scholarly journals Force Transmission Characteristics for Thrust System in Rectangular Shield Machine

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 177804-177812
Author(s):  
Kongshu Deng ◽  
Yicheng Ding ◽  
Lu Zeng ◽  
Zhurong Yin
Keyword(s):  
Force Transmission ◽  
Transmission Characteristics ◽  
Thrust System ◽  
Shield Machine

A load-balancing-oriented symmetrical uneven layout design for thrust system in tunneling machines under composite ground

2018 ◽  
Vol 233 (8) ◽  
pp. 2847-2854 ◽  
Author(s):  
Kongshu Deng ◽  
Zhurong Yin ◽  
Bangliang Meng ◽  
Cong Xiang
Keyword(s):  
Load Balancing ◽  
System Model ◽  
Force Transmission ◽  
Driving System ◽  
Thrust System ◽  
Composite Ground ◽  
Mixed Ground ◽  
Set Up ◽  
Shield Machine ◽  
Safety And Environment

Mechanized tunneling is characterized by high automation, efficiency, safety, and environment-friendly during tunnel construction progress. Studies to improve the force transmission performance of the thrust system playing an important role among all sub-systems in shield machine have been conducted recently. In this paper, a new nonequidistant arrangement with load-balancing-oriented ability has been proposed under complex ground. Firstly, the required mechanical functions are derived from the force transmission ellipse model. Secondly, the symmetrical uneven thrust system model has been set up to solve the mechanical functions. Then, all characteristics for the symmetrical shape driving system model have been investigated in detail. Finally, applying the solving model to the thrust system of a shield machine with a diameter 6.28 m, which has been used to construct some tunnels, the comparison of force transmission between the designed uneven thrust system and the even system manifests that the performance for nonuniform driving system is more uniform than the latter. The results also proved that nonequidistant thrust system with the better transmissibility in force can be preferred under some mixed ground.

scholarly journals Kinematic Synthesis of Tendon-Driven Manipulators with Isotropic Transmission Characteristics

1993 ◽  
Vol 115 (4) ◽  
pp. 884-891 ◽  
Author(s):  
Yeong-Jeong Ou ◽  
Lung-Wen Tsai
Keyword(s):  
Jacobian Matrix ◽  
Null Vector ◽  
Force Distribution ◽  
Force Transmission ◽  
Transmission Characteristics ◽  
Kinematic Synthesis ◽  
End Effector ◽  
Structure Matrix ◽  
Applied Forces ◽  
Matrix Design

This paper presents a methodology for kinematic synthesis of tendon-driven manipulators with isotropic transmission characteristics. The force transmission characteristics, from the end-effector space to the actuator space, has been investigated. It is shown that tendon forces required to act against externally applied forces are functions of the structure matrix, its null vector, and the manipulator Jacobian matrix. Design equations for synthesizing a manipulator to possess isotropic transmission characteristics are derived. It is shown that manipulators which possess isotropic transmission characteristics have much better force distribution among their tendons.

Analysis of Force Transmission Characteristics of Modular Deformable Tire

2020 ◽  
Vol 21 (5) ◽  
pp. 1121-1127 ◽  
Author(s):  
Kongshu Deng ◽  
Lu Zeng ◽  
Yicheng Ding ◽  
Zhurong Yin
Keyword(s):  
Force Transmission ◽  
Transmission Characteristics

scholarly journals Analysis of the Single Toggle Jaw Crusher Force Transmission Characteristics

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Moses Frank Oduori ◽  
David Masinde Munyasi ◽  
Stephen Mwenje Mutuli
Keyword(s):  
Mean Value ◽  
Force Transmission ◽  
Transmission Characteristics ◽  
Dead Weight ◽  
Mechanical Advantage ◽  
Jaw Crusher ◽  
Output Torque ◽  
The Mean ◽  
Balance Of Forces ◽  
Input Torque

This paper sets out to perform a static force analysis of the single toggle jaw crusher mechanism and to obtain the force transmission characteristics of the mechanism. In order to obtain force transmission metrics that are characteristic of the structure of the mechanism, such influences as friction, dead weight, and inertia are considered to be extraneous and neglected. Equations are obtained by considering the balance of forces at the moving joints and appropriately relating these to the input torque and the output torque. A mechanical advantage, the corresponding transmitted torque, and the variations thereof, during the cycle of motion of the mechanism, are obtained. The mechanical advantage that characterizes the mechanism is calculated as the mean value over the active crushing stroke of the mechanism. The force transmission characteristics can be used as criteria for the comparison of different jaw crusher mechanism designs in order to select the most suitable design for a given application. The equations obtained can also be used in estimating the forces sustained by the components of the mechanism.

Stable Adaptive Control Strategy in Thrust System of Shield Machine

2013 ◽  
Vol 273 ◽  
pp. 699-703
Author(s):  
Rui Hu ◽  
Guo Fang Gong ◽  
Lin Tao Wang ◽  
Xu Yang
Keyword(s):  
Adaptive Control ◽  
Control Strategy ◽  
Single Neuron ◽  
Loop Control ◽  
Pressure Feedback ◽  
Thrust System ◽  
Adaptive Control Strategy ◽  
Single Neuron Pid ◽  
Adaptive Ability ◽  
Shield Machine

In this paper, a stable adaptive control strategy was proposed to improve the adaptive ability of thrust system of shield machine. The control strategy is composed of internal pressure feedback loop control and external advanced single neuron PID loop control. Its effectiveness was finally demonstrated by the result of AMESim-Matlab/Simulink Co-simulation.

