Dome Intro & Status.pdf

16
Dome Status J. DeVries 08/17/2015

Transcript of Dome Intro & Status.pdf

Page 1: Dome Intro & Status.pdf

Dome Status

J. DeVries

08/17/2015

Page 2: Dome Intro & Status.pdf

Introduction

• Dome Contractor Selection and Background

• Present interactions and status

– Structure

– Azimuth Mechanism (Rail, Bogies, Drives)

– Cladding, Louvered Light Baffle Vents (LLBVs)

– Light-Wind Screen

– Thermal (AC Ducts, Seals, Heat Loads)

– Electrical (Interfaces, Power Budget, Slip Ring, Cabinets)

– Mass Budget

• Action Items

• Future Work and Milestones

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Page 3: Dome Intro & Status.pdf

Dome Events To Date• Dome FDR May 2014

• RFP release August 2014

• Bid evaluations completed January 2015

• Dome Contract signed May 2015 with European Industrial Engineering (EIE), Mestre IT

• Kick Off Meeting in Mestre, May 2015

• Bi-weekly telecoms ongoing since May 2015

• EIE visit to LSST Offices in Tucson August 3-7 2015 for workshop

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Page 4: Dome Intro & Status.pdf

EIE Background• Dome feasibility studies (E-ELT)

• Dome design, manufacture, pre-assembly, packing & transport, erection on-site, acceptance testing (NTT, VLT, LBT, VST, VISTA)

4

NTT

VLT

LBT

VST

VISTAE-ELT

Page 5: Dome Intro & Status.pdf

Structure

5

• Dome FEM (ANSYS) has been developed by EIE Team• Models of both closed and open shutters• Fundamental frequencies > 2 Hz requirement• Additional structure proposed to more equalize

bogie loads. Max bogie load in Baseline is 860 kN.Added structure reduces the maximum bogie loads to < 600 kN. Upper Vent maintenance access with added

structure needs to be worked out Must conform to LTS-105, LTS-126

Page 6: Dome Intro & Status.pdf

Bogies

6

• With the lower bogie loads, essentially a standard bogie design that was used on VLT can be used, with a few modifications: Added lubrication holes for ease of

maintenance The wheel steel needs to be of higher yield

strength and hardness than what was used in the past to survive LSST fatigue conditions

Roller bearing selection (more investigation) Repair in place

• 600 mm dia wheels X 125 mm wide• Wheels overlap the edge of the Azimuth track to

prevent groove from developing in track• The total number of bogies can also be increased

to further reduce the load per bogie

Page 7: Dome Intro & Status.pdf

Azimuth Drives / Rail

7

• Drive stations shorter than baseline design due to smaller bogie wheels (reduces moments)

• Drive interface plates embedded in concrete pier (early deliverable to Facility Contractor)

• Selection of drives has been evaluated as suitable for LSST

• SEW EURODRIVE; Reduction gear: K127/R R87 Servo motor:

CM112H/BR/HR/TH/RH3L/KK50• Azimuth rail material and hardness

deemed appropriate for LSST• Rail interface to Pier needs to be

analyzed for tensile stress in the epoxy and concrete

Page 8: Dome Intro & Status.pdf

Cladding

8

• Contractor would like to use panels with Polyurethane foam insulation (used successfully by them on past Dome projects)

• 1 m X 12 m X 0.08 m thick panels, fully enclosed by metal and plastic exterior• Good thermal resistance, but the proposed insulation is not truly fireproof• Current requirement is for fireproof insulation• Sample of insulated panel will be sent to LSST by Contractor• LSST needs to evaluate this selection for fire safety

Page 9: Dome Intro & Status.pdf

LLBVs

9

Hinged Light Baffles Allows simpler Vent seal maintenance access from

inside Dome Currently, there are interferences in the open

position with AC Ducts and Calibration Screen Resolve with alternate hinging schemes, Duct

relocations (future work)

