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Fractional order adaptive robust formation control of multiple quad-rotor UAVs with parametric uncertainties and wind disturbances

2005年

作者： aslam Kassimali

来源：畅想之星图书光盘版（南... 评论

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畅想之星图书光盘版（南通市图书馆镜像）

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Chinese Journal of Aeronautics 2022年第8期35卷 204-220页

作者： Nasim ULLAH Yasir MEHMOOD Jawad aslam Shaoping WANG Khamphe PHOUNGTHONG Environmental Assessment and Technology for Hazardous Waste Management Research Center Faculty of Environmental ManagementPrince of Songkla UniversitySongkhla 90112Thailand Department of Electrical Engineering College of Engineering Taif UniversityAl-HawiyahTaif P.O Box:888Kingdom of Saudi Arabia School of Mechanical and Manufacturing Engineering NUSTIslamabad 44000 Pakistan School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100083China Faculty of Environmental Management Prince of Songkla UniversitySongkla90112Thailand

In recent times,multiple Unmanned Aerial Vehicles(UAVs)are being widely utilized in several areas of applications such as agriculture,surveillance,disaster management,search and rescue *** of robustness of applied control schemes determines how accurate a swarm of UAVs accomplish group *** and trajectory tracking controllers are required for the swarm of multiple *** like external environmental effects,parametric uncertainties and wind gusts make the controller design process as a challenging *** article proposes fractional order formation and trajectory tacking controllers for multiple quad-rotors using Super Twisting Sliding Mode Control(STSMC)*** compensate the effects of the disturbances due to parametric uncertainties and wind gusts,Lyapunov function based adaptive controllers are ***,Lyapunov theorem is used to guarantee the stability of the proposed *** types of controllers,namely fixed gain STSMC and fractional order Adaptive Super Twisting Sliding Mode Control(ASTSMC)methods are tested for the swarm of UAVs by performing the numerical simulations in MATLAB/Simulink *** the presented results,it is verified that in presence of wind disturbances and parametric uncertainties,the proposed fractional order ASTSMC technique showed improved robustness as compared to the fixed gain STSMC and integer order ASTSMC.

关键词： Adaptive robust control Fractional order control Nonlinear control Quad-rotor UAVs Swarm formation control

Electric-field induced fluctuations in laser generated plasma plume

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Plasma Science and Technology 2021年第4期23卷 83-89页

作者： Rizwan AHMED Abdul JABBAR Zeshan Adeel UMAR Muhammad aslam BAIG National Centre for Physics Quaid-i-Azam University Campus45320 IslamabadPakistan

The effect of an external electric field on laser-generated plasma has been *** is observed that the laser-generated plasma can be used for the ignition of a spark in the presence of a low voltage external electric *** eight-fold emission intensity enhancement in Cu I spectral lines are measured as compared to the signal intensity in the absence of an external electric *** plasma parameters remain the same initially,up to a few microseconds after the generation of plasma,and this feature makes it more interesting for the quantitative analysis of any sample using laser induced breakdown spectroscopy(LIBS).In the presence of an external electric field,fluctuations(contraction and expansion)in the laser-generated plasma are observed which increase the plasma decay time and consequently result in enhanced signal intensity.

关键词： LIBS laser produced plasma effect of external electric plasma parameters

Data-driven Operation Risk Assessment of Wind-integrated Power Systems via Mixture Models and Importance Sampling

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Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 437-445页

作者： Osama aslam Ansari Yuzhong Gong Weijia Liu Chi Yung Chung Department of Electrical and Computer Engineering University of SaskatchewanSaskatoonCanada

The increasing penetration of highly intermittent wind generation could seriously jeopardize the operation reliability of power systems and increase the risk of electricity outages. To this end, this paper proposes a novel data-driven method for operation risk assessment of wind-integrated power systems. Firstly, a new approach is presented to model the uncertainty of wind power in lead time. The proposed approach employs k-means clustering and mixture models(MMs) to construct time-dependent probability distributions of wind *** proposed approach can also capture the complicated statistical features of wind power such as multimodality. Then, a nonsequential Monte Carlo simulation(NSMCS) technique is adopted to evaluate the operation risk indices. To improve the computation performance of NSMCS, a cross-entropy based importance sampling(CE-IS) technique is applied. The CE-IS technique is modified to include the proposed model of wind *** method is validated on a modified IEEE 24-bus reliability test system(RTS) and a modified IEEE 3-area RTS while employing the historical data of wind generation. The simulation results verify the importance of accurate modeling of shortterm uncertainty of wind power for operation risk *** case studies have been performed to analyze the impact of transmission systems on operation risk indices. The computational performance of the framework is also examined.

