🧭 Envelope Control

This repository studies control architectures that explicitly treat operational envelopes (sensor, actuator, and V–I limits) as first-class control states.

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💡 Concept

Conventional control systems prioritize performance and tracking accuracy.
Envelope Control instead prioritizes staying within the physically and operationally safe region of the controlled system.

In this framework:

• 🔄 Exceeding an operational envelope is treated as a state transition, not a disturbance
• 🧠 Finite State Machines (FSM) determine which control modes are permitted
• 🔐 Reconfiguration or redesign proposals may be generated externally,
  but application is strictly gated by predefined envelope constraints

👉 See:

• 📘 Envelope Control Concept
• 📐 Operational Envelope Definition

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🧠 Key Ideas

• 📦 Operational envelopes are explicit states, not implicit assumptions
• 🛡 Safety and survivability override performance optimization
• 🧩 Degradation is handled by mode restriction, not aggressive adaptation
• 🔋 Control systems must continue operating safely
  even under partial failures

👉 See:

• 🔄 FSM Design
• 📜 Design Rules

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🛠 Typical Use Cases

• 🚁 Multirotor drones with sensor or actuator degradation
• 🤖 Safety-critical robotic systems
• 🛰 Long-duration autonomous systems with aging components
• ⚡ Systems operating under strict power (V–I) constraints

👉 Example:

• 🔋 V–I Envelope Example

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📐 Scope

This repository focuses on architectural principles and design patterns.
It is not tied to a specific control law, optimizer, or AI model.

👉 🚫 Explicitly excluded:

• Real-time learning controllers
• Autonomous decision-making agents
• Runtime envelope redefinition

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📊 Status

This repository represents an independent research direction,
separate from prior AITL controller studies.

👉 📝 Design notes (non-normative):

• Design Log

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Envelope Control emphasizes knowing when not to exceed limits,
rather than how to optimize beyond them.

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Author

📌 Item	Details
Name	Shinichi Samizo
Expertise	Semiconductor devices (logic, memory, high-voltage mixed-signal) Thin-film piezo actuators for inkjet systems PrecisionCore printhead productization, BOM management, ISO training
GitHub

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License

📌 Item	License	Description
Source Code	MIT License	Free to use, modify, and redistribute
Text Materials	CC BY 4.0 or CC BY-SA 4.0	Attribution required; share-alike applies for BY-SA
Figures & Diagrams	CC BY-NC 4.0	Non-commercial use only
External References	Follow the original license	Cite the original source properly

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Feedback

Suggestions, improvements, and discussions are welcome via GitHub Discussions.