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 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 xmera/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.

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 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