Page 10: Dome Intro & Status.pdf

Light-Wind Screen

10

• Dynamic modeling has been started by Contractor• Initial drive selection: SEW EURODRIVE

Reduction gear = R 107 Servo motor = CM112H

• Baseline panel mass estimate seems adequate to Contractor• Contractor would like to simplify the panel design for manufacture and look at the possibility of using

other materials (LSST Baseline is Aluminum)• Interference between lower panels and light path detected in the Contractor’s layout

This interference does not exist in the LSST Baseline, clarification on clear aperture size is needed• High duty brake / clutch for holding panels in position are being sought (used when drives are off to

reduce overall heat dissipation)

Page 11: Dome Intro & Status.pdf

Seals, Ducts and Heat Loads

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• Both labyrinth and inflatable seal for Azimuth Inflatable seal is interlocked, deflated

before Dome rotation Zero drag when deflated Good sealing when inflated (Dome parked)

• AC Duct routing may need to be altered to resolve hinged light baffle interferences (future work)

• Contractor has proposed an unaligned AC duct solution to resolve the interferences Contractor to provide more thermal

analysis regarding this LSST not optimistic that this will work

• LSST to evaluate moving / re-routing ductwork up the arch girders. Affects LTS-101

• Contractor’s calculation for Dome heat loads differs from LSST and Arcadis values Needs to be reconciled by LSST

Page 12: Dome Intro & Status.pdf

Electrical (the mechanical part)

12

• Initial Power Budget has been provided. Needs to be reviewed by Project.

• Electrical cabinets have been presented as located near the arch girders, at the Service Floor level for good maintenance access Cabinets near Rear Doors impede real estate

and visual confirmation in that area Heat dissipation a concern for (rotating) LWS

cabinet. Would like to locate this cabinet on the Main Dome Platform

Azimuth Drive cabinet locations need to be agreed upon

• Electrical schematic needs to be developed by LSST showing the expected deliverables and interface configuration between EIE and Besalco

• Slip Ring configuration also needs resolution between EIE and LSST

Page 13: Dome Intro & Status.pdf

Mass Budget

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Agrees with Baseline estimate

Page 14: Dome Intro & Status.pdf

Current Action Items List

14

Origin Action required Closure CommentsAI

N° Originator Meeting

Reference

Document

Ref. AI

N° Date Actione by Due Date Description

Action

Status Date Document

1 EIE KOM 08815-MIN010 1 27/5/2015 LSSTLSST to review and approve the Documentation list

proposed by EIEOpened

2 LSST-PO KOM 08815-MIN010 2 27/5/2015 EIE EIE to send the Documentation List Opened

3 EIE KOM 08815-MIN010 3 27/5/2015 LSSTLSST will deliver to EIE its Site Safety Plan to

integrate it into EIE’sOpened

4 LSST-PO KOM 08815-MIN010 4 27/5/2015 EIE

Safety Management Plan: The term High altitude

needs to be changed to a more proper term indicating

height-above-ground rather than geographical altitude.

Opened

5 LSST-PO KOM 08815-MIN010 5 27/5/2015 EIESafety Management Plan: EIE to update the

documentation regarding safety with “LSST/AURA”Opened

6 LSST-PO KOM 08815-MIN010 6 27/5/2015 EIERisk Management Plan: scaling the risk (cost, impact

on the schedule) a project levelOpened

7 LSST-PO KOM 08815-MIN010 7 28/5/2015 EIE PDR

EIE to perform a preliminary evaluation of MTBF value

for the PDR based on the EIE experience and

proposal. The acceptability of this value will be

discussed during PDR.

