scholarly journals An allowance allocation method based on dynamic approximation via online inspection data for deformation control of structural parts

2020 ◽  
Author(s):  
Xiaozhong HAO ◽  
Yingguang LI ◽  
Chong HUANG ◽  
Mengqiu LI ◽  
Changqing LIU ◽  
...  
Keyword(s):  
Deformation Control ◽  
Allocation Method ◽  
Allowance Allocation ◽  
Structural Parts ◽  
Inspection Data ◽  
Online Inspection ◽  
Dynamic Approximation

scholarly journals Research and Application of High Precision Machining Technology for Super-Large Integral Frame Parts of Aluminum Alloy

2020 ◽  
Author(s):  
Hong Ji ◽  
Yujie Wang ◽  
Yu Peng ◽  
Lixin Zhao ◽  
Song Huang
Keyword(s):  
Aluminum Alloy ◽  
Error Control ◽  
Large Scale ◽  
Dimensional Accuracy ◽  
Machining Process ◽  
Processing Efficiency ◽  
Deformation Control ◽  
Large Size ◽  
Structural Parts ◽  
Large Aircraft

Compared with ordinary large-scale structural parts, super-large aircraft aluminum alloy integral frame parts have the characteristics of large size, high ribs and thin-walled, which lead to the difficulty of deformation control and dimensional accuracy assurance in the machining process, and the problems of spring knife and broach are easy to occur. In this paper, the research on super-large aluminum alloy integral frame parts is carried out, and a set of methods with part deformation control and coordinate drift error control are proposed, and the processing programming strategy is further optimized. This method has been successfully applied to a super-large aircraft aluminum alloy integral frame part, which greatly reduces the deformation of parts, improves the processing stability, and improves the processing efficiency by about 30%.

Engine VideoScope software: a common user interface for online inspection, data management, and image processing

1998 ◽  
Author(s):  
Dieter J. Schmidradler ◽  
Walter van Dyck ◽  
Johann Oberleitner ◽  
Gerfried Zeichen
Keyword(s):  
Image Processing ◽  
User Interface ◽  
Data Management ◽  
Inspection Data ◽  
Online Inspection ◽  
Common User

THE EFFECTIVE BENCHMARK SELECTION MODEL AND SIMULATION IN THE POWER SECTOR OF CHINA’S ETS

2020 ◽  
Vol 11 (03) ◽  
pp. 2041006
Author(s):  
SHAOZHOU QI ◽  
ANQI HE ◽  
JIHONG ZHANG
Keyword(s):  
Power Generation ◽  
Supply And Demand ◽  
Emission Trading ◽  
Selection Model ◽  
Trading Market ◽  
Allocation Method ◽  
Model And Simulation ◽  
Allowance Allocation ◽  
Trading Scheme ◽  
Carbon Emission Trading

In 2019, the National Carbon Emission Trading Scheme (ETS) of China’s power generation industry was officially launched, and the free allocation and benchmark are the primary ways for allowance allocation in the first phase of the national ETS. The carbon allowance allocation method is the basis for the effective operation of the ETS. In order to evaluate China’s carbon allowance allocation method published by policy, we constructed a selection model of the effective benchmark and combined with three different scenarios such as no generation-right trading market, incomplete generation-right trading market and complete generation-right trading market to simulate the operation of the national ETS in China’s power generation industry. The study shows that: (1) according to the current benchmark value published by policy, the carbon allowance supply will exceed demand in all scenarios. (2) Regardless of the scenario, in order to balance the supply and demand of allowance in the ETS, the effective benchmark value should be adjusted to 35th–50th quantile of the carbon emissions per unit power generation.

