Difference between revisions of "Module/AOA adc"

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== Introduction ==
== Introduction ==


AOA_adc is a simple module that is be written to test the flight behaviour with a Angle Of Attacke sensor.  
AOA_adc is a simple module that is be written to test the flight behaviour with a Angle Of Attack sensor.  


It reads the value of an defined ADC port and converts it to and angle.  
It reads the value of an defined ADC port and converts it to and angle.  

Revision as of 03:27, 28 November 2017

Introduction

AOA_adc is a simple module that is be written to test the flight behaviour with a Angle Of Attack sensor.

It reads the value of an defined ADC port and converts it to and angle.

Implementation option A

A mode variable named h_ctl_pitch_mode in the stabilization_attitude.c enables to switch between estimator_theta (IMU) and estimator_AOA to control the elevator.

Measurements

{TODO: description}

Hardware

{TODO: image}

Angle of Attack ADC Sensor

  • US DIGITAL MA3-A10-236-N

If you are using the analog version of this sensor, be sure to connect it to a 5V tolerant ADC on you autopilot. For instance ADC2 on Lisa/M is not 5V tolerant, so a voltage divider is needed to scale the signal down to 3.3V. ModuleXML

  • AOA_adc.xml

Code- and headerfile

  • sw/airborne/modules/sensors

Settings file

  • AOA_adc.xml

Airframe Adjustments

  • (1) Insert the software module in the airframe:
  <modules>
    <load name="AOA_adc.xml">  
      <configure name="ADC_AOA" value="ADC_6"/>
      <define name="AOA_OFFSET" value="-0.135000005364"/>   
      <define name="AOA_FILTER" value="0.875999987125"/>   
      <define name="USE_AOA"/>  
    </load> 
  </modules>
  • Legend:
    • The ACS_AOA defines on whitch port the US Digital Sensor is connected to.
    • The AOA_OFFSET is needed to adjust the Zero rad mark in the normal flightposition. It can be changed with the AOA_adc.xml settings loaded.
    • The AOA_FILTER describes the PT1 filter value of the angle. 0 = no filter
    • Define USE_AOA to make the module work.
  • (2) Load the settings XML in the GCS: AOA_adc.xml
  • (3) Now you can turn on the pitch stabilization by setting the PITCH_Mode to 1
    • PITCH_Mode = 0 --> estimator_thata from IMU (default)