Active Suspension Torque Balancing for Vehicle Stability
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Solution Overview
Problem
Existing motor vehicle suspensions face challenges in preserving components from wear and improving operational effectiveness, particularly in maintaining stability and reducing driver perception of imbalances during maneuvers.
Innovation Solution
An active suspension system with a control unit that applies balanced forces to the wheels to maintain static equilibrium, compensating for wheel movements and torques during steering and parking maneuvers, using actuators and springs to adjust the position of the sprung mass relative to the unsprung mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional suspensions are used, then the structure is simple, but component wear increases and operational effectiveness decreases
Solution Approach 1:
The suspension system transitions from a static, passive configuration to a dynamic, active system where the control unit continuously adjusts suspension parameters based on real-time vehicle conditions, steering angle, and road information to optimize component loading and reduce wear
Solution Approach 2:
The system incorporates feedback mechanisms where the control unit receives information about vehicle state, steering maneuvers, and road conditions, then adjusts suspension forces accordingly to maintain optimal operation and reduce component stress during maneuvers
2Stability of the object's composition
If conventional suspensions are used, then the system is easy to operate, but stability and driver comfort during maneuvers deteriorate
Solution Approach 1:
The control unit performs preliminary adjustments to suspension forces based on anticipated maneuvers (detected via steering angle sensors and road condition data) before the driver actually experiences imbalances, proactively maintaining vehicle stability and comfort
Solution Approach 2:
The active suspension system applies counterbalancing forces to compensate for imbalances generated during steering and parking maneuvers, effectively neutralizing the harmful effects and maintaining driver comfort and vehicle stability
3Productivity
If active suspension with force generation system is added, then operational effectiveness improves, but device complexity increases
Solution Approach 1:
The active suspension system performs multiple functions simultaneously: it maintains vehicle stability, reduces component wear, improves driver comfort, and enables alternative maneuvering modes, thereby achieving high operational effectiveness across diverse operating conditions
Solution Approach 2:
The system replaces traditional mechanical suspension adjustment mechanisms with electronically controlled force generation systems, allowing for more precise and adaptable control while reducing mechanical wear and improving responsiveness
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 maintains the vehicle's static equilibrium, reducing driver-perceived imbalances and enhancing stability by balancing torques and forces, thus improving the operational efficiency and comfort of the vehicle.
Implementation Method 1
the stem carries a piston that cooperates in a fluid-dynamic manner with a fluid contained in the casing, thus damping the relative movements between the stem and the casing
Implementation Method 2
The suspensions usually include a spring and a shock absorber
Implementation Method 3
the suspension arm follows the movement of the wheel with which it is coupled. Therefore, the movements of the wheel due to the contact with the road are transmitted to the suspension arm resulting in a relative movement between the stem and the casing, which is damped
Data Source
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AI summary
A control method for controlling a motor vehicle (1) with a sprung mass, an unsprung mass comprising a plurality of wheels (3FL, 3FR, 3RL, 3RR), an active suspension assembly (4) for suspending the sprung mass with respect to the unsprung mass and controllable to apply for each of the wheels (3FL, 3FR, 3RL, 3RR) of the motor vehicle (1) a corresponding force; said control method includes a control of the active suspension assembly (4) for applying a first compression force for a first wheel (3FL) of said wheels (3FL, 3FR, 3RL, 3RR), applying a first extension force for a second wheel (3FR) of said wheels (3FL, 3FR, 3RL, 3RR), the second wheel (3FR) being aligned with the first wheel (3FL) according to a pitch axis (Y) of the motor vehicle (1), applying a second extension force for a third wheel (3RL) of said wheels (3FL, 3FR, 3RL, 3RR), the third wheel (3RL) being aligned with the first wheel (3FL) according to a roll axis (X) of the motor vehicle (1), and applying a second compression force for a fourth wheel (3RR) of said wheels (3FL, 3FR, 3RL, 3RR), the fourth wheel (3RR) being aligned with the second wheel (3FR) according to the roll axis (X) and with the third wheel (3RL) according to the pitch axis (Y), wherein the first compression force and the first extension force have the same first modulus, just as the second compression force and the second extension force have the same second modulus and are applied simultaneously to each other and simultaneously to the first compression force and to the first extension force, the first and the second modulus being such as to balance a resultant torque due to the control of the active suspension assembly (4) about the roll axis (X).