Differential Wheel Braking for Mobile Medical Apparatus Cornering
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Solution Overview
Problem
Conventional automated braking systems for mobile medical apparatuses with differential drive cause unpleasant and unsafe twisting behavior when traveling around corners due to simultaneous braking of both drive wheels, especially in heavier vehicles.
Innovation Solution
The method independently controls the braking of the drive wheels by determining and applying different braking quantities based on their speeds to ensure simultaneous stoppage, minimizing twisting behavior and enhancing user safety and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If both drive wheels are braked simultaneously with maximum deceleration, then the braking distance is minimized, but the vehicle exhibits twisting behavior that is perceived as unsafe and unpleasant
Solution Approach 1:
The patent applies different braking quantities to different wheels based on their individual speeds. The control unit determines a first braking quantity for the first drive wheel and a second braking quantity for the second drive wheel, where at least one braking quantity differs from the other. This local differentiation prevents the symmetric twisting behavior caused by uniform maximum braking on both wheels, while still achieving effective braking.
Solution Approach 2:
The patent dynamically adjusts the braking parameters (braking quantities) based on the current operational state, specifically the speed difference between the two drive wheels. By changing the braking quantity parameters individually for each wheel rather than applying a fixed maximum braking force to both, the system eliminates twisting behavior while maintaining short braking distances.
2Stability of the object's composition
If independent braking control is implemented to prevent twisting behavior, then vehicle stability is improved, but control software complexity increases
Solution Approach 1:
The control system automatically determines and applies appropriate braking quantities for each wheel based on their speed differences, without requiring complex external intervention or manual adjustment. The system self-regulates the braking force distribution to prevent twisting, achieving stability through an autonomous control logic that, while sophisticated, operates transparently to the user.
Solution Approach 2:
The patent implements a dynamic braking control system that continuously monitors wheel speeds and adjusts braking quantities in real-time based on the detected speed difference. This dynamic adaptation allows the system to maintain vehicle stability during cornering and turning maneuvers by automatically compensating for asymmetric wheel conditions, rather than relying on static pre-programmed braking patterns.
Data Source
AI summary
One or more example embodiments relates to a method for braking a mobile medical apparatus having a first and second wheel, the method comprising determining a first wheel speed for the first wheel and a second wheel speed for the second wheel; determining a first braking quantity for the first wheel and a second braking quantity for the second wheel, the first braking quantity describing a strength with which the first wheel is braked and the second braking quantity describing a strength with which the second wheel is braked, wherein a smaller braking quantity is determined for a wheel with a lower wheel speed than for a wheel with a higher wheel speed among the first wheel and the second wheel; and applying the first braking quantity and the second braking quantity to brake the first wheel and the second wheel.