scholarly journals Optical system optimization method for as-built performance based on nodal aberration theory

2020 ◽  
Vol 28 (6) ◽  
pp. 7928
Author(s):  
Zhiyuan Gu ◽  
Yang Wang ◽  
Changxiang Yan
Keyword(s):  
Optical System ◽  
System Optimization ◽  
Optimization Method ◽  
Aberration Theory

On Measures of Coupling Between the Artifact and Controller Optimal Design Problems

2009 ◽  
Author(s):  
Diane L. Peters ◽  
Panos Y. Papalambros ◽  
A. Galip Ulsoy
Keyword(s):  
System Optimization ◽  
Optimization Method ◽  
Ease Of Use ◽  
Control Problems ◽  
Design Problems ◽  
Sensitivity Equations ◽  
Smart Products ◽  
Two Measures ◽  
And Control ◽  
Artifact Design

Optimization of smart products requires optimizing both the artifact design and its controller. The presence of coupling between the design and control problems is an important consideration in choosing the system optimization method. Several measures of coupling have been proposed based on different viewpoints of the system. In this paper, two measures of coupling, a vector based on optimality conditions and a matrix derived from an extension of the global sensitivity equations, are shown to be related under certain conditions and to be consistent in their coupling determination. The measures’ physical interpretation and relative ease of use are discussed using the example of a positioning gantry. A further relation is derived between one measure and a modified sequential formulation that would give results sufficiently close to the true solutions.

Harmonic Synthesis Design Methodology for Dynamic Spring Balancing

1996 ◽  
Vol 118 (4) ◽  
pp. 733-740 ◽  
Author(s):  
Eungsoo Shin ◽  
D. A. Streit
Keyword(s):  
Dynamic System ◽  
Initial Conditions ◽  
Phase 1 ◽  
System Optimization ◽  
Optimization Method ◽  
Optimization Techniques ◽  
System Response ◽  
Two Phase ◽  
Walking Machine ◽  
Synthesis Design

A new spring balancing technique, called a two-phase optimization method, is presented. Phase 1 uses harmonic synthesis to provide a system configuration which achieves an approximation to a desired dynamic system response. Phase 2 uses results of harmonic synthesis as initial conditions for dynamic system optimization. Optimization techniques compensate for nonlinearities in machine dynamics. Example applications to robot manipulators and to walking machine legs are presented and discussed.

scholarly journals Thermal management evaluation of the complex electro-optical system

2017 ◽  
Vol 21 (5) ◽  
pp. 2189-2196
Author(s):  
Srecko Nijemcevic ◽  
Milan Tasic ◽  
Branko Livada ◽  
Dragana Peric ◽  
Marko Tasic
Keyword(s):  
Temperature Distribution ◽  
Thermal Management ◽  
Optical System ◽  
Life Time ◽  
System Optimization ◽  
Working Environment ◽  
Outdoor Environment ◽  
System Component ◽  
Catastrophic Failure ◽  
Internal Temperature

The thermal management of a complex electro-optical system aimed for outdoor application is challenging task due to the requirement of having an air-sealed enclosure, harsh working environment, and an additional thermal load generated by sunlight. It is essential to consider the effect of heating loads in the system components, as well as the internal temperature distribution, that can have influence on the system life expectancy, operational readiness and parameters, and possibility for catastrophic failure. The main objective of this paper is to analyze internal temperature distribution and evaluate its influence on system component operation capability. The electro-optical system simplified model was defined and related thermal balance simulation model based on Solid Works thermal analysis module was set and applied for temperature distribution calculation. Various outdoor environment scenarios were compared to evaluate system temperature distribution and evaluate its influence on system operation, reliability, and life time in application environment. This work was done during the design process as a part of the electro-optical system optimization. The results show that temperature distribution will not be cause for catastrophic failure and malfunction operation during operation in the expected environment.

