Vehicle Orientation Indicator Acceleration Noise Filtering
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Solution Overview
Problem
Existing vehicle orientation indicators face reliability issues due to spurious data from acceleration, deceleration, sharp turning, and driving on grades, which affect the accuracy of pitch and roll angle representations, especially in off-road conditions.
Innovation Solution
A vehicle orientation indicator system comprising a sensor and a controller that senses the force magnitude imposed on the vehicle, separates acceleration and gravitational components, and calculates a modified force magnitude to provide a stable representation of the vehicle's orientation, thereby filtering out spurious data and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pitch and roll sensors are used to indicate vehicle orientation, then the driver can assess vehicle orientation, but spurious data from acceleration and deceleration reduces measurement reliability
Solution Approach 1:
The sensor output data is segmented into distinct components: gravitational force components (representing true vehicle orientation) and acceleration force components (representing dynamic disturbances). The controller separately processes these components to isolate the gravitational signal from acceleration noise, thereby maintaining measurement precision while improving reliability during dynamic vehicle operations.
Solution Approach 2:
The controller extracts and removes the acceleration force component from the total sensor output to isolate the gravitational force component. This extraction process eliminates spurious data caused by acceleration and deceleration, allowing the system to provide accurate pitch and roll indications based solely on gravitational orientation regardless of vehicle dynamic state.
2Stability of the object's composition
If gauge displays are locked during acceleration conditions, then erratic display behavior is prevented, but accurate representation of vehicle orientation is lost
Solution Approach 1:
Instead of locking the display, the system extracts and removes the acceleration component from sensor data in real-time. This allows the gauge displays to continue updating and accurately represent vehicle orientation even during acceleration, deceleration, and turning maneuvers, maintaining both display stability and orientation representation accuracy simultaneously.
Solution Approach 2:
The system dynamically changes the processed sensor parameter by subtracting the acceleration component from the total force vector. This parameter transformation allows the display to show accurate gravitational orientation information while remaining stable and unaffected by dynamic vehicle conditions such as acceleration and turning.
3Productivity
If sensor data is used during acceleration and turning, then continuous orientation feedback is provided, but spurious data from dynamic conditions reduces accuracy
Solution Approach 1:
The sensor data is continuously segmented into gravitational and acceleration components, allowing the system to maintain continuous orientation feedback while filtering out spurious acceleration data. This segmentation enables uninterrupted display updates with accurate gravitational orientation information even during dynamic vehicle operations.
Solution Approach 2:
The controller continuously extracts the acceleration component from sensor output and removes it from the calculation, leaving only the gravitational force component for orientation display. This extraction process maintains continuous feedback productivity while eliminating accuracy-degrading spurious data from acceleration and turning conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enhances the accuracy and reliability of pitch and roll angle displays by removing acceleration-related noise, ensuring accurate representation during various driving conditions, including off-road maneuvers.
Implementation Method 1
The sensor is configured to sense a force magnitude imposed on a vehicle during movement of the vehicle. The force magnitude includes an acceleration force component generated by the movement of the vehicle
Implementation Method 2
The controller is configured to determine a value of the acceleration force component based on an acceleration of the vehicle with respect to a fixed plane, calculate a modified force magnitude by removing the value of the acceleration force component from the force magnitude, determine an orientation of the vehicle with respect to the fixed plane based on the modified force magnitude
Data Source
AI summary
A vehicle orientation indicator comprises a sensor and a controller. The sensor is configured to sense a force magnitude imposed on a vehicle during movement of the vehicle. The force magnitude includes an acceleration force component generated by the movement of the vehicle and a gravitational force component. The controller is configured to determine a value of the acceleration force component based on an acceleration of the vehicle with respect to a fixed plane, calculate a modified force magnitude by removing the value of the acceleration force component from the force magnitude, determine an orientation of the vehicle with respect to the fixed plane based on the modified force magnitude and control an indicator device to provide a representation of the orientation of the vehicle.