Integrated modeling methodology for core and I/O power delivery

2002 ◽  
Author(s):  
K. Radhakrishnan ◽  
Y.-L. Li ◽  
W.P. Pinello
Keyword(s):  
Integrated Modeling ◽  
Power Delivery ◽  
Modeling Methodology

Preliminary Optical Performance Analysis of the Space Interferometer Mission Using an Integrated Modeling Methodology

2000 ◽  
Author(s):  
Ipek Basdogan ◽  
Robert Grogan ◽  
Andy Kissil ◽  
Norbert Sigrist ◽  
Lisa Sievers
Keyword(s):  
System Design ◽  
System Modeling ◽  
Experimental Studies ◽  
Integrated Modeling ◽  
Optical Performance ◽  
Reaction Wheel ◽  
Space Interferometer ◽  
Modeling Methodology ◽  
Reference Design ◽  
The Impact

Abstract The Space Interferometer Mission (SIM) scheduled for launch in 2008, is one of the premiere missions in the Origins Program, NASA’s endeavor to understand the origins of the galaxies, of planetary systems around distant stars, and perhaps the origins of life itself. The precise tolerance required by the SIM instrument facilitates the investigation of many design options, trades, and methods for minimizing interaction between the actively controlled optics and the structure. One of the activities that addresses these technological challenges is the integrated modeling methodology development and validation at Jet Propulsion Laboratory (JPL). The methodology integrates structural, optical, and control system modeling into a common computational environment and enables end-to-end performance evaluation of complex optomechanical systems. This paper provides an overview of the integrated modeling methodology and introduces the most recent SIM Reference Design model. The SIM integrated model is used in system requirement trade studies and performance analyses to support the overall system design and ongoing error budget efforts. Optical performance in interferometry is typically measured in terms of optical pathlength difference (OPD) and differential wavefront tilt (DWT). This paper focuses on the OPD performance metric and investigates the OPD jitter resulting from reaction wheel assembly (RWA) disturbances. The RWA is the largest anticipated disturbance source on the spacecraft. Therefore, assessing the impact of the wheel disturbance frequency content and magnitude levels on the optical performance is essential for the success of the mission. Broadband and discrete frequency models of a reaction wheel are used to perform the disturbance analysis. The overall system design can benefit from such analysis results by identifying the critical regions in the frequency domain and decoupling the dynamics of the optical and structural components from the disturbance spectrum and the control bandwidth. The preliminary performance results show that the current SIM Reference Design meets the mission requirements with respect to RWA induced disturbances. However, some of the modeling assumptions and component models must be validated by experimental studies before the subsystem requirements are finalized.

Core Excitation Modeling Methodology for Efficient Power Delivery Analysis

2008 ◽  
Author(s):  
Fern Nee Tan ◽  
Sze Geat Pang ◽  
Dhinesh Sasidaran ◽  
Chee Siong Lee ◽  
Jin Sean Lim ◽  
...  
Keyword(s):  
Power Delivery ◽  
Core Excitation ◽  
Modeling Methodology ◽  
Efficient Power

SRAM Core Modeling Methodology for Efficient Power Delivery Analysis

2009 ◽  
Author(s):  
Fern Nee Tan ◽  
Sze Geat Pang ◽  
Chin Leng Ng ◽  
Kam Yee Wong ◽  
Lee Kee Yong
Keyword(s):  
Power Delivery ◽  
Modeling Methodology ◽  
Efficient Power

Extreme Power Considerations for High Performance Computing

2014 ◽  
Vol 2014 (1) ◽  
pp. 000769-000775
Author(s):  
How Lin
Keyword(s):  
Power Loss ◽  
High Performance ◽  
Dynamic Test ◽  
Path Loss ◽  
Power Delivery ◽  
Thermal Dynamics ◽  
Modeling Methodology ◽  
Power Delivery Network ◽  
Higher Power ◽  
Loss Efficiency

Power demand in the high end computing and data server segments are driving higher power delivery requirements at all packaging levels in a typical system. At the compute device level, compute node cards are now requiring core power supplies with current levels well above 100 amps at 1 volt or less. This imposes severe power delivery challenges in both power supply power conversion efficiency improvement and power delivery path loss minimization. Due to substantial aggregate I2R losses introduced by the current carrying structures in the power delivery paths, depending on the current level used, up to 10% and more of power loss could result. The focus of this paper is in the discussion of novel interconnect structures developed for reduction of current delivery path power loss. i3Electronics Research & Development addresses these extremes with packaging constructs capable of efficient handling in excess of 200 amps at the device level. Through the course of this study, methods were developed for thermal and electrical modeling, dynamic test apparatus and testing. Several test vehicles were built based on concepts with promising modeled results. Power loss / efficiency, thermal dynamics and electrical dynamics were measured using these test vehicles. The measured and modeled results were compared and studied to assess the accuracy of the power delivery network modeling methodology. This paper will present the methods and constructs developed along with the models and test results.

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