关键词： Cross entropy mixture model Monte Carlo simulation operation risk power system reliability

Mass transfer area in a multi-stage high-speed disperser with split packing

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Chinese Journal of Chemical Engineering 2019年第4期27卷 772-780页

作者： Tao Ai aslam M.Mudassar Ziqi Cai Zhengming Gao State Key Laboratory of Chemical Resource Engineering School of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China

In this study, the mean droplet diameter in the cavity zone and the total mass transfer area of a multi-stage highspeed disperser(HSD) reactor with different packing combinations were measured and evaluated. The effects of rotational speed and packing radius, as well as the packing ring radius and numbers, on the mean droplet diameter and the total mass transfer area were evaluated. A model was established to calculate the mass transfer area in the cavity zone in the HSD reactor, and it was found that the packings contribute 61%–82% of the total mass transfer area. A correlation for predicting the mass transfer area in the packing zone was regressed by the dimensionless analysis method. An enhancement factor based on the mass transfer area in the packing zone was proposed to evaluate the effect of packing combination on mass transfer area. Two optimum packing combinations were proposed in consideration of the mean droplet diameter and the enhancement factor.

关键词： High-speed disperser Mean droplet diameter Mass transfer area Split packing

Tropospheric Scintillation Estimation Using 10 Years Meteorological Data

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China Communications 2015年第3期12卷 43-49页

作者： Muhammad Tahir PIAO Yan Muhammad aslam Azizur Rahim School of Electronics and Information Engineering Changchun University of Science and Technology School of Computer Science and Technology Dalian University of Technology School of Software Dalian University of Technology

This paper presents estimation of tropospheric scintillation based on ITU-R model from previous 10 years meteorological *** As(p) is critical in designing of microwave links for achieving optimal *** are many phenomenons that cause degradation to signal during transmission through the earth's atmosphere one of them is *** estimation is based on measurements of surface temperature T and relative humidity *** parameter for ITU-R scintillation estimation model is the monthly average of wet part of refractivity *** software tool is employed to show the results for tropospheric scintillation in various seasons for time percentage p and frequencies ranging from 4GHz to 20 GHz.

关键词： troposphere scintillation ITU-R fading meteorology

The New Neutrosophic Double and Triple Exponentially Weighted Moving Average Control Charts

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 373-391页

作者： Ambreen Shafqat Muhammad aslam Muhammad Saleem Zameer Abbas Department of Statistics and Financial Mathematics School of ScienceNanjing University of Science and TechnologyNanjing210094China Department of Statistics University of SargodhaSargodha40100Pakistan Department of Statistics Faculty of ScienceKing Abdulaziz UniversityJeddah21551Saudi Arabia Department of Industrial Engineering Faculty of Engineering-RabighKing Abdulaziz UniversityJeddah21589Saudi Arabia Goverment Ambala Muslim Graduate College Sargodha40100Pakistan

The concept of neutrosophic statistics is applied to propose two monitoring schemes which are an improvement of the neutrosophic exponentially weighted moving average(NEWMA)*** this study,two control charts are designed under the uncertain environment or neutrosophic statistical interval system,when all observations are undermined,imprecise or *** are termed neutrosophic double and triple exponentially weighted moving average(NDEWMA and NTEWMA)control *** the proficiency of the proposed chart,Monte Carlo simulations are used to calculate the run-length characteristics(such as average run length(ARL),standard deviation of the run length(SDRL),percentiles(P_(25),P_(50),P_(75)))of the proposed *** structures of the proposed control charts are more effective in detecting small shifts while these are comparable with the other existing charts in detecting moderate and large *** simulation study and real-life implementations of the proposed charts show that the proposed NDEWMA and NTEWMA charts perform better in monitoring the process of road traffic crashes and electric engineering data as compared to the existing control ***,the proposed charts will be helpful in minimizing the road accident and minimizing the defective ***,the proposed charts are more acceptable and actual to apply in uncertain environment.

