Structure Parameters Optimization and Simulation Experiment of Auger in Lunar Soil Drill-sampling Device

2012 ◽  
Vol 48 (23) ◽  
pp. 10 ◽  
Author(s):  
Ye TIAN
Keyword(s):  
Simulation Experiment ◽  
Lunar Soil ◽  
Parameters Optimization ◽  
Structure Parameters ◽  
Sampling Device ◽  
Optimization And Simulation

Optimization Design and Analysis for Pre-Shift Control Parameters of Wet Dual Clutch Transmissions Based on Dynamic Modeling of Synchronizer

2019 ◽  
Author(s):  
Ke Zheng ◽  
Jianjun Hu ◽  
Bangzhi Wu ◽  
Yin Wang
Keyword(s):  
Energy Loss ◽  
Optimization Design ◽  
Cone Angle ◽  
Optimization Method ◽  
Parameters Optimization ◽  
Hydraulic Loss ◽  
Structure Parameters ◽  
Control Parameters ◽  
Shift Quality ◽  
Trigger Time

Abstract The DCTs have increased in prevalence for achieving power uninterrupted shifting and pre-shift process significantly influences the DCTs shift quality. Research on the multistage and nonlinear characteristics of the gear preselect process is not comprehensive so that there are shortcomings such as high impact, long synchronization time and poor economy. In view of above detrimental phenomenon, control parameters optimization is conducted in order to realize fast, smooth and economic pre-shifting on the basis of analyzing the sensitivity of the factors affecting pre-shift process. Considering the engagement of sleeve, synchro ring and dog gear, the multi-body dynamics theory is applied to establish an accurate synchronizer dynamics model. Based on the model, simulations are conducted to confirm factors like sleeve mass, cone angle fluctuating the pre-shift quickness and smoothness, sorting structure parameters according to factors sensitivity. Furthermore, the formula of energy loss characteristics relating to two control parameters which are pre-shift force and pre-shift trigger time is obtained, deriving from exploring the hydraulic loss caused by pre-shift force and the drag torque energy loss created by pre-shift trigger time. The optimal synchronizer structure parameters are obtained by adopting multi-objective optimization method. Simulation results indicate the optimal control parameters improve pre-shift comprehensive performance including quickness, smoothness and economy compared with conventional scheme.

Double Wishbone Independent Suspension Parameter Optimization and Simulation

2014 ◽  
Vol 574 ◽  
pp. 109-113 ◽  
Author(s):  
Guang Tian ◽  
Yan Zhang ◽  
Jin Hua Liu ◽  
Xin Jie Shao
Keyword(s):  
Parameter Optimization ◽  
Optimization Design ◽  
Suspension System ◽  
Parameters Optimization ◽  
Front Suspension ◽  
Suspension Parameters ◽  
Optimization And Simulation ◽  
Suspension Performance

The wheeled armoredvehicle double wishbone independent suspension system, established the double wishbone suspension arm model, and optimized analysis. Optimization results show that: the suspension parameters optimization design, the front suspension performance has been greatly improved.

Design and Simulation of Bi-Directional Hydraulic Lock Used in Hydraulic System for Controllable Pitch Propeller

2012 ◽  
Vol 468-471 ◽  
pp. 852-856
Author(s):  
Shuai Huang ◽  
Jing Li ◽  
Jin Feng Zhang ◽  
Yun Chen ◽  
Yao Bao Yin
Keyword(s):  
Modeling And Simulation ◽  
Hydraulic System ◽  
Dynamic Performance ◽  
Hydraulic Cylinder ◽  
Parameters Optimization ◽  
Structure Parameters ◽  
Large Flow

This paper designs a bi-directional hydraulic lock used in a large flow hydraulic system for controllable pitch propeller. The lock is used to resist the hydraulic cylinder shifting when the pitch reaches the presetting situation. The structure parameters of the lock are obtained by static design, and the dynamic performance of it is analyzed by modeling and simulation with the system on rated load. The dynamic simulating discovers the faults of the lock designing by static calculating and the results provide sufficient supports for its parameters optimization.

