The article deals with the issue that there is no study on the designing of switched reluctance electric vibration drives. The mathematical models of an electromechanical converter and electronic commutator with a mot...
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ISBN:
(纸本)9781538643075
The article deals with the issue that there is no study on the designing of switched reluctance electric vibration drives. The mathematical models of an electromechanical converter and electronic commutator with a motor phase 90-degree switching algorithm are presented. The interdisciplinary calculation of the built models was carried out. The results of modeling and simulation are motor winding currents and induced voltage graphs. The experimental prototype of the switched reluctance vibration drive with the microprocessor-based control system is developed and made. An experimental research that proves the adequacy of the models has been performed.
Compared with the conventional adaptive optics (AO) system, the wavefront sensorless (WFSless) AO system need not to measure the wavefront and reconstruct it. It is simpler than the conventional AO in system architect...
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ISBN:
(纸本)9781510613966;9781510613959
Compared with the conventional adaptive optics (AO) system, the wavefront sensorless (WFSless) AO system need not to measure the wavefront and reconstruct it. It is simpler than the conventional AO in system architecture and can be applied to the complex conditions. Based on the analysis of principle and system model of the WFSless AO system, wavefront correction methods of the WFSless AO system were divided into two categories: model-free-based and model-based control algorithms. The WFSless AO system based on model-free-based control algorithms commonly considers the performance metric as a function of the control parameters and then uses certain control algorithm to improve the performance metric. The model-based control algorithms include modal control algorithms, nonlinear control algorithms and control algorithms based on geometrical optics. Based on the brief description of above typical control algorithms, hybrid methods combining the model-free-based control algorithm with the model-based control algorithm were generalized. Additionally, characteristics of various control algorithms were compared and analyzed. We also discussed the extensive applications of WFSless AO system in free space optical communication (FSO), retinal imaging in the human eye, confocal microscope, coherent beam combination (CBC) techniques and extended objects.
Robotic assistive devices are popular in research and medical fields for their potential to automate tasks or to improve the quality of life of disabled users. They may be used for physical therapy, as exoskeletons, t...
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Robotic assistive devices are popular in research and medical fields for their potential to automate tasks or to improve the quality of life of disabled users. They may be used for physical therapy, as exoskeletons, teleoperation devices, or to assist users in tasks in their home. Common methods for controlling these devices use both broad and difficult-to-maintain gesturing or peripherals such as mouse pointers or joysticks which are not designed for the task required of them. In addition, these devices are often not adaptive to the user and can only be minimally customized. This article proposes a fusion of infrared camera data for stress detection with Kinect body tracking to develop a customizable control method for a robotic limb. Devices such as the Microsoft Kinect have seen use in physical therapy applications but only some use in teleoperation. In addition, studies have shown potential in using infrared imaging to detect human stress. The objectives of this study are to design and build an interactive interface and adaptive control system and to evaluate its performance. Stress detection using infrared was tested using a Compix 222 and neural networks to categorize emotional states. Kinect v2 accuracy and reliability was tested by comparing joint positions to detected angles and perceived output angles. Our work suggests that infrared imaging and the Kinect v2 show potential to make a real-time adaptive system in which a control program can adapt its output when it detects stress from its user.
In this paper a comparative study of four different control algorithms(instantaneous power theory (p-q), power balance theory (PBT), Icos phi theory and synchronous current detection method (SCDM) of a three- phase th...
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ISBN:
(纸本)9781538609903
In this paper a comparative study of four different control algorithms(instantaneous power theory (p-q), power balance theory (PBT), Icos phi theory and synchronous current detection method (SCDM) of a three- phase three wire shunt active power filter (SAPF) for non-linear loads is presented for power quality improvement. With all algorithms, the control generates a reference current and compared with filter injected current through a current controller where the current controller uses sinusoidal pulse width modulation technique for generating six pulses to drive IGBT to make the source current sinusoidal and reduce the total harmonic distortion (THD) less than 5% for meeting the IEEE standard. The simulation results demonstrate that the Icos phi algorithm gives the best reduction of THD compared with other algorithms.
This paper deals with problematic of realization and implementation of control algorithms for laboratory model of electric drive of traction drive with medium frequency transformer MFT supplied by high voltage matrix ...
