Open Loop Controllers
Open-loop controllers define vehicle inputs directly without feedback (for example, steering wheel angle vs. time).
Open-loop controllers can be used for all vehicle inputs. However, without feedback signals, no mechanism exists for the driver to achieve a desired vehicle response (for example, speed or path following). The vehicle’s properties alone determine its response to the open-loop inputs.
Use Cases
- Using experimental data \ data collected from real life testing such as steering wheel angle or throttle as vehicle inputs.
- Expression driven outputs - ‘SIN(TIME)’ , ’10.85’.
- Identifying vehicle properties like yaw-rate gain.
- Passing the signals computed from user defined controllers thru Altair Driver to the vehicle inputs.
Supported Driver Output Signal(s) - All
- Steer
- Throttle
- Brake
- Gear
- Clutch
Open Loop Keyword Types
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- MotionView
- Links MotionView solver-variable
-
- CURVE
- Populate driver signals from curve data
-
- EXPRESSION
- Expression driven driver signal
-
- CONSTANT
- Constant driver signal
- FREE
- Only applicable to Steer output signal
Release/Free the steering during a maneuver
[OPEN_LOOP_CONSTANT]
TAG = 'OPENLOOP'
TYPE = 'CONSTANT'
VALUE = 0.5
This creates a constant signal of value, 0.5.