scholarly journals Concise Robust Control of Marine Engine Speed Based on Backstepping and Its Fuzzy Comprehension

Complexity ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Lijun Wang ◽  
Sisi Wang
Keyword(s):  
Robust Control ◽  
Engine Speed ◽  
Closed Loop ◽  
Fuzzy Inference ◽  
Design Method ◽  
Research Literature ◽  
Parameter Determination ◽  
Engineering Practice ◽  
Ocean Engineering ◽  
Marine Engine

In this paper, a concise robust control law based on Backstepping for marine engine speed regulation is presented with the uniform asymptotic stability of the closed-loop system proved by Lyapunov synthesis, and the control parameters have obvious physical meaning. Furthermore, parameter determination method is given by virtue of closed-loop gain shaping algorithm. To overcome the perturbation due to load or interference change, variable universe fuzzy inference is introduced to optimize the control system on-line. Compared with the existing research literature, the design method and performance of the controller are more in line with the ocean engineering practice. The results of the simulations of the proposed controller are presented and compared.

Main Circuit Parameter Design of Permanent Magnetic Direct-Drive Wind Power Generating System

2013 ◽  
Vol 722 ◽  
pp. 107-111
Author(s):  
Wei Wei Li ◽  
Qing Hua Gao
Keyword(s):  
Wind Power ◽  
Design Method ◽  
Engineering Practice ◽  
Circuit Parameter ◽  
Direct Drive ◽  
Converter Topology ◽  
Dc Bus ◽  
Bus Voltage ◽  
Filter Capacitor ◽  
Generating System

Design method of main circuit parameter based on theoretical calculation and engineering practice is developed for permanent magnetic direct-drive wind power generating system with dual PWM converter topology. DC bus voltage, DC bus filter capacitor, rating value of power electronic devices and gird-side LCL filter parameters are calculated for an experimental wind power generating system. Hardware platform is built using calculated parameters, and the experimental results show that the design method is viable and expected design goal is achieved.

The Research and Application on Design Method for “Virtual Terminal” of Smart Substation

2014 ◽  
Vol 1070-1072 ◽  
pp. 1418-1422
Author(s):  
Hao Ren ◽  
Qi Wei Du ◽  
Ren Hui Dou ◽  
Zhi Qiang Yao
Keyword(s):  
Design Method ◽  
Control Device ◽  
Flow Diagram ◽  
Engineering Practice ◽  
Fiber Network ◽  
Traditional Concept ◽  
Connection Line ◽  
Point To Point ◽  
Digital Protection ◽  
Smart Substation

According to the new changes brought out by the smart substation, including disappearance of the traditional concept of terminal and replacement of the original point to point cable connection by optical fiber network, a new design method of GOOSE “virtual terminal” is put forward. The method contains GOOSE “virtual terminal”, virtual terminal logic connection line, GOOSE configuration table and virtual terminal information flow diagram, and solves some problems of digital protection, measurement and control device, such as without contact, no terminal, no wiring etc. of GOOSE information. The design method was applied in the engineering practice of the south of Changshu 500kV smart substation in Suzhou, and the effect of designing was very good.

scholarly journals Sensor-less Brushed DC Motor Speed Control with Intelligent Controllers

2021 ◽  
Vol 20 ◽  
pp. 140-148
Author(s):  
Amir Salmaninejad ◽  
Rene V. Mayorga
Keyword(s):  
Closed Loop ◽  
Fuzzy Logic Controller ◽  
Fuzzy Inference ◽  
Mechanical Load ◽  
Dc Motor ◽  
Closed Loop Control ◽  
Motor Speed ◽  
Motor Shaft ◽  
Loop Control ◽  
Intelligent Controllers

A Direct Current (DC) Motor is usually supposed to be operated at a desired speed even if the load on the shaft is exposed to changes. One of its applications is in automatic door controllers like elevator automatic door drivers. Initially, to achieve this aim, a closed loop control can be applied. The speed feedback is usually prepared by a sensor (encoder or tachometer) coupled to the motor shaft. Most of these sensors do not always perform well, especially in elevator systems, where high levels of noise, physical tensions of the mobile car, and maintenance technicians walking on the car, make this environment too noisy. This Paper presents a new approach for precise closed loop control of the DC motor speed without a feedback sensor, while the output load is variable. The speed here is estimated by the Back EMF (BEMF) voltage obtained from the armature current. First, it is shown that a PID controller cannot control this process alone, and then intelligent controllers, Fuzzy Logic Controller (FLC) and Adaptive Neuro Fuzzy Inference Systems (ANFIS), assisting PID are applied to control this process. Finally, these controllers’ performance subjected to a variable mechanical load on the motor shaft are compared.

