Active Axle Damping Control with Shared Sensor Feedback
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Solution Overview
Problem
Damping arrangements of active vehicle chassis face challenges in achieving precise control and regulation under highly dynamic loads, which is crucial for maintaining ride comfort.
Innovation Solution
A damping arrangement where both electric motors of the damping systems are connected to a common control device, equipped with position sensors for rotor position detection and pressure sensors for hydraulic pressure measurement, allowing for highly precise regulation and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate control devices are used for each damping system, then device complexity is reduced and ease of manufacture is improved, but measurement precision and control accuracy deteriorate under highly dynamic loads
Solution Approach 1:
The patent merges separate control devices into a single common control device that coordinates both damping systems. This consolidation integrates multiple sensors and control algorithms into one unified system, achieving high measurement precision and control accuracy while managing complexity through modular architecture.
Solution Approach 2:
The common control device performs multiple functions: it controls both damping systems, processes data from multiple position and pressure sensors, coordinates electric motors, and adapts to highly dynamic loads. This multi-functional design eliminates the need for separate control devices while maintaining or improving control precision.
2Measurement precision
If a common control device is used for both damping systems, then measurement precision and control accuracy are improved, but device complexity increases
Solution Approach 1:
The common control device is segmented into modular functional units: position sensor interfaces, pressure sensor interfaces, motor control modules, and coordination algorithms. This segmentation manages complexity by organizing functions into discrete, manageable components while maintaining unified control.
Solution Approach 2:
The control device implements feedback loops that continuously monitor position and pressure sensors, adjust motor commands in real-time, and adapt to dynamic load conditions. This feedback mechanism enables precise control despite the increased complexity of coordinating multiple damping 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
Enables highly accurate and dynamic control of the damping systems, ensuring a high level of ride comfort even under highly dynamic loads by utilizing a common control device with integrated sensors.
Implementation Method 1
a position sensor is respectively associated with each electric motor to detect the rotor position of the respective electric motor
Implementation Method 2
at least one pressure sensor for acquiring a pressure is also associated with each hydraulic pump and is connected to the common control device
Implementation Method 3
a hydraulic pump, which is coupled to hydraulic chambers of the hydraulic piston via hydraulic lines, wherein a movement of the piston in a first actuation direction or in a second actuation direction can be provided depending on the conveying direction of the hydraulic pump
Data Source
AI summary
Damping arrangement of an active chassis for an axle of a vehicle. A damping system cooperates with each wheel. Each of the damping systems has a damper having a double-acting hydraulic cylinder and a piston, a reversible hydraulic pump and an electric motor, and a hydraulic unit having a hydraulic reservoir and valves. The hydraulic pump and the hydraulic unit of the respective damping system cooperate with the hydraulic cylinder thereof such that, dependent upon the conveying direction of the hydraulic pump, a movement of the piston in a first actuation direction or in a second actuation direction can be provided. The electric motors of both damping systems are connected to and drivable by a common control device. A position sensor is associated with each electric motor to acquire the rotor position of the respective electric motor. A pressure sensor is associated with each hydraulic pump to acquire a pressure.