Racing Wheel Torque Closed Loop With Static Torsion Sensing
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Solution Overview
Problem
Simulated racing wheelbases face inaccuracies in torque measurement and poor dynamic response due to torque open loops, posing challenges for both hardware and algorithms, leading to suboptimal user experience.
Innovation Solution
A high precision and high response torque closed loop system is implemented using a static torsion sensor, quick release module, motor module, and slip ring, which accurately senses the force feedback on a steering wheel and employs incremental PI adjustment with torque feedforward for precise control, forming a double-closed-loop system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional dynamic torsion sensor is used to measure torque in a racing simulation wheelbase, then the sensor can detect torsion during motor rotation, but the measurement accuracy of external force is poor
Solution Approach 1:
The patent inverts the traditional dynamic torsion sensor approach by using a static torsion sensor that measures torque through the stationary motor shaft rather than during motor rotation. This inversion allows accurate measurement of external force applied to the steering wheel while the sensor remains stationary, resolving the contradiction between dynamic measurement capability and external force measurement accuracy
2Device complexity
If a torque open loop system is used in simulated racing wheelbases, then the system structure is simpler, but the torque precision and dynamic response are poor
Solution Approach 1:
The patent implements a torque closed-loop control system where the static torsion sensor continuously measures the actual torque applied to the steering wheel and feeds this information back to the controller. The controller compares the measured torque with the target torque and adjusts the motor output accordingly, achieving high torque precision and dynamic response while maintaining reasonable system complexity
3Measurement precision
If a torque closed loop system is implemented in simulated racing wheelbases, then torque precision control is improved, but the challenges to hardware and algorithm complexity increase significantly
Solution Approach 1:
The patent replaces complex mechanical torque sensing mechanisms with an electrical measurement approach using a static torsion sensor that measures torque through the motor shaft. This substitution simplifies the hardware structure while achieving high torque precision control through electrical sensing and digital signal processing in the closed-loop control algorithm
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
This solution enhances torque precision control, allowing for realistic simulations of various racing scenarios, such as road shoulders and sand lands, thereby improving user experience and providing a more realistic feel for racing drivers.
Implementation Method 1
the sensing module includes a torsion sensor, an expansion sleeve and an adapter sleeve; the expansion sleeve is disposed on the motor shaft in a sleeving manner, and the adapter sleeve is disposed on the expansion sleeve in a sleeving manner; and the torsion sensor is disposed on the adapter sleeve in a sleeving manner, and is connected to the adapter sleeve and the sleeve, respectively
Data Source
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AI summary
Disclosed are a racing simulation device and algorithm based on a high precision and high response torque closed loop. The racing simulation device includes a quick release module, a motor module, a sensing module and a sleeve. One end of the motor module is connected to the sensing module; a connecting seat is disposed at one end of the sleeve, one end of the connecting seat is connected to the sleeve, and the other end of the connecting seat is disposed inside the quick release module; one end of the quick release module is connected to a steering wheel; the torque closed loop adopts incremental PI adjustment output, which is accumulated with torque feedforward to output a given current, and current amplitude is limited, so an entire torque is closed to form a double-closed-loop form in combination with a current closed loop, and torque precision control is further improved.