose parameters will be optimized using the multi-objective MO-Jaya algorithm. Eventually, proposed solution is successfully applied for the small-sized biped robot (HUBOT-4.1) to robustly walk in balance along with the desired gait. Simulation and experiment results prove that the proposed solution is effective
提出了一种先进的基于飞轮的两足机器人平衡系统,使其能够遵循期望的步态。首先,建立了两足-飞轮混合行走的动力学模型。然后,设计了一种新的基于飞轮的平衡控制器,该控制器是一种闭环控制器,其反馈信号为上两足体与重力加速度相关的倾斜角,以使两足体与地面保持精确的平行步态。实现了PD+控制器,并采用多目标MO-Jaya算法对其参数进行优化。最终,所提出的解决方案成功应用于小型双足机器人(HUBOT-4.1),使其能够以期望的步态稳健地平衡行走。仿真和实验结果证明了该方法的有效性
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引用次数: 1
Adaptive Noise Cancellation Using Petri Fuzzy Brain Emotional Learning-Based Neural Network 基于Petri模糊大脑情绪学习的神经网络自适应噪声消除
Pub Date : 2022-07-29 DOI: 10.1109/GTSD54989.2022.9989266
Sowmyanarayanan Murugan, Tien-Loc Le, Phan Nhu Quan
This study briefs the application of a novel intelligent algorithm as an adaptive filter. The proposed algorithm, Petri fuzzy brain emotional learning-based neural network (PNFBELNN) is designed by introducing Petri Net layers in fuzzy brain emotional learning-based neural network. The Petri Net reduces the computational load caused by parameter learning and improves fuzzy reasoning thus enabling high-speed signal processing. The proposed filter is applied as an adaptive noise canceller. The performance of the filter is illustrated through numerical simulations of the noise cancelation system.
本文简要介绍了一种新的自适应滤波智能算法的应用。在基于模糊大脑情绪学习的神经网络中引入Petri网层,设计了Petri模糊大脑情绪学习神经网络(PNFBELNN)算法。Petri网减少了由参数学习引起的计算量,改进了模糊推理,从而实现了高速信号处理。该滤波器作为一种自适应噪声消除器。通过对噪声消除系统的数值模拟,说明了该滤波器的性能。
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引用次数: 0
期刊
2022 6th International Conference on Green Technology and Sustainable Development (GTSD)
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