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Run npx skillmds@latest add ashfordeou/attitude-control-sizing in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Is Attitude Control Sizing free to use?

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Who published Attitude Control Sizing?

ashfordeOU (@ashfordeou) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Attitude Control Sizing by ashfordeou

Name: Attitude Control Sizing
Author: ashfordeOU

Attitude Control Sizing

Use when you must size the attitude control subsystem actuators for a spacecraft: compute the momentum wheel capacity for a commanded slew, check the detumble rate against the allowed rate, and verify the wheel momentum margin before the ADCS design review. Produces the slew momentum requirement, the detumble verdict, and the margin check that gates actuator selection. Trigger: attitude control, momentum wheel, adcs sizing, slew rate, detumble, spacecraft pointing.

ashfordeOU f260ca4 3 files · 5.8 KB Updated Sep 17, 2026

File contents

Spacecraft Attitude Control Sizing (space-systems/adcs/attitude-control-sizing)

Use when the task is spacecraft attitude control actuator sizing: momentum wheel capacity for slews, detumble rate checks, and wheel momentum margin.

Domain quick reference

Slew momentum: H = I * omega, where I is the spacecraft inertia and omega is the slew rate in radians per second.
A momentum wheel must store the slew momentum with margin; typical project bands require 30 percent or more.
Detumble: the post-separation angular rate must be reduced to within the allowed rate before pointing control.
Attitude control design follows ECSS-E-ST-60 practice.

Workflow

Collect spacecraft inertia and the commanded slew rate.
Compute the required wheel momentum with slew_momentum_from_deg.
Check the detumble rate with detumble_ok.
Verify the wheel margin with wheel_margin_ok.
Gate actuator selection on the margin verdict.

Pitfalls

Mixing degrees per second with radians per second.
Sizing the wheel to the nominal slew with no margin.
Skipping the detumble check after separation.

Behavior contract (gate 3)

The slew momentum, detumble, and margin logic is exercised by the gate 3 contract test: scripts/test_attitude_control_sizing.py against scripts/attitude_control_sizing_logic.py (stdlib unittest, offline). Run: python3 scripts/test_attitude_control_sizing.py

Compliance

Standards referenced, not reproduced: ECSS-E-ST-60 text is copyright ESA; the sizing here is common control physics, summary-only per standards-map.yaml.
compliance: STANDARDS-REF, gated: false.

---name: attitude-control-sizingdescription: Use when you must size the attitude control subsystem actuators for a spacecraft: compute the momentum wheel capacity for a commanded slew, check the detumble rate against the allowed rate, and verify the wheel momentum margin before the ADCS design review. Produces the slew momentum requirement, the detumble verdict, and the margin check that gates actuator selection. Trigger: attitude control, momentum wheel, adcs sizing, slew rate, detumble, spacecraft pointing.license: Apache-2.0---# Spacecraft Attitude Control Sizing (space-systems/adcs/attitude-control-sizing)Use when the task is spacecraft attitude control actuator sizing:momentum wheel capacity for slews, detumble rate checks, and wheelmomentum margin.## Domain quick reference- Slew momentum: H = I * omega, where I is the spacecraft inertia and omega is the slew rate in radians per second.- A momentum wheel must store the slew momentum with margin; typical project bands require 30 percent or more.- Detumble: the post-separation angular rate must be reduced to within the allowed rate before pointing control.- Attitude control design follows ECSS-E-ST-60 practice.## Workflow1. Collect spacecraft inertia and the commanded slew rate.2. Compute the required wheel momentum with slew_momentum_from_deg.3. Check the detumble rate with detumble_ok.4. Verify the wheel margin with wheel_margin_ok.5. Gate actuator selection on the margin verdict.## Pitfalls- Mixing degrees per second with radians per second.- Sizing the wheel to the nominal slew with no margin.- Skipping the detumble check after separation.## Behavior contract (gate 3)The slew momentum, detumble, and margin logic is exercised by thegate 3 contract test: scripts/test_attitude_control_sizing.pyagainst scripts/attitude_control_sizing_logic.py (stdlib unittest,offline). Run:python3 scripts/test_attitude_control_sizing.py## Compliance- Standards referenced, not reproduced: ECSS-E-ST-60 text is copyright ESA; the sizing here is common control physics, summary-only per standards-map.yaml.- compliance: STANDARDS-REF, gated: false.

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