scholarly journals Optimization Design of the Spaceborne Connecting Structure for a Lightweight Space Camera

2020 ◽  
Vol 10 (22) ◽  
pp. 8249
Author(s):  
Mengqi Shao ◽  
Lei Zhang ◽  
Xuezhi Jia
Keyword(s):  
Optimization Design ◽  
Parametric Optimization ◽  
Analysis Data ◽  
Optimization Method ◽  
Variable Density ◽  
Line Of Sight ◽  
Relative Deformation ◽  
Engineering Analysis ◽  
Satellite Platform ◽  
Design Requirements

For a lightweight space camera installed vertically with a satellite platform, due to the different conditions between ground and orbit, the relative deformation between the camera and the satellite platform results in a drift of the camera line of sight (LOS), which affects the imaging quality. This paper proposed an optimization method for the spaceborne connecting structure considering the camera LOS drift. By using a variable density topology optimization method, the configuration of the connecting structure was obtained. Based on the configuration, the sensitivity of its size parameters to the system’s performance was analyzed. Analysis data showed that the size parameters have an obvious influence on the camera LOS shift. In order to obtain the optimal combination of size parameters, a multi-objective parametric optimization model was established. Finally, engineering analysis of the optimized structure showed that the system performances meet the design requirements of the satellite, and the lightweight ratio of the connecting structure reaches 54%. This study provides a reference for the design of other similar structures for space cameras.

scholarly journals Fully Parametric Optimization Designs of Wing Components

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zhendong Hu ◽  
Ju Qiu ◽  
Fa Zhang
Keyword(s):  
Optimization Design ◽  
Systematic Approach ◽  
Parametric Optimization ◽  
Structural Strength ◽  
Optimization Technique ◽  
Optimization Method ◽  
Operating Costs ◽  
Traditional Design ◽  
Structure Changes ◽  
Wing Optimization

An optimization technique called shape-linked optimization, which is different from the traditional optimization method, is introduced in this paper. The research introduces an updated wing optimization design in an effort to adapt to continuous structure changes and shapes while optimizing for a lighter weight of the structure. The changing tendencies of the thickness of wing skins and the cross-section areas of the wing beams are fitted to continuous polynomial functions, whose coefficients are designed as variables, which is a different engineering approach from the size variants of the thickness and the area in the traditional optimization. The structural strength, stiffness, and stability are constraints. Firstly, this research unearths the significance of utilizing a modernized optimization process which alters the production of the traditional 12 or over 12 segment wing design and applies new approaches and methods with less variables that contribute to expedited design cycles, decreased engineering and manufacturing expenditures, and a lighter weight aircraft with lower operating costs than the traditional design for the operators. And then, this paper exemplifies and illustrates the validity of the above claims in a detailed and systematic approach by comparing traditional and modernized optimization applications with a two-beam wing. Finally, this paper also proves that the new optimized structure parameters are easier than the size optimization to process and manufacture.

Synthesis of High-Precision Missile Homing System Using Proportional Guidance Method

2020 ◽  
Vol 21 (4) ◽  
pp. 242-248
Author(s):  
Do Quang Thong
Keyword(s):  
High Precision ◽  
Parametric Optimization ◽  
Initial Conditions ◽  
Dynamic Parameter ◽  
Optimization Method ◽  
Line Of Sight ◽  
Initial Condition ◽  
Optimal Parameters ◽  
Ballistic Missiles ◽  
Low Visibility

Modern air targets are characterized by low visibility, high maneuverability and high survivability. In addition, for some specific targets, for instance ballistic missiles, in order to defeat them the missile need tobe guided and carried out direct hit, i.e. "hit to kill". Therefore, in this paper, we present a high-precision missile homing system (MHS) using the proportional guidance method for firing at the highly maneuverable targets. Specifically, we propose a parametric optimization method for choosing a set of optimal parameters of the missile homing system for each dynamic parameter set of the missile. In addition, the paper gives the recommendations of choosing the initial conditions for the synthesis of missile homing system. In our experience, we should choose the small initial condition for synthesizing the missile homing system. Finally, the article also investigates the influence of systematic error in determining the speed, normal acceleration of missiles and the angular velocity of the line of sight of the missile and target on the accuracy of the missile homing system. We implement the proposed missile homing system and the parametric optimization method in Matlab. The experimental results illustrate that, using proposed system and the parametric optimization method, the missile can defeat the modern air targets with low visibility, high maneuverability and high survivability. 

