<p> Document Control Heading – DINO-ADCS-TPS-GYRO 4/6/18</p><p>DINO Trade Point Study Report</p><p>Subsystem: ADCS</p><p>Trade Study Subject: ______Rate Gyro Sensor__</p><p>Document Name: ___(DINO-ADCS-TPS-GYRO)___</p><p>Author: ______Stephen Stankevich______Date: ______8/27/2003______</p><p>1 of 5 Document Control Heading – DINO-ADCS-TPS-GYRO 4/6/18</p><p>Revision Log</p><p>Revision Description Date A First and final TPS report 8/27/2003</p><p>Signatures</p><p>Document Originator: ______Name Signature Date</p><p>Subsystem Team Lead: ______(if different than above) Name Signature Date</p><p>Systems Lead: ______Name Signature Date</p><p>2 of 5 Document Control Heading – DINO-ADCS-TPS-GYRO 4/6/18</p><p>Table of Contents (Delete this if the study is short)</p><p>1. General Description of the Trade Study...... 3 2. Options...... 3 2.1. BEI technologies Horizon Gyrochip...... 3 2.1.1. Pros...... 4 2.1.2. Cons...... 4 2.2. Analog Devices ADXRS150 angular rate sensor This is a MEMS rate gyro. It is simply an integrated circuit chip that outputs an analog signal for the rotation about its yaw axis...... 4 2.2.1. Pros...... 4 2.2.2. Cons...... 4 3. Other Unexplored Options...... 4 3.1...... 4 4. Design Decision – Analog Devices ADXRS150...... 5 4.1. Very simple to add to the s/c design since it attaches to a PCB we were already going to need..5 4.2. Very inexpensive chip allows for extra purchases and more testing...... 5</p><p>1. General Description of the Trade Study</p><p>The attitude determination system needs sensors in order to determine the attitude of the s/c. A magnetometer has already been chosen and it is desirable to add rate gyros to output the s/c rotational rate. The study compares two types of rate gyros that are feasible for our project and makes a selection</p><p>2. Options</p><p>2.1. BEI technologies Horizon Gyrochip</p><p>This is an angular rate sensor that comes in a machined package and outputs an analog signal relative to the spin rate about its axis.</p><p>3 of 5 Document Control Heading – DINO-ADCS-TPS-GYRO 4/6/18</p><p>2.1.1. Pros</p><p>1.1.1.1. Size: the gyrochip is small and lightweight with low power consumption. </p><p>1.1.1.2. Inexpensive for industry standards</p><p>1.1.1.3. Resolution of 0.004°/s.</p><p>2.1.2. Cons</p><p>1.1.1.4. While inexpensive for industry standards it still costs $1000 for a set of three sensors</p><p>2.2. Analog Devices ADXRS150 angular rate sensor This is a MEMS rate gyro. It is simply an integrated circuit chip that outputs an analog signal for the rotation about its yaw axis. </p><p>2.2.1. Pros</p><p>1.1.1.5. It is just an IC chip that mounts on a PCB. </p><p>1.1.1.6. Resolution up to .004 °/s. </p><p>1.1.1.7. Very inexpensive at $40 per chip.</p><p>2.2.2. Cons</p><p>1.1.1.8. The company is not very forthcoming about replying to questions.</p><p>3. Other Unexplored Options</p><p>3.1.</p><p>4 of 5 Document Control Heading – DINO-ADCS-TPS-GYRO 4/6/18 4. Design Decision – Analog Devices ADXRS150</p><p>4.1. Very simple to add to the s/c design since it attaches to a PCB we were already going to need.</p><p>4.2. Very inexpensive chip allows for extra purchases and more testing.</p><p>5 of 5</p>