Active Vehicle Seat Suspension Vibration Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seat suspension systems using hydraulic damping fail to effectively attenuate vibrations at higher frequencies, resulting in a bumpy ride for vehicle operators, especially at high speeds.
Innovation Solution
A suspension system incorporating a pneumatic shock absorber with an electric motor and sensors to actively adjust the seat's height and pressure level, using a controller to generate control signals that counteract vibration-induced changes, providing active compensation for vibrations beyond the frequency range of hydraulic damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydraulic damping is used to reduce vibration, then low-frequency vibrations are attenuated, but high-frequency vibrations are not effectively reduced
Solution Approach 1:
The patent replaces the passive hydraulic damping system with an active electromagnetic actuation system. The electromagnetic actuator responds to control signals from the controller based on sensor feedback, enabling rapid response to high-frequency vibrations that hydraulic systems cannot handle. This substitution of mechanical hydraulic damping with electromechanical active control resolves the frequency response limitation.
Solution Approach 2:
The patent implements a feedback control system where sensors detect seat position or acceleration, the controller processes this information, and the electromagnetic actuator applies counteracting forces. This closed-loop feedback enables the system to respond dynamically to varying vibration frequencies, particularly high-frequency vibrations that open-loop hydraulic systems cannot address.
2Object-affected harmful factors
If active compensation with electric motor and sensors is added, then high-frequency vibration attenuation is achieved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a unified active suspension system. The electromagnetic actuator serves both as a sensor (detecting vibrations through its own motion) and an actuator (applying counteracting forces). The controller handles both low-frequency and high-frequency vibration compensation through a single control algorithm, eliminating the need for separate hydraulic and active systems.
Solution Approach 2:
The patent combines the sensor, controller, and actuator into an integrated active suspension system. The electromagnetic actuator's position sensor provides direct feedback about system state, merging sensing and actuation functions. This consolidation reduces overall system complexity compared to having separate hydraulic damping and active compensation systems.
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 reduces vibrations across a broader frequency range, enhancing ride comfort and reducing operator fatigue by actively damping vibrations that hydraulic systems cannot manage.
Implementation Method 1
A pneumatic shock absorber provides a respective resistance level against movement of the seat with respect to the base based on a corresponding pressure level of air or gas within the pneumatic shock absorber
Implementation Method 2
An electric motor is capable of driving one of the cylindrical members
Implementation Method 3
A first sensor is arranged to detect first sensor data associated with an instantaneous position of the seat versus time
Implementation Method 4
A controller generates at least one of a first control signal for the electric motor to change a height of the seat in opposition to a vibration-induced change in the instantaneous position of the seat
Data Source
AI summary
A suspension system for a seat of a vehicle comprises a base, a linkage, and a seat attached to the base via the linkage. A pneumatic shock absorber provides a respective resistance level against movement of the seat with respect to the base based on a corresponding pressure level of air or gas within the pneumatic shock absorber. A set of cylindrical members are spaced apart beneath the seat. A tension member is arranged to engage the cylindrical members. The tension member is attached to the seat via a bracket. An electric motor is capable of driving one of the cylindrical members. A first sensor is arranged to detect first sensor data associated with an instantaneous position of the seat versus time. A controller generates a first control signal for the electric motor to change a height of the seat in opposition to a change in the instantaneous position of the seat and a second control signal to change the pressure level.