1. Manuals
  2. Brands
  3. ROCKET LAB Manuals
  4. Lighting Equipment
  5. PSC MOTORIZED Lightband MKII
  6. Operating procedure

ROCKET LAB PSC MOTORIZED Lightband MKII Operating Procedure

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
MOTORIZED
Lightband MKII
Operating Procedure
spacesystems@rocketlabusa.com
rocketlabusa.com
Copyright PSC
|
2000781K
2000781K MkII MLB Operating Procedure
Page 1 of 68

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PSC MOTORIZED Lightband MKII and is the answer not in the manual?

Questions and answers

Summary of Contents for ROCKET LAB PSC MOTORIZED Lightband MKII

  • Page 1 MOTORIZED Lightband MKII Operating Procedure 2000781K spacesystems@rocketlabusa.com rocketlabusa.com Copyright PSC 2000781K MkII MLB Operating Procedure Page 1 of 68...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS REVISION HISTORY ........................... 3 ACRONYMS AND ABBREVIATIONS ......................4 INTRODUCTION ............................5 WARNINGS ............................... 11 ANOMALY REPORTING ........................... 11 HANDLING PRECAUTIONS ........................12 LIGHTBAND MECHANICAL ATTACHMENT................... 15 MATING THE LIGHTBAND........................19 STOWING THE LIGHTBAND........................24 SETTING-FOR-FLIGHT THE LIGHTBAND ..................36 DEPLOYING THE LIGHTBAND ......................

  • Page 3: Revision History

    Revision History Issued Created Reviewed Change Description 02Nov06 Initial document 11May07 Varies Varies See prior revisions for details. 17Jan19 1) Entire document: general formatting and grammatical improvements. 2) Section 1: added DB-9 description 3) Section 2.1: made this a section 4) Table 2-1: updated descriptions, added Mate operation, electrical column and section references 5) Section 2.3: added this section...

  • Page 4: Acronyms And Abbreviations

    1. Acronyms and Abbreviations • A (or Amps) – Ampere (SI unit of electric current) • AR – As required • Atm – Standard atmospheric pressure (unit of pressure) • AWG – American wire gauge • C – Celsius (unit of temperature) •...

  • Page 5: Introduction

    2. Introduction 2.1 Scope This document describes the steps required to adjoin and operate the MKII Motorized Lightband (MLB). Training and certification by Planetary Systems Corp (PSC), verified via PSC document 3000224 MLB Training Record, are required to operate any Lightband. The Training Record also specifies the certification’s expiration date. Ensure this is the latest version of the document by visiting PSC’s website, http://www.planetarysystemscorp.com.
  • Page 6 Figure 2-1: MLB15.000-24, Stowed Figure 2-2: MLB15.000-24, Deployed (also referred to as separated) Copyright PSC 2000781K MkII MLB Operating Procedure Page 6 of 68...
  • Page 7 Figure 2-3: Motor Bracket Assembly, internal view Figure 2-4: Motor Bracket Assembly, external view Copyright PSC 2000781K MkII MLB Operating Procedure Page 7 of 68...
  • Page 8 Figure 2-5: Motor Bracket Assembly components, Stowed Figure 2-6: Motor Bracket Assembly operations Copyright PSC 2000781K MkII MLB Operating Procedure Page 8 of 68...
  • Page 9 2.3 Referenced Documents The following documents are referenced throughout the procedure. Check http://www.planetarysystemscorp.com to ensure the latest revision. Table 2-2: Referenced documents Document Necessary For Adjoining structure flatness, Lightband circularity, LCT qty., detailed 2000785 MkII MLB User Manual Lightband description 3000224 MLB Training Record Verify approval to operate Lightband(s) 1001015 MLB Warranty...
  • Page 10 Table 2-4: Mating (section 7) Item Make & Model Typically Used by PSC Ability to compress Lightband (payload, weights, compression fixture, LCTs). See note 1 below. Ability to verify Lightband pre-Stow flange distance. Either Starrett 229C and Mitutoyo 500-175-30 a) Telescoping Gauge and Caliper to measure Lightband flange separation (1.3 to 2.1 inch range), or PSC 2002486 MLB Go No Go Stow b) Go-no go gauge...

