Depth Control Method of AFM-Based Nanomachining with Diamond Tip in Deflection Mode

2007 ◽  
Vol 10-12 ◽  
pp. 578-582 ◽  
Author(s):  
Zhen Jiang Hu ◽  
Yong Da Yan ◽  
Tao Sun ◽  
Shen Dong ◽  
Z.Z. Zhao
Keyword(s):  
Theoretical Analysis ◽  
Penetration Depth ◽  
Theoretical Basis ◽  
Control Algorithm ◽  
Control Method ◽  
Normal Load ◽  
Penetration Process ◽  
Depth Control ◽  
Machining System

The equations correlated the normal load and the tip penetration depth were derived through the theoretical analysis of the penetration process of the diamond tip. Verified by experiments, the equations can reflect the penetration process of the scratching machining system and provide theoretical basis for the optimization of depth control algorithm. The control of scratching depth realized in AFM deflection mode can effectively restrain the system drift during scratching process.

Penetrating Process Analysis of AFM Diamond Tip

2007 ◽  
Author(s):  
Z. J. Hu ◽  
Y. D. Yan ◽  
Y. H. Zhang ◽  
T. Sun ◽  
S. Dong
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Penetration Depth ◽  
Theoretical Basis ◽  
Process Analysis ◽  
Three Dimensional ◽  
Machining Process ◽  
Precision Stage ◽  
Atomic Force ◽  
Depth Control

A mechanical micro-scratching system based on Atomic Force Microscope (AFM) and three-dimensional high precision stage was built up. In the machining process with diamond tip, the process of depth controlling was determined by the relation between the loading movement of the stage and the tip penetration depth. By theoretical analysis of loading process with diamond tip, a mathematical model correlated loading movement and the penetration depth was founded, and the loading efficiency formula of elastic tip was also acquired. Verified by experiments, such equations reflected the indenting process of the system and provided theoretical basis on optimizing the penetration depth control arithmetic.

A Distributed Index Tree and its Concurrency Control Algorithm

2014 ◽  
Vol 1044-1045 ◽  
pp. 982-985
Author(s):  
Wei Jie Gu ◽  
Yun Liang Wang
Keyword(s):  
Theoretical Analysis ◽  
Concurrency Control ◽  
Control Algorithm ◽  
Control Method ◽  
Experimental Results ◽  
Massive Data ◽  
Time Control ◽  
Distributed Index ◽  
Tree Index ◽  
Index Tree

This paper presents a new distributed index tree named RDB+-Tree and a concurrency control algorithm named VTC-RDB+. In RDB+-Tree, the leaf node is organized for a hash list. The principle of VTC-RDB+ algorithm can be established by utilizing multiple elements which are in favor of concurrency control and by combining with version and time control method. Theoretical analysis and experimental results show that the RDB+-Tree index tree and VTC-RDB+ algorithm can effectively enhance the query and updating performance of the massive data in the distributed circumstance.

Research on the Control Method of Penetration Depth Based on the Acceleration Data

2012 ◽  
Vol 151 ◽  
pp. 514-517
Author(s):  
Hong Song Cao ◽  
Bao Cheng Ma ◽  
Ya Zhang ◽  
Hui Suo Zhang ◽  
Yun Bo Shi
Keyword(s):  
Penetration Depth ◽  
Control Algorithm ◽  
Control Method ◽  
Acceleration Data ◽  
The Right ◽  
Signal Processor

In order to gain the maximum destroy when the concrete facilities are penetrated by projectile, the best detonation position must be controlled. So a signal processor system was designed to record the penetration acceleration. The acceleration character and the control algorithm of penetration depth were studied by simulation. The displacement integrated by acceleration was verified to be effective, which could control the detonation of projectile in the right position.

Research on Driving Mechanism and Movement Principle of Underwater Glider

2012 ◽  
Vol 433-440 ◽  
pp. 6825-6831
Author(s):  
Dong Hai Su ◽  
Yu Zhang ◽  
Ying Shi ◽  
Kuo Yang
Keyword(s):  
Theoretical Analysis ◽  
Theoretical Basis ◽  
Control Method ◽  
Movement Control ◽  
Organization Structure ◽  
Driving Mechanism ◽  
Underwater Glider ◽  
Underwater Gliders ◽  
Working Principle ◽  
Steady Rotation

In this paper, firstly, the organization structure and working principle of gliders are introduced. Secondly, the buoyancy driven principle of gliders as well as the composition of buoyancy drive system is given. Thirdly, the stationary movement state is analyzed and the law of motion about the steady gliding as well as steady spiral rotation in vertical space are given and the principles, control method of vertical steady glide as well as spiral steady rotation in space are also given, which provides an important theoretical basis with the movement control of underwater gliders. Finally, the vehicle’s underwater experiment was completed. The results of experiment proved that the theoretical analysis is correct and also verified that the design of vehicle is rational, which could meet the requirement of control.

