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Aerostatic bearing design · rotor-system engineering

Design the bearing. Configure the spindle. Verify the rotor.

AURA is professional engineering software for direct calculation and inverse synthesis of aerostatic bearing systems. It connects the selected support to the drive, shaft, tool and rotor model, then records what the connected result is ready to prove.

Calculation core

Calculate the support you have — or synthesise the support you need.

AURA treats direct analysis and inverse design as two views of the same engineering model. The engineer can evaluate a defined gas-static bearing or begin with required performance and search for a feasible parameter set.

DIRECT CALCULATION

Known geometry → performance

Define radius, length, clearance, supply pressure, gas state, restrictor or feed configuration, load and operating speed. Calculate load capacity, flow, stiffness, damping, cross-coupling and operating state.

INVERSE SYNTHESIS

Required performance → configuration

Start from load, stiffness, flow, geometry envelope, pressure limit, clearance constraint and system targets. AURA supports parameter synthesis and candidate comparison inside the feasible design space.

Connected machine model

The bearing result belongs to a spindle and rotor — not to an isolated calculator.

Support coefficients only become useful when they remain tied to the geometry, clearance and operating state that produced them, and to the machine layout that consumes them.

Drive Unitmotor, torque, speed and drive-side configuration
Shaftsegments, material, span, disks and mass distribution
Tooloverhang, interface, load and assembly state
Supportslocations, reactions, stiffness, damping and clearance
Rotor Dynamicscritical speed, response, orbit and stability

Platform architecture

Five layers — in the correct commercial order.

LAYER 1

Calculation Core

Direct bearing calculation and inverse parameter synthesis.

LAYER 2

Configuration Workflow

Drive, shaft, tool, supports, reactions and load path.

LAYER 3

Rotor Dynamics

Critical speeds, Campbell, unbalance response, orbit, damping and stability.

LAYER 4

Evidence Layer

Provenance, validation, geometry, clearance, balancing, assembly and operating envelope.

LAYER 5

Decision Layer

Decision class, missing evidence, required next action and release boundary.

Recognisable engineering outputs

Built around the questions engineers already ask.

  • Air-bearing load capacity
  • Static and dynamic stiffness
  • Air or gas consumption
  • Damping and cross-coupling
  • Support reactions and load path
  • Critical speeds and mode shapes
  • Campbell behaviour
  • Unbalance response
  • Bode response and orbit
  • Stability and clearance indicators
  • Balancing evidence authority
  • Validation and release boundary

Decision authority

A clean calculation does not automatically authorise release.

The upper AURA layers state whether the model, measurement, balancing, assembly and validation evidence support the intended decision.

PASSREVIEWSCREENING ONLYTEST REQUIREDHOLD
Product principle: AURA is calculation-first, but not calculation-only. Evidence controls the authority of the result; it does not replace the calculation core.

Application fit

For high-speed and precision systems where the support changes the rotor.

Precision and grinding spindles

Support sizing, tool overhang, stiffness, flow, run-up response and balancing state.

Microturbomachinery

Compact rotor layout, speed-dependent support behaviour, critical-speed and stability screening.

Metrology and semiconductor rotors

Non-contact support, repeatability-sensitive configuration and explicit evidence boundaries.

Cryogenic and special-gas rotors

State-specific support evidence and controlled limits on thermo-fluid and release claims.

R&D bearing development

Direct calculation, inverse synthesis, candidate comparison and validation planning.

Custom rotating machinery

Defined machine architecture, load path and decision question assessed in a scoped pilot.

FAQ

Technical product questions

What does AURA calculate for an aerostatic bearing?

Geometry, clearance, supply pressure, feed configuration, gas state, load and speed are connected to load capacity, flow, stiffness, damping, cross-coupling and operating-state outputs.

Does AURA support inverse air-bearing design?

Yes. The inverse task begins with required load, stiffness, flow, geometry, pressure and clearance constraints and supports parameter synthesis for a feasible bearing configuration.

How does AURA connect the bearing to rotor dynamics?

The selected support state is placed in the Drive Unit → Shaft → Tool → Supports configuration. Its locations, reactions and coefficients enter critical-speed, unbalance-response, orbit and stability screening.

Is the evidence layer the calculation engine?

No. Calculation and synthesis are Layer 1. Evidence is Layer 4: it records provenance, configuration state, validation, balancing, assembly and operating-envelope evidence so Layer 5 can set the correct release boundary.

How is AURA currently accessed?

Current full workflows are delivered through expert-assisted, scoped pilot cases. The public website and demo expose the product workflow without exposing proprietary solver internals.

Current access

Bring one defined bearing-and-rotor problem.

A strong first pilot has a machine type, speed range, load or stiffness target, geometry constraints, support concept and a clear engineering decision.