Optimization in a Design System for Complex Products

1992 ◽  
Author(s):  
Johan Malmqvist
Keyword(s):  
Parametric Design ◽  
System Optimization ◽  
Optimization Method ◽  
Design System ◽  
Design Problems ◽  
Design And Optimization ◽  
Complex Products ◽  
Knowledge Based ◽  
Product Models ◽  
Use Of Knowledge

Abstract This paper describes a system for parametric design and optimization of complex products. In the system, the use of knowledge-based and mathematical programming methods is combined. The motivation is that while knowledge-based methods are well suited for modeling products, they are insufficient when dealing with design problems that can be given an optimization formulation. This weakness was approached by including the information necessary for stating an optimization problem in the product models. A system optimization method can then be applied. The system also performs sensitivity analysis and has an interactive optimization module. The use of the system is illustrated by an example; the design and optimization of a two-speed gearbox.

A New Approach on Mounting Systems Optimization

2003 ◽  
Author(s):  
Reza Madjlesi ◽  
Amir Khajepour ◽  
Brad Schubert ◽  
Fathy Ismail
Keyword(s):  
Path Analysis ◽  
Optimization Technique ◽  
Optimization Procedure ◽  
System Optimization ◽  
Optimization Method ◽  
Trial And Error ◽  
Target Response ◽  
New Approach ◽  
Weakly Coupled ◽  
Noise Vibration

Vehicles are assemblies of subsystems or modules, which are developed in parallel at multiple locations and often for more than one vehicle. CAE software provides the integration of modules in a complete vehicle in parallel; however the whole system requires final adjustments and tunings. These adjustments, especially in suspensions and mounting systems are very time consuming and are generally based upon trial and error techniques. To reduce the number of trials, usually noise path analysis (NPA) is used. In this technique, the noise and vibration paths for each mount to the objective point are measured. Using the measured data, the dominant path is detected. A highly experienced NVH engineer now can use the information to tune the mount to satisfy the target response. This technique is appropriate if the subsystems are weakly coupled. This situation is not usually the case in engine mounting systems where any modification in one of the mounts may change the dominant path. An important step to reduce refinement time is to develop a method to obtain the overall model of the whole vehicle. In this paper, we introduce a new approach in vehicle’s NVH development. In this approach, the model of the vehicle for mounting system optimization is obtained based on the FRF synthesis. A hybrid analytical/experimental model of the vehicle is developed to predict the NVH response of the vehicle for any given mounting system. This model along with an optimization technique is used to arrive at the optimum mounting system for any objective function. The optimization method is linked with the noise path analysis (NPA), which is used to specify the dominant directions that the noise/vibration is transferred to the response point. These directions are used in the optimization procedure to find the optimum mounting system with minimum calculation time. Experimental results on a full size car are presented to evaluate new approach.

Finding new local minima by switching merit functions in optical system optimization

2005 ◽  
Vol 44 (10) ◽  
pp. 100501 ◽  
Author(s):  
Alexander Serebriakov ◽  
Florian Bociort ◽  
Joseph Braat
Keyword(s):  
Optical System ◽  
System Optimization ◽  
Local Minima ◽  
Merit Functions

Method of calculating the aberrations of soft X-ray and vacuum ultraviolet optical systems

2019 ◽  
Vol 26 (5) ◽  
pp. 1558-1564
Author(s):  
Yiqing Cao ◽  
Zhijuan Shen ◽  
Zhixia Zheng
Keyword(s):  
Optical System ◽  
Vacuum Ultraviolet ◽  
Optical Systems ◽  
Third Order ◽  
Order Accuracy ◽  
X Ray ◽  
Plane Symmetric ◽  
The Third ◽  
Aberration Theory ◽  
Ray Coordinates

Based on the the third-order aberration theory of plane-symmetric optical systems, this paper studies the effect on aberrations of the second-order accuracy of aperture-ray coordinates and the extrinsic aberrations of this kind of optical system; their calculation expressions are derived. The resultant aberration expressions are then applied to calculate the aberrations of two design examples of soft X-ray and vacuum ultraviolet (XUV) optical systems; images are compared with ray-tracing results using SHADOW software to validate the aberration expressions. The study shows that the accuracy of the aberration expressions is satisfactory.

Alignment off-axis optical system using Nodal Aberration Theory

2013 ◽  
Author(s):  
Bo Jiang ◽  
Si-zhong Zhou ◽  
Kai Jiang ◽  
Huai-yang Fu ◽  
Chao Mei
Keyword(s):  
Optical System ◽  
Aberration Theory
Sign in / Sign up

Export Citation Format

Share Document