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2017 International Conference on Mechanical, System and Control Engineering (ICMSC)最新文献

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Optimal position control of a DC motor using LQG with EKF 基于LQG和EKF的直流电机最优位置控制
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959461
M. Aravind, N. Saikumar, N. Dinesh
This paper deals with the implementation of the Linear Quadratic Gaussian (LQG) with an Extended Kalman Filter (EKF) for the position control of a PMDC motor. LQG is a popularly used linear optimal control technique in literature. However, the direct implementation of LQG with the use of the Kalman Filter as the optimal estimator is incapable of adapting to changes in the system parameters which results in a deviation from the expected optimal performance. EKF allows for the estimation of the system parameter values along with the unknown states of the system. The estimated values are used to constantly update the plant model and calculate the gains for optimal performance. The effectiveness of this technique on the DC motor position control system for various changes in system parameter values is studied in this paper and compared with the performance of a simple Kalman Filter to show the improvement in performance. The results show improvements in both step responses and tracking performances with the use of the EKF estimator along with the LQG controller.
本文研究了线性二次高斯(LQG)和扩展卡尔曼滤波(EKF)在PMDC电机位置控制中的应用。LQG是文献中常用的线性最优控制技术。然而,使用卡尔曼滤波器作为最优估计器的LQG的直接实现无法适应系统参数的变化,从而导致偏离预期的最优性能。EKF允许对系统参数值以及系统的未知状态进行估计。估计值用于不断更新工厂模型并计算最佳性能的增益。本文研究了该技术在直流电机位置控制系统中对系统参数值变化的有效性,并与简单卡尔曼滤波器的性能进行了比较,以显示性能的提高。结果表明,使用EKF估计器和LQG控制器可以改善阶跃响应和跟踪性能。
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引用次数: 18
Influences of pressures and cycle times on properties of final plastic product from HDPE 压力和循环次数对HDPE最终塑料制品性能的影响
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959431
K. Ráž, Z. Chval
This paper deals with the possibilities of improving the quality of final product from plastic material. Advanced CAE simulation with finite element method was used as a tool for this research. Main aim of this article is to show procedure how to determine optimal level of injection pressure, packing pressure and times of all injection phases. All these parameters lead to improving of final properties of product. Wide range of values is given for each parameter and it is necessary to determine the suitable value. Exact influences of each parameter on the final product were detected with usage of CAE simulations of injection molding. All these dependencies were in article described. Research was focused on influence of all parameters on final product and also on technological process. Level of mold filling, number and size of weld lines, number of air traps and overall production times were chosen as main parameters for evaluation. Reference part is reinforcement profile from spoiler in racing formula car. Process with mean values of each parameter was chosen as a reference process. Influence were tested on product from high density polyethylene. Material properties for CAE simulation were clearly described in this article. All simulations were validated by experiment performed on real injection molding machine.
本文讨论了提高塑料制品质量的可能性。采用先进的CAE有限元模拟技术作为研究工具。本文的主要目的是展示如何确定最佳注射压力水平,填料压力和所有注射阶段的时间。这些参数都有助于提高产品的最终性能。每个参数的取值范围很广,有必要确定合适的值。利用注射成型CAE模拟,检测了各参数对最终产品的确切影响。本文描述了所有这些依赖关系。重点研究了各参数对最终产品及工艺过程的影响。以充模水平、焊缝数量和尺寸、疏气阀数量和总生产次数为主要评价参数。参考部分为方程式赛车扰流板的强化型材。选取各参数的平均值作为参考过程。试验了对高密度聚乙烯制品的影响。本文对用于CAE模拟的材料性能进行了详细的描述。仿真结果在实际注塑机上得到了验证。
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引用次数: 6
Algorithms of aerospace photo processing in a quasi-two-dimensional non-trygonometrical spectral space 准二维非trygonometric光谱空间中航空航天照片处理算法
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959491
B. Kostrov, A. Kolesenkov, E. Ruchkina, V. Ruchkin, D. Grigorenko
The paper employs theoretic and methodological generalization in order to develop new algorithms of orthogonal transformation in the field of aerospace photo processing. Employing systems of Vilenkin-Chrestenson functions (VCF) in a non-trigonometrical space, we obtain a minimally possible shape of their construction. The paper describes algorithms and filtration samples (quasi-two- dimensional filtering and correlation analysis of aerospace photos when applied to distortions and image noise.
