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第36届中国控制会议

作者： Syed Ussama Ali raza samar M.Zamurad Shah Center of Excellence in Science and Applied Technologies (CESAT)

ISBN: (纸本)9781538629185

The lateral guidance objective is to derive the cross track error towards zero with graceful and stable maneuvers and then to keep it as minimum as possible. A nonlinear sliding surface based lateral guidance scheme is proposed here for Unmanned Aerial Vehicles(UAVs) application with limited actuation. Following the inner(control) and outer(guidance)loop structure, the proposed guidance scheme resides in outer loop and generates reference bank angle commands for the inner control loop. The proposed 1 order SMC algorithm based on nonlinear sliding surface is derived using the kinematic equations for bank-to-turn vehicles. Mathematical proof of existence of sliding mode and actuation boundedness of the closed-loop is also provided. The proposed guidance and control system performance is verified via simulation results for different scenario. A high fidelity nonlinear 6-degrees-offreedom(6-dof) scaled Yak-54 UAV mathematical model is used for flight simulations. Simulation results validated the effectiveness and performance of the proposed lateral guidance scheme.

关键词： Stability analysis Unmanned aerial vehicles Manifolds Actuators Mathematical model Sliding mode control Robustness

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Nonlinear Sliding Manifold for High Performance Lateral Guidance of UAV

Nonlinear Sliding Manifold for High Performance Lateral Guid...

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第36届中国控制会议

作者： Syed Ussama Ali raza samar M.Zamurad Shah Center of Excellence in Science and Applied Technologies （CESAT）

ISBN: (纸本)9781538629185

This paper presents a novel guidance algorithm for UAVs to follow a 2-D ground track by controlling the lateral cross track deviations. The guidance framework based on sliding mode theory is presented to solve the two dimensional path-following problem. To control the lateral track error of the vehicle during flight, the guidance algorithm generates reference bank angle commands for the vehicle control system i.e., by executing roll maneuvers. Novel nonlinear high performance sliding surface is proposed to reduce the lateral cross track error efficiently. Subsequently, 1storder sliding mode guidance logic is then devised using the proposed manifold for generating reference bank angle commands. Stability of the proposed nonlinear manifold is proved using Lyapunov *** boundedness is proved to avoid saturation of control signals. Effectiveness of the proposed algorithm is shown via simulation results for a research scaled YAK-54 UAV. Different scenarios（consisting of both small and large lateral errors）in simulation validates the proposed guidance framework and illustrates the effectiveness of the algorithm.

关键词： Manifolds Unmanned aerial vehicles Stability analysis Sliding mode control Kinematics Switches

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Adaptive Sliding Mode Roll Control of a Canard-Controlled Missile

Adaptive Sliding Mode Roll Control of a Canard-Controlled Mi...

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2010 Chinese Control and Decision Conference

作者： M.Zamurad Shah raza samar A.I.Bhatti Mohammad Ali Jinnah University IslamabadPakistan

This work is meant to design a roll controller for a short range missile with a free-spinning tail using the sliding mode control *** canards located near the nose of the missile provide aerodynamic ***/yaw stability is achieved through four rotating fins located at the tail of the *** of the missile dictates the whole trajectory in the atmosphere where dynamic pressure varies between 0 and 7 *** the missile can be fired at different launch angles,which implies that the profile of dynamic pressure is not *** strategy strongly depends on dynamic pressure in the case of canard-controlled *** the case of varying dynamic pressure,design of a robust roll controller that can keep roll angle near zero is a challenging *** this paper,a roll controller is designed for a canard-controlled short range missile using sliding mode control *** is done in some control parameters to cater the variation in dynamic pressure and different launch *** robustness of the roll controller is tested in the presence of aerodynamic and other *** is established that the proposed roll controller is capable of rejecting aerodynamic and other disturbances and keep the roll angle close to zero.

关键词： Missile sliding mode control adaptive control autopilot aerodynamics canards.

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Robust Level Flight Control Design For Scaled Yak-54 Unmanned Aerial Vehicle using Single Sliding Surface.

Robust Level Flight Control Design For Scaled Yak-54 Unmanne...

