scholarly journals Position Measurement of a Small-Diameter Tunneling Machine by using Gyroscope. Theoretical Analysis of the Measuring Error Based on a Dynamic Model of a Tunneling Machine.

1996 ◽  
Vol 116 (8) ◽  
pp. 325-332 ◽  
Author(s):  
Kazuhiko Takahashi ◽  
Hiroshi Hosaka ◽  
Kunio Hoshiya ◽  
Kazuyoshi Kawabata
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Small Diameter ◽  
Measuring Error ◽  
Position Measurement ◽  
Tunneling Machine

Synergistic Approach to Enterprise Management

2015 ◽  
Vol 4 (3) ◽  
pp. 4-13
Author(s):  
Заковоротный ◽  
Vilor Zakovorotnyy ◽  
Угнич ◽  
Ekaterina Ugnich ◽  
Флек ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Dynamic Systems ◽  
Self Organization ◽  
Enterprise Management ◽  
Economic Systems ◽  
Complex Dynamic ◽  
Complex Dynamic Systems ◽  
Synergistic Approach ◽  
The Stability

The research reveals the peculiarities of synergistic model of enterprise management in market conditions. The possibilities of synergistic approach application towards the study of economic systems are shown in the article. On the basis of theoretical analysis of complex dynamic systems basic rules are identified which must be taken into consideration while examining the enterprise as a system in which the processes of self-organization exist. A generalized dynamic model of an enterprise in market environment is presented. It is carried out the analysis of the established condition of the enterprise as a system and the stability of its stationary state.

Dynamic Analysis and Experiment Research of the Two-Mass Feeder

2012 ◽  
Vol 488-489 ◽  
pp. 1823-1828
Author(s):  
Zhan Jiang Li ◽  
Fei Chen
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Dynamic Analysis ◽  
Dynamic Model ◽  
Structural Design ◽  
Scientific Basis ◽  
Experiment Research

In this paper, we make a theoretical analysis for the two-mass feeder. The dynamic model of the two-mass feeder is established. According to the analysis of vibration equations, the reasons that lead to forward and backward swing of the feeder are found. We collect a large number of experimental data in order to verify the correctness of the theoretical analysis, and give the corresponding improvements. The results provide a strong scientific basis for the examiner and the improvement of structural design, making the design become more rational.

Researches on Relationship between Dynamic Radius and Slip Ratio of Driving Wheel

2012 ◽  
Vol 159 ◽  
pp. 249-252
Author(s):  
Xi Qin Li
Keyword(s):  
Theoretical Analysis ◽  
Measuring Method ◽  
Measuring Error ◽  
Road Vehicles ◽  
Slip Ratio ◽  
Movement Characteristics ◽  
Driving Wheel ◽  
Experimental Researches

The dynamic radius of a driving wheel, especially for the off-road vehicles, has not been identified clear so far. This article reveals the relationships between the dynamic radius and the slip ratio of a driving wheel by theoretical analysis and experimental researches. The movement characteristics of a rigid driving wheel and an elastic pneumatic driving tire on soft roads are explained. There are many kinds of methods to measure the dynamic radius, and the magnitude of the dynamic radius is not the same according to the methods. A certain measuring method should be chosen for each kind of road conditions in order to reduce the measuring error.

Simplified Dynamic Model for Amount of Directional Correction of Small-Diameter Tunneling Robot

1992 ◽  
Vol 114 (3) ◽  
pp. 476-480 ◽  
Author(s):  
Shin-ichi Aoshima ◽  
Tetsuro Yabuta
Keyword(s):  
Automatic Control ◽  
Dynamic Model ◽  
Robot Control ◽  
Small Diameter ◽  
Control Technology ◽  
Control Laws ◽  
Telecommunication Cable ◽  
Fluid Jets ◽  
Direction Control ◽  
Dynamic Simulator

In the last decade, small-diameter tunneling technology has improved considerably. As a result, the use of this technology is expected to increase dramatically [1]. For example, one microtunneling system can produce microtunnels ranging in diameter from 45 to 150 mm by using mechanically assisted high-pressure, low-volume fluid jets [2]. However, no dynamic model or automatic direction control has yet been designed for this technology. This paper describes a simplified dynamic model for the amount of vertical directional correction for a small-diameter tunneling robot designed to install telecommunication cable conduit. This model can also be used for the horizontal direction. The direction control of a tunneling robot conventionally depends on both the experience and intuition of the operator, and there have been no studies with regard to its automation. Therefore, in order to establish an automatic control technology for a small-diameter tunneling robot, we construct a simplified dynamic model for the amount of directional correction of the robot taking its past trajectory into consideration. We can make a dynamic simulator for the tunneling robot using this dynamic model. With this simulator, we can establish control laws for robot control. So, this study can contribute to the development of automatic control technology for a tunneling robot.

