Wheel Motor Torque Compensation Using Hybrid Tire Sensor Feedback
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Solution Overview
Problem
Current individual wheel torque compensation systems in electric vehicles do not effectively utilize real-time data from tire and environmental conditions to optimize wheel motor compensation, leading to inefficient vehicle operation.
Innovation Solution
The implementation of hybrid wireless tire sensors (HWTSs) that provide real-time data on tire temperature, pressure, deformation, wear, rotational speed, wheel slip, and vibration-sound to a processor, which uses this data to adaptively control the vehicle and compensate wheel motors for optimal torque application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wheel speed, torque, and slip data are used for wheel motor compensation, then basic torque adjustment is achieved, but real-time tire and environmental conditions are not effectively utilized
Solution Approach 1:
The system implements feedback by continuously monitoring real-time tire conditions (temperature, pressure, deformation, wear) and environmental data through sensors, and using this information to dynamically adjust wheel motor torque compensation. The processor receives sensor data and feeds it back to the control system to optimize torque application based on current tire state and road conditions.
Solution Approach 2:
The tire sensors are designed to be self-powered through energy harvesting mechanisms that convert tire deformation during normal vehicle operation into electrical energy. This eliminates the need for external power sources or batteries, allowing the sensors to autonomously monitor and transmit tire condition data throughout the vehicle's operation.
2Productivity
If hybrid wireless tire sensors are implemented to provide real-time data, then adaptability and efficiency are improved, but device complexity increases
Solution Approach 1:
The hybrid wireless tire sensor system integrates multiple functions into a single device: it simultaneously monitors temperature, pressure, deformation, and wear conditions; harvests energy from tire movement; stores energy in an integrated capacitor; and wirelessly transmits data. This multi-functionality reduces the overall system complexity compared to having separate systems for each function.
Solution Approach 2:
The energy harvesting mechanism converts mechanical energy from tire deformation during normal vehicle operation into electrical energy, which automatically charges an integrated capacitor. This self-powered design eliminates the need for external power sources, batteries, or manual intervention, reducing system complexity while enabling continuous real-time monitoring throughout the vehicle's operation.
3Measurement precision
If real-time data from multiple sensors is utilized, then torque compensation accuracy is improved, but energy consumption increases
Solution Approach 1:
The energy harvesting mechanism captures mechanical energy from tire deformation during normal vehicle operation and converts it into electrical energy through a piezoelectric or electromagnetic generator. This harvested energy automatically charges an integrated capacitor, providing continuous power for the sensor electronics and wireless transmission without drawing from the vehicle's battery or consuming additional energy resources.
Solution Approach 2:
The system converts the mechanical energy that would otherwise be lost through tire deformation and road vibrations into useful electrical energy. The constant flexing and deformation of the tire during normal operation, which represents energy dissipation, is captured and transformed into power for the sensor system, turning a previously wasted resource into a beneficial energy source.
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 enables more efficient vehicle operation by allowing real-time adjustments to wheel motor torque based on tire and environmental conditions, improving driving dynamics and energy efficiency.
Implementation Method 1
The sensor may include a piezoelectric material that generates a voltage in response to a deformation of the tire
Data Source
AI summary
A wheel motor compensation system is for a vehicle. The vehicle has a wheel motor and a tire coupled to the wheel motor. The system includes a hybrid wireless tire sensor (HWTS) coupled to an interior of the tire, a processor electrically connected to the wheel motor, and a memory. The memory has instructions that, when executed by the processor, cause the processor to perform operations including gathering real time data with the HWTS, and utilizing the real time data to compensate the wheel motor so that preferred torque is applied to the tire.