  • Page 11: Warnings

    3. Warnings Violating any of the below shall void PSC document 1001015 MLB Warranty. 1. All technicians completing this procedure shall be trained directly by PSC and given authority to operate the Lightband(s) stated in PSC document 3000224 MLB Training Record. 2.

  • Page 12: Handling Precautions

    5. Handling Precautions Lower Ring 1. Do not touch the ball screw. Be especially careful when installing fasteners adjacent the Motor Bracket Assembly. See Figure 5-1. 2. Do not touch the portion of the Hinged Leaves that engage the Upper Ring. Do not wipe off the grease during cleaning.
  • Page 13 Figure 5-3: Do not allow the motors to contact the table or any other objects Figure 5-4: Do not touch the gear cover Figure 5-5: Do not touch the Separation Springs Figure 5-6: Ensure the Leaf Retaining Cord is not contacted Copyright PSC 2000781K MkII MLB Operating Procedure Page 13 of 68...
  • Page 14 Figure 5-7: Do not touch spring plungers or allow them to contact anything Figure 5-8: Do not allow Upper Ring accessories to contact anything Safely handle the Lightband by grabbing the flanges on the Lower Ring and Upper Rings as shown in Figure 5-9. Figure 5-9: Uses flanges to handle the Lightband Copyright PSC 2000781K MkII MLB Operating Procedure...

  • Page 15: Lightband Mechanical Attachment

    6. Lightband Mechanical Attachment Date & Initials Step Procedure Tech. Ensure the SN on the Upper Ring corresponds to the SN on the Lower Ring. 6.1.1 Record all Lightband info on the cover page. The assembly number and revision can be found on both the Upper and Lower Rings, typically adjacent the Motor Bracket Assembly.
  • Page 16 Date & Initials Step Procedure Tech. Will Separation Switches or Separation Connectors be attached to the 6.1.6 Lightband? If so, carefully review PSC documents 2001025 Separation Connector Data Sheet and 2002204 Separation Switch Data Sheet for unique -----N/A----- attachment requirements. Also ensure sufficient tool access will be available as adjoining structures often overhang the Lightband and restrict access.
  • Page 17 Figure 6-2: Inserting a SHC screw between Leaves on Lower Ring. Figure 6-3: SHC screw and washer inserted between Leaves on elevated Lower Ring. Figure 6-4: Separated Lightband halves attached to adjoining structures. Copyright PSC 2000781K MkII MLB Operating Procedure Page 17 of 68...
  • Page 18 Date & Initials Step Procedure Tech. Torque all fasteners on the Lower Ring. Minimum allowable torque is 70 in∙lb. 6.1.10 PSC typically torques 100 to 115 in∙lb. Higher torque is allowable for high line- loading. See note 2. Attach the Upper Ring to its adjoining structure by inserting fasteners and 6.1.11 washers through the counterbores.

  • Page 19: Mating The Lightband

    7. Mating the Lightband Date & Initials Step Procedure Tech. Verify the Upper and Lower Rings are attached to adjoining structures per 7.1.1 Section 6. Also see section 3 warning #4. Orient the Lightband such that the wiring will reach the DB-9 electrical 7.1.2 connector.
  • Page 20 Date & Initials Step Procedure Tech. This step shall only be performed if required by Step 7.1.4. This is typically only 7.1.5 necessary prior to the first mate (after unpacking the Lightband). 1. Contacting only the top surfaces, push the Sliding Tube radially outward (towards the motors).
  • Page 21 Date & Initials Step Procedure Tech. Consider how the Lightband will be compressed. The Separation Springs may 7.1.6 be distributed asymmetrically around the Lightband to induce tip-off or compensate for an offset CG. In this case using a central single compression -----N/A----- point may not be adequate.
  • Page 22 Date & Initials Step Procedure Tech. Move the Upper Ring close to the Lower Ring for alignment checks. Verify 7.1.11 alignment before any force is applied to compress the Lightband. Per Figure 7-6 ensure: 1. Cutout in Upper Ring aligns over Motor Bracket Assembly on Lower Ring. 2.
  • Page 23 Date & Initials Step Procedure Tech. If using LCTs ensure they are properly attached per section 17.2 then proceed 7.1.12 -----N/A----- to section 17.3. Compress the Lightband. This can be achieved by placing weights on the 7.1.13 Upper Ring, using the weight of the payload, compressing in a fixture, etc. The total applied force shall be within the range calculated below.

