Analytical Model and Computing Optimization of a Compliant Gripper for the Assembly System of Mini Direct-Current Motor

2021 ◽  
Vol 12 (1) ◽  
pp. 1-28
Author(s):  
Ngoc Le Chau ◽  
Nhat Linh Ho ◽  
Ngoc Thoai Tran ◽  
Thanh-Phong Dao
Keyword(s):  
Direct Current ◽  
Design Method ◽  
Theoretical Models ◽  
Pso Algorithm ◽  
Assembly System ◽  
Amplification Ratio ◽  
Direct Current Motor ◽  
Tlbo Algorithm ◽  
Good Accord ◽  
Kinematic Models

This study proposes a combination of kinematics-based design method, statistic method, and TLBO algorithm to solve computing optimization for a compliant gripper. It is employed in an assembly system of mini direct current motor. First, the kinematic models of the gripper are developed. The static model is paid attention. Next, the dynamic model is established based on Lagrange's principle. Then, a multi-criteria optimization for the gripper is conducted by Taguchi method integrated with TLBO algorithm. Finally, the FEA and experiments are implemented to verify the optimal results and evaluate the performances of the compliant gripper. The results indicated that theoretical models are in good accord with the results from simulations and experiments. Additionally, the performance of the present method is superior to PSO algorithm. The results revealed that the compliant gripper allows a displacement up to 3000 µm and the amplification ratio of 12 times. The compliant gripper is a potential application for the mini direct-current motor assembly system.

The Performance Analysis and Motor Design of Electronic Water Pump Based on Pumplinx and Maxwell

2021 ◽  
Vol 14 ◽  
Author(s):  
Mingyue Zhang ◽  
Xiaobin Fan ◽  
Feng Wang ◽  
Jing Gan
Keyword(s):  
Direct Current ◽  
Cooling System ◽  
Design Method ◽  
Maximum Efficiency ◽  
Water Pump ◽  
Running Water ◽  
Direct Current Motor ◽  
Pump Head ◽  
Electric Water Pump ◽  
Brushless Direct Current Motor

Background: For the cooling system of the traditional new-type engine and new-energy vehicle, the water pump is the core of them. If the design of the water pump is not reasonable, the engine will be overcooled or overheated, which will affect the efficiency of the engine. Therefore, it is significant to propose a design method of electronic water pump for automobiles based on active regulation. Objective: In this study, an electric water pump was designed according to the condition in n = 4200r/min, Q = 90L/min, and H ≧ 4.4m. The flow, head, and efficiency and power of this electric water pump will be discussed. And a brushless direct current motor for this pump was designed and analyzed. Methods: The flow details of the pump, such as pressure distribution, velocity distribution, and turbulent kinetic energy distribution were obtained by Pumplinx. The head, efficiency, and power of the pump were established by the analysis of the flow field of the pump. Then, based on the working conditions of the pump mentioned above, a brushless direct current motor for the pump was designed by Maxwell and its performance was also analyzed. Results: The experimental results showed that the maximum efficiency of the motor reached 72%, the maximum efficiency point of the motor was near the rated speed, and the efficiency of the motor at rated power was 66.31%. Conclusion: The results showed that the complex condition of running water inside the pump can be exactly stimulated by the Computational Fluid Dynamics technique, especially about the pump head and its efficiency, which provided the theoretical foundation for the later application research and development of automotive electronic water pump.

Median Morphological Filter Design Based on the PSO Algorithm

2011 ◽  
Vol 128-129 ◽  
pp. 181-184
Author(s):  
You Lian Zhu ◽  
Cheng Huang
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Signal To Noise Ratio ◽  
Pso Algorithm ◽  
Morphological Operations ◽  
Morphological Filter ◽  
Signal To Noise ◽  
Noise Ratio ◽  
The Cost ◽  
Filter Design Method

Design of morphological filter greatly depends on morphological operations and structuring elements selection. A filter design method used median closing morphological operation is proposed to enhance the image denoising ability and the PSO algorithm is introduced for structural elements selecting. The method takes the peak value signal-to-noise ratio (PSNR) as the cost function and may adaptively build unit structuring elements with zero square matrix. Experimental results show the proposed method can effectively remove impulse noise from a noisy image, especially from a low signal-to-noise ratio (SNR) image; the noise reduction performance has obvious advantages than the other.

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