Multi-Motor VR Treadmill Inertia Control
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Solution Overview
Problem
Treadmill-based virtual reality systems face issues such as unrealistic experiences due to inertia, lack of dynamic speed control, and the risk of users falling off, especially when changing speeds or navigating different virtual surfaces.
Innovation Solution
The system employs multiple motors coupled to a user interface surface, which assist in overcoming inertia, dynamically control speed, and simulate various virtual surfaces by generating feedback electrical signals and varying voltage inputs based on user movement and virtual reality content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single motor is used to drive the treadmill, then the device complexity is low, but the realism of virtual reality experience deteriorates due to inertia effects
Solution Approach 1:
The system divides the single motor function into multiple motors (first motor coupled to the treadmill for generating feedback signals, second motor coupled to the user for providing assistance). This segmentation allows each motor to perform specific functions, reducing inertia effects and improving realism while maintaining manageable complexity through specialized roles.
Solution Approach 2:
The first motor acts as an intermediary between the user's movement and the control system, generating feedback electrical signals that inform the virtual reality environment of the user's motion. This intermediary mechanism enables realistic virtual ground effects without requiring the second motor to directly sense user movement.
2Reliability
If no dynamic speed control is implemented, then the ease of operation is high, but the safety deteriorates as users may fall off when moving too fast or too slow
Solution Approach 1:
The first motor generates feedback electrical signals in response to the treadmill's movement, which are processed by the virtual reality component to monitor user speed. This feedback loop enables automatic speed regulation, preventing users from moving too fast or too slow, thereby improving safety while maintaining ease of operation through automated control.
Solution Approach 2:
The system dynamically adjusts the treadmill's operation based on real-time feedback from the motors and virtual reality component. The second motor provides variable assistance to help users overcome inertia during acceleration and deceleration, enabling smooth speed transitions and preventing unsafe operating conditions without requiring manual intervention.
3Reliability
If the treadmill does not assist with inertia, then the device complexity is low, but the realism of virtual reality experience deteriorates when users begin or stop walking
Solution Approach 1:
The second motor is positioned to provide preliminary assistance before the user needs to overcome inertia. When the user begins or stops walking, the second motor proactively provides force to counteract inertia effects, creating a more realistic experience. The motor's assistance is timed to match the user's movement phase, improving realism without requiring complex real-time calculation.
Solution Approach 2:
The second motor changes its operational parameters (force output, activation timing) based on the user's movement state. During acceleration and deceleration phases, the motor adjusts its assistance level to match the changing inertia requirements, providing realistic ground effects while maintaining simple control through predefined parameter adjustments.
4Adaptability or versatility
If the treadmill surface does not simulate different surfaces, then the device complexity is low, but the adaptability to different virtual environments deteriorates
Solution Approach 1:
The motor system is designed with multi-functionality to handle various surface simulation requirements. The same first and second motors that provide basic inertia compensation also generate feedback signals for different surface types (snow, sand, ice, etc.) by varying their operational characteristics. This universality allows the system to adapt to different virtual environments without adding dedicated mechanisms for each surface type.
Solution Approach 2:
The feedback electrical signals from the first motor are processed by the virtual reality component to determine appropriate surface simulations. Based on this feedback, the system adjusts motor parameters to simulate different surface characteristics, enabling adaptability to various virtual environments while maintaining a relatively simple hardware configuration through software-based surface differentiation.
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
This solution provides a more realistic virtual reality experience by enhancing user interface surface control, preventing falls, and simulating diverse virtual environments, thereby improving user immersion and safety.
Implementation Method 1
A first motor of the multiple motors is driven by movement of the user interface surface and is used to generate a feedback electrical signal in response to the movement of the user interface surface
Implementation Method 2
A second motor of the multiple motors is driven using the feedback electrical signal
Implementation Method 3
The source may be a voltage source and the virtual reality component may be adapted to vary the input electrical signal by cyclically changing a voltage applied to the third motor
Data Source
AI summary
One or more embodiments of the present disclosure include a system for providing dynamic virtual reality ground effects. The system includes a user interface surface and multiple motors coupled to the user interface surface. At least one of the motors is coupled to a virtual reality component of an electronic device. A first motor of the multiple motors is driven by movement of the user interface surface and is used to generate a feedback electrical signal in response to the movement of the user interface surface. A second motor of the multiple motors is driven using the feedback electrical signal.