Moving-Average-Based CNC Simulation System with NC Instruction Interpretations

2012 ◽  
Vol 184-185 ◽  
pp. 1584-1587
Author(s):  
Fang Song ◽  
Shuang Hui Hao ◽  
Ming Hui Hao
Keyword(s):  
Control Algorithm ◽  
Moving Average ◽  
Simulation System ◽  
Process Time ◽  
Feed Speed ◽  
The Real ◽  
Executive Process ◽  
Real Process ◽  
Nc Program ◽  
Cnc Simulation

The paper presents a novel acceleration/deceleration (acc/dec) control algorithm based on moving-average. The proposed algorithm makes use of the moving-average method to dispose the velocities of all the discrete points obtained by linear acc/dec control algorithm. The acceleration curve is continuous and the speed curve is smooth obtained by this method. Furthermore, the proposed algorithm has easier calculation to achieve. Therefore, CNC simulation system with NC instruction interpretation is established based on this proposed algorithm. The system not only simulates the executive process of NC program files, but also realizes the simulation of speed and acceleration curve, process time and distance with the unit of controlling period. At the same time, the simulation system considers the acc/dec control of feed speed therefore the simulation time equals the real process time. Those will be the value of the instruction to the process of the real machining.

?Estimation of the Real-time Respiratory Simulation System in CyberKnife Image-guided Radiosurgery

2010 ◽  
Vol 56 (1) ◽  
pp. 164-170
Author(s):  
Suk Lee ◽  
Chul Kee Min ◽  
Weon Kuu Chung ◽  
Jang Bo Shim ◽  
HyunDo Huh ◽  
...  
Keyword(s):  
Real Time ◽  
Simulation System ◽  
The Real ◽  
Image Guided

The Application of Three-Dimensional Terrain Modeling Based on GeoTIFF Supported by Creator

2014 ◽  
Vol 687-691 ◽  
pp. 4101-4104
Author(s):  
Xi Zhe Peng
Keyword(s):  
Three Dimensional ◽  
Simulation System ◽  
Visual Simulation ◽  
Large Area ◽  
Terrain Modeling ◽  
Key Technology ◽  
The Real ◽  
Modeling Technology ◽  
Terrain Models

Large area real terrain modeling is the key technology in visual simulation system. This thesis discusses the terrain modeling technology based on the GeoTIFF data, which transform the GeoTIFF data to DEM using the Global Mapper. And then, the three dimensional terrain models are established through Creator environment, the real terrain modeling is implemented quickly.

Optimal Model Selection Using MP Criterion for Uncertain Multivariable 2×2 Systems Based on IMC

2008 ◽  
Author(s):  
Inbal Shani ◽  
Neima Brauner ◽  
Coleman B. Brosilow
Keyword(s):  
Mathematical Model ◽  
Control Systems ◽  
Controller Design ◽  
Optimal Model ◽  
Time Constants ◽  
The Real ◽  
Real Process ◽  
Decoupled Control ◽  
The Mathematical Model ◽  
Performance Variations

IMC controller design for a process is based on choosing a mathematical model that describes the real process. The mathematical model describing such process is often not unique because the real variables of the process can vary within an interval. In such cases the performance of the control system varies, possibly substantially, as process parameters change. To limit such performance variations, we have developed an algorithm for choosing the model gains and the filter time constants of the IMC controller, to minimize the amount of interaction between outputs due to set point changes and disturbances for multivariable decoupled control systems. Some examples illustrate the algorithm.

The Reproduction of money material in Marx’s Capital II (by way of a critique of Sandemose’s ‘gold digging’)

2020 ◽  
pp. 030981682093229
Author(s):  
Tomás Friedenthal
Keyword(s):  
Social Capital ◽  
Central Problem ◽  
The Real ◽  
Crucial Feature ◽  
Real Process ◽  
Definite Solution ◽  
Gold Digging

The question of the reproduction of money material is a crucial feature in the investigation of the cycle of the total social capital that Marx tackled in the context of simple reproduction analysis in Part Three of Capital II. However, his inquiry was left unfinished, so the problem remained ultimately unsolved. This unsettled character was first identified by Luxemburg and later by Grossman. Sandemose attempted to reconstruct the ‘missing fragment’ of Marx’s investigation, where the analysis of the reproduction of the constant capital of gold producers should have been accomplished, alleging that its absence contributed to keep out of sight a central problem addressed there by Marx: that is, ‘the problem of the excess money necessary for the passage from simple reproduction to accumulation’. Sandemose claims also to have accurately reconstructed the passage, attaining a definite solution to the problem that Marx left unanswered. This article shows that both allegations are completely unwarranted. First, it demonstrates that under simple reproduction assumptions there is actually no (net) hoard formation (‘excess money’), in spite of Sandemose’s claim. This also entails a critique of Marx’s conclusions. As a corollary, Sandemose’s thesis that the central problem Marx addressed there was that of the ‘excess money’ needed for accumulation proves to be untenable. Second, the article also demonstrates that Sandemose’s reconstruction of Marx’s ‘missing fragment’ is fundamentally flawed, offering at the same time a consistent alternative. By this means, the investigation initiated by Marx is finally completed. As a result, and beyond its outward polemic character, this article actually renders an ideal (i.e. in thought) simple reproduction of the real process of reproduction of the total social capital, where replacement of the money material is fully taken into account.

scholarly journals Comparative Study on Surfactants Mixtures in Aqueous Solution at Atmospheric Pressure and 10 bar Reservoir Atmosphere

2018 ◽  
Author(s):  
Andrea Elekes ◽  
Roland Nagy ◽  
László Bartha ◽  
Árpád Vágó
Keyword(s):  
Crude Oil ◽  
Petroleum Industry ◽  
Test Methods ◽  
Petroleum Exploration ◽  
Process Conditions ◽  
Water Type ◽  
The Real ◽  
Real Process ◽  
Oil In Water ◽  
Wide Range