  • Page 24: Stowing The Lightband

    8. Stowing the Lightband This section will Stow the Lightband. During the Stow operation the Lightband’s internal switches experience three collective switch states. Prior to Stowing, three test circuits will be operated to verify proper power and data acquisition. Emulating each switch state reduces the probability of an anomaly. In order, the states are 1.
  • Page 25 Figure 8-1: Stow test circuit #1 Copyright PSC 2000781K MkII MLB Operating Procedure Page 25 of 68...
  • Page 26 Date & Initials Step Procedure Tech. Set the power source voltage according to Lightband size: 8.1.5 Diameter < 31.0 inch: 27 to 28 V Diameter ≥ 31.0 inch and greater: 30 to 31 V Set the current limit on the power source to 6.5 ± 0.1 A. 8.1.6 Set the timer relay to apply power for 1.50 ±...
  • Page 27 8.2 Stow Test Circuit #2 (Intermediate State) Date & Initials Step Procedure Tech. Set up the Test Circuit: Intermediate portion of Stow Test Circuit #2 per Figure 8.2.1 8-2 and connect to the Stow Power and Measurement Circuit. Figure 8-2: Stow test circuit #2 Copyright PSC 2000781K MkII MLB Operating Procedure Page 27 of 68...
  • Page 28 Date & Initials Step Procedure Tech. Perform the following to operate the test circuit. 1. Turn on the power source output. 2. Verify the oscilloscope trigger is active and ready to acquire data. 3. Activate the timer relay. 4. Verify the following occurred: 4.1.
  • Page 29 8.3 Stow Test Circuit #3 (Stowed State) Date & Initials Step Procedure Tech. Set up the Test Circuit: Stowed portion of Stow Test Circuit #3 per Figure 8-3 8.3.1 and connect to the Stow Power and Measurement Circuit. Figure 8-3: Stow test circuit #3 Copyright PSC 2000781K MkII MLB Operating Procedure Page 29 of 68...
  • Page 30 Date & Initials Step Procedure Tech. Perform the following to operate the test circuit. 1. Designate a person to watch the power source output display. 2. Turn on the power source output. 3. Verify the oscilloscope trigger is active and ready to acquire data. 4.
  • Page 31 8.4 Stow Date & Initials Step Procedure Tech. Verify the DB-9 pin connector of the Stow Power and Measurement Circuit in Figure 8-4 is visibly clean. Any debris could detrimentally contaminate the 8.4.1 Lightband’s mating socket connector. Connect the Lightband to the Stow Power and Measurement Circuit per Figure 8.4.2 8-4.
  • Page 32 Date & Initials Step Procedure Tech. Prior to Stowing, verify the Lightband is in the allowable temperature range per 8.4.3 section 3, note 10. Re-verify pre-Stow flange distance still complies with step 7.1.14. If it does not, repeat step 7.1.14 (or step 17.3.5 if using LCTs). This ensures weights did not 8.4.4 shift or LCTs did not creep as there is often significant time between the previous measurement and this step.
  • Page 33 Figure 8-5: Example Stow voltage and current profiles at NTP Copyright PSC 2000781K MkII MLB Operating Procedure Page 33 of 68...
  • Page 34 Table 8-1: Stow electrical verification (values apply at NTP) Stow Electrical Parameters Allowable Measured Motor Motor MLB Size Item Description (1) Units First peak current A/mtr 8.000-12 Second peak current A/mtr Motors powered duration First peak current A/mtr 11.732-18 Second peak current A/mtr Motors powered duration First peak current...
  • Page 35 Date & Initials Step Procedure Tech. Disconnect the Stow Power and Measurement Circuit in Figure 8-4 from the 8.4.11 Lightband’s DB-9 connector. Measure resistance directly at the Lightband's DB-9 socket connector and complete Table 8-2. Contact PSC if a discrepancy is found. PSC recommends using a DMM.

