scenario_AttGuidance

Overview

This script sets up a 6-DOF spacecraft orbiting Earth. The goal of the scenario is to make use of the hill pointing module with the Module: mrpFeedback module and a reaction wheel pyramid to control the attitude all within the new BSK_Sim architecture.

The script is found in the folder basilisk/examples/BskSim/scenarios and executed by using:

python3 scenario_AttGuidance.py

The simulation mimics the basic simulation simulation in the earlier tutorial in scenarioAttitudeGuidance.

The simulation layout is shown in the following illustration.

../../../_images/test_scenario_AttGuidance.svg

The initial setup for the simulation closely models that of scenario_FeedbackRW.

Custom Dynamics Configurations Instructions

The modules required for this scenario are identical to those used in scenario_FeedbackRW.

Custom FSW Configurations Instructions

Three of the four modules required to configure the Module: hillPoint FSW mode have already been included within the BSK_Fsw framework (mrpFeedbackRWConfig(), attTrackingErrorConfig(), rwMotorTorqueConfig()). The only remaining module is the hill pointing module itself which is set within __init__().

These modules provide the initial setup for an attitude guidance system that makes use of an hill pointing model, a module that tracks the error of the spacecraft’s MRP parameters against the vector pointing towards the central, planetary body, and uses a module that takes that information to provide a torque to correct for the error.

This event is triggered when a user calls self.masterSim.modeRequest = ‘hillPoint’ in any current or future BskSim file.

Illustration of Simulation Results

showPlots = True
../../../_images/scenario_AttGuidance_attitudeErrorNorm.svg ../../../_images/scenario_AttGuidance_rwMotorTorque.svg ../../../_images/scenario_AttGuidance_rateError.svg ../../../_images/scenario_AttGuidance_orientation.svg
scenario_AttGuidance.run(showPlots)[source]

The scenarios can be run with the followings setups parameters:

Parameters:

showPlots (bool) – Determines if the script should display plots

class scenario_AttGuidance.scenario_HillPointing[source]

Bases: BSKSim, BSKScenario

configure_initial_conditions()[source]

Developer must override this method in their BSK_Scenario derived subclass.

log_outputs()[source]

Developer must override this method in their BSK_Scenario derived subclass.

pull_outputs(showPlots)[source]

Developer must override this method in their BSK_Scenario derived subclass.