A Fuzzy Self-Learning Control Method with Application to Hydroforming Processes

1995 ◽  
Vol 117 (3) ◽  
pp. 297-303 ◽  
Author(s):  
H. J. Park ◽  
H. S. Cho
Keyword(s):  
Tracking Control ◽  
Control Method ◽  
Learning Control ◽  
Design Parameters ◽  
High Quality ◽  
Control Scheme ◽  
Series Of Experiments ◽  
Quality Of Products ◽  
Self Learning

In this paper, a tracking control of hydroforming pressure which is used for precision forming of sheet metals, is considered. In this process, forming pressure of the process needs to be strictly controlled to ensure high quality of the forming products. However, conventional control method alone makes it difficult to achieve satisfactory control performance due to complexities and uncertainties of the process. To overcome this problem, a fuzzy self-learning control scheme is proposed. In the proposed scheme, a series of experiments were performed to show the effectiveness of the proposed control scheme and to investigate influence of the design parameters of the proposed algorithm. The experimental results show that the proposed fuzzy self-learning controller can guarantee good tracking performance and thus, high quality of products even when knowledge of the process is vague, imprecise and fragmentary.

scholarly journals Visual Tracking Control of Cable-Driven Hyper-Redundant Snake-Like Manipulator

2021 ◽  
Vol 11 (13) ◽  
pp. 6224
Author(s):  
Qisong Zhou ◽  
Jianzhong Tang ◽  
Yong Nie ◽  
Zheng Chen ◽  
Long Qin
Keyword(s):  
Visual Tracking ◽  
Tracking Control ◽  
Control Method ◽  
Adaptive Optimization ◽  
Tracking Errors ◽  
Kinematics Model ◽  
Compound Control ◽  
Original Intention ◽  
Control Scheme ◽  
Specific Geometry

The cable-driven hyper-redundant snake-like manipulator (CHSM) inspired by the biomimetic structure of vertebrate muscles and tendons, which consists of numerous joint units connected adjacently driven by elastic materials with hyper-redundant DOF, performs flexible kinematic skills and competitive compound capability under complicated working circumstances. Nevertheless, the drawback of lacking the ability to perceive the environment to perform intelligently in complex scenarios leaves a lot to be improved, which is the original intention to introduce visual tracking feedback acting as an instructor. In this paper, a cable-driven snake-like robotic arm combined with a visual tracking technique is introduced. A visual tracking approach based on dual correlation filter is designed to guide the CHSM in detecting the target and tracing after its trajectory. Specifically, it contains an adaptive optimization for the scale variation of the tracking target via pyramid sampling. For the CHSM, an explicit kinematics model is derived from its specific geometry relationships and followed by a simplification for the inverse kinematics based on some assumption or limitation. A control scheme is brought up to combine the kinematics with visual tracking via the processing tracking errors. The experimental results with a practical prototype validate the availability of the proposed compound control method with the derived kinematics model.

scholarly journals Quality characteristics of spatial furniture

2009 ◽  
pp. 135-145 ◽  
Author(s):  
Dusan Skakic ◽  
Igor Dzincic
Keyword(s):  
Quality Control ◽  
Quality Characteristics ◽  
High Quality ◽  
Production Economy ◽  
Production Practice ◽  
Basic Quality ◽  
Quality Of Products ◽  
Quality Production

The quality of products represents one of the key aims of any modern organized production. In the production practice, it is essential to establish the optimal relationship between quality, production economy and delivery deadlines. Furniture quality is evaluated by three levels and they are: basic quality, high quality and especially high quality. The results presented in this paper are based on the sample measurements of chairs and tables during 2007 and 2008 at the Institute for Furniture Quality Control.

scholarly journals Directions for Improving the Quality of Products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl»

2020 ◽  
Vol 10 (513) ◽  
pp. 197-203
Author(s):  
O. I. Garafonova ◽  
◽  
I. F. Nechai ◽  
Keyword(s):  
Product Quality ◽  
Product Life Cycle ◽  
Quality Parameters ◽  
Quality Level ◽  
Business Organization ◽  
High Quality ◽  
The World ◽  
Developing Directions ◽  
Quality Of Products