  • Page 36: Setting-For-Flight The Lightband

    9. Setting-For-Flight the Lightband This section will Set-For-Flight (SFF) the Lightband. During the SFF operation the Lightband’s internal switches experience two collective switch states. Prior to Setting-For-Flight, two test circuits will be operated to verify proper power and data acquisition. Emulating each switch state reduces the probability of an anomaly. In order, the states are 1.
  • Page 37 Figure 9-1: SFF test circuit #1 Copyright PSC 2000781K MkII MLB Operating Procedure Page 37 of 68...
  • Page 38 Date & Initials Step Procedure Tech. Set the power source voltage at 15 to 16 V 9.1.5 Set the current limit on the power source to 3.5 ± 0.1 A. 9.1.6 Set the timer relay to apply power for 1.40 ± 0.05 s. 9.1.7 If using the recommended timer, set its function to ‘D: One Shot’.
  • Page 39 9.2 SFF Test Circuit #2 (Intermediate State) Date & Initials Step Procedure Tech. Set up the Test Circuit: Intermediate portion of SFF Test Circuit #2 per Figure 9.2.1 9-2 and connect to the SFF Power and Measurement Circuit. Figure 9-2: SFF test circuit #2 Copyright PSC 2000781K MkII MLB Operating Procedure Page 39 of 68...
  • Page 40 Date & Initials Step Procedure Tech. Perform the following to operate the test circuit. 1. Designate a person to watch the power source output display. 2. Turn on the power source output. 3. Verify the oscilloscope trigger is active and ready to acquire data. 4.
  • Page 41 9.3 Set-For-Flight Date & Initials Step Procedure Tech. Verify the DB-9 pin connector of the SFF Power and Measurement Circuit in Figure 9-3 is visibly clean. Any debris could detrimentally contaminate the 9.3.1 Lightband’s mating socket connector. Connect the Lightband to the SFF Power and Measurement Circuit per Figure 9.3.2 9-3.
  • Page 42 Date & Initials Step Procedure Tech. PSC recommends recording video and audio of the Set-For-Flight operation. This is not required but has proven very helpful in determining root cause in the -----N/A----- 9.3.3 unexpected event of an anomaly. To Set-For-Flight the Lightband: 1.
  • Page 43 Figure 9-4: Example Set-For-Flight voltage and current profiles at NTP Table 9-1: Set-For-Flight electrical verification (values apply only at NTP) Set-For-Flight Electrical Parameters Allowable Measured Item Description Units Motor A Motor B First peak current A/mtr 1.05 1.70 Free-running current (average) A/mtr 0.02 0.18...
  • Page 44 Date & Initials Step Procedure Tech. Disconnect the SFF Power and Measurement Circuit from the Lightband’s 9.3.9 DB-9 socket connector in Figure 9-3. Measure resistance directly at the Lightband's DB-9 socket connector and complete Table 9-2. Contact PSC if a discrepancy is found. PSC recommends using a DMM.

