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Super-twisting sliding mode controller with fuzzy logic based moving sliding surface for electronic throttle control 基于模糊逻辑的电子节气门控制超扭滑模控制器
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.10007356
A. Kareem
In this paper, a super-twisting sliding mode controller with a moving sliding surface is proposed for electronic throttle control. The idea behind this control algorithm is to utilise a fuzzy logic controller to vary the sliding surface based on error and rate of change of error. The simulation results have confirmed the improved dynamic performance of the proposed control algorithm in terms of faster response compared with super-twisting sliding mode controller with a fixed sliding surface. The improvement in the dynamic performance is achieved without compromising the stability, robustness and tracking accuracy.
本文提出了一种用于电子节气门控制的具有移动滑动面的超扭转滑模控制器。该控制算法背后的思想是利用模糊逻辑控制器基于误差和误差变化率来改变滑动表面。仿真结果证实,与具有固定滑动面的超扭曲滑模控制器相比,所提出的控制算法在响应更快方面的动态性能有所改善。在不影响稳定性、鲁棒性和跟踪精度的情况下实现了动态性能的改进。
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引用次数: 0
Driving pattern analysis of hybrid and electric vehicles in a German conurbation including a drive system evaluation 混合动力和电动汽车在德国城市的驾驶模式分析,包括驱动系统评估
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.10007365
S. Tewiele, M. Schüller, M. Koppers, D. Schramm
The official vehicle consumption data given by the vehicle manufacturer are in many countries based on standardised test cycles such as the New European Driving Cycle (NEDC). In reality, vehicle consumption normally differs depending on the individual usage profile. However, the knowledge of realistic consumption patterns plays an important role especially in the case of electric vehicles due to the range reduction due to energy consumption. This paper gives an overview of the typical usage profiles of electric and hybrid cars based on real driving data, which was recorded within a German conurbation. Based on these recorded driving profiles in combination with appropriate vehicle simulation models realistic consumption patterns and ranges are generated. Effects of different charging scenarios and various battery sizes are discussed. Finally, the suitability and efficiency of conventional cars as well as battery electric and plug-in hybrid electric vehicles for the regarded driving profiles are compared and evaluated.
车辆制造商提供的官方车辆消耗数据在许多国家基于标准化测试周期,如新欧洲驾驶周期(NEDC)。事实上,车辆消耗量通常因个人使用情况而异。然而,由于能源消耗导致续航里程减少,对现实消费模式的了解起着重要作用,尤其是在电动汽车的情况下。本文根据德国一个大都市的真实驾驶数据,概述了电动汽车和混合动力汽车的典型使用情况。基于这些记录的驾驶概况,结合适当的车辆模拟模型,生成真实的消耗模式和范围。讨论了不同充电场景和不同电池尺寸的影响。最后,对传统汽车、电池电动汽车和插电式混合动力汽车在所考虑的驾驶模式下的适用性和效率进行了比较和评估。
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引用次数: 9
Analysis of boost conversion process for a thermoelectric module 热电模块升压转换过程分析
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.086206
J. Sim, Rozli Zulkifli, S. Abdullah, Z. Harun
Thermoelectric modules are a useful way to extract waste energy from a readily available low quality heat source. However, the voltage generated by these modules varies with the temperature difference across its surfaces which are prone to fluctuations. Furthermore, the amount of voltage generated by individual modules is low. This can be rectified using voltage converters to stabilise the output voltage at the expense of some efficiency. In the case where a minimal number of modules are being used, a boost converter can be used to increase the input voltage from the thermoelectric modules to a higher level. Our previous study showed the results of the boost conversion process for multiple temperature differences, resulting in multiple input voltages and currents and found that the conversion efficiency increases with increasing input voltage at an almost constant input current. In this paper, we compare the experimental results for conversion efficiency against the expected values provided by the manufacturer, and find that when the input voltage is closer to the desired output voltage, the conversion efficiency increases.
