ROCKET LAB PSC MOTORIZED Lightband MKII, Руководство по эксплуатации

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Copyright PSC 2000781K MkII MLB Operating Procedure Page 45 of 68
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. Stowed (full voltage and current draw for entire duration)
2. Intermediate (full voltage and current draw for entire duration)
3. Deployed (no voltage or current draw as this state emulates the Deploy switches cut power)
10.1 Deploy Test Circuit #1 (Stowed State)
Step Procedure
Date & Initials
Tech. QA
10.1.1
Oscilloscope shall record voltage and current per the following requirements:
1.
Sample rate: ≥ 1,000 Hz
2.
Voltage resolution: ≤ 0.2 V
3.
Current resolution: ≤ 0.02 A
-----N/A-----
10.1.2
Set up the Deploy Power and Measurement Circuit portion of Deploy Test
Circuit #1 per Figure 10-1.
10.1.3
May skip this step if no components/wiring were added since Set-For-Flight.
Excessively long harnesses and/or thin wires have significant resistance which
will reduce the voltage at the motors. Verify the resistance between the power
source and Lightband connector is acceptable. This applies to the complete
loop (power and return). PSC recommends the following method
1. Ensure power source output is off.
2. Set the timer relay function to
‘D: One Shot’
and 5 s duration.
3. Set a DMM to measure resistance and connect it across the power
source.
4. Jumper pin 1 to pin 4 on a DB-9 socket connector and connect to the
Deploy Power and Measurement Circuit .
5. Activate the timer relay and read the DMM resistance measurement. It
shall be < 1.0
Ω. This verifies the Motor A portion of the circuit.
6. Remove the pin 1 to pin 4 jumper and connect pin 5 to pin 8.
7. Activate the timer relay and read the DMM resistance measurement. It
shall be < 1.0
Ω. This verifies the Motor B portion of the circuit.
8. Remove the jumper connector and DMM.
10.1.4
Set up the Test Circuit: Stowed portion of Deploy Test Circuit #1 per Figure
10-1 and connect to the Deploy Power and Measurement Circuit .