  • Page 45: Deploying The Lightband

    10. Deploying the Lightband This section will Deploy the Lightband. During the Deploy operation the Lightband’s internal switches experience three collective switch states. Prior to Deploying, three test circuits will be operated to verify proper power and data acquisition. Emulating each switch state reduces the probability of an anomaly. In order, the states are 1.
  • Page 46 Figure 10-1: Deploy test circuit #1 Copyright PSC 2000781K MkII MLB Operating Procedure Page 46 of 68...
  • Page 47 Date & Initials Step Procedure Tech. Set the power source voltage at 24 to 32 V . When possible use the 10.1.5 minimum voltage as this maximizes the Lightband’s operating life and verifies worst-case torque margin. Set the current limit on the power source to 6.5 ± 0.1 A. 10.1.6 Set the timer relay to apply power for 0.50 ±...
  • Page 48 10.2 Deploy Test Circuit #2 (Intermediate State) Date & Initials Step Procedure Tech. Set up the Test Circuit: Intermediate portion of Deploy Test Circuit #2 per 10.2.1 Figure 10-2 and connect to the Deploy Power and Measurement Circuit. Figure 10-2: Deploy test circuit #2 Copyright PSC 2000781K MkII MLB Operating Procedure Page 48 of 68...
  • Page 49 Date & Initials Step Procedure Tech. Perform the following to operate the test circuit. 1. Turn on the power source output. 2. Verify the oscilloscope trigger is active and ready to acquire data. 3. Activate the timer relay. 4. Verify the following occurred: 4.1.
  • Page 50 10.3 Deploy Test Circuit #3 (Deployed State) Date & Initials Step Procedure Tech. Set up the Test Circuit: Deployed portion of Deploy Test Circuit #3 per Figure 10.3.1 10-3 and connect to the Deploy Power and Measurement Circuit. Figure 10-3: Deploy test circuit #3 Copyright PSC 2000781K MkII MLB Operating Procedure Page 50 of 68...
  • Page 51 Date & Initials Step Procedure Tech. Perform the following to operate the test circuit. 1. Designate a person to watch the power source output display. 2. Turn on the power source output. 3. Verify the oscilloscope trigger is active and ready to acquire data. 4.
  • Page 52 10.4 Deploy Date & Initials Step Procedure Tech. The Upper Ring shall be constrained during Deployment. If Separating 10.4.1 (allowing the Separation Springs to fully extend) skip to step 10.4.2. If Separating is not required, a force shall be applied to restrain the Upper Ring. Apply a compressive force on the Upper Ring per the calculations below.
  • Page 53 Date & Initials Step Procedure Tech. Verify the DB-9 pin connector of the Deploy Power and Measurement Circuit in Figure 10-4 is visibly clean. Any debris could detrimentally contaminate the 10.4.3 Lightband’s mating socket connector. Connect the Lightband to the Deploy Power and Measurement Circuit per 10.4.4 Figure 10-4.
  • Page 54 Date & Initials Step Procedure Tech. PSC recommends recording video and audio of the Deploy operation. This is 10.4.5 not required but has proven very helpful in determining root cause in the -----N/A----- unexpected event of an anomaly. To Deploy the Lightband: 10.4.6 1.
  • Page 55 Figure 10-5: Example Deploy voltage and current profiles at NTP Table 10-1: Deploy electrical verification (values apply only at NTP) Deploy Electrical Parameters Allowable Measured Item Description Units Motor A Motor B First peak current A/mtr Motor powered duration (1,2) 0.04 0.10 Motor spin down duration...
  • Page 56 Date & Initials Step Procedure Tech. Disconnect the Deploy Power and Measurement Circuit from the Lightband’s 10.4.11 DB-9 socket connector. Measure resistance directly at the Lightband's DB-9 socket connector and 10.4.12 complete Table 10-2. Contact PSC if a discrepancy is found. PSC recommends using a DMM.

  • Page 57: Removing The Lightband From Adjoining Structures

    11. Removing the Lightband from Adjoining Structures Date & Initials 11.1.1 Step Procedure Tech. Removing the Lower Ring of an MLB 15.000-24 only. All other sizes shall skip 11.1.1 this step. Also skip this step if using reduced head fasteners per section 14. Remove the Lower Ring by reversing step 6.1.9.