Force Feedback Glove for Manipulation of Virtual Objects

1993 ◽  
Vol 5 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Haruhisa Kawasaki ◽  
◽  
Takahiro Hayashi
Keyword(s):  
Feedback Control ◽  
Force Feedback ◽  
Joint Angle ◽  
Force Sensor ◽  
Servo Motor ◽  
Force Transmission ◽  
Transmission Characteristics ◽  
Angle Sensor ◽  
Virtual Objects ◽  
The Difference

This paper presents a new force feedback glove for manipulation of virtual objects. The glove is comprised of wire, link, servo motor, force sensor, and joint angle sensor of fingers. These devices are mounted to the back of glove. The object grasping sense is generated by the force feedback control of the servo motor. We show the force transmission characteristics of the glove and the experimental results of recognition of the difference in rigidity of object.

scholarly journals Dimensional design of thrust system with an adjustable layout mechanism in shield machine

2020 ◽  
Vol 14 (1) ◽  
pp. JAMDSM0011-JAMDSM0011
Author(s):  
Kongshu DENG ◽  
Yicheng DING ◽  
Lu ZENG ◽  
Zhurong YIN
Keyword(s):  
Thrust System ◽  
Shield Machine

scholarly journals Adaptability to stratum characteristics for layout of thrust system in tunneling machines based on variation coefficient

2016 ◽  
Vol 8 (12) ◽  
pp. 168781401668243 ◽  
Author(s):  
Kongshu Deng ◽  
Bangliang Meng ◽  
Cong Xiang
Keyword(s):  
Numerical Analysis ◽  
Mechanical Model ◽  
Theoretical Foundation ◽  
Variation Coefficient ◽  
Driving System ◽  
Hydraulic Cylinders ◽  
Thrust System ◽  
Adaptive Ability ◽  
Shield Machine ◽  
The Relationship

This study aims to investigate the characteristics of adaptability to stratum for thrust system in tunneling machines in composite stratum. Initially, variation coefficient thrust model has been constructed on the basis of a mechanical model. By analyzing the variation coefficient thrust model, the variation coefficient surface can be discovered. Second, by analyzing the relationship between spaces of variation coefficient surface and adaptability to compound ground, the variation coefficient surface family which indicates the adaptive ability to stratum conditions for pushing system has been discovered. Eventually, applying variation coefficient adaptability model to the driving system of shield machine in engineering applications, adaptability for two layouts with the same number of hydraulic cylinders in thrust system has been discussed in detail through comparison of numerical analysis and simulation in ADAMS. The results could provide theoretical foundation and support for the design of an adaptability thrust system under composite stratum.

scholarly journals Layout optimization for non-equidistant thrust system of tunneling machine based on geometric progression under mixed ground

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041987498 ◽  
Author(s):  
Kongshu Deng ◽  
Lu Zeng ◽  
Yicheng Ding ◽  
Guoqing Wang
Keyword(s):  
Design Method ◽  
Geological Structure ◽  
Composite Foundation ◽  
Geometric Progression ◽  
Force Transmission ◽  
Transmission Performance ◽  
Driving System ◽  
Geological Conditions ◽  
Thrust System ◽  
Tunneling Machine

For the difference of rock and soil strength on the tunneling face, curved tunneling, and the top-heavy structure of the main machine forming the complex geological structure, the adoption of uniform thrust system arising from large unbalanced load easily causes cracks and dislocations in the rear segments. Therefore, non-equidistant driving system would be adopted in this composite foundation. This article presents a geometric progression method for layout design of non-uniform thrust system. Based on the force transmission laws of the thrust system, the geometric progression increasing difference model of arranging non-uniform driving system has been proposed. Then, the characteristics of the design method have been discussed in detail. Finally, the model has been applied to a diameter of 9.49 m of tunneling machine with a thrust system of 14 pairs of jacks which has been successfully used in curved tunnel construction in Germany. By adopting the coefficient of variation representing the force transmission performance derived from all thrusts for jacks, it indicates that the performance of the optimized thrust system is better than the original one. The results would provide a theoretical basis for the design of a non-equidistant thrust system with better force transmission performance under working geological conditions.

Theory of Isotropic Transmission for Tendon-Driven Manipulators

1994 ◽  
Author(s):  
Yeong-Jeong Ou ◽  
Lung-Wen Tsai
Keyword(s):  
General Theory ◽  
Power Transmission ◽  
Degree Of Freedom ◽  
Mechanical Power ◽  
Force Distribution ◽  
Static Force ◽  
Force Transmission ◽  
Transmission Characteristics ◽  
End Effector ◽  
Transmission Structure

Abstract This paper deals with the synthesis of the mechanical power transmission structure in tendon-driven manipulators. Based on the analysis of static force transmission from the actuator space to the end-effector space, a general theory is developed for the synthesis of tendon-driven manipulators with isotropic transmission characteristics. It is shown that an n-dof (degree of freedom) manipulator can possess these characteristics if it is made up of n+1 or 2n tendons and if its link lengths and pulley sizes are designed according to two equations of constraint. Two examples are used to demonstrate the theory. It is also shown that manipulators with an isotropic transmission structure do have more uniform force distribution among their tendons.

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