通过理论和方法的推广,提出了航空航天图像处理领域的正交变换新算法。利用非三角空间中的维伦金-克里斯特森函数(VCF)系统,我们得到了其构造的最小可能形状。本文介绍了航空航天照片在处理畸变和噪声时的滤波算法和滤波样本(准二维滤波和相关分析)。
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引用次数: 1
A novel temperature compensation method for proportional solenoid 一种新型比例螺线管温度补偿方法
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959486
Chang Lu, Qing Zhuo, Yongheng Jiang, Kaisheng Huang, Xiaomei Luo, Shubiao Guo
In the clutch-to-clutch shifting control of automatic transmission system, the precise control of oil pressure in the clutch chamber is crucial, for which the proportional solenoid is the key component. The electrical parameters of solenoid will change considerably due to temperature variation, which will result in the change of input-output characteristics of solenoid and the deterioration of shifting quality. In order to realize a smooth shifting control under any temperature circumstance, the electrical, hydraulic and mechanical model of the solenoid are analyzed. The temperature influence on resistance and inductance of solenoid are provided and they can account for the variation of oil pressure and flow. Finally, a novel temperature compensation method for proportional solenoid applied to the automatic transmission system is developed. It can be implemented for embedded devices due to its low computational load. Experimental results are also provided to validate the model and the temperature compensation method.
在自动变速器系统的离合换档控制中,离合器腔油压的精确控制至关重要,比例电磁阀是其中的关键部件。由于温度的变化,电磁阀的电气参数会发生较大的变化,导致电磁阀的输入输出特性发生变化,换挡质量变差。为了实现在任意温度环境下的平稳换挡控制,对电磁阀的电气、液压和力学模型进行了分析。给出了温度对螺线管电阻和电感的影响,它们可以解释油压和流量的变化。最后,提出了一种适用于自动变速器的比例电磁阀温度补偿方法。由于其计算负荷低,可以在嵌入式设备上实现。实验结果验证了模型和温度补偿方法的正确性。
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引用次数: 0
Evaluation of structural behaviour of a novel compliant prosthetic ankle-foot 一种新型柔性踝关节-足假体的结构性能评价
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959443
T. T. Nguyen, Hieu Giang Le, Thanh-Phong Dao, Shyh-Chour Huang
This paper proposes a new design of a compliant prosthetic ankle-foot. The ankle-foot is made of glass-fiber reinforced plastic (GFRP) as a composite. The finite element analysis is used to evaluate the structural behavior of the ankle-foot, including the deformation, stress, strain energy, and first natural frequency. The heel-strike, midstance, and toe-off of the ankle-foot are analyzed with three different boundary conditions. The results indicated that the highest von Mises stresses is found on the shank at toe-off. The maximum energy strain of 0.304 mJ is recognized at the instep. The obtained values of stress are still much smaller than the yield strength of GFRP. The results also revealed that the prosthetic ankle-foot is becoming more flexible as due to the compliant ankle. At last, the prosthetic ankle-foot was proved as an effective device to support a human body up to 100 N.
本文提出了一种柔性踝关节-足假体的新设计。踝脚由玻璃纤维增强塑料(GFRP)作为复合材料制成。采用有限元分析方法评估了踝足的结构性能,包括变形、应力、应变能和第一固有频率。在三种不同的边界条件下,分析了踝关节脚的脚跟撞击、中间和脚趾脱落。结果表明,在小腿脚趾处von Mises应力最大。脚背处最大能量应变为0.304 mJ。所得应力值仍远小于GFRP的屈服强度。结果还显示,由于踝关节的顺应性,假肢踝关节-脚变得更加灵活。最后,通过实验验证了该假肢是一种有效的人体支撑装置。
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引用次数: 5
Robust optimization of satellite attitude control system with on-off thruster under uncertainty 不确定条件下带开关推进器的卫星姿态控制系统鲁棒优化
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959495
Vahid Bohlouri, M. Ebrahimi, S. G. J. Naini
In this paper, a modified PI-D controller with pulse width pulse frequency (PWPF) modulator with on-off thruster for a rigid satellite is tuned under uncertainties in a quasi- normalized form. A modified proportional-integral-derivative (PID) based on observer method is used as a controller. Uncertainty is considered on thruster model, thrust level, and external disturbance parameters. Thruster is modeled with a constant delay followed by a second-order binomial transfer function. The modulator update frequency, the input to the on- off thruster, is limited to 50 Hz. Controller gains are tuned and optimized using a multi-objective genetic algorithm. The simulation results of the deterministic optimization show that the rise time is reduced and the overshoot is removed. Moreover, robust optimization is applied to this problem using a combination of deterministic optimization and Monte Carlo simulation. Next, the statistical properties of the results, such as expected value and variance are evaluated. These properties are used as the objective functions of the optimization problem, and the results are compared to each other. The variation of objective function in robust optimization is reduced, which means that the robustness under uncertainties is enhanced. Using quasi-normalized equations and merging the moment of inertia, thrust level and filter gain with other parameters, the results are more general and useful for other spacecraft with different characteristics.
