Vehicle Seat Angle Trajectory Planning for Roll and Pitch Disturbance Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Payloads supported by rigid suspension systems, such as those in vehicles and heavy machinery, experience significant disturbances due to uneven surfaces, leading to uncomfortable and disruptive movements for occupants, particularly during roll or pitch events.
Innovation Solution
A vehicle seat system with an actuator and controller that generates and scales command signals to adjust the seat's angle relative to the vehicle floor, actively isolating the payload from disturbances by smoothly transitioning to and from a maximum command angle, preventing interference with the vehicle's interior, and maintaining a stable position for the occupant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid suspension system is used to support the payload, then the structural strength and stability are improved, but the payload experiences significant disturbances and uncomfortable movements during vehicle roll or pitch events
Solution Approach 1:
An active suspension system with actuators is introduced as an intermediary between the rigid vehicle frame and the payload (seat). The actuator generates counteracting forces to compensate for vehicle roll and pitch movements, isolating the payload from disturbances while maintaining structural support.
Solution Approach 2:
The suspension system dynamically changes its stiffness and damping parameters in real-time based on vehicle motion conditions. The controller adjusts actuator output to modify the mechanical properties of the suspension, providing optimal isolation during roll/pitch events while maintaining structural integrity.
2Object-affected harmful factors
If the command signal is scaled to prevent the seat from exceeding a limit, then the seat avoids interference with the vehicle interior, but the transition to maximum command angle must be progressive and smooth
Solution Approach 1:
The command signal scaling is dynamically adjusted based on the current seat angle and the rate of change of the vehicle's roll angle. The system transitions progressively to the maximum command angle by modulating the actuator output, ensuring smooth motion without abrupt changes that would cause discomfort or interference.
Solution Approach 2:
The controller continuously monitors the seat angle and vehicle motion, using feedback to adjust the command signal in real-time. This closed-loop control ensures the seat transitions smoothly to and from the maximum command angle while preventing interference with the vehicle interior.
3Object-affected harmful factors
If an active suspension system with scaling is implemented, then the payload isolation and comfort are improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical suspension mechanisms with an active control system using actuators and electronic controllers. This substitution achieves superior payload isolation with reduced mechanical complexity by using electronic sensing and actuation instead of passive mechanical components.
Data Source
AI summary
Systems and methods for controlling movement of an active payload support system. In one example, a seat system for a vehicle includes a seat, a support structure coupled to the seat and including an actuator configured to move the seat at a command angle relative to a floor of the vehicle responsive to movement of the vehicle, at least one sensor positioned to detect movement of the vehicle, and a controller configured to receive a signal from the at least one sensor, generate a command signal to instruct the actuator to move the seat relative to a floor of the vehicle, determine whether the command signal will cause the seat to exceed a limit, scale the command signal to conform to movement of the vehicle within the limit, and provide a force command to the actuator to move the seat based on the scaled command signal.