Weight Redesign Strategy
Why Weights Are the Correct Levers
In H∞ control, weight functions define:
- performance demand
- robustness margin
- actuator protection
They encode design intent.
Strict Rule
Never redesign all weights simultaneously.
Global redesign:
- destroys design intent
- causes unnecessary conservatism
- complicates validation
One-to-One Mapping
| Degradation Type | Weight to Redesign | Purpose |
|---|---|---|
| Low-frequency Δ | ( W_s ) | Relax performance demand |
| High-frequency Δ | ( W_t ) | Increase robustness margin |
| Input-side Δ | ( W_u ) | Protect actuators |
Role of the LLM
The LLM does:
- qualitative reasoning
- strategy selection
- direction-of-change decisions
The LLM does not:
- tune numerical parameters
- run optimization loops
- replace control synthesis
Separation of Concerns
- LLM: what to change
- Templates / code: how to change
- FSM: when to change