Static PASS is not engineering freeze
A static calculation can be complete before the machine is ready for design freeze.
Read Static PASS is not engineering freeze →AURA Technical Notes
Concise engineering notes for bearing and rotor decisions.
Each note addresses one decision error: a result detached from its operating state, a subsystem detached from the machine, or a calculation mistaken for release.
Technical notes
From application fit to support architecture
Translate load path, speed and machine constraints into the correct gas-bearing support architecture.
Read From application fit to support architecture →Geometry, clearance and balance are the first validation gates
Why geometry, clearance and balance must be controlled before downstream evidence is trusted.
Read Geometry, clearance and balance are the first validation gates →Residual imbalance is not release evidence
A residual value belongs to a plane, method, machine capability and operating envelope.
Read Residual imbalance is not release evidence →Release evidence has an operating envelope
A result is only applicable inside the speed, load, thermal and configuration state that supports it.
Read Release evidence has an operating envelope →API 684 frames rotordynamics as an acceptance program
Critical speeds, response, stability and balancing form a connected programme.
Read API 684 frames rotordynamics as an acceptance program →The system failed. Every subsystem passed.
Interface evidence determines whether individually acceptable subsystems form an acceptable machine.
Read The system failed. Every subsystem passed. →A bearing coefficient needs an operating-point passport
Stiffness and damping must carry their geometry, clearance, load, speed and coordinate basis.
Read A bearing coefficient needs an operating-point passport →Precision spindle engineering
Architecture, gas-static support state and rotor response in one system-level path.
Open Precision spindle engineering →Start with a guide
Use the longer guides for a complete subject path.
Aerostatic bearing design guide
Architecture, clearance, restrictors, static performance and verification.
Open guide →Gas-bearing rotor dynamics guide
Modal families, critical speeds, response, stability and coefficient handoff.
Open guide →Rotor balancing and release guide
Residual unbalance, rotor class, repeatability and machine capability.
Open guide →