  • Page 58: Horizontal Integration (Optional)

    12. Horizontal Integration (Optional) Horizontal integration may be necessary due to space vehicle (SV) and/or launch vehicle (LV) limitations. This section describes the steps and precautions necessary to ensure proper Stowing of the Lightband. Date & Initials Step Procedure Tech. Is an isolation system attached to the Lower Ring? If so, it may be easier to 12.1.1 Stow the Lightband with Transition Rings, remove the Transition Rings, and...
  • Page 59 Figure 12-1: Verify Lower Ring is leveled prior to mating SV. Figure 12-2: Be cognizant of translational and rotational alignment and compliance. Figure 12-3: Verify parallelism of compressed Lightband. Copyright PSC 2000781K MkII MLB Operating Procedure Page 59 of 68...

  • Page 60: Lightband Electrical Schematics

    13. Lightband Electrical Schematics Figure 13-1 shows the switch states during and after each Lightband operation. Note that Stowed and Set-For- Flight have the same final switch states. During operation, the switches temporarily change to the Intermediate State shown below. This occurs when the Sliding Tube is not contacting either the Stow or Deploy limit switches. Figure 13-1: Lightband switch states Copyright PSC 2000781K MkII MLB Operating Procedure...

  • Page 61: Recommended Support Equipment

    14. Recommended Support Equipment The following is a list of equipment PSC has developed over years of Lightband operation and training. This equipment is not required for proper Lightband operation but is very useful. PSC does not supply any of the items listed below.

  • Page 62: Setup Pictures

    15. Setup Pictures Figure 15-1: Example of equipment used to operate Lightband and record voltage and current. Figure 15-2: DMM and DB-9 breakout cable used to measure Motor Bracket Assembly resistance. Copyright PSC 2000781K MkII MLB Operating Procedure Page 62 of 68...

  • Page 63: Caution - Unintended Electrical Paths

    16. Caution - Unintended Electrical Paths By modifying the Power and Measurement Circuits, several customers have caused anomalies while operating the Lightband. They created unintended electrical paths that bypassed limit switches and/or shorted motors. This in-turn permanently damaged, or unexpectedly deployed, the Lightband. The customer shall be extremely confident in any changes to the Power and Measurement Circuits prior to operating a Lightband.

  • Page 64: Lct Procedure

    17. LCT Procedure PSC part 4000637 Lightband Compression Tool (LCT) can be used to compress the Lightband prior to Stowing. They are ideal if the satellite weighs less than the total Separation Spring compressive force or during horizontal integration. Note, an LCT consists of a single assembly. A pair of LCTs, one on the Lower Ring and one on the Upper Ring, are required at each location.
  • Page 65 17.2 LCT Installation Date & Initials Step Procedure Tech. Calculate the quantity of LCT pairs required using PSC document 2000785 17.2.1 MkII MLB User Manual. Required LCT qty. [pair] = __________ Actual LCT qty. [pair] = ____________ Attach one half of the LCT pairs to the Lightband Upper Ring flange. Only use 17.2.2 the outboard corner holes of the flange shown in Figure 17-1 and locate each LCT as close to a Separation Spring as possible.
  • Page 66 Figure 17-3: Visually aligned LCT pair 17.3 Mating the Lightband Date & Initials Step Procedure Tech. Upper and Lower Rings shall be aligned per Step 7.1.11. 17.3.1 Prepare cable tie tool 17.3.2 1. Disable cut-off feature (if present). 2. Ensure force setting does not exceed cable tie break strength. If using referenced tool, set to ‘8’.
  • Page 67 17.4 Flange Gap Measurements Table 17-1: Flange Measurements Distance Between Upper and Lower Ring Flanges [in] Meas. LCT 1 LCT 2 LCT 3 LCT 4 LCT 5 LCT 6 LCT 7 LCT 8 LCT 9 LCT 10 LCT 11 LCT 12 Copyright PSC 2000781K MkII MLB Operating Procedure Page 67 of 68...
  • Page 68 17.5 LCT Removal Date & Initials Step Procedure Tech. Remove all cable ties by either sliding them off the LCT bearings or cutting 17.5.1 them. Take inventory to ensure all were removed. Also inspect the Lightband near each LCT to ensure no small cable tie pieces broke off. Optional Step: 17.5.2 If desired, the LCTs may be removed from the Lightband.

Table of Contents