A modular design for the MOSAIC AO real-time control system

被引:0
|
作者
Basden, Alastair G. [1 ]
Jenkins, David [1 ]
Morris, Tim [1 ]
Osborn, James [1 ]
Townso, Matthew [1 ]
Younger, Edward [1 ]
机构
[1] Univ Durham, Ctr Adv Instrumentat, Dept Phys, South Rd, Durham DH1 3LE, England
来源
SOFTWARE AND CYBERINFRASTRUCTURE FOR ASTRONOMY V | 2018年 / 10707卷
基金
英国科学技术设施理事会; 欧盟地平线“2020”;
关键词
MOSAIC; ELT; adaptive optics; real-time control;
D O I
10.1117/12.2313193
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The proposed MOSAIC first-generation instrument for the ELT is a multi-object spectrograph utilising a combined MOAO and GLAO system. With 8 separate wavefront sensors (4 LGS and 4 NGS), and 10 separate deformable mirrors, in addition to the ELI' M4 mirror, MOSAIC represents one of the most challenging ELT instruments for real-time control, using a total of approximately 65,000 slope measurements to control approximately 26,000 actuators with a 250 Hz LGS frame rate. The proposed modular design of real-time control system to be used with MOSAIC is presented. This is based on the Durham AO Real-time Controller (DARC), and uses 12x Intel Xeon Phi nodes (6U rack space, approx 2.5 kW under load) to obtain the required performance. We describe the prototyping activities performed at Durham, including estimates of AO system latency and jitter. The design challenges are presented, along with the techniques used to overcome these. The full modular architecture is described, including the system interfaces, control and configuration middleware, telemetry subsystem, and the hard real-time core pipeline. One benefit of our design is the ability to simultaneously test different AO control algorithms, which represents a significant opportunity for automatic optimisation of AO system performance. We discuss this concept, and present an artificial neural network solution for machine learning, which can be used to automatically improve MOSAIC performance with time. Algorithms that can be optimised in this way are discussed, include pixel calibration and processing techniques, wavefront slope measurement routines, wavefront reconstruction techniques and associated parameters, and temporal filtering methods, including vibration control. The hardware design for the real-time control system is presented, including an overview of the network architecture, the interconnections between computational nodes, and the method by which all pixels from all 8 wavefront sensors are processed concurrently. Finally, some simulation models of the MOSAIC AO system are described, and performance estimates presented.
引用
收藏
页数:9
相关论文
共 50 条
  • [41] Design of Real-Time Temperature Monitoring and Control System for Multimodal Ablation
    Zou K.
    Zou J.
    Wang Y.
    Zhang A.
    Journal of Shanghai Jiaotong University (Science), 2022, 27 (04) : 535 - 542
  • [42] Design and Implementation of the PALM-3000 Real-Time Control System
    Truong, Tuan N.
    Bouchez, Antonin H.
    Burruss, Rick S.
    Dekany, Richard G.
    Guiwits, Stephen R.
    Roberts, Jennifer E.
    Shelton, Jean C.
    Troy, Mitchell
    ADAPTIVE OPTICS SYSTEMS III, 2012, 8447
  • [43] MESSAGE CONTROL IN A REAL-TIME SYSTEM
    MATSUDA, K
    MORIYA, E
    IKEDA, R
    IKEHAMA, H
    REVIEW OF THE ELECTRICAL COMMUNICATIONS LABORATORIES, 1978, 26 (1-2): : 24 - 32
  • [44] Real-time expert control system
    Central South Univ of Technology, Changsha, China
    Artif Intell Eng, 4 (317-322):
  • [45] A real-time expert control system
    Cai, ZX
    Wang, YN
    Cai, JF
    ARTIFICIAL INTELLIGENCE IN ENGINEERING, 1996, 10 (04): : 317 - 322
  • [46] JOB CONTROL IN A REAL-TIME SYSTEM
    OKA, T
    OHMURA, T
    OHKUBO, T
    TAKEUCHI, A
    REVIEW OF THE ELECTRICAL COMMUNICATIONS LABORATORIES, 1978, 26 (1-2): : 33 - 44
  • [47] AN EXPERT SYSTEM FOR REAL-TIME CONTROL
    WRIGHT, ML
    GREEN, MW
    FIEGL, G
    CROSS, PF
    IEEE SOFTWARE, 1986, 3 (02) : 16 - 24
  • [48] The real-time control system of NAOMI
    Goodsell, SJ
    Myers, RM
    Clark, P
    Buscher, D
    ADVANCED SOFTWARE, CONTROL, AND COMMUNICATION SYSTEMS FOR ASTRONOMY, 2004, 5496 : 618 - 628
  • [49] MULTIPROCESSOR CONTROL OF A REAL-TIME SYSTEM
    KAWADA, K
    ITOH, Y
    MORIMOTO, T
    OHMINAMI, M
    REVIEW OF THE ELECTRICAL COMMUNICATIONS LABORATORIES, 1978, 26 (1-2): : 12 - 23
  • [50] Real-time embedded panorama mosaic system for digital camera
    Ha, Seong Jong
    Koo, Hyung Il
    Lee, Sang Hwa
    Cho, Nam Ik
    Kim, Soo Kyun
    2008 DIGEST OF TECHNICAL PAPERS INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS, 2008, : 19 - +