Motor Vibration Alerts for Self-Balancing Vehicle Thresholds
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Solution Overview
Problem
Existing rider notification systems in self-balancing electric vehicles are not effective under all conditions, particularly when visual indicators are not feasible, and there is a need for improved non-visual methods to alert riders of approaching or exceeding operational thresholds such as speed, torque, and battery levels.
Innovation Solution
A vibrational notification system using the electric motor's field-oriented control to induce vibrations through changes in quadrature voltage, providing tactile cues to the rider without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual notification systems (illuminators) are used to alert riders of operational thresholds, then riders can be notified of motor conditions, but the system requires additional hardware to be installed in the vehicle
Solution Approach 1:
The motor controller uses the motor itself to generate vibrational notifications instead of requiring separate notification hardware. The motor serves dual purposes: propulsion and notification, eliminating the need for additional illuminators or alert devices
Solution Approach 2:
The motor is made multi-functional by using it both for vehicle propulsion and for generating tactile notifications. The same actuator that drives the wheel also provides haptic feedback to the rider through controlled vibrations
2Reliability
If visual notification systems are used to alert riders, then riders can be informed of approaching thresholds, but the notification may not be effective under all conditions (e.g., when rider attention is focused on the path)
Solution Approach 1:
Visual notification systems are replaced with a tactile/mechanical notification system. Instead of using light-based illuminators that require visual attention, the system uses motor-generated vibrations that provide tactile feedback, allowing riders to perceive notifications through touch rather than sight
Solution Approach 2:
The notification system utilizes mechanical vibrations generated by the motor to communicate with the rider. By applying controlled vibrational patterns through the motor housing, the system creates tactile cues that are perceptible to the rider's sense of touch, ensuring notification effectiveness regardless of visual conditions
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
Effectively notifies riders of operational thresholds and potential issues through tactile feedback, enhancing safety and usability by allowing riders to respond proactively without needing to visually check indicators.
Implementation Method 1
the vibrational impulses comprise increases and decreases in a quadrature voltage applied to the motor
Data Source
AI summary
A method for vibrationally notifying a rider of a self-balancing electric vehicle may include: operating a self-balancing electric vehicle, receiving, at a motor controller of a self-balancing electric vehicle, a measured value corresponding to a first parameter of the self-balancing electric vehicle, and applying a first pattern of vibrational impulses to a motor of the self-balancing electric vehicle in response to the self-balancing electric vehicle satisfying a first operational threshold value.