Vehicle Slope Stability Torque Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicles face instability when operating on sloped surfaces, particularly due to the coupling of steering and balancing control mechanisms, which can lead to uncontrollable movement and loss of balance.
Innovation Solution
A system and method for safely moving electric vehicles up or down a sloped surface, incorporating a propulsion system with a motor drive and controller that adjusts torque to prevent uncontrollable movement, and an assist mechanism to guide the vehicle, allowing for different torque modes to manage ascent and descent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a propulsion system provides torque to prevent uncontrollable movement down a sloped surface, then vehicle stability is improved, but the complexity of the control system increases
Solution Approach 1:
The propulsion system dynamically adjusts torque based on shaft speed monitoring. The motor controller continuously monitors shaft speed and adjusts torque output in real-time to maintain stability on sloped surfaces, transitioning from static to dynamic control to manage the complexity-stability trade-off.
Solution Approach 2:
The system implements feedback control by monitoring shaft speed and using this information to adjust torque provision. The motor controller receives shaft speed feedback and automatically modulates propulsion torque to prevent uncontrollable movement, creating a closed-loop control system that manages stability without requiring overly complex external control mechanisms.
2Measurement precision
If the motor controller monitors shaft speed and adjusts torque dynamically, then vehicle control precision is improved, but the use of energy increases
Solution Approach 1:
The motor controller applies partial torque adjustment rather than maximum continuous torque. By monitoring shaft speed and providing only the necessary torque to maintain stability and prevent uncontrollable movement, the system achieves adequate control precision without excessive energy consumption that would result from continuous maximum torque application.
Solution Approach 2:
The system changes the torque parameter dynamically based on shaft speed conditions. Rather than maintaining constant high torque for precision control, the motor controller adjusts torque levels according to actual operating conditions, achieving sufficient control precision while varying energy consumption to match actual stability requirements.
3Ease of operation
If an assist mechanism is added to enable operator guidance, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The assist mechanism serves multiple functions: it enables operator guidance input, works in conjunction with the propulsion system for controlled movement, and integrates with the existing motor controller infrastructure. By making the assist mechanism multi-functional rather than dedicated to a single purpose, the system achieves improved ease of operation without proportionally increasing overall complexity.
Solution Approach 2:
The assist mechanism acts as an intermediary between the operator and the propulsion system. It translates operator input into controlled torque adjustments through the existing motor controller, providing ease of operation without requiring direct complex coupling between operator input and propulsion control, thus managing system complexity through intermediate control.
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 system effectively prevents vehicles from sliding down slopes and allows controlled movement up or down, enhancing safety and stability by dynamically adjusting torque and using assist mechanisms to guide the vehicle.
Implementation Method 1
A propulsion system provides an amount of torque to the at least one ground contacting element to prevent the vehicle from uncontrollably moving down the sloped surface
Implementation Method 2
The propulsion system provides torque to the at least one ground contacting element to prevent the vehicle from uncontrollably moving down the sloped surface
Implementation Method 3
a motor controller coupled to the motor drive for monitoring a shaft speed of the motor drive and adjusting the amount of torque provided to the at least one ground contacting element
Implementation Method 4
to prevent the vehicle from uncontrollably moving down the sloped surface
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A system and method for safely moving a vehicle up or down a sloped surface is provided. In one embodiment, a method involves operating the vehicle in a sloped surface mode when at least one ground contacting element for moving the vehicle is on the sloped surface. An amount of torque is provided to the at least one ground contacting element to prevent the vehicle from uncontrollably moving down the sloped surface while in the sloped surface mode of operation. An assist mechanism can be coupled to the propulsion system to enable an operator to guide the vehicle.