1

Full Mission Testing:Third Teleconference

West Virginia University Rocketeers Student team: N. Barnett, R. Baylor, L. Bowman, M. Gramlich, C. Griffith,

S. Majstorovic, D. Parks, B. Pitzer, K. Tewey, E. Wolfe

Faculty advisors: Y. Gu, D.J. Pisano, D. Vassiliadis

May 27, 2010

2

Summary of Changes

Since Last Report

- Radio board- PCB v. 1 integration started

- Transmitter tests

- Receiver filter: decision for RLC

- PCB v. 2 ordered (to be delivered 6/2)

- Main board- Sensor calibration: ongoing

- Independent testing scheduled

- Interfacing with canister partners- Solidworks designs to be sent to Temple

3

Radio board

Integration on PCBs:

Transmitter

Receiver

4

Radio Board: Transmitter

• Now implemented on PCB• Undergoing tests

5

Radio Board: Receiver

• LC filter chosen• Integration started

6

Programmable Elements

• The ColdFire PIT is used to control the digital capacitor.

• Currently we can control simultaneously multiple capacitors: useful in extending range or resolution of effective transmission frequency.

7

Radio PCB: Outlook

• v. 2: Transmitter and receiver now consolidated on single board.

• Ordered 5/27, expected 6/2.

8

Main Board

• Sensor calibration: ongoing.

• Data storage: transition to binary files, more efficient storage.

9

Independent Testing

• Tests scheduled at ATK for Thursday, June 3.

• Tests planned:1. Functional: students perform a demo of control and

data acquisition software2. Solder inspection/connectivity of circuit cards: by

JSTD-certified engineer3. Thermal/vacuum: -20º to +85º C4. Vibration:

• Low amplitude sine sweep: 10-144 Hz• Random: 0.051 g2/Hz, 20-2000 Hz

10

Vibration Testing

• ATK will build a basic fixture to mount payload plate• We will provide them with the payload and canister

11

Integration with Canister Partners

• Solidworks files sent to Temple team

• Calculation of mass properties

12

Overall Analysis

Launch readiness: we are still working on several issues related to the radio reception and control. We focus on two areas:

1. Circuit integration on PCB.

2. Antenna transmission/reception tests indicate inductive (magnetic) rather than RF coupling. This is probably due to a mismatch in the circuit impedances.

Otherwise we have been integrating the radio board!

13

Conclusions

Issues and concerns:– Transmission/reception tests are continuing.

Summary/Closing remarks:- The main board will be taken to independent testing

on June 3. - There is additional work to be done on several radio

board components.