Wireless Swimming Microrobot: Design, Analysis, and Experiments

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
Yongshun Zhang ◽  
Guangjun Liu
Keyword(s):  
Theoretical Analysis ◽  
Power Consumption ◽  
Low Power ◽  
Dynamic Model ◽  
Swimming Speed ◽  
Large Range ◽  
Experimental Results ◽  
Low Power Consumption ◽  
Driving Frequency ◽  
Resonance Frequencies

This paper presents a bidirectional wireless swimming microrobot that has been developed, analyzed, and experimentally tested. The robot is developed based on fin beating propulsion, using giant magnetostrictive films for head and tail fins. An innovative drive approach, using separate second order resonance frequencies of the head and tail fins to generate forward and backward thrusts, is proposed and implemented on a bidirectional swimming microrobot prototype. Dynamic model of the proposed microrobot has been derived based on theoretical analysis. Simulation and experimental results have demonstrated the feasibility of the proposed drive approach and design. The developed swimming microrobot features a low driving frequency, low power consumption, and a large range of swimming speed in both the forward and backward directions.

scholarly journals Study on Seismic Performance of Porcelain Pillar Electrical Equipment Based on Nonlinear Dynamic Theory

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Yaodong Xue ◽  
Yongfeng Cheng ◽  
Zhubing Zhu ◽  
Sheng Li ◽  
Zhenlin Liu ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Electrical Equipment ◽  
Nonlinear Parameter ◽  
Seismic Excitation ◽  
Test Results ◽  
Nonlinear Seismic Response ◽  
Calculation Results ◽  
The Difference ◽  
The Impact

In order to consider the influence of nonlinear characteristics of porcelain pillar electrical equipment on the dynamic response under seismic excitation, a theoretical analysis method of nonlinear dynamics was raised to define the nonlinear parameter of the flange connection and establish a dynamic model of porcelain pillar electrical equipment. The theoretical analysis and the test results have a good degree of fitting, which verifies the correctness of the dynamic model and reveals the nonlinear seismic response law of the porcelain pillar equipment. According to the results, both the nonlinear calculation results of the displacement at the top end of the porcelain pillar and the stress at the bottom end of the porcelain pillar are smaller than the results in the linear calculation. The difference between them increases gradually with the increase of seismic excitation. The differences in displacement and stress at a seismic excitation of 0.5 g are 14.58% and 23.25%, respectively. When the nonlinear parameter increases to a certain value, the impact of maximum stress on the bottom of the porcelain pillar is very small and the change is not obvious. The research provides a theoretical reference for the seismic design of pillar electrical equipment.

scholarly journals Theoretical Analysis of Thin Curved Rod Displacements V. P. Lugovoi1)

2021 ◽  
Vol 20 (5) ◽  
pp. 399-404
Author(s):  
V. P. Lugovoi
Keyword(s):  
Theoretical Analysis ◽  
External Force ◽  
Ultrasonic Method ◽  
Small Diameter ◽  
Elastic Displacement ◽  
Radius Of Curvature ◽  
Circular Arc ◽  
Oscillatory Systems ◽  
Curved Rods ◽  
Traditional Processing

The paper presents a comparative theoretical analysis of the movements of the curved rods of various curvature forms, which can be applied as tools for ultrasonic treatment of holes in fragile materials. It has been shown that the traditional processing of holes by an ultrasonic method is based on the use of straight rods, in which the amplitudes of displacements on the working – free end corresponds to the value of displacements at the point of its attachment to the ultrasonic oscillation concentrator. Supplementing the configuration of a straight rod with a curvilinear shape in the form of a circular arc or a spiral twisted by one turn will allow obtaining additional displacements caused by the elastic properties of a section with a curved shape. The paper considers several calculated schemes of a curvilinear rod bounded by angles j equal to p/2, p and 2p, fferent direction of the external force action. The obtained results have shown that an increase in the circular arc angle leads to a corresponding increase in the elastic displacement index of the rod free end. In this case, the total displacements of the rod free end will be made from displacements caused by vibrations of the acoustic system and the displacements of a curved thin rod from an external force. Calculations have established that the magnitude of the elastic displacements of curved rods is influenced by the shape and magnitude of the angle, the direction of the external force, the radius of curvature, the rigidity of the cross section. The considered schemes of thin rods with curvilinear sections can find practical application in ultrasonic oscillatory systems for processing small-diameter holes in fragile materials. This increases the intensity of tool oscillations and improves the process performance.

Dynamic Properties Analysis of Electromagnetic Gear Driving System

2010 ◽  
Vol 34-35 ◽  
pp. 422-428
Author(s):  
Hai Hong Chen ◽  
Jun Chen
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Static Analysis ◽  
Dynamic Characteristics ◽  
Torsional Vibration ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Mechanical Vibration ◽  
Performance Parameter ◽  
Driving System

Electromagnetic gear realize non-touching driving technology, which is non-friction and non- lubrication. Based on the FEM static analysis, creating torsional vibration dynamic model for the electromagnetic gear system with the theory and method of mechanical vibration to makes research on the dynamic performance parameter. The system makes motion stimulation by utilizing the Simulink module of MATLAB. Then, a conclusion is made through the theoretical analysis. The analysis provides some reference for the futher study of the dynamic characteristics of the magnetic gear driving system.

The Analysis of Transient Stability for Four Wheel Steering Automobile with Proportional Control

2011 ◽  
Vol 141 ◽  
pp. 534-538 ◽  
Author(s):  
Zuo Jun Song
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Transient Response ◽  
Dynamic Equation ◽  
Theoretical Basis ◽  
Transient Stability ◽  
Driver Model ◽  
Stability Studies ◽  
Proportional Control ◽  
Simulation Results

A 4WS automobile dynamic model with two degree-freedom was presented, and it’s dynamic equation and transient response was obtained by theoretical analysis. The simulation on its handling stability was executed with the driver model, and the simulation results showed that a 4WS automobile had a better performance than a 2WS automobile. The calculation and simulation results provided more accurate theoretical basis in automobile stability studies.

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