Opened

8 LSST-PO KOM 08815-MIN010 8 28/5/2015 EIEAdd in the compliance matrix the requirements of the

Applicable DocumentsOpened

9 EIE KOM 08815-MIN010 9 28/5/2015 LSSTProvide New document LTS-158 Interface Control

Document)Opened

10 LSST-PO KOM 08815-MIN010 10 28/5/2015 EIE

EIE will provide a list of variable that the DCS will

publish for the TCS with the sample period. This list

will be agreed with LSST

Opened

11 LSST-PO KOM 08815-MIN010 11 28/5/2015 EIEEIE will provide a proposal for the local control station

(laptop, tablet).Opened

12 LSST-PO KOM 08815-MIN010 12 28/5/2015 EIEEIE to look at booster fan inside ducts (2 fans per

duct)

Proposed for

Closure22/6/2015 E-mail form S. De Lorenzi

13 EIE KOM 08815-MIN010 13 28/5/2015 LSSTLSST will provide the information on the booster fans

that were already selected by LSST

Proposed for

Closure9/6/2015

e-mail form J.DeVries;

Fantech Duct Fans 09 June

2015 07:00

14 EIE KOM 08815-MIN010 14 28/5/2015 LSST

Discussion about relative motion between Dome and

platform lift. See presentations. LSST-PO will send the

information

Opened

15 LSST-PO KOM 08815-MIN010 15 28/5/2015 EIE

EIE should propose the extended the Embedded

Beam (with bolts) to hold the inflatable seal (if

implemented) and LPS slip ring, includes the

information concerning the concrete pass throughs for

inflatable seal air supply.

Opened

16 EIE KOM 08815-MIN010 16 28/5/2015 LSST

Solution: Exterior surface finishing with corrugate mill

aluminum. LSST will evaluate the proposed solution for

approval.

Opened

17 LSST-PO KOM 08815-MIN010 17 28/5/2015 EIEEIE provide the table describing the definition of the

different fireproof classes for the insulationOpened

18 EIE KOM 08815-MIN010 18 28/5/2015 LSSTEIE proposes class B fireproof panel in polyurethane,

LSST will verify with their safety if it is acceptableOpened

19 LSST-PO KOM 08815-MIN010 19 28/5/2015 EIEPrepare the electrical power budget for the rotating

part and fixed part.Opened

20 LSST-PO KOM 08815-MIN010 20 28/5/2015 EIE

EIE to provide impact in terms of

costs/efficiency/safety, etc., to LSST of not having

distributed neutral.

Opened

21 LSST-PO KOM 08815-MIN010 28/5/2015 EIE

EIE will try to change during the next design activities

the layout of the windbracing (i.e. “K” bracing instead

of “X”-bracing) in the first span of the dome, in order to

allow the extraction of the baffles.

Closed19/06/2015

22/06/2015

Bi-weekly meeting #2

E-mail form S. De Lorenzi

LSST-PO informed EIE do not pursue different

design of structural windbracing and adopt the

baseline X bracing because access and

maintenance on Louvers / Ligh baffle assembly

in a safe manner will be in charge of LSST-PO

22 LSST-PO Bi-weekly #02 19/6/2015 EIE

EIE to send LSST diagram examples of vents seals

that they have designed in the past. LSST would also

like pictures or diagrams of bogies that they have

designed in the past

Proposed for

Closure22/6/2015 E-mail form S. De Lorenzi

23 EIE Bi-weekly #02 19/6/2015 LSST-PONeed to conjure up an agenda for Aug 3rd meeting in

Tucson. Talk with Bill Gressler.

Proposed for

Closure13/7/2015 E-mail form J. Barr

24 LSST-PO Bi-weekly #02 19/6/2015 EIE

EIE will send LSST contact information for their past

bogie customers that LSST can use to verify

performance on bogies that EIE has supplied in the

past

Opened

25 LSST-PO Bi-weekly #03 2/7/2015 EIE

EIE will send contact info (from VLT) for record of their

past bogie designs. They will also send pictures of

their previous bogie designs. They will send all this info

next week (week of July 6).

Opened

26 LSST-PO Bi-weekly #03 2/7/2015 EIE

Jeff and EIE will review the Vent seal access

procedure and safety document (authored by C.