Adaptive depth control algorithm for sound tracing

2018 ◽  
Vol 24 (5) ◽  
pp. 21-30
Author(s):  
Eun Jae Kim ◽  
Woonam Chung ◽  
Woochan Park ◽  
Yun Juwon ◽  
Youngsik Kim
Keyword(s):  
Control Algorithm ◽  
Depth Control

Exploration on Shape of Profiles Determined by Chord Angle Control Method

2011 ◽  
Vol 314-316 ◽  
pp. 837-841
Author(s):  
Ling Ling ◽  
Yuan Sheng Zeng
Keyword(s):  
Theoretical Basis ◽  
Control Method ◽  
Angle Measurement ◽  
Mapping Method ◽  
Control Methods ◽  
Forming Process ◽  
Spline Curve ◽  
Curve Line ◽  
Line Measure

Through compassion of relative merits of the existing two control methods of straighten anti-curve line and chord line measure for cold-formed profiles, a three-pivot chord angle control method of non-endpoint measurement was proposed in this paper, and its feasibility was proved by using mathematical deduction. Using mapping method, the forming of profiles can be controlled by the only one set of orderly array chord angles and chord lines obtained by a spline curve of profiles, and meanwhile, the length of automation feedstock in forming process of profiles was explored. The present research achievements can provide a good theoretical basis for the further application on controlling profile forming with the chord angle measurement.

Robust Control Method Based on Machine Learning for Boiler Combustion System

2014 ◽  
Vol 685 ◽  
pp. 368-372 ◽  
Author(s):  
Hao Zhang ◽  
Ya Jie Zhang ◽  
Yan Gu Zhang
Keyword(s):  
Robust Control ◽  
Intelligent Control ◽  
Pid Control ◽  
Control Algorithm ◽  
Control Method ◽  
Support Vector ◽  
Control Performance ◽  
Fuzzy Pid Control ◽  
On Line ◽  
Control Output

In this study, we presented a boiler combustion robust control method under load changes based on the least squares support vector machine, PID parameters are on-line adjusted and identified by LSSVM, optimum control output is obtained. The simulation result shows control performance of the intelligent control algorithm is superior to traditional control algorithm and fuzzy PID control algorithm, the study provides a new control method for strong non-linear boiler combustion control system.

A Novel Vertical Lift Machine and its Precise Pose Control

2014 ◽  
Vol 989-994 ◽  
pp. 3105-3109
Author(s):  
Xiao Bo Liu ◽  
Xiao Feng Wei ◽  
Xiao Dong Yuan ◽  
Wei Ni
Keyword(s):  
Control System ◽  
Theoretical Analysis ◽  
Control Method ◽  
High Accuracy ◽  
Inverse Kinematic ◽  
Design Model ◽  
Pose Control ◽  
Vertical Lift ◽  
Position And Orientation ◽  
Control Principle

This paper deals with the design and theoretical analysis on a novel vertical lift machine which can vertically lift above 700 kg load up to 3.2 meters above the floor and located the load with high accuracy of position and orientation. Firstly the design model based on the installment demands of line-replaceable units (LRUs) is constructed. Then theoretical analysis including the number of degree of freedom of the lift machine, the inverse kinematic, the control principle, the lift platform pose error and the precise pose control method are conducted in the article. The validity of the design model and the effectiveness of the precise pose control system are confirmed by experiments using a prototype lift machine.

Urban Oversaturated Traffic Network Control Based on Preference Multi-Objective Compatible Optimization Control

2011 ◽  
Vol 317-319 ◽  
pp. 1373-1384 ◽  
Author(s):  
Juan Chen ◽  
Chang Liang Yuan
Keyword(s):  
Control Problem ◽  
Control Algorithm ◽  
Control Method ◽  
Network Control ◽  
Feasible Region ◽  
Traffic Network ◽  
Total Delay ◽  
Multi Objective ◽  
Optimization Control ◽  
Objective Control

To solve the traffic congestion control problem on oversaturated network, the total delay is classified into two parts: the feeding delay and the non-feeding delay, and the control problem is formulated as a conflicted multi-objective control problem. The simultaneous control of multiple objectives is different from single objective control in that there is no unique solution to multi-objective control problems(MOPs). Multi-objective control usually involves many conflicting and incompatible objectives, therefore, a set of optimal trade-off solutions known as the Pareto-optimal solutions is required. Based on this background, a modified compatible control algorithm(MOCC) hunting for suboptimal and feasible region as the control aim rather than precise optimal point is proposed in this paper to solve the conflicted oversaturated traffic network control problem. Since it is impossible to avoid the inaccurate system model and input disturbance, the controller of the proposed multi-objective compatible control strategy is designed based on feedback control structure. Besides, considering the difference between control problem and optimization problem, user's preference are incorporated into multi-objective compatible control algorithm to guide the search direction. The proposed preference based compatible optimization control algorithm(PMOCC) is used to solve the oversaturated traffic network control problem in a core area of eleven junctions under the simulation environment. It is proved that the proposed compatible optimization control algorithm can handle the oversaturated traffic network control problem effectively than the fixed time control method.

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