热电模块是从容易获得的低质量热源中提取废能量的有用方法。然而,这些模块产生的电压随着其表面的温差而变化,这很容易发生波动。此外,由各个模块产生的电压量是低的。这可以使用电压转换器进行整流,以稳定输出电压,而牺牲一些效率。在使用最小数量的模块的情况下,可以使用升压转换器将热电模块的输入电压增加到更高的水平。我们之前的研究显示了多个温差的升压转换过程的结果,导致多个输入电压和电流,并发现在几乎恒定的输入电流下,转换效率随着输入电压的增加而增加。在本文中,我们将转换效率的实验结果与制造商提供的预期值进行了比较,发现当输入电压更接近期望的输出电压时,转换效率会提高。
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引用次数: 0
Modelling and control of piezoelectric actuators by a class of differential equations-based hysteresis models 一类基于微分方程的磁滞模型对压电执行器的建模与控制
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.086201
M. Ramli, Xinkai Chen
Hysteresis is a fundamental problem in most smart material-based actuators. This phenomenon limits the performance of systems driven by these actuators. This paper presents a control fusion strategy for hysteretic piezoelectric-based actuators which are described by Bouc-Wen model. A discrete prescribed performance control algorithm is developed and fused into the BW model. To verify the effectiveness of the modelling and control methods, experiments are made on a commercial piezoelectric actuator product. It is shown that the proposed controller guarantees not only the asymptotic stability but also transient performance.
磁滞是大多数基于智能材料的致动器中的一个基本问题。这种现象限制了由这些致动器驱动的系统的性能。本文提出了一种基于Bouc-Wen模型描述的滞回压电致动器的控制融合策略。开发了一种离散的规定性能控制算法,并将其融合到BW模型中。为了验证建模和控制方法的有效性,在商用压电致动器产品上进行了实验。结果表明,所提出的控制器不仅保证了渐近稳定性,而且保证了暂态性能。
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引用次数: 0
Development of estimated disturbance rejection feedback for an armoured vehicle using active front wheel steering 基于主动前轮转向的装甲车扰动抑制反馈估计方法研究
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.10007353
V. R. Aparow, K. Hudha, Megat M. H. M. Ahmad, S. Abdullah
An unwanted yaw motion occurred at the centre of gravity (CG) of the wheeled armoured vehicle caused by the impulse force generated during gun turret firing. The recoil force from the gun fire tends to create instability conditions for the armoured vehicle during firing condition and affects the dynamic performance of armoured vehicle in lateral direction. In this paper, an active safety system, active front wheel steering (AFWS) system using estimated disturbance rejection feedback (EDRF) embodiment is proposed to reject the unwanted yaw disturbance and stabilise the armoured vehicle. Besides, the proposed control strategy is also used to re-position the armoured vehicle back to its initial position. Therefore, a summation moment reference input is used to counter back the unwanted firing moment occurred due to gun firing impulse at CG of the armoured vehicle. The armoured vehicle is evaluated via simulation analysis in term of yaw rate, yaw angle, vehicle sideslip angle, lateral acceleration and lateral displacement. Significant improvements up to 75% have been achieved by using the proposed control strategy of AFWS system to reject the external disturbance due to the firing force.
在轮式装甲车的重心处,由于炮塔发射时产生的冲力而产生了不需要的偏航运动。火炮射击产生的后坐力容易造成装甲车辆在射击状态下的不稳定条件,并影响装甲车辆横向动力性能。本文提出了一种主动安全系统——采用估计抗扰反馈(EDRF)实施例的主动前轮转向(AFWS)系统,以抑制不必要的偏航干扰,实现装甲车辆的稳定。此外,所提出的控制策略还用于将装甲车重新定位到初始位置。因此,采用总和力矩参考输入来抵消由于火炮射击脉冲在装甲车辆重心处产生的不需要的射击力矩。通过仿真分析,对装甲车辆的横摆角速度、横摆角、车辆侧滑角、侧向加速度和侧向位移进行了评价。通过采用所提出的AFWS系统控制策略来抑制由发射力引起的外部干扰,系统的性能得到了75%的显著改善。
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引用次数: 1
Transmission ratio calibration for electro-mechanically actuated continuously variable transmission 机电驱动无级变速器的传动比校准
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.086199
I. Mazali, K. B. Tawi, B. Supriyo, N. A. Husain, M. S. C. Kob, M. S. C. Kob
Continuously variable transmission (CVT) with a metal pushing V-belt is widely used by car manufacturers for its advantages particularly in fuel economy. Nevertheless, this CVT currently applies a hydraulic-based actuation system to change and to maintain the desired CVT ratio which leads to reduction of CVT's efficiency due to engine's continuous power consumption. To address this issue, a prototype of electro-mechanically actuated CVT is introduced in this paper. Here, the prototype's working principle is explained and the process to evaluate its workability is described. This evaluation process is necessary to provide reference data for future development of the prototype especially in the areas of ratio control and belt's clamping force control. The evaluation's results suggest that the prototype has a ratio range from 2.93 to 0.67 with using only one DC motor to vary the ratio instead of typically two DC motors used by previous designs of electro-mechanically actuated CVT.
