Light Transit Bogie Layout for Low Weight and NVH Isolation
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Solution Overview
Problem
Existing bogies for light mass transit vehicles are high in mass and weight, leading to inefficiencies in space, energy consumption, and stability, while also failing to provide adequate isolation from noise, vibration, and harshness (NVH) and collision avoidance.
Innovation Solution
A bogie design with a flexible coupling, centrally mounted transmission, and brake assembly, incorporating a suspension system with air springs and electrical induction brakes, along with geo-positional determination and LIDAR for autonomous operation and collision avoidance, allowing for reduced size, weight, and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-mass components are used to provide structural strength and support, then the bogie can support the vehicle body and provide stability, but the weight of the bogie increases leading to energy inefficiency and reduced space efficiency
Solution Approach 1:
The bogie frame is constructed using composite materials that provide high strength-to-weight ratio, enabling the structure to support vehicle body loads while significantly reducing overall bogie weight compared to traditional solid metal constructions
Solution Approach 2:
The bogie is divided into modular functional portions (first portion for drive system, second portion for brake system) that can be independently optimized and mounted, allowing selective placement of mass-critical components while maintaining overall structural integrity
2Area of stationary object
If components are densely packaged within the bogie frame, then space efficiency is improved, but isolation of functional parts from NVH and damage becomes more difficult
Solution Approach 1:
The bogie is segmented into distinct functional portions with the drive system in the first portion and brake system in the second portion, spaced apart by the suspension system which acts as a physical barrier to NVH transmission between components
Solution Approach 2:
The suspension system serves as an intermediary element between the drive system and brake system portions, providing both mechanical connection for structural support and acoustic/vibration isolation to protect functional parts from NVH
3Power
If traditional bogie designs are used, then basic tractive function is provided, but autonomous operation, geo-positioning and collision avoidance capabilities are not achieved
Solution Approach 1:
The bogie is designed as a multi-functional platform that combines traditional tractive power delivery with integrated autonomous operation systems including geo-positioning receivers, LIDAR sensors, and control systems, enabling both propulsion and autonomous navigation functions from a single integrated structure
Solution Approach 2:
The bogie incorporates preliminary positioning systems (geo-positioning receivers and LIDAR) that continuously gather environmental and positional data before autonomous decision-making is required, enabling proactive collision avoidance and precise positioning actions
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 design achieves a more space-efficient, durable, and energy-efficient bogie with enhanced stability and NVH reduction, enabling autonomous operation and precise positioning for self-driven movement and collision avoidance.
Implementation Method 1
A bogie design with a flexible coupling, centrally mounted transmission, and brake assembly, incorporating a suspension system with air springs
Implementation Method 2
The bogie may have means for LIDAR ranging and positioning relative to the vehicle and/or other bogie along with collision avoidance
Implementation Method 3
The second portion of the bogie support frame may include an electrical induction brake
Data Source
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AI summary
An aspect provides a bogie for a vehicle, including: a bogie support frame including a first portion and a second portion, the first portion being mountable to the vehicle body; a suspension system connecting the first portion and second portion; at least one wheelset mounted on the second portion, each wheelset including two or more wheels mounted on a wheel axle; and an actuator for providing torque to the two or more wheels, wherein upon the first portion of the bogie support frame the actuator. The bogie allowing independent operation in terms of movement as well as positioning and collision avoidance with sensors for macro positioning such as GPS, micro positioning such as by LIDAR and for dynamic anti-collision monitoring such as RADAR. i