Reference
Glossary
Look up 4ACE product terms, SIM inputs, setup terms, simulation terms, and analysis terms.
Use this glossary when a 4ACE term appears in setup, simulation, analysis, billing, or team workflow docs.
For units, signs, and axis notes, use Units and conventions.
| Term | Meaning | Related page |
|---|
| 4ACE | Team workspace for preparing simulation inputs, running SIM workflows, and analyzing outputs. | Welcome to 4ACE |
| Active team | Team currently selected in the sidebar. Product tables, permissions, credits, inputs, simulations, and analysis data are scoped by this team. | Account and team |
| Credits | Team-shared balance used for simulation cost checks and simulation queueing. | Team credits |
| Module permissions | Role-controlled permissions that decide whether a user can create, edit, duplicate, delete, or queue product records. | Manage team members |
| Team defaults | Team-scoped defaults saved from simulation settings or account preferences. | User preferences |
| Term | Meaning | Related page |
|---|
| Aerodynamics | Vehicle submodule for drag, lift, ride-height dependency, speed dependency, and yaw dependency. | Aerodynamics submodule |
| Ambient | Reusable SIM input for air, wind, and track-condition assumptions. | Ambients |
| Body | Vehicle submodule for sprung mass, dimensions, inertia, and ground-clearance contact points. | Body submodule |
| Brakes | Vehicle submodule for hydraulic distribution, cylinder areas, caliper area, brake radius, and pad friction. | Brakes submodule |
| Circuit | Reusable track input created from CSV data, with map orientation and circuit metadata. | Circuits |
| Design | Product area where reusable vehicle setup modules, lookup tables, and polynomials are created before vehicle assembly. | Vehicle submodules |
| Driver | Reusable SIM input for a driver or baseline driver profile, including driver limits such as throttle rate and brake force. | Drivers |
| Driver Input | OpenSim control timeline for throttle, brake, steer angle, and optional gear. Different from Driver. | Driver Inputs |
| Drivetrain | Vehicle submodule for engine, gearbox, drive split, efficiency, and differential behavior. | Drivetrain submodule |
| Lookup table | Reusable 1D or 2D numeric map selected by vehicle submodule parameters that support lookup-table mode. | Lookup tables |
| Polynomial | Coefficient-based curve selected by vehicle submodule parameters that support polynomial mode. | Polynomials |
| Steering | Vehicle submodule for rack travel, steering ratio behavior, and camber change from steering input. | Steering submodule |
| Submodule | Reusable setup block selected by vehicles, such as body, suspension, steering, brakes, drivetrain, aerodynamics, or tires. | Vehicle submodules |
| Suspension | Vehicle submodule for springs, dampers, anti-roll bars, stops, kinematics, compliance, setup values, and unsprung mass. | Suspension submodule |
| Tires | Vehicle submodule for tire structure, longitudinal grip, lateral grip, and camber dependency. | Tires submodule |
| Vehicle | Simulation-ready assembly that selects required submodules into one car model. | Vehicles |
| Vehicle Assembly | Vehicle section where body, suspension, steering, brakes, drivetrain, aerodynamics, and tire modules are selected. | Set up a vehicle |
| Term | Meaning | Related page |
|---|
| Batch Simulation | Simulation workflow that generates multiple runs from one setup and a design space. | Run Batch Simulations |
| Design space | Set of ambient or vehicle parameter scenarios used to generate batch simulation designs. | Run Batch Simulations |
| FastSim | Circuit-based simulation type that uses vehicle, circuit, ambient, and driver inputs. | Run FastSim |
| Full factorial design matrix | Batch design method that combines every selected parameter level with every other selected level. | Run Batch Simulations |
| OpenSim | Open simulation type that uses vehicle, ambient, driver, and Driver Input timelines instead of a circuit selector. | Run OpenSim |
| Simulation | Submitted SIM run that appears in the Simulations table with status, selected inputs, settings, results, and processing details. | Running simulations |
| Simulation settings | Solver and run controls such as step time, export rate, solver type, start velocity, start gear, duration, and lap count. | Run FastSim |