金属推进式v带无级变速器(CVT)因其在燃油经济性方面的优势而被汽车制造商广泛采用。然而,目前这款CVT采用了基于液压的驱动系统来改变和保持理想的CVT比,由于发动机持续的功率消耗,导致CVT效率降低。为了解决这一问题,本文介绍了一种机电驱动CVT样机。本文阐述了样机的工作原理,并对样机的可加工性进行了评价。该评价过程为今后样机的研制提供了必要的参考数据,特别是在传动比控制和皮带夹紧力控制方面。评估结果表明,原型的传动比范围为2.93至0.67,仅使用一个直流电机来改变传动比,而不是像以前设计的机电驱动CVT那样使用两个直流电机。
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引用次数: 4
Tremor suppression for 4-DOFs biodynamic hand model using genetic algorithm 基于遗传算法的四自由度生物动力学手部模型震颤抑制
Q4 Engineering Pub Date : 2017-09-04 DOI: 10.1504/IJAMECHS.2017.086207
A. As’arry, K. A. Rezali, N. A. A. Jalil, R. Samin, Z. A. Zulkefli, M. Zain
A person who has severe hand tremor will have difficulty in doing specific tasks such as eating, combing or holding any objects. Currently, there is no medication that can cure the tremor. Thus, this study proposes the active tremor control, in which an intelligent controller is applied to suppress the hand tremor. The main objective is to optimise the proportional-integral (PI) controller using genetic algorithm (GA). A linear voice coil actuator (LVCA) is applied onto a four degree of freedom (4-DOF) human hand model represented in state space. The findings of the study demonstrate that the PI controller optimised by GA gives excellent performance in reducing the tremor error. Based on the frequency evaluation, the PI controller performance was roughly around 84% in reducing the peak of simulated hand tremor. The outcomes provide an important contribution towards achieving novel methods in suppressing hand tremor model by means of intelligent control.
患有严重手抖的人会很难完成特定的任务,比如吃饭、梳洗或拿东西。目前,还没有治疗震颤的药物。因此,本研究提出了主动震颤控制,其中应用智能控制器来抑制手部震颤。主要目标是使用遗传算法(GA)优化比例积分(PI)控制器。将线性音圈致动器(LVCA)应用于状态空间中表示的四自由度(4-DOF)人手模型。研究结果表明,通过遗传算法优化的PI控制器在降低抖动误差方面具有良好的性能。基于频率评估,PI控制器在降低模拟手抖峰值方面的性能约为84%。这些结果为实现通过智能控制抑制手抖模型的新方法做出了重要贡献。
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引用次数: 0
Small Molecules from Nature Targeting G-Protein Coupled Cannabinoid Receptors: Potential Leads for Drug Discovery and Development. 来自自然界的靶向 G 蛋白偶联大麻素受体的小分子:药物发现和开发的潜在线索。
Q4 Engineering Pub Date : 2015-01-01 Epub Date: 2015-11-17 DOI: 10.1155/2015/238482
Charu Sharma, Bassem Sadek, Sameer N Goyal, Satyesh Sinha, Mohammad Amjad Kamal, Shreesh Ojha

The cannabinoid molecules are derived from Cannabis sativa plant which acts on the cannabinoid receptors types 1 and 2 (CB1 and CB2) which have been explored as potential therapeutic targets for drug discovery and development. Currently, there are numerous cannabinoid based synthetic drugs used in clinical practice like the popular ones such as nabilone, dronabinol, and Δ(9)-tetrahydrocannabinol mediates its action through CB1/CB2 receptors. However, these synthetic based Cannabis derived compounds are known to exert adverse psychiatric effect and have also been exploited for drug abuse. This encourages us to find out an alternative and safe drug with the least psychiatric adverse effects. In recent years, many phytocannabinoids have been isolated from plants other than Cannabis. Several studies have shown that these phytocannabinoids show affinity, potency, selectivity, and efficacy towards cannabinoid receptors and inhibit endocannabinoid metabolizing enzymes, thus reducing hyperactivity of endocannabinoid systems. Also, these naturally derived molecules possess the least adverse effects opposed to the synthetically derived cannabinoids. Therefore, the plant based cannabinoid molecules proved to be promising and emerging therapeutic alternative. The present review provides an overview of therapeutic potential of ligands and plants modulating cannabinoid receptors that may be of interest to pharmaceutical industry in search of new and safer drug discovery and development for future therapeutics.