Vertical Tail Topology Optimization Design Based on the Variable Density Method with Constraint Factor

2013 ◽  
Vol 300-301 ◽  
pp. 280-284 ◽  
Author(s):  
Fu Sheng Qiu ◽  
Wu Qiang Ji ◽  
Hou Chao Xu
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Optimization Method ◽  
Optimality Criteria ◽  
Variable Density ◽  
Structural Constraints ◽  
Structural Topology ◽  
Interpolation Model ◽  
Constraint Factor ◽  
Density Method

The topology optimization design problem with multiple constraints for the complex vertical tail structure is studied in this paper. The variable density structural topology optimization method is improved by introducing a constraint factor. According to the different structural constraints and design requirements, variable factors and element pseudo density are initialized via finite element method. This method is controlled by the constraint factors, and the improved method combining with Rational Approximation of Material Properties (RAMP) density-stiffness interpolation model with optimality criteria methods (OC), the vertical tail’s stiffness optimization has been finished. The density-stiffness interpolation model, the mathematical model of variable density method with constraint factor, the structural optimization model, the solution model of the OC method, the design variables iterative format, are given in this paper and the algorithm with Matlab program is realized. Lastly, a sample vertical tail case is introduced to validate the feasibility of the algorithm by operating the results and analyzing the data.

Topology Optimization Design of Gearbox Housing in Electric Bus

2014 ◽  
Vol 574 ◽  
pp. 173-178
Author(s):  
Ling Ling ◽  
Yong Huang
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Variable Density ◽  
Element Analysis ◽  
Design Constraint ◽  
Electric Bus ◽  
Final Design ◽  
Virtual Prototyping Technology ◽  
Design Requirements ◽  
Strength And Stiffness

The virtual prototyping technology in corporation with a finite element analysis was first used to analyze the strength and stiffness of gearbox casing in an electric bus. On the basis of this analysis, the topology optimization technology (TOT) based on the variable density method was introduced into the design of gearbox casing which takes the minimized total flexibility of gearbox as the objective function, the density of each cell as the design variable and the volume as the design constraint. Then, according to the results of topology optimization and the requirements of manufacturing process, the structure of gearbox casing was designed in detail. Finally, the stress analysis of the housing model of the final design was carried out. The results show that the optimized housing not only meets the design requirements of stiffness and strength, but also reduces its quality, which can make the performance of gearbox achieve optimal.

Parametric Optimization Design on Mine Carrier Robot

2011 ◽  
Vol 346 ◽  
pp. 353-358
Author(s):  
Juan Wei ◽  
Hong Wei Ma
Keyword(s):  
Optimization Design ◽  
Parametric Optimization ◽  
Optimization Method ◽  
Virtual Prototype ◽  
Rigid Bodies ◽  
Path Model ◽  
Best Value ◽  
Virtual Prototype Technology ◽  
Solid Works ◽  
Parameterization Model

To a virtual prototype technology for tools，to a movement stationary of the carrier robot for goal, studied on the parametric optimization method based on virtual prototype technology. The paper designed the carrier robot mechanical structure and established the robot parameterization model in Solid Works, divided the robot into twelve rigid bodies, sixteen hinges and two elementary forces. Transferred the rigid bodies models into Universal Mechanism, added the bound hinges and the elementary forces, set the track irregularity model and path model. By computer simulations technology, took the wheelbase for example, introduced the selection method of the best value. The method can be applied to make certain the other parameters of the robot.

Optimization Design of Vehicle Frame Based on ANSYS

2012 ◽  
Vol 590 ◽  
pp. 341-345 ◽  
Author(s):  
Yong Hai Wu
Keyword(s):  
Topology Optimization ◽  
Structural Design ◽  
Optimization Design ◽  
Structural Model ◽  
Optimization Method ◽  
Variable Density ◽  
Safety Performance ◽  
Frame Structure ◽  
Ansys Software ◽  
Special Vehicle

A special vehicle frame as the research object, its topology optimization mathematical model and its algorithm is established based on variable density method. Topology optimization method of continuum structures is applied to the frame structural design of this special vehicle using Optistruct solver. Take the least flexibility of frame as design goal; topology optimization design of frame structure was carried under the condition of flexure, torsion and flexure-torsion. New structural model of frame was determined according to results of topology optimization and engineering experience. The calculation of the stress, deformation and the volume for optimization results was conducted with ANSYS software, and compared with the data before optimization. The results showed that the safety performance of optimized frame improved, and the weight reduced.

Optimization and dynamic simulation of electric actuator transmission based on high precision ball screw

2020 ◽  
pp. 1-9
Author(s):  
Haoxin Zheng ◽  
Minghui Huang ◽  
Lihua Zhan ◽  
Peiyao Liu ◽  
Ziqing Zhu
Keyword(s):  
Optimization Design ◽  
Optimization Method ◽  
Ball Screw ◽  
Servo Motor ◽  
Electric Actuator ◽  
Transmission Reduction ◽  
Load Characteristics ◽  
Design Requirements ◽  
Motor Load ◽  
Dynamics Simulations

The actuator is an important component of missiles and other aircraft to maintain the flight attitude. A method to calculate the power of the electric servo motor was proposed according to the load characteristics’ of both the servo motor and actuator. An optimization method for the transmission reduction ratio was obtained by considering the load torque equation. Dynamics simulations of the actuator were conducted under a variety of conditions. The simulation results show that the clearance and the friction between the ball screw and the fork, which consist of the transmission mechanism, induce the torque fluctuations, as a source of noise in the motor load. According to the optimization design of the Electric, the Actuator prototype has passed the test, the performance meets the design requirements.

