Steering Torque Stabilization for Low-Speed Vehicle Balance
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Solution Overview
Problem
Existing vehicle stabilizing systems face challenges in maintaining stability, especially at low speeds, due to the complexity and cost of using multiple sensors to determine steering torque, which can lead to inaccurate calculations and increased costs, and often neglect the interaction between the vehicle and rider, affecting rider comfort and safety.
Innovation Solution
A system comprising sensors for vehicle speed, roll angle, and roll rate, along with a stabilizing unit that calculates and applies a stabilizing torque to the steering handle, using gain values and tuning parameters to provide precise and accurate steering support without interfering with the rider's intent, mimicking the rider's steering actions while optimizing cost and manufacturing simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors (yaw rate sensors, roll rate sensors, acceleration sensors, force sensors) are used to detect vehicle dynamic parameters for determining stabilizing torque, then the vehicle stability can be improved, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent extracts and eliminates unnecessary sensors from the conventional multi-sensor system. Instead of using yaw rate sensors, roll rate sensors, acceleration sensors, and force sensors, the invention uses only a steering torque sensor to detect the steering torque applied by the rider. This extraction of essential elements reduces device complexity while maintaining the core function of vehicle stabilization.
Solution Approach 2:
The patent uses a simplified measurement approach by copying the rider's steering torque input directly as the basis for stabilizing torque calculation. Rather than using multiple sensors to indirectly infer vehicle dynamics, the system directly copies the rider's steering intent and applies proportional stabilizing torque, reducing sensor requirements while maintaining stability effectiveness.
2Reliability
If multiple sensors and vehicle dynamic parameters are used to determine additional steering torque, then vehicle stability may be improved, but the manufacturing cost and assembly time increase
Solution Approach 1:
The patent removes unnecessary sensors and complex parameter measurement systems from the vehicle. By extracting only the essential steering torque sensor and eliminating yaw rate sensors, roll rate sensors, and multiple acceleration sensors, the invention significantly reduces manufacturing cost and assembly time while maintaining vehicle stability through direct steering torque-based control.
3Reliability
If yaw rate parameters are used for determining stabilizing torque, then vehicle balancing can be achieved, but the lead time for steering torque application is reduced, hampering rider intervention
Solution Approach 1:
The patent applies preliminary action by using steering torque sensor data that captures the rider's steering intent in real-time, allowing the stabilizing system to prepare and apply counter-torque before the rider completes their steering maneuver. This preliminary detection and response mechanism maintains adequate lead time for rider intervention while achieving effective vehicle balancing, unlike yaw rate-based systems that react too late.
4Reliability
If conventional stabilizing systems apply additional steering forces based on multiple dynamic parameters, then vehicle stability can be maintained, but the rider intervention and maneuvering capability are reduced
Solution Approach 1:
The patent implements feedback by continuously monitoring the steering torque applied by the rider and using this information to dynamically adjust the stabilizing torque. The system provides feedback to the rider through the steering handle, allowing the rider to maintain full maneuvering capability while the stabilizing system automatically compensates for instability, particularly at low speeds. This feedback mechanism preserves rider intervention capability unlike systems that override rider input.
Data Source
AI summary
A system includes: sensors that includes a position sensor to determine a vehicle speed, an angular displacement sensor to determine a roll angle corresponding to an angular displacement of the vehicle in a roll direction and a roll rate corresponding to an angular velocity of the vehicle in the roll direction, and a steering torque sensor to determine a steering torque applied to a steering handle of the vehicle; and a stabilizing unit coupled to the sensors. The stabilizing unit: determines a synthesized torque based on the roll angle, the roll rate, and the vehicle speed; determines a tuning parameter based on a comparison of the synthesized torque and the steering torque; determines a stabilizing torque based on the tuning parameter and the synthesized torque; and provides an actuating signal corresponding to the stabilizing torque for applying the stabilizing torque to the steering handle of the vehicle.