scholarly journals Construction and Application of the Design Method of Cultural Products Based on the Meme of Liao dynasty ceramics

2020 ◽  
Vol 179 ◽  
pp. 02016
Author(s):  
Yue Zhu ◽  
Cheng-lein TENG
Keyword(s):  
Design Method ◽  
Research Literature ◽  
Roland Barthes ◽  
Cultural Products ◽  
Spatial Perspective ◽  
Related Research ◽  
The Past ◽  
Visual Elements ◽  
Liao Dynasty ◽  
Physical Representation

A design method of one cultural product based on the meme of artifacts was constructed and applied to the development and design of cultural products. Firstly, the paper puts forward that the outer “tangible” level of the “spatial perspective” of culture corresponds to the dominant meme, as well as the mid “behavioral” level and Inner “intangible” level correspond to the hidden meme according to the theories of meme and the “spatial perspective” of culture. What’s more, the meme was extracted according to the appearance of Liao dynasty ceramics and related research literature. Secondly, based on the extracted meme of Liao dynasty ceramics, the design method of cultural products was constructed by applying the theoretical framework two orders of the signification of Roland Barthes Semiotics to explore the extended cultural meaning of meme and apply its translation to the design of cultural products. The design method of cultural products constructed by this Institute is more inclusive of the intrinsic level of artifacts than that in the past, which only created cultural products that focus on the physical representation of the visual elements. It is an attempt to provide designers of cultural products and students with design background with a design method of cultural products for reference.

scholarly journals On the Robust Multiple Objective Control with Simultaneous Pole Placement in LMI Regions

2021 ◽  
Vol 20 ◽  
pp. 272-280
Author(s):  
Antonis Vouzikas ◽  
Alexandros Gazis
Keyword(s):  
Robust Control ◽  
Complex Plane ◽  
Uncertain Systems ◽  
Closed Loop ◽  
Pole Placement ◽  
Multiple Objective ◽  
Control Laws ◽  
Control Approach ◽  
Guaranteed Cost ◽  
Objective Control

This article studies the problem of designing robust control laws to achieve multiple performance objectives for linear uncertain systems. Specifically, in this study we have selected one of the control objectives to be a closed-loop pole placement in specific regions of the left-half complex plane. As such, a guaranteed cost based multi-objective control approach is proposed and compared with the H_2/H_∞control by means of an application example

scholarly journals Control of Rotary Cranes Using Fuzzy Logic

2001 ◽  
Author(s):  
Amjed A. Al-mousa ◽  
Ali H. Nayfeh ◽  
Pushkin Kachroo
Keyword(s):  
Fuzzy Logic ◽  
Closed Loop ◽  
Fuzzy Logic Controller ◽  
Fuzzy Inference ◽  
Fuzzy Controller ◽  
Operating Conditions ◽  
Building Construction ◽  
Loop Control ◽  
Industrial Structures ◽  
Inference Engines

Abstract Rotary cranes (tower cranes) are common industrial structures that are used in building construction, factories, and harbors. These cranes are usually operated manually. With the size of these cranes becoming larger and the motion expected to be faster, the process of controlling them became difficult without using automatic control methods. In general, the movement of cranes has no prescribed path. Cranes have to be run under different operating conditions, which makes closed-loop control preferable. In this work a fuzzy logic controller is introduced with the idea of split-horizon; that is, fuzzy inference engines (FIE) are used for tracking the position and others are used for damping the load oscillations. The controller consists of two independent controllers: radial and rotational. Each of these controllers has two fuzzy inference engines (FTEs). Computer simulations are used to verify the performance of the controller. Three simulation cases are introduced: radial, compound, and damping. The results from the simulations show that the fuzzy controller is capable of keeping the load-oscillation angles small throughout the maneuvers while completing them in a relatively reasonable time.

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