An optimized design scheme for underwater cleaning robot

2020 ◽  
Vol 5 (1) ◽  
pp. 12-25
Author(s):  
Lechen Zhang ◽  
Penghui Li ◽  
Shunyu Luo ◽  
Gengzhi He
Keyword(s):  
Optimized Design ◽  
Design Scheme ◽  
Cleaning Robot

scholarly journals Optimized Design and Analysis of Offshore Beidou Maritime Foundation Reinforcement System Pseudolite Ranging-Codes

2017 ◽  
Vol 24 (s2) ◽  
pp. 45-52
Author(s):  
Deliang Su ◽  
Anan Zhou ◽  
Zilin Zhou ◽  
Wei Chen
Keyword(s):  
Navigation System ◽  
Spectral Characteristics ◽  
Design Parameters ◽  
Optimized Design ◽  
System Availability ◽  
Design Scheme ◽  
Performance Requirements ◽  
Navigation Signal ◽  
Satellite Positioning ◽  
Signal Environment

Abstract Under the bad sea conditions and weak Beidou navigation signal environment, it is difficult to locate the ship on the sea, and the Beidou navigation system can’t work well. Beidou pseudolite system can improve the performance of Beidou navigation system as a navigation signal transmitter fixed on the ground, the signal of which can improve satellite positioning constellation structure, and improve the system availability reliability and precision. In order to ensure the interoperability and non-correlation of the Beidou pseudolite and the Beidou navigation system, the pseudolite ranging-codes should be selected in the same code space of the satellite ranging-codes and the residual pseudo random code generated by the 2 taps design scheme does not satisfy the performance requirements of the ranging-codes. To solve this issue, a combined design scheme with 3 taps is proposed, and 12 kinds of pseudolite ranging-codes are optimally selected according to the optimum design parameters of ranging-codes. The waveform and correlation of the selected pseudolite ranging-codes are analyzed by MATLAB, the acquisition simulation is carried out by using the new pseudolite ranging-codes. The experimental results show that the new 3-taps based ranging codes design scheme behaves a good balance, correlation and spectral characteristics.

scholarly journals Optimization Design of a Double-Channel Pump by Means of Orthogonal Test, CFD, and Experimental Analysis

2014 ◽  
Vol 6 ◽  
pp. 545216 ◽  
Author(s):  
Binjuan Zhao ◽  
Douhua Hou ◽  
Huilong Chen ◽  
Yu Wang ◽  
Jing Qiu
Keyword(s):  
Experimental Analysis ◽  
Optimization Design ◽  
Stokes Equations ◽  
Design Method ◽  
Reference Value ◽  
Orthogonal Test ◽  
Optimized Design ◽  
Range Analysis ◽  
Design Scheme ◽  
Double Channel

A new approach to optimizing a double-channel pump was presented, based on combined use of orthogonal test, computational fluid dynamics (CFD), and experimental analysis. First, a preliminary pump was designed according to design specifications, implementing the traditional design method. Later, a standard L9 (34) orthogonal table including 9 representative design schemes was implemented to find the best parameter combination for the impeller of the pump. Reynolds averaged Navier-Stokes equations accompanied by Smith modified k-ε turbulence model were solved to obtain the inner flow fields of the pump as well as its hydraulic performance for each design scheme. The optimized design scheme was obtained after range analysis. Finally, CFD analyses and experiments were carried out to evaluate the optimized design. The results show that the characteristics of the optimized pump were obviously improved, and the simulated pump head and efficiency increased by 3.622% and 9.379%, respectively. This research not only provides an effective way to improve the hydraulic design of double-channel pumps, but also has certain reference value in multiobjectiveoptimization design of other pumps.

scholarly journals Vibration characteristics of pressure pipelines at pumping stations and optimized design for vibration attenuation

2021 ◽  
Author(s):  
Yude Xu ◽  
Zijin Liu ◽  
Dongmeng Zhou ◽  
Junjiao Tian ◽  
Xinglin Zhu
Keyword(s):  
Vibration Reduction ◽  
Test System ◽  
Optimized Design ◽  
Vibration Signals ◽  
Pumping Station ◽  
Design Scheme ◽  
Pumping Stations ◽  
Pressure Pipeline ◽  
Simulation Results ◽  
Pipeline Vibration

Abstract To explore the effects of different pressure pipeline layouts on pumping station pipeline vibration, this study establishes an ALGOR numerical model for pipeline flow considering fluid–structure interactions. A data acquisition and signal processing vibration test system is used to obtain vibration signals and verify simulation results including pipeline fluid velocity, fluid pressure, and transient stress. Based on the flow's vibration excitation characteristics, we consider structural vibration reduction technology and propose an optimized design scheme. As an example, we apply this approach to a pressure pipeline at the Ningxia Yanhuanding Pumping Station Project. Results show strong vibrations at the water inlet, the junction between the branch and main pipes, and the water outlet, with even stronger vibration at the inlet than at the outlet. In the optimized design scheme, adjusting the distance between the branch pipes only weakly reduces flow-generated pipeline vibration; increasing the pipe diameter and changing the main pipe's relative orientation show stronger effects. Vibration reduction is optimized for a main pipe dip angle of 2–5° relative to the branch pipes, simultaneously decreasing pumping station energy loss. These results provide a theoretical and practical basis for optimal design of pressure pipelines at high-lift pumping stations. HIGHLIGHT This paper established fluid-structure interaction-based water flow ALGOR numerical model of pressure pipeline in pump station; meanwhile, DASP vibration test system is adopted to acquire the vibration signals to verify the simulation results, analyze the incentive characteristics of pressure pipeline flow form on pipeline vibration and put forward optimized design scheme.