Gessner, D. Neill and J. DeVries) and provide their

own analysis of accessing and replacing the Vent

seals.

Proposed for

Closure9/7/2015 E-mail form S. De Lorenzi

27 LSST-PO Bi-weekly #03 2/7/2015 EIE

EIE to send more detail on vents and mechanism. It is

unclear why the Vents have to move out radially when

the light baffles are located outside the cross bracing.

The baseline CAD model does not agree with this

need (Joe).

Proposed for

Closure3/7/2015 E-mail form S. De Lorenzi

28 LSST-PO Bi-weekly #03 2/7/2015 EIEEIE will send technical info on the Dome skin panels

and insulation (Joe).Opened

29 LSST-PO Bi-weekly #03 2/7/2015 LSST_PO

Joe will model the electrical cabinets and play with

locations for these inside the 3D CAD model of the

Dome

Opened

LSST Project

Dome (Rotating enclosure) System

Reference: 2015-06-09_LSST-AILIssue: 1Date: June 09, 2015Title: LSST Dome Action Item List

Origin Action required Closure CommentsAI

N° Originator Meeting

Reference

Document Ref. AI N° Date Action by Due Date Description

Action

Status Date Document

1 J. DeVries 5-Aug-15 LSST (Joe) 14-Aug

Proposed Dome structural change to equalize

the bogie loads needs to be looked at for

reasonable access and maintanance.

Opened

2 J. DeVries 5-Aug-15 EIE 14-AugEIE to forward their calculation for the Dome

heat loads.Opened

E-mail sent to Cristina

on 8/11/15 requesting

this information

3 J. Barr 5-Aug-15LSST (Joe,

Jeff)28-Aug

Determine whether the fixed Service Platform

size needs to be reduced due to reduced size of

allowable rotating volume on the Platform.

Safety issue, separate meeting. Find out the gap

of the hinging baffles from EIE.

Opened

4 J. DeVries 5-Aug-15

LSST

(Chuck

Gessner)

28-Aug

The fire safety of the Dome skin panels is still in

question. Chuck Gessner will approve or

disapprove. Requirements on fireproof have to

be clarified by LSST.

Opened

5 J. DeVries 5-Aug-15 EIE 28-Aug

EIE look at LSST suggested light baffle hinge

configurations to resolve interferences with

ducts, man-lift and Calibration Screen.

Opened

6 EIE 5-Aug-15 LSST (Joe) 28-Aug

Look at aligning ducts with arch girders to move

the ducts out of the way of the hinged light

baffles.

Opened

7 EIE (Cristina) 5-Aug-15

LSST

(Doug,

Ed)

28-Aug

Discrepancy in heat load for the Dome. Arcadis

and LSST values agree. EIE values do not agree

with LSST / Arcadis. Needs review.

Opened

8 J. DeVries 5-Aug-15 LSST (Joe) 28-AugInvestigate the possible LWS interference with

the aperture at 70 deg. Zenith.Opened

9 5-Aug-15 EIE 28-AugNeed size information for the cabinets on the

fixed Dome floor.Opened

10 J. DeVries 5-Aug-15 EIE 4-Sep

The contact stresses on the current bogie wheel

design are too high for the duty cycle of the

LSST. The rail material is fine. The wheels should

be made from higher strength / higher hardness

material. A steel with yield strength between

430 and 550 MPa and compatible hardness to

the rail should be chosen.

Opened

11 J. DeVries 5-Aug-15 EIE 4-SepA sample of the cladding panels will be obtained

from EIE.Opened

12 J. DeVries 5-Aug-15 EIE 10-Sep

Azimuth rail interface to epoxy grout / concrete

analysis needs to be performed. Azimuth track

plate is an early deliverable and the design of

this plate is affected by the Azimuth track

design.