An improved QPSO-SVM-based approach for predicting the milling force for white marble in robot stone machining

2021 ◽  
pp. 1-21
Author(s):  
Fangchen YIN ◽  
Qinzhi JI ◽  
Chengwei Jin ◽  
Jing Wang
Keyword(s):  
Milling Process ◽  
Percentage Error ◽  
Support Vector ◽  
Model Parameters ◽  
Machining Parameters ◽  
Milling Force ◽  
White Marble ◽  
Quality Of Products ◽  
Inspection Data ◽  
Online Inspection

Milling force prediction is one of the most important ways to improve the quality of products and stability in robot stone machining. In this paper, support vector machines (SVMs) are introduced to model the milling force of white marble, and the model parameters in the SVMs are optimized by the improved quantum-behaved particle swarm optimization (IQPSO) algorithm. A set of online inspection data from stone-machining robotic manipulators is adopted to train and test the model. The overall performance of the model is evaluated based on the decision coefficient (R2), mean absolute percentage error (MAPE) and root mean square error (RMSE), and the results obtained by IQPSO-SVM are superior to those of the PSO-SVM model. On this basis, the relationship between the milling force of white marble and various machining parameters is explored to obtain optimal machining parameters. The proposed model provides a tool for the adjustment of machining parameters to ensure stable machining quality. This approach is a new method and concept for milling force control and optimization research in the robotic stone milling process.

Dynamics of the macromolecular composition of the biomass of microalgae in the morning under natural light. Model

2020 ◽  
pp. 45-52
Author(s):  
Alexander S. Lelekov ◽  
Anton V. Shiryaev
Keyword(s):  
Biochemical Composition ◽  
Initial Conditions ◽  
Natural Light ◽  
Photoautotrophic Growth ◽  
Structural Part ◽  
Basic Model ◽  
Microalgae Culture ◽  
Simulation Results ◽  
Structural Parts ◽  
Macromolecular Composition

The work is devoted to modeling the growth of optically dense microalgae cultures in natural light. The basic model is based on the idea of the two-stage photoautotrophic growth of microalgae. It is shown that the increase in the intensity of sunlight in the first half of the day can be described by a linear equation. Analytical equations for the growth of biomass of microalgae and its macromolecular components are obtained. As the initial conditions, it is assumed that at the time of sunrise, the concentration of reserve biomass compounds is zero. The simulation results show that after sunrise, the growth of the microalgae culture is due only to an increase in the reserve part of the biomass, while the structural part practically does not change over six hours. Changes in the ratio of the reserve and structural parts of the biomass indicate a change in the biochemical composition of cells.

The Condition for Absolute Stability of an Electroelastic Actuator Control System for Nanomechatronics

2020 ◽  
Vol 10 (10) ◽  
pp. 52-58
Author(s):  
Sergey M. AFONIN ◽  
Keyword(s):  
Control System ◽  
Adaptive Optics ◽  
Absolute Stability ◽  
Deformation Characteristic ◽  
Straight Line Segment ◽  
Control Mechanisms ◽  
Relative Width ◽  
Random Inputs ◽  
Deformation Control ◽  
Actuator Control

An electroelastic actuator for nanomechatronics is used in nanotechnology, adaptive optics, microsurgery, microelectronics, and biomedicine to actuate or control mechanisms, systems based on the electroelastic effect, and to convert electrical signals into mechanical displacements and forces. In nanomechatronic systems, a piezoactuator is used in scanning microscopy, laser systems, in astronomy for precision alignment, for compensation of temperature, gravitational deformations and atmospheric turbulence, focusing, and stabilizing the image. In this study, a condition for absolute stability of an electroelastic actuator control system for nanomechatronics under deterministic and random inputs is obtained. A number of equilibrium positions in an electroelastic actuator mechatronic control system are found, the totality of which is represented by a straight line segment. The electroelastic actuator’s deformation control system dead band relative width is determined for the actuator’s symmetric and asymmetric hysteresis characteristics. Under deterministic inputs and with fulfilling the condition for the derivative of the nonlinear hysteresis actuator deformation characteristic, the set of equilibrium positions of the electroelastic actuator control system for nanomechatronics is absolutely stable. Under random inputs, the system absolute stability with respect to the mathematical expectations of the electroelastic actuator mechatronic control system equilibrium positions has been determined subject to fulfilling the condition on the derivative of the actuator hysteresis characteristic.

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