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第24届中国控制与决策会议

作者： Ussama Ali M. Zamurad Shah raza samar Aamer Iqbal Bhatti Faculty of Electronic Engineering Mohammed Ali Jinnah University

This paper deals with devising robust nonlinear control strategy for benchmark system of scaled Yak-54 Unmanned Aerial Vehicle. Authors considered the applications of sliding mode controllers to the longitudinal flight dynamics of the Yak-54 UAV for executing maneuvers over full flight envelope. Unlike the classical technique of the two sliding surfaces for the two loops a single surface is selected for the level flight. Control of unmanned aerial vehicle involves the problem of incomplete measurements, modeling uncertainties and external disturbances which makes flight dynamic analysis and control system design difficult. We present an innovative robust control strategy based on powerful tools provided by the theory of sliding mode control algorithms. First order sliding mode controller are designed but they provide chattering at the control input thus a non linear second order super twisting controller is used to provide chattering free control with improved robust stabilization.

关键词： Sliding Mode Control SMC Higher Order Sliding Mode Control HOSM Strong Reachability Condition SRC

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Robust Nonlinear Control Design For Scaled Yak-54 Unmanned Aerial Vehicle

Robust Nonlinear Control Design For Scaled Yak-54 Unmanned A...

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第26届中国控制与决策会议

作者： Ussama Ali M.Zamurad Shah Aamer Iqbal Bhatti raza samar Faculty of Electronic Engineering Mohammed Ali Jinnah University

In this work, the authors consider the applications of sliding mode controllers to the longitudinal flight dynamics of the benchmark system of scaled Yak-54 Unmanned Aerial Vehicle for executing maneuvers over full flight *** of unmanned aerial vehicle involves the problem of incomplete measurements, modeling uncertainties and external disturbances. Sliding mode control provides good precision and robustness to the aforementioned factors. First order sliding mode controller are designed but they provide chattering at the control input thus a non linear second order super twisting controller is used to provide chattering free control with improved performance for the robust stabilization of pitch angle and control of its altitude. The simulation results indicate good tracking and regulation control of the vehicle.

关键词： Sliding Mode Control SMC Higher Order Sliding Mode Control HOSM Strong Reachability Condition SRC

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Week Ahead Electricity Power and Price Forecasting Using Improved DenseNet-121 Method

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Computers, Materials & Continua 2022年第9期72卷 4249-4265页

作者： Muhammad Irfan Ali raza Faisal Althobiani Nasir Ayub Muhammad Idrees Zain Ali Kashif Rizwan Abdullah Saeed Alwadie Saleh Mohammed Ghonaim Hesham Abdushkour Saifur Rahman Omar Alshorman samar Alqhtani Electrical Engineering Department College of EngineeringNajran University Saudi ArabiaNajran61441Saudi Arabia Department of Computer Science COMSATS University IslamabadWah Campus22060Pakistan Faculty of Maritime Studies King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Computer Science Federal Urdu University of ArtsScience and TechnologyIslamabad44000Pakistan School of Electrical Engineering and Computer Science National University of Science and TechnologyIslamabad44000Pakistan Department of Computer Science and Engineering University of Engineering and TechnologyNarowal CampusLahore54000Pakistan Department of Electrical Engineering HITEC UniversityTaxila47080Pakistan College of Computer Science and Information Systems Najran UniversityNajran61441Saudi Arabia

In the Smart Grid(SG)residential environment,consumers change their power consumption routine according to the price and incentives announced by the utility,which causes the prices to deviate from the initial ***,electricity demand and price forecasting play a significant role and can help in terms of reliability and *** to the massive amount of data,big data analytics for forecasting becomes a hot topic in the SG *** this paper,the changing and non-linearity of consumer consumption pattern complex data is taken as *** minimize the computational cost and complexity of the data,the average of the feature engineering approaches includes:Recursive Feature Eliminator(RFE),Extreme Gradient Boosting(XGboost),Random Forest(RF),and are upgraded to extract the most relevant and significant *** this end,we have proposed the DensetNet-121 network and Support Vector Machine(SVM)ensemble with Aquila Optimizer(AO)to ensure adaptability and handle the complexity of data in the ***,the AO method helps to tune the parameters of DensNet(121 layers)and SVM,which achieves less training loss,computational time,minimized overfitting problems and more training/test *** evaluation metrics and statistical analysis validate the proposed model results are better than the benchmark *** proposed method has achieved a minimal value of the Mean Average Percentage Error(MAPE)rate i.e.,8%by DenseNet-AO and 6%by SVM-AO and the maximum accurateness rate of 92%and 95%,respectively.

关键词： Smart grid deep neural networks consumer demand big data analytics load forecasting price forecasting

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