Reliability Optimization Design of Spacecraft Valve Spring

2012 ◽  
Vol 538-541 ◽  
pp. 851-857
Author(s):  
Ye Lin ◽  
Wei Min Cui ◽  
Bi Feng Song
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Mathematic Model ◽  
Optimization Method ◽  
Reliability Optimization ◽  
Mechanical Reliability ◽  
Reliability Design ◽  
Valve Spring ◽  
Design Requirements ◽  
Mechanical Optimization

Firstly, methodology of valve spring’s static strength and fatigue strength reliability analysis is built up, and detailed computational formulas to derive distributions of the stress and strength are described. Secondly, to make full use of the material characteristic and consider reliability of the mechanism part, taking the spring’s mass as the objective function and based on spring’s traditional and reliability constraints, mathematic model of reliability optimization design of valve spring is established using mechanical reliability design method and mechanical optimization design method. At last, the proposed method is applied to a practical spring design example by integrating optimization tools with the optimization model. The comparison of reliability optimization design results and traditional optimization design results shows that the reliability optimization method is practical and reliable; its design results can satisfy all design requirements with smaller mass.

scholarly journals Emotional Fusion and Design Optimization Method Based on Kansei-AD: A Case Study of Laser Additive Manufacturing Equipment

2020 ◽  
Author(s):  
Mingyu Ma ◽  
Xingyu Jiang ◽  
Weijun Liu ◽  
Xu Wang ◽  
Chen Zhao ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Optimization Design ◽  
Axiomatic Design ◽  
Optimization Method ◽  
Functional Domain ◽  
Emotional Needs ◽  
Laser Additive Manufacturing ◽  
Manufacturing Equipment ◽  
Design Elements ◽  
Design Requirements

Abstract To improve the level of integration between the psychological and emotional needs of laser additive manufacturing equipment personnel and the cognitive interactive design of human-machine systems, an emotional optimization design method for laser additive manufacturing equipment based on Kansei engineering and axiomatic design (Kansei-AD) is proposed. By exploring the emotional cognitive process of personnel on equipment, the representation means of the psychological and emotional needs of personnel are clarified. To clarify the psychological and emotional needs of users, the Kansei semantic difference experiment is applied to determine the user domain of axiomatic design. To resolve the difficulty of accurately mapping and expressing between user emotional factors and design elements in the design process, a combination of rough analytic hierarchy process (rough AHP) and quality function deployment (QFD) is used in the functional domain to determine the user Kansei design needs. In addition, the mapping relationship between Kansei design requirements and design requirements is judged by independent axioms of axiomatic design. A matrix of morphological elements-design requirements is constructed, and the morphological design elements that meet the psychological and emotional needs of personnel are determined using the GRA-TOPSIS method. LDM4030 laser coaxial powder feeding equipment is taken as an example to verify the feasibility of the optimization method. The result shows that the method effectively optimizes the design of the equipment according to the psychological and emotional needs of personnel. It provides a new research idea for the psychological and emotional design of laser additive manufacturing equipment.

Engineering Applications of Satellite Structural Optimization Utilizing ANSYS/CATIA

2011 ◽  
Vol 110-116 ◽  
pp. 1567-1575
Author(s):  
Jia Mao ◽  
Wei Hua Zhang
Keyword(s):  
Optimization Design ◽  
Parametric Design ◽  
Reference Value ◽  
Optimization Method ◽  
Design Parameters ◽  
Element Analysis ◽  
Fea Model ◽  
Satellite Platform ◽  
Weight Design ◽  
Work Done

A structured frame for the design optimization problem of satellite platform structure was established through the definition, flow and modification research of design parameters in the ANSYS/CATIA system. Problems with creating complex satellite structure FEA (Finite Element Analysis) models were discussed, including the idealization of real structure, as well as embedment of APDL (ANSYS Parametric Design Language) programme developed specially for the pre-processing and post-processing of FEA model. The optimization model was established under structural design requirements, and a graded optimization method was applied for calculation. Light-weight design schemes for two satellite platform structure were obtained through the subsequently optimization implemented using approaches put forward previously. The optimization design problems of two satellite platform structure were settled well, and work done in this paper provides certain reference value for optimization of other spacecraft structures.

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