In the world, product quality has long been one of the major instruments for ensuring the economic development of companies. Achieving high quality parameters, in turn, is an important part of the economic strategy of any success-oriented business organization. The article is aimed at developing directions for improving products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl». The object of the research is the quality of beer produced by PJSC «Beer and Non-Alcoholic Plant «Radomyshl». The assessment of the quality level of the selected product in accordance with the requirements of DSTU 3888:2015 was carried out using the following groups of indicators: microbiological, organoleptic and physic-chemical. The process of assessing the product quality parameters is presented, which consists of seven consecutive stages and is carried out throughout the product life cycle. The factors under the influence of which the quality of products are formed and which may cause deviation from the specified quality parameters are analyzed and structured. The defects that appear due to these factors have been identified. The basis for improving the quality of products is primarily a thorough study of changes in demand for the business organization products. Three groups of measures are singled out, with the help of which one can achieve the desired level of product quality, namely: technological, organizational and socio-economic. A complex of priority measures to improve the quality of products of PJSC «Beer and Non-Alcoholic Plant «Radomyshl» is proposed. The element of scientific novelty is the development of an algorithm for the implementation of measures to improve the quality of products. During the implementation of measures to improve the quality, it is necessary to carry out systematic monitoring and generate reports on the implementation of the project in order to make possible an adjustment of the final result.

The investigation on flight quality of tilt-rotor aircraft

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ke Lu ◽  
Shanyong Zhao ◽  
YUjie Ma ◽  
Shangjing Wu ◽  
Cheng da Su
Keyword(s):  
Tracking Control ◽  
Control Method ◽  
Quantitative Relationship ◽  
Explicit Model ◽  
Content Type ◽  
Tilt Rotor ◽  
Motion Modes ◽  
Aerodynamic Derivatives ◽  
Quality Specifications

Purpose This paper aims to present an investigation on flight quality analysis and design of tilt-rotor aircraft combined with corresponding flight quality specifications. Design/methodology/approach From the perspective of modal characteristics of tilt-rotor aircraft, it focuses on the analysis of the change rules of the longitudinal short-term motion mode, lateral roll convergence mode, spiral mode and Dutch roll mode. Then, the flight quality design research is carried out using the explicit model tracking control method. The quantitative relationship between flight quality requirements and explicit model is established. Accordingly, the closed-loop flight quality of XV-15 tilt-rotor aircraft is evaluated. Findings The stability of spiral mode is the result of the interaction of various aerodynamic derivatives and spiral instability occurs in helicopter mode. The other motion modes are stable in full flight mode and meet the requirements of level 1 specified in ADS-33E-PRF and MIL-F-8785C flight quality specifications. There is a quantitative relationship between flight quality requirements and explicit model, and the flight quality of tilt-rotor aircraft is improved through the explicit model tracking control method. Practical implications The presented analysis results showed the influence of motion modes and flight quality and the effectiveness of explicit model tracking control method in flight quality improvement, which could be considered as new information for further flight quality design of tilt-rotor aircraft. Originality/value The originality of the paper lies in the proposed design and analysis method of the flight quality of tilt-rotor aircraft from the direction of the influence of its aerodynamic derivatives and motion modes.

The Application of Iteration Learning Control in Silkworm Incubation Chamber System

2014 ◽  
Vol 571-572 ◽  
pp. 164-168
Author(s):  
Yin Jun Zhang
Keyword(s):  
Tracking Control ◽  
Iterative Learning Control ◽  
Control Method ◽  
Learning Rule ◽  
Learning Control ◽  
Chamber System ◽  
Egg Incubation ◽  
Incubation Chamber ◽  
Complicated Process ◽  
The Mathematical Model

Silkworm egg incubation is a very complicated process and is hard to establish the mathematical model. In order to improve the temperature and humidity of silkworm incubation chamber control method, the paper deal with the method of iteration learning control looking for expected input. Based on the summary of human experience, designing learning rule is given. The simulation result shows iterative learning control has ideal tracking control.

Tracking Control of Automatic Pipe Cutting Robot with Magnetic Binder

2006 ◽  
Vol 505-507 ◽  
pp. 1201-1206
Author(s):  
Sung Soo Rhim ◽  
Soon Geul Lee
Keyword(s):  
Tracking Control ◽  
Magnetic Force ◽  
Welding Process ◽  
Gravitational Effect ◽  
Welding Robot ◽  
Tracking Errors ◽  
Control Scheme ◽  
Repetitive Learning ◽  
Errors Analysis

An automatic pipe cutting/welding robot with a magnetic binder, which is named APCROM, is developed and its tracking control is studied in this paper. Using magnetic force the four-wheeled mobile robot binds itself to the pipe and executes automatic pipe cutting/welding process. As APCROM rotates around the cylindrical pipe laid in the gravitational field, the gravity effect on the movement of the robot varies. The varying gravitational effect deteriorates the tracking performance of the robot and degrades the quality of the pipe cutting/welding process. To maintain a constant velocity and consistent cutting/welding performance, the authors adopt a repetitive learning controller, which learns through practice the required effort to cancel the tracking errors. Analysis results and experimental results verify the effectiveness of the proposed control scheme.

