Vehicle Stabilizer Control Without Torque Sensor
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Solution Overview
Problem
Existing stabilizer systems for motor vehicles require torque sensors for precise control, which occupy space, increase mass, and raise costs, and do not effectively account for simultaneous vertical kinematic variables of multiple wheels.
Innovation Solution
A method and system utilizing an electromechanical stabilizer arrangement with two modules and an actuator, where kinematic variables of each wheel are determined to calculate pilot control parameters, allowing for dynamic control of the actuator without a torque sensor, by using a control cascade with interconnected modules for angle, rotational speed, and power control, enabling active actuating interventions for rolling stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If torque sensors are used for precise control of stabilizer systems, then control precision is improved, but device complexity, mass, and costs increase
Solution Approach 1:
The patent extracts and eliminates the torque sensor from the stabilizer control system. Instead of measuring torque directly with a sensor, the system calculates the required stabilizer torque indirectly using kinematic variables (wheel positions, velocities, accelerations) and control algorithms (PID controller). This removal of the physical sensor directly reduces device complexity while maintaining control precision through computational methods.
Solution Approach 2:
The patent replaces the mechanical torque sensing system with an electromechanical control system. The physical torque measurement mechanism is substituted with electronic sensors (wheel speed sensors, position sensors) and computational algorithms that calculate torque requirements based on vehicle dynamics models and kinematic data. This substitution eliminates mechanical complexity while achieving precise control through electronic and software-based solutions.
2Measurement precision
If torque sensors are installed in stabilizer systems, then control accuracy is improved, but mass increases
Solution Approach 1:
The torque sensor is extracted and removed from the stabilizer assembly. The system achieves control accuracy without this heavy component by using lightweight electronic sensors and computational torque calculation, directly reducing the mass of the stabilizer system while maintaining or improving control accuracy through algorithmic approaches.
Solution Approach 2:
The heavy mechanical torque sensing system is replaced with lightweight electronic and software-based torque estimation. Electronic sensors and processors have significantly lower mass compared to mechanical torque sensors, achieving the same or better control accuracy while dramatically reducing system mass.
3Reliability
If traditional stabilizer control systems are used, then basic stabilization function is provided, but the system does not effectively account for simultaneous vertical kinematic variables of multiple wheels
Solution Approach 1:
The control system is designed with multi-functionality to handle multiple kinematic variables simultaneously. The PID controller and vehicle dynamics model process wheel positions, velocities, and accelerations from multiple wheels at the same time, integrating these variables into a unified torque calculation. This universal approach allows the system to adapt to various driving conditions and wheel configurations, improving both reliability and adaptability.
Solution Approach 2:
The system dynamically adjusts stabilizer torque based on real-time kinematic variables from multiple wheels. Rather than static or single-variable control, the system continuously processes changing wheel positions, velocities, and accelerations, adapting the stabilizer response to current vehicle dynamics. This dynamic multi-variable approach enhances both the reliability of stabilization and the system's ability to handle diverse driving scenarios.
Data Source
AI summary
A method for operating a stabilizer arrangement which has two stabilizer modules and an actuator, wherein the stabilizer modules are arranged along an axle of a motor vehicle and are acted on by the actuator, wherein at least one kinematic variable of each wheel which is oriented in the vertical direction of the axle is determined, wherein by using a value of the at least one kinematic variable a value for at least one pilot control parameter is determined by a pilot control arrangement, which value is made available to a control cascade which includes an angle control module, a rotational speed control module and a power control module, wherein a value for a power control for operating the actuator is made available by the control cascade from the value for the pilot control parameter, which is dependent on the value of the kinematic variable.