Opened

13 J. DeVries 5-Aug-15 EIE 11-SepNeed information on the Azimuth Drive cabinet

size & locations.Opened

14 J. Barr 5-Aug-15 EIE 18-Sep

Inbedded plates in Pier for mounting the azimuth

drives are proposed. Plate design needs to be

analyzed and detailed by PDR as an early

deliverable to Besalco.

Opened

15 J. DeVries 5-Aug-15 EIE 18-Sep

LWS braking needs to be resolved. High heat and

safety are an issue. Positive toothed coupling

may be needed. Need to find out duty cycle of

typical brake. Does the brake hold the full loads?

What is the heat dissipation of the brakes?

Opened

16 J. Barr 5-Aug-15

LSST

(Doug,

Oliver)

18-Sep EIE Dome power budget needs to be reviewed. Opened

17 J. Barr 5-Aug-15

LSST (Joe,

Doug,

Oliver)

18-SepClarify main switches / cabinet locations for the

Dome.Opened

18 J. Barr 5-Aug-15 EIE 18-Sep

EIE to suggest locations of electrical points of

connection to the Dome to LSST. This

information will be communcated to Arcadis by

LSST.

Opened

19 J. DeVries 5-Aug-15

LSST (Joe,

Doug,

Oliver)

18-SepLocation of Azimuth Drive cabinets needs to be

looked at and agreed upon.Opened

20 J. DeVries 5-Aug-15LSST

(Oliver)18-Sep

A drawing showing the different electrical

interfaces to the Dome must be done to

eliminate confusion between groups.

Opened

21 EIE (Gianpietro) 5-Aug-15 LSST (Joe) 18-Sep

Define orientation of slip ring trolley pattern to

define the position of the electrical conduit,

power reel and power receptacle.

Opened

22 J. DeVries 5-Aug-15 EIE PDR

Analysis for temperature of Azimuth motors

needed to see if external temperatures are

adequate for observing and survival of the

motors. Part of the design process.

Opened

23 J. Sebag 5-Aug-15 EIE PDRLSST wants to see the expected velocity profiles

for the azimuth drives.Opened

24 J. Barr 5-Aug-15 LSST (Joe) PDRLTS-101, LTS-105 and LTS-167 need updating to

allow for the hinged light baffles.Opened

25 J. DeVries 5-Aug-15 EIE PDR

Type of Slip Ring needs to be agreed upon. The

LSST preffered slip ring is not in our

specification. EIE believes their solution is safer.

EIE will send the design report for the slip ring.

Opened

26 EIE (Gianpietro) 5-Aug-15 EIE TBDEIE to do more thermal analysis to prove out

their unaligned duct solution.Opened

LSST Project

Dome (Rotating enclosure) System

Reference: XXXXXX

Issue: 1

Date: August 7, 2015

Title: LSST Dome Action Item List

• Full list(s) as of today are shown

• Needs status column update by Contractor

From KOM From Aug. Workshop

Page 15: Dome Intro & Status.pdf

Past / Current Dialogue (Weekly / Bi-weekly Telecoms, August Workshop, Skype, e-mails)

• Lower Enclosure Interface including Azimuth rail and drives, bogies & loads, AC ducts

• Main structure, vent and light baffle designs, Azimuth seal, Light-Wind Screen, cladding

• Software / Controls – LTS-158 TCS to Dome ICD, LTS -306 TCS Communication Protocol, LTS-307 TCS Software Component Interface, Software Abstraction Layer (SAL) and Software Development Kit (SDK)

• Complete interaction captured on Confluence “Rotating Enclosure (Dome)” https://confluence.lsstcorp.org/pages/viewpage.action?pageId=3113860

Current And Future Deliberation

15

Page 16: Dome Intro & Status.pdf

Future Milestones

16

EIE Plan

Checkpoint on 9/10 to verify readiness for PDR

Preliminary Design Review 10/20

• Continued weekly / bi-weekly telecoms between EIE and LSST

• Next Milestone - PDR October 2015 (tentative)