Integrated modeling of optical performance for the Terrestrial Planet Finder structurally connected interferometer

LoBosco, David; Blaurock, Carl; Chung, Soon‐Jo; Miller, David W.

doi:10.1117/12.550929

Cited by 12 publications

(9 citation statements)

References 11 publications

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“…As a result, not only the amplitude-frequency curve but also the integrated optomechanical analysis is required to evaluate the isolation effect of the VIS. Miller et al [26] proposed a comprehensive framework for integrated modeling known as the disturbances optics controls structures, which was used in the Terrestrial Planet Finder mission [27] and the Space Interferometry Mission [28]. Some analogous research has been done, such as the integrated technology model [29] and the structural-thermal-optical [30].…”

Section: Introductionmentioning

confidence: 98%

Design of a Vibration Isolation System for the Space Telescope

Yang

et al. 2015

Journal of Guidance, Control, and Dynamics

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Section: Introductionmentioning

confidence: 98%

Design of a Vibration Isolation System for the Space Telescope

Yang

et al. 2015

Journal of Guidance, Control, and Dynamics

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“…These tools have been used in various missions that include Space Interferometry Mission (SIM) [7], Next Generation Space Telescope (NGST) [8], Thirty Meter Telescope (TMT) [9] and Very Large Telescope Interferometer (VLTI) [10], Terrestrial Planet Finder (TPF) [11] and so on. In this paper, development of an integrated analysis framework has been introduced and it includes the on-board disturbance, structure and optical system model.…”

Section: Introductionmentioning

confidence: 99%

Development of Integrated Simulation Tool for Jitter Analysis

Lee¹,

Yoon²,

Han³

2012

International Journal of Aeronautical and Space Sciences

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Pointing stability of high precision observation satellites must satisfy the stringent requirements to perform at a designed level. As even a small vibrational disturbance can result in severe degradation of the optical performance, the effects of inorbit vibrational environment on the performance of optical payload must be predicted and analyzed in the design phase in order to ensure that the requirements imposed on the payload are fully met. In this paper, an integrated framework for the evaluation of the performance of optical payloads is developed. The developed simulation tool comprises of the reaction wheel induced disturbance model, state space model of a structure in modal form and Cassegrain reflector model. The performance degradation of the optical system due to jitter is expressed by using modulation transfer function (MTF) and image simulation. Moreover, vibration isolator model is also added to show the effectiveness of using a vibration isolator for the elimination of the effects of jitter in the acquisition of an image.

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“…Building several "high," "low," and "mid" fidelity simulation models for each candidate design is impractical, therefore the structural simulation models created in the CDP are often low fidelity "stick" structural models based on a few chosen architectures. Some examples are the TPF-I stick model [50] and the SIM stick model [37], both used during conceptual design to explore design trades. The design decisions made in the CDP greatly impact mission life cycle cost (LCC) and performance.…”

Section: Role Of Modeling and Analysismentioning

confidence: 99%

Spatial Nyquist fidelity method for structural models of opto-mechanical systems

2008

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As technology employed in complex multidisciplinary systems such as high performance telescope systems becomes ever more sophisticated, simulation is becoming more important during the initial design phases. The method of building these simulation models is often based on engineering experience with older, potentially dissimilar systems. A method is needed to measure the fidelity of simulation models so early design decisions are made based on appropriate modeling techniques.Previously, fidelity was a qualitative concept used to indicate a model's validity or accuracy. Here it is defined as the ability of a model to accurately predict chosen output figures of merit. In this thesis, a quantitative measure of fidelity, termed the Nyquist fidelity metric, is defined for commonly used structural model components. It expresses the ability of a finite element model to accurately predict structural eigenvalues based on the mesh size required by the spatial Nyquist criterion. The Nyquist fidelity method is developed which uses the fidelity metric to both assess the fidelity of existing complex models and to synthesize new multi-component models starting from architectural considerations such as geometric and material properties of the system. This method also estimates the error bound on the output figures of merit based on the fidelity levels and sensitivity analysis.The Nyquist fidelity method is applied to simple sample problems to first demonstrate the methodology and it is then applied to complex telescope models to show the accuracy and computational benefits of this method compared to current methods such as model reduction. The three high performance telescope case studies are the Modular Optical Space Telescope (MOST), the Thirty Meter Telescope, and the Stratospheric Observatory for Infrared Astronomy. It is shown in the MOST example that the Nyquist fidelity method provides a 40% improvement in computational time while assuring less than 5% modal frequency error, and less than 2.2% error in the output figure of merit.

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Integrated modeling of optical performance for the Terrestrial Planet Finder structurally connected interferometer

Cited by 12 publications

References 11 publications

Design of a Vibration Isolation System for the Space Telescope

Design of a Vibration Isolation System for the Space Telescope

Development of Integrated Simulation Tool for Jitter Analysis

Spatial Nyquist fidelity method for structural models of opto-mechanical systems

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