RC Vehicle Pitch Control via Torque Feedback
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Solution Overview
Problem
Remote-control vehicles struggle to perform controlled wheelies and stoppies due to high power-to-weight ratios and lack of mechanical stabilization, making it difficult for operators to maintain these maneuvers without the vehicle overturning or somersaulting.
Innovation Solution
A remote-control vehicle equipped with a first and second wheel offset along its longitudinal axis, a torque application device, a sensor to monitor the pitch angle, and a control module that adjusts torque to maintain the vehicle at acute angles, allowing for controlled wheelies and stoppies without the need for a wheelie bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mechanical stabilization (wheelie bar) is used to maintain wheelie attitude, then vehicle stability is improved, but device complexity increases
Solution Approach 1:
The patent replaces the mechanical wheelie bar stabilization system with an electronic control system that uses sensors to detect vehicle attitude and a control module to regulate motor torque. This substitution eliminates the need for physical support structures while achieving stable wheelie performance through electronic feedback control.
Solution Approach 2:
The vehicle performs self-stabilization during wheelie maneuvers through an integrated control system that automatically monitors pitch angle via sensors and adjusts motor torque in real-time. The system serves itself by autonomously maintaining the desired attitude without external mechanical assistance or operator intervention.
2Power
If high power-to-weight ratio is used to perform wheelies, then maneuver capability is improved, but vehicle control deteriorates
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor the vehicle's pitch angle and transmit this information to the control module. The control module uses this feedback to dynamically adjust motor torque, preventing excessive power application that would cause loss of control. This closed-loop feedback enables precise control despite high power-to-weight ratio.
Solution Approach 2:
The control system dynamically adjusts motor torque based on real-time vehicle attitude rather than applying fixed power. This dynamic regulation allows the vehicle to exploit high power-to-weight ratio for rapid attitude changes while preventing失控 through continuous adaptation of power delivery to current operational conditions.
3Productivity
If operator applies brake pressure to perform front wheelie, then maneuver execution is improved, but maneuver control deteriorates
Solution Approach 1:
The patent replaces manual brake application with electronic motor torque control to achieve front wheelie maneuvers. The control module precisely regulates motor power delivery based on sensor feedback, substituting the imprecise mechanical brake application process with electronic control that offers superior precision and repeatability.
Solution Approach 2:
The system changes the control parameter from manual brake pressure to electronic motor torque regulation. This parameter change enables more precise and controllable maneuver execution, as electronic torque control offers finer resolution and faster response compared to mechanical brake application.
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
Enables remote-control vehicles to perform wheelies and stoppies in a stable and controlled manner by automatically adjusting torque to maintain the vehicle's pitch angle within a specified range, independent of operator weight shifts, thus preventing overturning.
Implementation Method 1
a sensor configured to monitor the pitch angle of the vehicle
Implementation Method 2
a device adapted to apply a torque to the first wheel
Data Source
Figure 1
Figure 2~2F
Figure 3~3E
AI summary
A remote-control vehicle is disclosed. The vehicle comprises a first wheel and a second wheel offset along the longitudinal axis of the vehicle. The vehicle further comprises a device adapted to apply a torque to the first wheel, a sensor configured to monitor the pitch angle of the vehicle, and a control module. The control module is configured to control the torque applied by the device to the first wheel in accordance with the monitored vehicle pitch angle so as to accelerate the vehicle while maintaining the vehicle pitch angle within a range of acute angles. Also disclosed is a second remote-control vehicle, comprising: a first wheel and a second wheel offset along the longitudinal axis of the vehicle, a steering system adapted to steer the first wheel, a sensor configured to monitor the roll angle of the vehicle, and a control module configured to control the steering of the first wheel in accordance with the monitored vehicle roll angle while the vehicle is travelling so as to maintain the vehicle roll angle within a range of acute angles. A third remote-control vehicle is also disclosed and comprises: a first wheel and a second wheel, a device adapted to apply a torque to the first wheel, a sensor configured to monitor the pitch angle of the vehicle, and a control module configured to control the torque applied by the device to the first wheel in accordance with the monitored vehicle pitch angle when the vehicle is in free fall so as to maintain the vehicle pitch angle within a specified range of angles.