scholarly journals Kaizen as a Method of Management Improvement in Small Production Companies

2015 ◽  
Vol 16 (2) ◽  
pp. 157-170 ◽  
Author(s):  
Barbara Kamińska
Keyword(s):  
Quality Management ◽  
Small Firms ◽  
Point Of View ◽  
Inexpensive Method ◽  
High Quality ◽  
High Position ◽  
Small Production ◽  
Quality Of Products ◽  
Management Improvement

Abstract„Quality is not everything but everything is nothing without quality”. The famous quotation from K. Ishikawa brings to our attention the fact that nowadays quality is one of strategic concepts from the point of view of functioning of companies, especially production-oriented ones. The lack of quality often eliminates a product from the basket of potential further choices. That means that quality is a prerequisite in the contemporary, highly competitive and saturated market. In order to ensure quality, enterprises introduce various concepts and methods to support quality management. They include, among others, the kaizen philosophy, which allows to minimize unnecessary actions (losses). It is especially recommended to small firms as an inexpensive method assuring high quality of products because they are constantly improved, which, in turn, guarantees maintaining a high position among competitors. This article aims to introduce the concept of kaizen by describing how it works and considering whether it can be successful in Polish companies.

Wheeled Mobile Robot Tracking Control without Velocity Measurement

2013 ◽  
Vol 373-375 ◽  
pp. 231-237 ◽  
Author(s):  
Qiang Wang ◽  
Guang Tong ◽  
Xin Xing
Keyword(s):  
Mobile Robot ◽  
Mobile Robots ◽  
Velocity Measurement ◽  
Tracking Control ◽  
Wheeled Mobile Robot ◽  
Design Parameters ◽  
Wheeled Mobile Robots ◽  
Trajectory Tracking Control ◽  
Robot Tracking ◽  
Control Scheme

In this paper, a new robust trajectory tracking control scheme for wheeled mobile robots without velocity measurement is proposed. In the proposed controller, the velocity observer is used to estimate the velocity of wheeled mobile robot. The dynamics of wheeled mobile robot is considered to develop the controller. The proposed controller has the following features: i) The proposed controller has good robustness performance; ii) It is easy to improve tracking performance by setting only one design parameters.

Research and Development of High-Quality Mechanical Engineering Products

2013 ◽  
Vol 329 ◽  
pp. 503-506
Author(s):  
Zhe Wen ◽  
Qian Dong
Keyword(s):  
Research And Development ◽  
Market Research ◽  
Decisive Role ◽  
Structure Design ◽  
High Tech ◽  
High Quality ◽  
Core Components ◽  
Software And Hardware ◽  
Quality Of Products

Computer is high-tech equipment in the age of information, and has been widely applied in all industries by relying on its sharing, universality, intelligence and other characteristics. Seen from the structural composition, software and hardware are two core components of computer, and play a decisive role in the quality of computer and its system in the actual work. Software development is a process for building up software system or software of system according to the needs of users; in high-quality software research and development, multiple aspects such as market research, demand analysis, structure design and model debugging are involved, and the quality of products can be ensured only if each operation link is strictly controlled.

scholarly journals Influence of Microstepping Signal Shape on Shaft Movement Precision and Torque Variation of the Stepper Motor

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6107
Author(s):  
Bogdan Bednarski ◽  
Krzysztof Jackiewicz ◽  
Andrzej Gałecki
Keyword(s):  
Control Method ◽  
Current Control ◽  
Stepper Motor ◽  
Maximum Resolution ◽  
Control Scheme ◽  
Stepper Motors ◽  
Precise Movement ◽  
Series Of Experiments ◽  
Mathematical Analyses ◽  
Motor Operation

Stepper motors are widely used in many applications where discrete, precise movement is required. There is a variety of dedicated stepper motor controllers (sometimes referred to as “step sticks”) available on the market. Those controllers provide a number of different motor control schemes that vary by aspects like current control method, reference current shape or maximum resolution increase (microstepping). The two most widely acknowledged signal shapes are sine-cosine microstepping and quadrature microstepping. The choice of the control scheme impacts torque output, torque variation, positioning error and maximum power supply requirements. This paper presents a family of generalised microstepping signal shapes, ranging from sine-cosine microstepping to quadrature microstepping. Derivation of signal shapes as well as their mathematical analyses are provided. Those signals are then implemented on the control board. A series of experiments is performed on a test bench to analyse the influence of different signal shapes on the performance of the motor in both load and no load conditions. The comparison of the new generalized shapes influence on the motor operation to the commonly used sine-cosine and quadrature control is provided.

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