针对刚性卫星,提出了一种改进的带开关推射器脉宽脉频调制器的PI-D控制器,在不确定条件下以准归一化形式进行了调谐。采用基于观测器的改进比例-积分-导数(PID)作为控制器。考虑了推力器模型、推力水平和外部扰动参数的不确定性。采用二阶二项式传递函数对推力器进行恒延时建模。调制器更新频率,输入到开关推力器,被限制在50赫兹。控制器增益采用多目标遗传算法进行调谐和优化。仿真结果表明,该优化方法减少了上升时间,消除了超调量。此外,采用确定性优化和蒙特卡罗模拟相结合的方法对该问题进行了鲁棒优化。接下来,评估结果的统计属性,如期望值和方差。将这些性质作为优化问题的目标函数,并对结果进行比较。减小了鲁棒优化中目标函数的变化,增强了鲁棒性。采用准归一化方程,并将惯性矩、推力水平和滤波增益与其他参数合并,所得结果更具通用性,可用于其他具有不同特性的航天器。
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引用次数: 5
An approach on convergent section design for open water channels 明渠收敛断面设计方法研究
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959453
Lerchai Kirasumutranon, D. Phaoharuhansa, S. Saimek
Normally, the open water channel is used to analyze the fluid dynamics when fluid flow through the model. The design convergent section approach is consider in order to determine inlet water velocity conditions and the variation of the curve profile. The convergent section is designed using third, fifth and seventh order polynomial equation, respectively. The result to shows that the optimization of the condition was affected uniform water velocity profile in test section. The third order polynomial wall generates maximum water flow speed about 0.25 m/s at 0.05 m/s of inlet water velocity. The fifth order polynomial wall of convergent section was generated maximum water flow speed about 0.31 m/s at 0.05 m/s of inlet water velocity. The seventh order polynomial generates maximum water flow speed about 0.61 m/s at 0.02 m/s of inlet water velocity. The increasing of degree order polynomials were increased water flow speed in test section. The fifth order polynomial wall of convergent section is velocity profile uniform, when Compare with third and seventh order polynomial
通常情况下,使用开阔的水道来分析流体流过模型时的流体动力学。为了确定进水流速条件和曲线曲线的变化,考虑了设计收敛截面法。分别用三阶、五阶和七阶多项式方程设计了收敛段。结果表明,条件的优化影响了试验段均匀的水速分布。三阶多项式壁面在进口水速为0.05 m/s时产生的最大水流速度约为0.25 m/s。在进口水速为0.05 m/s时,收敛截面的五阶多项式壁面产生的最大水流速度约为0.31 m/s。在进口水速为0.02 m/s时,七阶多项式得到的最大水流速度约为0.61 m/s。阶次多项式的增加增加了试验段的水流速度。与三阶和七阶多项式相比,收敛段的五阶多项式壁面速度分布均匀
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引用次数: 0
The synthesis of the algorithms for state estimation and the parameters of measurement converters based on the combined maximum principle in the problems of dynamic error correction 动态误差校正问题中基于组合极大值原理的状态估计算法和测量变换器参数的综合
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959489
S. Lazarenko, I. Pugachev, A. Kostoglotov, Igor Deryabkin, D. Andrashitov
The proposed algorithms for state estimation and the parameters of measurement converters are based on the statement that the Lagrange equations of the second kind describing these dynamics are valid. This allows based of the combined of the maximum principle to obtain the structure of corrective feedback in a closed form, which provides convergence of the estimates of the accelerometer parameters to the actual values. The theoretical conclusions are confirmed by the results of mathematical simulation. It is shown that the developed algorithm provides saving of computational cost in comparison with the Kalman filter.