大麻素分子提取自大麻植物,作用于 1 型和 2 型大麻素受体(CB1 和 CB2),这两种受体已被视为药物发现和开发的潜在治疗靶点。目前,有许多基于大麻素的合成药物被用于临床实践,如常用的纳比隆、屈大麻酚和Δ(9)-四氢大麻酚,它们通过 CB1/CB2 受体发挥作用。然而,众所周知,这些基于合成的大麻衍生化合物会对精神产生不良影响,并被用于滥用药物。这促使我们寻找一种对精神疾病不良影响最小的安全替代药物。近年来,人们从大麻以外的植物中分离出了许多植物大麻素。一些研究表明,这些植物大麻素对大麻素受体具有亲和力、效力、选择性和功效,并能抑制内源性大麻素代谢酶,从而降低内源性大麻素系统的亢奋程度。此外,与人工合成的大麻素相比,这些天然提取的分子所产生的不良影响最小。因此,以植物为基础的大麻素分子被证明是前景广阔的新兴治疗替代品。本综述概述了调节大麻素受体的配体和植物的治疗潜力,制药业可能会对这些配体和植物感兴趣,以寻找更安全的新药,开发未来的治疗方法。
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引用次数: 0
The navigation of mobile robots in non-stationary and non-structured environments 移动机器人在非静止和非结构化环境中的导航
Q4 Engineering Pub Date : 2013-11-19 DOI: 10.5281/ZENODO.30336
V. Vlădăreanu, G. Tont, L. Vlădăreanu
The paper presents the navigation of mobile walking robot systems for movement in non-stationary and non-structured environments. In the first approach are presented main elements for the successful completion of intelligent navigation. The wireless sensor networks (WSN), dynamical stability control, strategies for dynamical control and a Bayesian approach of simultaneous localisation and mapping (SLAM) for avoiding obstacles and dynamical stability control for motion on rough terrain are studied. By processing inertial information of force, torque, tilting and wireless sensor networks (WSN) an intelligent high level algorithm is implementing using the virtual projection method. New capabilities to improve the walking robot stability are developed through the real-time balance motion control. The dynamic robot walking is presented in correlation with a stochastic model of assessing system probability of unidirectional or bidirectional transition states, applying the non-homogeneous/non-stationary Markov chains. The results show that the proposed new navigation strategy of the mobile robot using Bayesian approach walking robot control systems for going around obstacles has increased the robot's mobility and stability in workspace.
研究了移动步行机器人系统在非静止和非结构化环境中的导航问题。在第一种方法中,提出了成功完成智能导航的主要要素。研究了无线传感器网络(WSN)、动态稳定控制、动态控制策略和贝叶斯同时定位与映射方法(SLAM),用于避障和在崎岖地形上运动的动态稳定控制。通过处理力、力矩、倾斜和无线传感器网络的惯性信息,采用虚拟投影法实现了一种智能高级算法。通过实时平衡运动控制,开发了提高步行机器人稳定性的新功能。利用非齐次/非平稳马尔可夫链,将机器人动态行走与评估系统单向或双向过渡状态概率的随机模型联系起来。结果表明,基于贝叶斯方法的移动机器人绕障导航策略提高了机器人在工作空间的移动性和稳定性。
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引用次数: 19
期刊
International Journal of Advanced Mechatronic Systems
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