Aerodynamic analysis and dynamic modeling of small horizontal axis wind turbine

Khan, Sikandar; Khan, Afzal; Irfan, Muhammad; Hussain, Shah

doi:10.1109/icrai.2012.6413406

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…The control system of an unmanned underwater vehicle acts as the brain of the system. Various applications require efficient control system design for their operation [29][30][31][32][33]. The vehicle's security and reliability depend on the control system.…”

Section: Methodsmentioning

confidence: 99%

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

Bashir,

Khan,

Iqbal

et al. 2023

Sustainability

Self Cite

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Unmanned underwater vehicles (UUVs) have become increasingly popular in recent years due to their use in various applications. The motivations for using UUVs include the exploration of difficult and dangerous underwater environments, military tasks in mine detection, intelligence gathering and surveillance, the inspection of offshore oil and gas infrastructure in the oil and gas industry, scientific research for studying marine life, and the search and rescue of missing persons or submerged airplanes or boats in underwater environments. UUVs offer many advantages in achieving the desired applications with increased safety, efficiency, and cost-effectiveness. However, there are also several challenges associated with their communication, navigation, power requirements, maintenance, and payload limitations. These types of vehicles are also prone to various disturbances caused by currents of the ocean, propulsion systems, and unmolded uncertainties. Practically, it is a challenging task to design a controller that will ensure optimal performance under these conditions. Therefore, the control system design is of prime importance in the overall development of UUVs. Also, the UUV controller receives input from different sensors, and the data from these sensors are used by the controller to perform different tasks. The control systems of UUVs should take into account all uncertainties and make them stable so that all sensors can perform optimally. This paper presents a complete review of different control system design algorithms for UUVs. The basic logic designs of several control system algorithms are also presented. A comparison is made based on reliability, robustness, precession, and the ability of the controller to handle the nonlinearity that is faced by UUVs during their missions. Simulation and experimental results are thoroughly studied to gain insight into each algorithm. The advantages and disadvantages of each algorithm are also presented, which will facilitate the selection of a suitable algorithm for the control system design of UUVs.

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Section: Methodsmentioning

confidence: 99%

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

Bashir,

Khan,

Iqbal

et al. 2023

Sustainability

Self Cite

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“…As a widely used modeling technology, the virtual prototype model created by program MSC. ADAMS (automatic dynamic analysis of mechanical systems) can reflect the characteristics of actual products, including appearance, spatial relationship, kinematics and dynamics characteristics [8,[27][28][29][30][31]. With the help of this technology, the mechanical system model can be built on the computer, accompanied by 3D visualization processing to simulate the kinematic characteristics of the system in the real environment [32][33][34].…”

Section: Virtual Prototype Modeling and Simulationmentioning

confidence: 99%

Kinematic Analysis and Virtual Prototype Simulation of the Thrust Mechanism for Shield Machine

et al. 2022

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The hydraulic thrust system of the shield machine is used for driving forward and pose adjustment. It is of great significance to figure out the thrust mechanism and motion characteristics of the shield machine to ensure the safety of tunnel excavation. This study aims to develop a model to explore the influence of thrust cylinder advancement on the motions of the shield machine. Firstly, the study carried out mechanism analysis of the thrust mechanism for the shield machine and established a method to describe the position and attitude of the shield machine during the tunneling process by the homogeneous transformation matrix. Then, a new inverse kinematic model was proposed to quantify the relationship between the telescoping movements of cylinders and shield machine motions, and the Jacobian matrix was derived to solve the instantaneous kinematics analysis. Furthermore, a virtual prototype model was developed to simulate the kinematic behavior of the shield machine and validate the accuracy of the kinematic model. The model provides the basic constraint relations for the practical position control system and lays a strong foundation for the dynamic model and automatic trajectory tracking control of shield machines for future studies. Based on the proposed model, the displacement, velocity, and acceleration of cylinders that drive the shield machine to the target motions can be solved exactly. It can provide a reference for the pose control of the shield machine during the practical shield tunneling.

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“…The contact force between the spherical waste and the identification platform is equal to the sum of the elastic force and friction [33]. The impact function in Adams software was adopted for calculation of the contact force between the sphere and the identification platform [34][35][36]. Collision between the spherical waste and the platform was equivalent to a nonlinear equivalent spring damping model based on the penetration depth [37,38].…”

Section: Contacts and Friction Coefficientmentioning

confidence: 99%

Design and Simulation of Small-Scale Waste Separation and Sorting Equipment

Zhang

2022

Processes

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Environmental pollution is currently a major concern globally owing to increase in the world population and advances in industrialization. An automatic waste separation and sorting equipment for small-scale waste sorting systems was constructed in this paper. A two-DoF (two-degree-of-freedom) parallel sorting mechanism as well as a belt waste separation and feeding mechanism were designed, and 3D models of the mechanism were established. Finite element analysis (FEA) was conducted for the sorting mechanism, and kinematic and dynamic analysis and numerical simulation were performed for the waste and sorting mechanism. The simulation results demonstrated that the spherical waste did not roll out of the platform after leaving the slideway. The waste was stabilized at the center of the platform within a short duration with movement of the collecting mechanism of the platform. The system was optimized to reduce waste separation and sorting time. Stability of the waste motion in the equipment as well as efficiency of the system were significantly improved after optimization. The results showed that the designed equipment can complete separation and sorting of waste materials at lower output power.

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Aerodynamic analysis and dynamic modeling of small horizontal axis wind turbine

Cited by 14 publications

References 6 publications

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

A Review of the Various Control Algorithms for Trajectory Control of Unmanned Underwater Vehicles

Kinematic Analysis and Virtual Prototype Simulation of the Thrust Mechanism for Shield Machine

Design and Simulation of Small-Scale Waste Separation and Sorting Equipment

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