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ISBN:
(纸本)9781467386982
This paper deals with problematic of realization and implementation of control algorithms for laboratory model of electric drive of traction drive with medium frequency transformer MFT supplied by high voltage matrix converter MC. Output (from secondary winding from MFT) is rectified by active rectifier and it used form voltage source rectifier. control algorithms for these parts are implemented into digital system with digital signal processor. Practical using of this electric drive is possibility of reducing of mass of traction transformer in locomotives for system 15kV/16.7Hz and 25kV/50Hz etc.
The present study investigates the performance of fixed parameter control algorithms on wind-excited high-rise structures equipped with semi-active tuned mass dampers of variable damping. It has been demonstrated that...
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The present study investigates the performance of fixed parameter control algorithms on wind-excited high-rise structures equipped with semi-active tuned mass dampers of variable damping. It has been demonstrated that the algorithms that increase significantly the performance of the controlled structure do so at the expense of damper strokes. When the maximum damper strokes are capped to progressively lower limits, the efficacy of different algorithms, measured through a number of performance objectives, drastically alters totally changing the performance ranking of them and pointing out the need for an extensive study of the interplay between loading, control algorithm and allowable stroke within the design of semi-active tuned mass dampers devices. 2015 The Authors. The Structural Design of Tall and Special Buildings published by John Wiley & Sons Ltd.
This paper describes the control algorithms for electric drive with single phase matrix converters supplied medium frequency converter for traction purpose. Described control algorithms realize the control of active a...
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ISBN:
(纸本)9788026103868
This paper describes the control algorithms for electric drive with single phase matrix converters supplied medium frequency converter for traction purpose. Described control algorithms realize the control of active and reactive power, output voltage, reduce harmonic disturbance in input current and oscillation of voltage on input filter etc. These control algorithms were implemented into multiprocessor control system with DSP for small-scale prototype as physical model in laboratory.
First, the basic structure and principle of quadrotor UAV and its practical applications are introduced. Then, some control algorithms are also presented, such as, PID, LQR/LQG, H-infinity, sliding mode, feedback line...
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ISBN:
(纸本)9781467370059
First, the basic structure and principle of quadrotor UAV and its practical applications are introduced. Then, some control algorithms are also presented, such as, PID, LQR/LQG, H-infinity, sliding mode, feedback linearization, back stepping, model predictive, robust, adaptive, nested saturation, fuzzy logic, neural network, reinforcement learning, iterative learning, memory and brain emotional learning-based intelligent controllers, and the merits and drawbacks of them are analyzed. At last, we predict the main research direction on the future researches of quadrotor UAV.
One of the important aspects of modern animal husbandry farms operations is to provide optimal and healthy environment for the animals and to increase productivity by precise indoors environment control, achieving low...
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One of the important aspects of modern animal husbandry farms operations is to provide optimal and healthy environment for the animals and to increase productivity by precise indoors environment control, achieving lower energy consumption of the buildings and optimal amounts of food intake of the animals. This complex task can be achieved by the proposed Cost Oriented Cyber Physical System (COCPS) for intelligent control of animal husbandry farms. By implementing the described control algorithms, the COCPS by monitoring a wide range of indoor environment parameters can control a large variety of subsystems, in order to create beneficial and healthy environment for the animals and increase their productivity. Copyright (C) 2022 The Authors.
Quadcopter drones have become increasingly popular because of their versatility and usefulness in various applications, such as surveillance, delivery, and search and rescue operations. Weather conditions and obstacle...
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Quadcopter drones have become increasingly popular because of their versatility and usefulness in various applications, such as surveillance, delivery, and search and rescue operations. Weather conditions and obstacles can undoubtedly pose challenges for drone flights, sometimes causing the loss of one or two propellers. This is a significant challenge as the loss of one or more propellers leads to a sudden loss of control, potentially resulting in a crash, which must be addressed through advanced control strategies. Therefore, this article develops and implements a fractional-order control algorithm to enhance quadrotor drones' safety and resilience during propeller failure scenarios. The research encompasses the complexities of quadrotor dynamics, fractional-order control theory, and existing methodologies for ensuring safe drone landings. The study emphasizes case validation on experimental results, where four distinct cases were tested using PID and Fractional-order PID (FOPID) controllers. These cases involve various simulated failure conditions to assess the performance and adaptability of the developed control algorithms. The results show the proposed FOPID control's superior robustness and adaptability compared to traditional PID controllers. These offer significant advancements in navigating dynamic environments and managing disruptive elements introduced during propeller failure simulations in drone control technology.
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