Trailer Yaw Oscillation Probing for Heavy-Duty Stability Control
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Solution Overview
Problem
Existing heavy-duty vehicle combinations face instability issues such as snaking or jack-knifing due to factors like load distribution and size, which modern stability controllers do not fully address, increasing the risk of accidents.
Innovation Solution
A system and method that actively induces oscillations in the trailer by a torque generating component, monitors the response, and determines properties like center of gravity and natural frequencies to enhance safety measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modern stability controllers are used, then some stability is improved, but the risk of accidents due to snaking or jack-knifing is not fully reduced
Solution Approach 1:
The system performs preliminary probing of trailer properties (center of gravity, natural frequencies, mass distribution) before main operations to establish baseline safety parameters. This advance characterization allows the stability controller to be pre-configured with accurate trailer-specific data, enabling more effective prevention of snaking and jack-knifing incidents.
Solution Approach 2:
The system continuously monitors trailer behavior during operation and compares it against the characterized properties. When deviations indicating potential instability are detected, the system provides feedback to the stability controller to adjust control parameters in real-time, thereby reducing accident risk beyond what conventional controllers achieve.
2Reliability
If trailer properties are actively probed during driving, then safety information is improved, but device complexity increases
Solution Approach 1:
The system uses the trailer's own operational movements and existing dynamics during normal driving to generate the probing signals. Instead of requiring external test equipment or separate measurement systems, the trailer's natural responses to steering inputs and road conditions are captured and analyzed to determine its properties, thereby avoiding additional complex hardware.
Solution Approach 2:
The probing system is integrated with the existing stability control and steering systems, allowing these components to serve dual functions: normal vehicle operation and active trailer property probing. The same sensors and actuators used for stability control are utilized to excite and measure trailer responses, eliminating the need for separate dedicated probing equipment.
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
Enhances safety by allowing vehicle controllers to adjust settings based on trailer properties, reducing instability and preventing accidents.
Implementation Method 1
activating the torque generating component and applying a pre-determined control action to the torque generating component so as to excite oscillations of the trailer
Implementation Method 2
at least one detection unit configured to detect the resulting oscillations of the trailer
Data Source
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AI summary
The invention relates to a system for probing properties of a trailer towed by a towing vehicle in a heavy-duty vehicle combination. The system comprises at least one torque generating component for inducing movements of the trailer relative to a yaw axis of the trailer; a control unit configured to, during driving of the vehicle combination, activate the torque generating component and apply a pre-determined control action to the torque generating component so as to excite oscillations of the trailer; and at least one detection unit configured to detect the resulting oscillations of the trailer, wherein the control unit is configured to, based on the detected resulting oscillations, determine one or more properties of the trailer. The invention also relates to a probing method.