Integrated optimization method for coupling parametrization design of complex space system

2012 ◽  
Author(s):  
Ming Wen ◽  
Cheng-shan Han
Keyword(s):  
Complex Space ◽  
Optimization Method ◽  
Space System ◽  
Integrated Optimization

IFCIP: An integrated optimization method for planning filters in fluid power systems under uncertainty

2011 ◽  
Vol 43 (3) ◽  
pp. 329-348 ◽  
Author(s):  
S. L. Nie ◽  
Y. L. Zheng ◽  
Y. P. Li ◽  
S. Peng ◽  
G. H. Huang
Keyword(s):  
Power Systems ◽  
Optimization Method ◽  
Fluid Power ◽  
Integrated Optimization ◽  
Fluid Power Systems

Integrated Optimization of Principal Dimensions Based on EEDI and Minimum Propulsion Power

2021 ◽  
Author(s):  
Yanxia Wang ◽  
Wenyu Sun ◽  
Qiang Zhao
Keyword(s):  
Energy Efficiency ◽  
Optimization Model ◽  
Evaluation Method ◽  
Science Research ◽  
Optimization Method ◽  
Power Reduction ◽  
Integrated Optimization ◽  
Calculation Results ◽  
Digital Pattern ◽  
Propulsion Power

Abstract An integrated optimization model of EEDI and minimum propulsion power has been established in this paper. EEDI optimization needs to meet IMO requirements for minimum propulsion power. Installed power reduction is one of the most effective way to optimize EEDI, but it will make the installed power lower than IMO requirements. From the view of security, it is not allowed. In order to coordinate the contradiction between the reduction of EEDI and the minimum propulsion power of the ship, this paper is devoted to the development of an effective and efficient EEDI optimization method under the minimum propulsion power constraints of the ship. The evaluation method of the objective function EEDI is a digital pattern of hydrodynamics performance for tanker series developed by the China Ship Science Research Center. In order to illustrate the method, the VLCC is selected as the research object, and Non-dominated Sorting Genetic Algorithms II is selected to optimize the EEDI. The calculation results show that energy efficiency has been optimized about 4%, so the EEDI and minimum propulsion power integrated optimization model are reasonable and effective.

The Basic Study of Dynamic Walking Aids Based on Gait Stability

2010 ◽  
Vol 26-28 ◽  
pp. 1242-1246
Author(s):  
Jun Xia Zhang ◽  
Ze Wang ◽  
Yun Yun Zhang
Keyword(s):  
Mechanical Design ◽  
Low Cost ◽  
Optimization Method ◽  
Dynamic Walking ◽  
Basic Study ◽  
Gait Stability ◽  
Integrated Optimization ◽  
Experiment Platform ◽  
Walking Aids ◽  
Walking Aid

Aiming at the present gait instable walking-aid, a low cost walking-aid research platform is designed in this paper. The paper developed a dynamic walking aids mechanical design process which based on the study of body's gait stability and motion parameters, analyzed the structural design of the walking aids in ergonomic principles. Furthermore, based on the ZMP gait stability theory, adopting a composed design/integrated optimization gait planning method to program the gait of normal walkers and wearers. Adjusting the ankle joint to the rear foot and the trajectory of the hip’ abscissa is integrated to modify the actual ZMP trajectory to the ideal ZMP trajectory. The proposed composed design/integrated optimization method greatly simplifies the programming process and provides a good experiment platform for walking aid teaching and scientific research.

scholarly journals Integrated Optimization of Mixed Cargo Packing and Cargo Location Assignment in Automated Storage and Retrieval Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Bin Lei ◽  
Zhaoyuan Jiang ◽  
Haibo Mu
Keyword(s):  
Genetic Algorithm ◽  
Heuristic Algorithm ◽  
Retrieval System ◽  
Packing Problem ◽  
Optimization Method ◽  
Integrated Optimization ◽  
Storage And Retrieval ◽  
Location Assignment ◽  
Automated Storage ◽  
Delivery Efficiency

To improve the delivery efficiency of automated storage and retrieval system, the problem of the integrated optimization of mixed cargo packing and cargo location assignment is addressed. An integrated optimization model of mixed cargo packing and location assignments with the shortest time for the stacker in a certain historical period is established and is transformed into a conditional packing problem. An improved hybrid genetic algorithm based on a group coding method is designed to solve the problem. When the initial population is generated, a new heuristic algorithm is designed to improve the convergence speed of the genetic algorithm considering the correlation and frequency of the goods outbound. A heuristic algorithm for a two-dimensional rectangular-packing problem is designed to determine whether a variety of goods can be mixed in packing. Taking actual data from an automated storage and retrieval system for an aviation food company as an example, the established model and design algorithm are verified and the influence of changes in the outbound delivery orders on the optimization result is analyzed. The results show that compared to the method of separate storage of goods based on cube-per-order index rules and a phased optimization method of mixed storage of goods, an integrated optimization method of mixed cargo packing and location assignment can improve the outbound delivery efficiency of the stacking machine by 11.43–25.98% and 1.73–5.51%, respectively, and reduce the cargo location used by 50–55% and 0–10%, respectively. The stronger the correlation of the goods leaving a warehouse, the greater the potential of the design method in this paper to improve the efficiency of the stacker.

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