1 / 15

TEAM 9 - MRAV DESIGN CONSTRAINTS ANALYSIS

TEAM 9 - MRAV DESIGN CONSTRAINTS ANALYSIS. by Nick Gentry. UPDATED PSSC. An ability to remotely monitor remaining battery life (fuel gauge). An ability to hover in a stable position (based on autonomous stability / control algorithm).

carver
Download Presentation

TEAM 9 - MRAV DESIGN CONSTRAINTS ANALYSIS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. TEAM 9 - MRAVDESIGN CONSTRAINTS ANALYSIS by Nick Gentry

  2. UPDATED PSSC An ability to remotely monitor remaining battery life (fuel gauge). An ability to hover in a stable position (based on autonomous stability / control algorithm). An ability to fly in any direction (compass orientation) at a variable speed and a stable altitude (based on autonomous stability / control algorithm). An ability to take off/land (ascend / descend) while remaining level (based on autonomous stability / control). An ability to remotely control flight functions (e.g., ascend, descend, hover, compass orientation, forward speed).

  3. MAJOR DESIGN CONSTRAINTS • Microcontroller must be able to run PID algorithm and Kalman filter at speeds > 50Hz • Microcontroller must have SPI (x1), I2C (x4), UART (x3), PWM (x4), and ADC (x6). • WiFi module must have baud rate > 400kbps to stream JPEG compressed 640x480i video at ~4fps • On-board power supply must be able to source 14.8V with max current draw of 50A • Motors must provide enough thrust to achieve a 2:1 thrust to vehicle weight ratio

  4. IMU (Inertial Measurement Unit) 3-Axis Gryoscope ITG3200 (I2C interface) 3-Axis Accelerometer • LIS3LV02DQ (I2C interface) 3-Axis Magnetometer HMC6343 (I2C interface)

  5. Brushless Motors Constraints: • Greater than 2:1 thrust to vehicle weight ratio • Current should not exceed 10A per motor @ 14.8V Selection: • MK2832/35 Brushless 14-Pole • Lithium Cell Count: 4 • Maximum load current: 10A • No load speed: 760RPM/V • Maximum Thrust (10x4.5 prop): 820g per motor

  6. Electronic Speed Control Constraints: • Must be able to source > 10A @ 14.8V Selection: • Turnigy Basic 18A ver3.1 • Lithium Cell Count: 2-4 • Maximum load current: 22A • Continuous Current: 18A

  7. Battery • Constraints: • Must be able to supply > 50A @ 14.8V • Runtime > 10 minutes • Selection: • Turnigy Nano-Tech • 14.8V / 4500mAh • 25C Discharge Rate

  8. Camera • Constraints: • CMOS sensor with resolution >640x480 pixels • On-board JPEG compression • Selection: • Toshiba TCM8240 • Max resolution of 1300x1040 pixels • 10:1 Internal JPEG compression • I2C interface

  9. Wireless Module • Constraints: • Baud rate > 400kbps to achieve proper transmission of video and control data • Selection: • Roving Networks RN-131G • 802.11 b/g • WPA/WPA2 • 4uA sleep • 40mA Rx • 210mA Tx

  10. Battery Monitor • Constraints: • Must be able to monitor 4 Li-Po Cells • Undercharge / Overcharge Protection • Selection: • MAXIM DS2788 1-10 Cell Li-Po Monitor • Parameters: Voltage, Current, and Temperature • Outputs remaining battery %

  11. Primary Microcontroller • Constraints: • Purpose: Run Stability Algorithm • Peripherals • I2C x2 • SPI x1 • UART x2 • Six channels of 12-Bit ATD • Four channels of PWM • Selection: • Texas Instruments MSP430F5438 16-Bit 25MHz • 256KB Flash • 16KB Ram

  12. Secondary Microcontroller • Constraints: • Purpose: Process video + WiFi interface • Peripherals • I2C x2 • UART x2 • Selection: • Texas Instruments MSP430F2618 16-Bit 16MHz • 116KB Flash • 8KB Ram

  13. Airframe • Constraints: • Rigid structure • Lightweight / durable material • Selection: • Mikrokopter MK50 Frame • Extruded Aluminum beams • Carbon fiber base plate • 120 grams

  14. 14.8 VDC unreg5 VDC reg via LM7805 @ 1A 3 VDC reg via LM3940 @ 300mA 14.8 VDC Li-Po Battery Pack Power Supply Speed Controller Motor 2 2 2 Motor Speed Controller Speed Controller Motor Speed Controller Motor UART I2C 8 bits MSP430F2618TPN UART I2C System Block Diagram DB9 Reset Controller 16x2 LCD Max232 2 RESET SPI UART ADC PWM PWM I2C MSP430F5438TPN PWM PWM I2C UART Ultrasonic Range Sensor x6 6 3-Axis Accelerometer 3 3-Axis MEMS Gyroscope 3 CMOS Camera 3 Base Station (GUI Software) Wifi Module 2 4-Cell Battery Monitor 3

  15. The END

More Related