Conceptual Design Program of Drilling Fixture to Create and Evaluation Methods

2011 ◽  
Vol 127 ◽  
pp. 130-133
Author(s):  
Bi Qiong Li ◽  
Zhi Tao Hu ◽  
Cheng Liu
Keyword(s):  
Conceptual Design ◽  
Evaluation Methods ◽  
Initial Solution ◽  
Optimized Design ◽  
Functional Layer ◽  
Optimal Scheme ◽  
Design Scheme ◽  
Design Program ◽  
Layer Analysis

This paper explores conceptual design of drilling fixture based on the functional layer analysis, the fuzzy judgment algorithm is introduced from the initial solution of principle to the final optimized design scheme. This paper describes the thoughts and algorithm of conceptual design of drilling fixture based on fuzzy judgment, this method in many schemes to choose the optimal scheme is feasible.

Based on the Optimize Design of C/S Framework Automation System of Power Plant and Substation

2014 ◽  
Vol 1028 ◽  
pp. 208-213
Author(s):  
Wu Yang Zhang ◽  
Ying Ming Wang ◽  
Yan Peng Zhang
Keyword(s):  
Power Plant ◽  
Automation System ◽  
Optimized Design ◽  
Heavy Load ◽  
Client Server ◽  
Design Scheme ◽  
Depth Analysis ◽  
Optimize Design ◽  
Substation Automation

Contrapose the difficulties of C/S (client/server) framework redundant switching, the great quantity of synchronic data, heavy load of the network, needs to be updated shock, etc, based on the working mode and characteristic of C/S framework Power plant and substation automation system to conduct in-depth analysis, an optimized design scheme of C/S framework automation system of Power plant and substation was proposed.

Theoretical Study on Optimized Design Scheme of Polarization Sounding by Airborne Lidar

2013 ◽  
Vol 50 (4) ◽  
pp. 040103
Author(s):  
刘厚通 Liu Houtong ◽  
赵建新 Zhao Jianxin
Keyword(s):  
Theoretical Study ◽  
Airborne Lidar ◽  
Optimized Design ◽  
Design Scheme

On Path Generation Method for Laser Cleaning Robot Based on Line Structured Light

2020 ◽  
Author(s):  
Qingzeng Ma ◽  
Dongbin Zhang ◽  
Shuo Jin ◽  
Yuan Ren ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Structured Light ◽  
Laser Cleaning ◽  
Path Generation ◽  
Cleaning Robot ◽  
On Line

A summary of beach nourishment in China: The past decade of practices

Shore & Beach ◽  
2020 ◽  
pp. 65-73
Author(s):  
Gen Liu ◽  
Feng Cai ◽  
Hongshuai Qi ◽  
Jianhui Liu ◽  
Gang Lei ◽  
...  
Keyword(s):  
Beach Nourishment ◽  
Developed Countries ◽  
Ecological Design ◽  
Optimized Design ◽  
Limited Information ◽  
Personal Communications ◽  
Design Considerations ◽  
The Past ◽  
Technological Advances ◽  
Urban Beaches

Beach nourishment has been widely used for beach protection around the world. However, there is limited information about beach nourishment in China. This study offers an overview of beach nourishment practices, status and technological advances in China, based on the literature, reports, and personal communications. The results demonstrate that beach nourishment has been recognized as an effective and environmentally friendly measure to combat coastal erosion and has been increasingly adopted in China, especially in the past decade. The unique characteristics of coastal China resulted in a difference in beach nourishment between China and Western developed countries in terms of the types, objectives, and shapes of beach nourishment. For the types of nourishments in China, there were approximately the same number of restored beaches and newly constructed beaches. For fill sediment, homogeneous fill and heterogeneous fill comprised 51.1% and 48.9% of projects, respectively. The objective of beach nourishment was mainly to promote coastal tourism, and the shape of nourished beaches was dominated by headland bays. This study also indicated that China has achieved a number of technological advances in beach nourishment, including methods of beach nourishment on severely eroded coasts and muddy coasts, an optimized design of drain pipes involved in urban beaches, and ecological design considerations. From the past decade of practices, four aspects were proposed as considerations for future nourishment: sand sources, technique advances, ecological effects, and management of beach nourishments.

Optimized design of high efficient voice coil actuator in deformable mirror

2020 ◽  
Vol 35 (11) ◽  
pp. 1110-1119
Author(s):  
Shuo CAO ◽  
◽  
Zhi-gao ZHANG ◽  
Zhi-yun ZHAO ◽  
Hu GU ◽  
...  
Keyword(s):  
Deformable Mirror ◽  
Optimized Design ◽  
High Efficient ◽  
Voice Coil Actuator
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