关键词： Exponentially weighted moving average(EWMA) double EWMA triple EWMA neutrosophic control chart run-length

Analysis of migraine in mutlicellular organism based on trapezoidal neutrosophic cubic hesitant fuzzy TOPSIS method

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维普期刊数据库

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International Journal of Biomathematics 2019年第8期12卷 49-74页

作者： Aliya Fahmi Muhammad aslam Saleem Abdullah Department of Mathematics Hazara University Mansehra Pakistan Department of Mathematics College of Sciences King Khalid UniversityAbhaSaudi Arabia Department of Mathematics Abdul Wall Khan University MardanPakistan

In this paper,we define a new idea of trapezoidal neutrosophic cubic hesitant fuzzy number based on migraine *** define and the migraine diseases on trapezoidal neutrosophic cubic hesitant fuzzy number and operational laws of trapezoidal neutrosophic cubic hesitant fuzzy number and hamming distance of *** new concept of trapezoidal neutrosophic cubic hesitant fuzzy TOPSIS method is ***,we extend MCDM method based on the trapezoidal neutrosophic cubic hesitant fuzzy TOPSIS ***,an illustrative example is given to verify and demonstrate the practicality and effectiveness of the proposed method.

关键词： Migraine trapezoidal neutrosophic cubic hesitant fuzzy number operational laws MCDM trapezoidal neutrosophic cubic hesitant fuzzy TOPSIS method numerical application

A Comparison of Image Processing Techniques for Optical Interference Fringe Analysis

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维普期刊数据库

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Photonic Sensors 2015年第4期5卷 304-311页

作者： Muhammad FAROOQ Aasma aslam Babar HUSSAIN Ghazanfar HUSSAIN Masroor IKRAM National Institute of Lasers and Optronics Lehtrar Road lslamabad 45650 Pakistan Hazara University Mansehra and NUST lslamabad 21300 Pakistan University of North Carolina at Charlotte Department of Electrical and Computer Engineering 9201 University City Boulevard Charlotte 28223 USA pakistan Institute of Engineering and Applied Sciences lslamabad 45650 Pakistan

We present a comparison of different techniques for the analysis of the shift and tilt in optical interference fringes. Fringe center, Radon transform, and Gaussian approximation methods are used for fringe analysis. We have measured the tilt and shift between two relevant fringe pattems. The error in tilt measurement was about 2%, and the displacement of the order of few nanometers was measured by the fringe shift analysis. The comparison between the techniques is analyzed with respect to percentage error.

关键词： Interferometry fringes tilt shift imaging

New solitary wave and other exact solutions of the van der Waals normal form for granular materials

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Journal of Ocean Engineering and Science 2022年第2期7卷 170-177页

作者： Asim Zafar Tahir Mushtaq aslam Malik Ahmet Bekir Department of Mathematics COMSATS University IslamabadVehari CampusPakistan Department of Mathematics University of the PunjabLahorePakistan Neighbourhood of Akcaglan Imarli StreetNumber:28/426030EskisehirTurkey

The investigation of exact solitary wave solutions to the nonlinear partial differential equation plays an important role to understand any physical phenomena in diverse applied *** current work is re-lated to the most prominent nonlinear model named as the van der Waals normal form that appeared naturally and also industrially for the granular *** oceanography,the sea ice,sand and snow are some examples of aforesaid matter among *** employ two novel integration approaches named as the simplest equation method and the exp a function method to explore the above mentioned van der Waals *** a backlash,many new solitary waves and other exact solutions are *** ob-tained results depict that the used approaches are simple and effective to deal with nonlinear ***,the numerical simulation of some solutions via two and three dimension graphical configurations are presented for certainty and exactness.

关键词： Van der Waals equation Novel integration schemes Solitary wave solutions