| Term | Meaning | Related page |
|---|
| Analysis layout | Saved Detailed Analysis view containing panels, channels, chart behavior, axis settings, and lap colors. | Set up analysis layouts |
| Batch Analysis | Analysis workflow for comparing completed batch runs across input dimensions, output metrics, correlations, and selected traces. | Analyze batch simulation results |
| Channel | Telemetry signal available in analysis, such as speed, throttle, brake pressure, tire load, or track banking. | Analyze simulation telemetry |
| Cursor Data | Analysis panel that shows channel values at the current cursor position. | Analyze simulation telemetry |
| Delta Time | Computed analysis channel used with a reference lap. Its unit changes with x-axis mode. | Analyze simulation telemetry |
| Detailed Analysis | Analysis workflow for loading simulations, selecting laps, comparing runs, and inspecting telemetry. | Analyze simulation telemetry |
| Dimension | Batch Analysis input or output value used for filtering, plotting, correlation, and comparison. | Analyze batch simulation results |
| Reference lap | Selected lap used as the baseline for Delta Time calculations. | Analyze simulation telemetry |
| Telemetry | Simulation output traces shown in analysis channels and charts. | Analyze simulation telemetry |
| Track Map | Analysis area that shows cursor position on the circuit map when usable track data exists. | Analyze simulation telemetry |
| Term | Meaning | Related page |
|---|
| Aero balance | Aerodynamic output or analysis metric describing front-rear distribution of aero load. | Analyze batch simulation results |
| Anti-roll bar | Suspension element that resists roll through force versus wheel travel behavior. | Suspension submodule |
| Brake distribution | Ratio of front brake hydraulic pressure to total brake pressure. | Brakes submodule |
| Bump rubber | Suspension stop that engages after a configured clearance in compression. | Suspension submodule |
| Camber angle | Wheel angle where positive camber means top of wheel is farther from car center than bottom. | Units and conventions |
Cd | Aerodynamic drag coefficient. Current aerodynamic text treats Cd as positive. | Aerodynamics submodule |
Clf | Aerodynamic lift coefficient for front axle. Positive value means less load on front axle as speed increases. | Aerodynamics submodule |
Clr | Aerodynamic lift coefficient for rear axle. Positive value means less load on rear axle as speed increases. | Aerodynamics submodule |
| CoG | Center of gravity. Body and suspension fields use CoG values to describe mass position. | Body submodule |
| Downforce | Aerodynamic load that increases axle load. Current aerodynamic coefficient text represents downforce with negative lift coefficients. | Units and conventions |
| Final drive | Gear ratio after gearbox output. A ratio above 1 means input speed is higher than output speed. | Drivetrain submodule |
| Motion ratio | Relationship between wheel travel and spring, damper, or third-element travel. | Suspension submodule |
| Mue | Tire friction coefficient term used in tire parameter names. | Tires submodule |
| Rebound stop | Suspension stop that engages after a configured clearance in rebound. | Suspension submodule |
| Ride height | Vertical distance between ground and chosen measurement point on sprung body. | Suspension submodule |
| Slip angle | Tire angle used in lateral and combined-slip tire behavior and telemetry. | Tires submodule |
| Slip ratio | Tire longitudinal slip value used in longitudinal and combined-slip tire behavior and telemetry. | Tires submodule |
| Sprung mass | Body and attached mass supported by suspension, with half of suspension link arms and drive shafts included in the current body description. | Body submodule |
| Toe angle | Wheel angle where positive toe means front of wheel is closer to car center than rear. | Units and conventions |
| Track global grip | Ambient gain that scales grip around the track with local grip levels and tire gains or scalings. | Ambients |
| Unsprung mass | Mass on wheel side of suspension, typically including wheel-side components plus half of suspension elements and drive shafts. | Suspension submodule |
| Wheelbase | Distance from front axle center to rear axle center. | Body submodule |