所提出的状态估计算法和测量转换器的参数是基于描述这些动态的第二类拉格朗日方程是有效的。这允许基于最大原理的组合得到一个封闭形式的校正反馈结构,它提供了加速度计参数估计值与实际值的收敛性。数学模拟结果证实了理论结论。结果表明,与卡尔曼滤波相比,该算法节省了计算量。
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引用次数: 0
Design and optimization of composite parts using numerical simulations 复合材料零件的数值模拟设计与优化
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959434
F. Sedlacek, Václava Lašová
The article deals with the use of numerical simulations for the design and optimization of parts with complicated shapes made from composite materials. An airbox designed for a light single-seat racing car was chosen as a representative example. The numerical analysis is primarily focused on the maximum reduction of the mass of the component while retaining adequate stiffness and strength and also taking into account the manufacturing technology of the component. Carbon composite fabrics in combination with high performance epoxy resin were used to ensure the maximum stiifness of the part. In order to ünd the best option, an advanced CAE simulation based on the Finite Element Method was used with a special module designated directly for creating models from alternative materials. Zone-based and ply-based FE models were created to find the optimal layout of the individual plies of the laminate. Maximum stress failure criterion was used to evaluate the strength of the part. A 3D model for the numerical simulation follows all the layers of the composite materials, including cuts, notches, resin drops and precise calculation of the main directions of the fibres and their distortion or overlap caused by more complex shaped surfaces.
本文讨论了数值模拟在复合材料复杂形状零件设计与优化中的应用。以轻型单座赛车的气箱设计为代表。数值分析主要集中在最大限度地减少部件的质量,同时保持足够的刚度和强度,并考虑到部件的制造技术。采用碳纤维复合织物与高性能环氧树脂相结合,保证了零件的最大刚度。为了找出最佳方案,采用了基于有限元法的高级CAE仿真,并使用了一个专门用于从替代材料创建模型的特殊模块。建立了基于区域和层合层的有限元模型,以找到层合板各层的最佳布局。采用最大应力破坏准则评价零件的强度。用于数值模拟的3D模型遵循复合材料的所有层,包括切割,缺口,树脂滴和纤维主要方向的精确计算以及由更复杂形状表面引起的变形或重叠。
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引用次数: 2
An inspection approach for casting defects detection using image segmentation 一种基于图像分割的铸件缺陷检测方法
Pub Date : 2017-05-01 DOI: 10.1109/ICMSC.2017.7959451
F. Riaz, K. Kamal, T. Zafar, R. Qayyum
Casting defects are significant factors to overall quality of foundry manufactures. The detection and recognition of these defects can provide effective information for production optimization and efficient product life cycle support. The paper suggests an innovative approach for casting defects detection using their classification for a futuristic automated optical inspection. This research proposes a novel technique that utilizes image segmentation to detect casting surface defects. The defects under scrutiny include cracks, blowholes and pinholes that are initially filtered to remove noise and clutter, subsequently the target image is segmented using K-Means partitioning. Hence, the proposed technique shows promising results to classify casting defects using the aforementioned image segmentation technique.
铸造缺陷是影响铸造企业整体质量的重要因素。这些缺陷的检测和识别可以为生产优化和高效的产品生命周期支持提供有效的信息。本文提出了一种创新的方法,铸造缺陷检测使用他们的分类为未来的自动化光学检测。本研究提出了一种利用图像分割检测铸件表面缺陷的新技术。检测的缺陷包括裂纹、气孔和针孔,这些缺陷首先经过过滤以去除噪声和杂波,然后使用K-Means分割对目标图像进行分割。因此,该技术在使用上述图像分割技术对铸件缺陷进行分类方面显示出良好的效果。
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引用次数: 19
期刊
2017 International Conference on Mechanical, System and Control Engineering (ICMSC)
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