Vehicle Motion Sickness Control System Using Active Vibration Cancellation
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Solution Overview
Problem
Current automotive shock absorbers do not effectively dampen all vertical vibrations of vehicles, leading to motion sickness in occupants, which is undesirable for improved riding experiences.
Innovation Solution
A motion sickness control system that includes sensors to measure vehicle vibrations, a computer to actuate vibrators and active dampers at specific frequencies and damping coefficients, and biometric sensors to detect occupant discomfort, thereby attenuating vertical vibrations and minimizing motion sickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional shock absorbers are used in automotive suspension systems, then the vehicle can absorb vibrations during movement, but some vertical vibrations remain undamped causing motion sickness in occupants
Solution Approach 1:
The patent applies mechanical vibration by introducing active vibrators that generate counter-vibrations to cancel harmful vertical vibrations. The system uses sensors to detect vibration frequencies and actuators to produce opposing vibrations at the same frequency, effectively neutralizing the harmful vibrations that cause motion sickness while preserving the natural suspension function.
Solution Approach 2:
The system dynamically changes damping parameters by adjusting the stiffness and damping coefficients of active dampers in real-time based on detected vibration characteristics. This allows the suspension system to adapt to different road conditions and vibration frequencies, providing optimal damping performance across various operating scenarios to prevent motion sickness.
2Object-affected harmful factors
If active dampers and vibrators are added to the suspension system, then vertical vibrations can be attenuated to reduce motion sickness, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into the active damper assembly, combining vibration sensing, active damping control, and active vibration cancellation capabilities in a single integrated system. The control unit coordinates both dampers and vibrators to achieve both suspension and motion sickness prevention functions, reducing overall system complexity compared to separate systems.
Solution Approach 2:
The system employs feedback control by using sensors to continuously monitor vertical vibrations and feed this information to the control unit, which then adjusts the damper and vibrator outputs in real-time. This closed-loop control enables the system to automatically adapt to changing conditions without requiring complex manual adjustment mechanisms.
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
The system effectively cancels or attenuates vertical vibrations and other forces causing motion sickness, enhancing the comfort of vehicle occupants by using targeted vibration and damping strategies.
Implementation Method 1
a sensor configured to measure vibration of the vehicle
Implementation Method 2
actuate the vibrator at a target frequency based on the measured vibration of the vehicle. The target frequency attenuates the measured vibration of the vehicle
Implementation Method 3
an active damper configured to damp vertical movement of a wheel of the vehicle
Data Source
AI summary
A motion sickness control system for a vehicle includes a vibrator. The motion sickness control system includes a sensor configured to measure vibration of the vehicle. The motion sickness control system includes a computer having a processor and a memory storing instructions executable by the processor to actuate the vibrator at a target frequency based on the measured vibration of the vehicle. The target frequency attenuates the measured vibration of the vehicle.