Study of a Lithium Battery Automatic Shell Control System Algorithm

2015 ◽  
Vol 738-739 ◽  
pp. 1039-1047
Author(s):  
Xian Ming Liu ◽  
Guo Ping Liu
Keyword(s):  
Lithium Battery ◽  
Parameters Optimization ◽  
Practical Significance ◽  
Kinematics And Dynamics ◽  
Structure Parameters ◽  
Important Process ◽  
Nsga Ii ◽  
Core Set ◽  
Complete Set ◽  
Machine Structure

set of shell is an important process on lithium battery production line. Research is applicable to automatic set of lithium battery shell of an organization, the installed baffle set into the very core of battery shell, do not harm the very core, set into the very core of the exposed aluminum shell of the same length. This article put forward from the aspects of kinematics and dynamics of multiple optimization objectives, work in a given space and a variety of constraint conditions, with the aid of the NSGA - II algorithm to complete set of shell machine structure parameters optimization, experiments show that the casing precision of the equipment, set of shell and the percent of pass is up to 99 above, has a certain practical significance.

scholarly journals Optimization of Structure Parameters of the Grouser Shoes for Adhesion Reduction under Black Soil

Agriculture ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 795
Author(s):  
Jun Fu ◽  
Jian Li ◽  
Xinlong Tang ◽  
Ruixue Wang ◽  
Zhi Chen
Keyword(s):  
Adhesion Force ◽  
Reference Method ◽  
Soil Mass ◽  
Black Soil ◽  
Parameters Optimization ◽  
Structure Parameters ◽  
Tracked Vehicles ◽  
Average Value ◽  
Adhesion Ability ◽  
Adhesion Performance

The black soil of Northeast China has a strong adhesion ability because of its unique physical properties, and the soil often adheres to the surface of the grouser shoes of tracked vehicles during the operation. The adhesion performance depends largely on structure parameters of the grouser shoes. The grouser height, the grouser thickness, and the grouser splayed angle were selected as structure parameters. The adhesion force and adhesive soil mass were selected as indicators of adhesion performance. Therefore, the mathematical model between structure parameters and response indicators was established by the response surface method (RSM). The optimal parameters combination was that the grouser height was 20 mm, grouser thickness was 6.34 mm, and grouser splayed angle was 40.45°. The average data of verification experiments occurred when the adhesion force reached 1.11 kPa and adhesive soil mass reached 22.68 g. Compared with the average value of un-optimized experiment results, the adhesion force and adhesive soil mass reduced by 12.84% and 4.63%, respectively. The relative error of the predicted values and measured values was less than 5%, proving the reliability of the regression models. This study could provide a reference method for parameters optimization, and a new structure of the grouser shoes of tracked vehicles will be designed to reduce adhesion.

A Novel PID Controller Parameter Optimization Method

2015 ◽  
Vol 738-739 ◽  
pp. 1077-1081
Author(s):  
Juan Wei
Keyword(s):  
Parameter Optimization ◽  
Pid Controller ◽  
Simulation Experiment ◽  
Optimal Allocation ◽  
Optimization Method ◽  
Parameters Optimization ◽  
Key Factors ◽  
Controller Parameter ◽  
Time Integral ◽  
Optimal Functions

For the difficulties of PID controller parameter optimization, we have put forward a novel depiction method PPOGS (PID Parameters Optimization based on Glowworm Swarm). By combining the minimum error absolute time integral definition proportion, the objective optimal functions of integral and differential functions, this method can produce the optimal allocation with the help of the glowworm swarm algorithm which seeks solution to the objective function. At last, we use MATLAB to make a simulation experiment, conducting an in-depth investigation of the key factors influencing the method. The results have showed PPOGS has better adaptability compared with other methods Key words: PID controller; parameter optimization; glowworm swarm; simulation

scholarly journals Research on a lunar mobile spiral surface-soil sampler

2020 ◽  
Vol 12 (7) ◽  
pp. 168781401881711
Author(s):  
Xuyan Hou ◽  
Hongwei Guo ◽  
Pan Cao ◽  
Pingping Xue ◽  
Tianfeng Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Soil ◽  
Physical And Mechanical Properties ◽  
Lunar Soil ◽  
Discrete Element Simulation ◽  
Sampling Device ◽  
Element Simulation ◽  
Lunar Environment ◽  
Spiral Surface ◽  
Contact Parameters

This article presents the design of a spiral sampling device to perform lunar soil sampling and packaging, considering the special lunar environment and the physical and mechanical properties of the lunar soil. Combining the mechanical properties of lunar soil and the geometrical characteristics of the sampling device, the contact model between particles and the contact parameters between device and particles were adjusted. Through a discrete element simulation of the sampling process, the particles’ streamline, which is between the screw conveying modules and the sampling bailer, is derived. This result provides a theoretical foundation for the structural optimization of the device. Finally, a sampling experiment in simulated lunar soil verifies the feasibility of the sampling device.

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