Keyword: factory
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MOD3I01 Bayesian Reliability Model for Beam Permit System of RHIC at BNL hardware, framework, collider, operation 1
 
  • P. Chitnis
    Stony Brook University, Stony Brook, New York, USA
  • K.A. Brown
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
Bayesian Analysis provides a statistical framework for updating prior knowledge as observational evidence is acquired. It can handle complex and realistic models with flexibility. The Beam Permit System (BPS) of RHIC plays a key role in safeguarding against the faults occurring in the collider, hence directly impacts RHIC availability. Earlier a multistate reliability model* was developed to study the failure characteristics of the BPS that incorporated manufacturer and military handbook data. Over the course of its 15 years of operation, RHIC has brought forth operational failure data. This work aims towards the integration of earlier reliability calculations with operational failure data using Bayesian analysis. This paper discusses the Bayesian inference of the BPS reliability using a two-parameter Weibull survival model, with unknown scale and shape parameters. As the joint posterior distribution for Weibull with both parameters unknown is analytically intractable, the Markov Chain Monte Carlo methodology with Metropolis-Hastings algorithm is used to obtain the inference. Selection criteria for the Weibull distribution, prior density and hyperparameters are also discussed.
*P. Chitnis et al., 'A Monte Carlo Simulation Approach to the Reliability Modeling of the Beam Permit System of Relativistic Heavy Ion Collider (RHIC) at BNL', Proc. of ICALEPCS'13, San Francisco, CA.
 
slides icon Slides MOD3I01 [3.929 MB]  
 
MOPGF006 The Renovation of the CERN Controls Configuration Service controls, database, software, GUI 1
 
  • L. Burdzanowski, C. Roderick
    CERN, Geneva, Switzerland
 
  The Controls Configuration Service (CCS) is a key component in CERN's data driven accelerator Control System.  Based around a central database, the service also provides a range of client APIs and user interfaces - enabling configuration of controls for CERN's accelerator complex.  The service has existed for 35 years (29 based on Oracle DBMS). There has been substantial evolution of the CCS over time to cater for changing requirements and technology advances.  Inevitably this has led to increases in CCS complexity and an accumulation of technical debt.  These two aspects combined have a negative impact on the flexibility and maintainability of the CCS, leading to a potential bottleneck for Control System evolution.   This paper describes on-going renovation efforts (started mid-2014) to tackle the aforementioned issues, whilst ensuring overall system stability.  In particular, this paper covers architectural changes, the agile development process in place - bringing users close to the development cycle, and the deterministic approach used to treat technical debt.  Collectively these efforts are leading towards a successful renovation of a core element of the Control System.  
poster icon Poster MOPGF006 [4.508 MB]  
 
WEPGF069 Integrating Web-Based User Interface Within Cern's Industrial Control System Infrastructure controls, interface, software, network 1
 
  • A. Voitier, P. Golonka, M. Gonzalez-Berges
    CERN, Geneva, Switzerland
 
  For decades the user interfaces of industrial control systems have been primarily based on native clients. However, the current IT trend is to have everything on the web. This can indeed bring some advantages such as easy deployment of applications, extending HMIs with turnkey web technologies, and apply to supervision interfaces the interaction model used on the web. However, this also brings its share of challenges: security management, ability to spread the load and scale out to many web clients, etc… In this paper, the architecture of the system that was devised at CERN to decouple the production WINCC-OA based supervision systems from the web frontend and the associated security implications are presented together with the transition strategy from legacy panels to full web pages using a stepwise replacement of widgets (e.g. visualization widgets) by their JavaScript counterpart. This evolution results in the on-going deployment of web-based supervision interfaces proposed to the operators as an alternative for comparison purposes.  
poster icon Poster WEPGF069 [0.975 MB]