scenarioAttitudeFeedbackRWPower

Overview

Illustrates how to add a Module: ReactionWheelPower to the simulation to track the RW power usages. Further, a the RW power modules are connected to a battery to illustrate the energy usage during this maneuver. This script expands on scenarioAttitudeFeedbackRW.

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

python3 scenarioAttitudeFeedbackRWPower.py

The simulation layout is shown in the following illustration. A single simulation process is created which contains both the spacecraft simulation modules, as well as the Flight Software (FSW) algorithm modules. The 3 separate Module: ReactionWheelPower instances are created to model the RW power requirements. For more examples on using the RW power module see test_unitReactionWheelPower. Next, a battery module is created using Module: simpleBattery. All the RW power draw messages are connected to the battery to model the total energy usage.

Illustration of Simulation Results

The first simulation scenario is run with useRwPowerGeneration = False to model RW devices which require electrical power to accelerate and decelerate the fly wheels. The attitude history should be the same as in scenarioAttitudeFeedbackRW. Shown below are the resulting RW power requirements, as well as the time history of the battery state.

show_plots = True, useRwPowerGeneration = False

The next simulation allows 50% of the breaking power to be returned to the power system. You can see how this will reduce the overall maneuver energy requirements.

show_plots = True, useRwPowerGeneration = True

scenarioAttitudeFeedbackRWPower.plot_attitude_error(timeData, dataSigmaBR)

Plot the attitude errors.

scenarioAttitudeFeedbackRWPower.plot_rw_motor_torque(timeData, dataUsReq, dataRW, numRW)

Plot the RW actual motor torques.

scenarioAttitudeFeedbackRWPower.plot_rw_power(timeData, dataRwPower, numRW)

Plot the RW actual motor torques.

scenarioAttitudeFeedbackRWPower.run(show_plots, useRwPowerGeneration)

The scenarios can be run with the followings setups parameters:

Parameters:

• show_plots (bool) – Determines if the script should display plots

• useRwPowerGeneration (bool) – Specify if the RW power generation ability is being model when breaking