Vehicle Stability Control for eLSD and Active Aero Actuators
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Solution Overview
Problem
Existing vehicle control systems face challenges in maintaining stability when using model predictive control (MPC) for electronic limited slip differentials and active aerodynamic actuators, as they may produce miscalculations due to inaccurate prediction models and conflict between control actions, leading to potential vehicle instability.
Innovation Solution
A system comprising a primary control module, a stability status module, and a supervisory control module that adjusts control actions in real-time to maintain vehicle stability by using a logic-based structure to manage integrated control systems, ensuring optimization constraints prevent instability and focus on main objectives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If model predictive control is used for electronic limited slip differentials and active aerodynamic actuators, then vehicle control performance is improved, but miscalculations may occur due to inaccurate prediction models leading to vehicle instability
Solution Approach 1:
The system implements a supervisory control module that continuously monitors vehicle stability status and feeds this information back to adjust control actions. The stability status module assesses real-time stability conditions and provides feedback to the supervisory control module, which then modifies control inputs to prevent instability, creating a closed-loop feedback system that compensates for prediction model inaccuracies.
Solution Approach 2:
The supervisory control module acts as an intermediary between the primary model predictive control system and the actual actuators. It receives control actions from the primary controller, adjusts them based on real-time stability assessments, and then applies the modified control actions to the electronic limited slip differential and active aerodynamic actuators, preventing miscalculations from causing instability.
2Adaptability or versatility
If multiple control actions are generated for integrated control systems, then control objectives are addressed, but conflict between control actions may occur leading to instability
Solution Approach 1:
The system merges multiple control actions from different control objectives into a single coordinated control strategy. The supervisory control module integrates control inputs for the electronic limited slip differential and active aerodynamic actuators, ensuring that control actions from different objectives work together harmoniously rather than conflicting, while maintaining vehicle stability.
Solution Approach 2:
The control system dynamically adjusts control actions based on real-time vehicle stability status. The supervisory control module continuously modifies control inputs according to current operating conditions, allowing the system to adapt to changing situations and resolve conflicts between control objectives dynamically rather than using fixed control strategies.
3Reliability
If control actions are adjusted in real-time to maintain stability, then vehicle stability is improved, but control system complexity increases
Solution Approach 1:
The control system is segmented into distinct functional modules: a primary control module for model predictive control, a stability status module for monitoring, and a supervisory control module for adjustment. This segmentation allows each module to perform its specific function independently, making the overall complex system more manageable and easier to implement while achieving real-time stability maintenance.
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 effectively maintains vehicle stability by adjusting control actions based on real-time stability assessments, reducing the risk of miscalculations and optimizing control inputs, especially for complex nonlinear systems, thereby enhancing vehicle performance and safety.
Implementation Method 1
The wing generates a downward force that is transmitted to the front or rear wheels of the vehicle. The attack angle of the wing is adjustable to adjust the amount of downward force generated by the wing.
Data Source
AI summary
A system includes a primary control module, a stability status module, and a supervisory control module. The primary control module is configured to determine at least one control action for at least one of an electronic limited slip differential and an aerodynamic actuator of a vehicle based on a driver command. The stability status module is configured to determine whether at least one component of the vehicle is stable or unstable based on an input from a sensor on the vehicle. The at least one component includes at least one of a vehicle body, a front axle, a rear axle, front wheels, and rear wheels. The supervisory control module is configured to adjust the at least one control action when the at least one component is unstable.