This paper considers anionic and nonionic surfactants, as candidates for crude oil production by enhancement applications. In this study some colloidal properties of surfactants were tested by conventional and new test methods. The oil in water type emulsions have great importance in the petroleum industry. The stability of crude oil in water emulsions are investigated in a wide range of physical and chemical circumstances. Investigations at 10 bar are needed to get knowledges on the real conditions of the given petroleum exploration processes. A special glass cell was used for the tests of the mixtures various crude oil-water emulsions under hydrocarbon gas atmosphere and for the oil disclapement efficiency. Based on the experimental results it was found that emulsifying capacity was changed significantly by the real process conditions. The decrease of the density of hydrocarbon phase was contributed to the overall reduction in the efficiency of emulsifiers also occurred. Based on the experimented data it is supported to pay more attention to apply the real test conditions or approximate the real values.

Research of Paddle Wave-Maker Control System Based on Jonswap Spectrum

2014 ◽  
Vol 1006-1007 ◽  
pp. 679-684
Author(s):  
Xue Fei Huang ◽  
Mao Pang
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Energy Saving ◽  
Real Time ◽  
Personal Computer ◽  
Control Algorithm ◽  
Change Rate ◽  
The Real ◽  
Wave Maker ◽  
Jonswap Spectrum

According to large energy consumption, overload and re-reflection problemr, the control algorithm of wave-maker has been improved based on Jonswap spectrum. The control algorithm is comprised of the offline calculation of the control waveform and the real-time governing of the wave paddle. Offline algorithm is implemented on a personal computer, whereas paddle control is realized on a programmable automation controller. The experiments results show that the speed is continuous and stable, change rate of load has been optimized obviously and achieves the purpose of energy saving.

Customized End Milling Operation of Dental Artificial Crown Without CAM Operation

2018 ◽  
Vol 12 (6) ◽  
pp. 947-954 ◽  
Author(s):  
Isamu Nishida ◽  
◽  
Ryo Tsuyama ◽  
Ryuta Sato ◽  
Keiichi Shirase
Keyword(s):  
Cutting Force ◽  
Real Time ◽  
End Milling ◽  
Feed Speed ◽  
High Productivity ◽  
Nc Program ◽  
Milling Operation ◽  
Machine Control ◽  
Copy Milling ◽  
Tool Motion

A new methodology to generate instruction commands for real-time machine control instead of preparing NC programs is developed under the CAM-CNC integration concept. A machine tool based on this methodology can eliminate NC program preparation, achieve cutting process control, reduce production lead time, and realize an autonomous distributed factory. The special feature of this methodology is the generation of instruction commands in real time for the prompt machine control instead of NC programs. Digital Copy Milling (DCM), which digitalizes copy milling, is realized by referring only to the CAD model of the product. Another special feature of this methodology is the control of the tool motion according to the information predicted by a cutting force simulator. This feature achieves both the improvement in the machining efficiency and the avoidance of machining trouble. In this study, the customized end milling operation of a dental artificial crown is realized as an application using the new methodology mentioned above. In this application, the CAM operation can be eliminated for the NC program generation, and tool breakage can be avoided based on the tool feed speed control from the predicted cutting force. The result shows that the new methodology has good potential to achieve customized manufacturing, and can realize both high productivity and reliable machining operation.

The Research into the Visual and Simulated System of the Orbiting Satellite

2013 ◽  
Vol 753-755 ◽  
pp. 1324-1327
Author(s):  
Jia Qiang Dong
Keyword(s):  
Real Time ◽  
Time Management ◽  
Simulation System ◽  
Earth Model ◽  
Virtual Training ◽  
The Real ◽  
Whole Process ◽  
Network Training ◽  
The Earth ◽  
Simulated System

The visual and simulated system of the orbiting satellite based on the OpenGL technology is designed and realized in this paper, in which a visualization platform of the satellite in-orbit running is constructed. The simulation system has constructed the satellite model and the earth model by making use of 3DS MAX technology, and achieved the visualization of satellite in-orbit-running, the visualization of the communication route and of the overlay effect. At the same time, which has realized the access to the database of the orbiting satellite by means of ADO technology .The practices have proven that the system can simulate the whole process of satellite in-orbit-running in real-time, and provides the assistant support platform of the real-time management and decision. Apart from this, the system provides the network training of the space forces with virtual training platform. It is of great significance to construct the virtual battlefield simulation system.

Simulation and Experiment Study of Hybrid Actuators Five-Bar Mechanism Kinematics Parameter

2010 ◽  
Vol 148-149 ◽  
pp. 168-171
Author(s):  
Ning Shan
Keyword(s):  
Pid Control ◽  
Control Algorithm ◽  
Closed Loop ◽  
Control Method ◽  
Experimental System ◽  
Experiment Study ◽  
The Real ◽  
Input Parameters ◽  
Simulation And Experiment ◽  
Kinematics Parameters

The kinematics model of planar closed-loop five-bar mechanism is established in this paper. The influence of mechanism’s input parameters on the output kinematics parameters is investigated by simulation. The five-bar mechanism is designed. The experimental system of hybrid actuators five-bar mechanism is established based PID control method. The experiment investigates the influence of mechanism’s input parameters on the output kinematics parameters. The results show that the mechanism’s output kinematics parameters depend on input parameters. The original angle of input bar is bigger, curves of kinematics parameters of output bar change more acutely. Applying PID control algorithm to control the hybrid actuators linkage, the real kinematics parameters of linkage are almost consistent with theory values and the error is less.

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