Hydraulic Oil Heating Control for Cold-Region Unmanned Steering
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Solution Overview
Problem
In cold regions, the viscosity of hydraulic oil in unmanned vehicle systems increases with decreasing temperature, leading to reduced responsiveness of hydraulic systems, particularly affecting the steering device, which in turn decreases the following performance of the unmanned vehicle along its travel course.
Innovation Solution
An unmanned vehicle control system that includes a determination unit to assess the need for heating hydraulic oil, a vehicle receiver to process heating commands, and a heating processor to execute the heating process, ensuring the hydraulic oil's viscosity remains optimal for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the unmanned vehicle operates in cold regions, then the vehicle can function in wide-area work sites, but the hydraulic oil viscosity increases and steering responsiveness decreases
Solution Approach 1:
The system performs preliminary heating of the hydraulic oil before the vehicle operates in cold conditions. The heating processor activates heating elements to warm the hydraulic oil in advance, ensuring optimal viscosity and responsiveness before steering operations begin, thereby preventing the responsiveness degradation that would occur in cold temperatures
2Temperature
If the hydraulic oil temperature is lowered in cold regions, then the vehicle can operate in cold environments, but the viscosity increases and following performance decreases
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor hydraulic oil temperature and feed this information back to the control unit. Based on the feedback, the control unit adjusts the heating processor output to maintain the hydraulic oil temperature within an optimal range, ensuring consistent following performance regardless of ambient cold conditions
3Object-affected harmful factors
If the viscosity of hydraulic oil increases due to low temperature, then the hydraulic system can operate in cold regions, but the steering responsiveness and following performance decrease
Solution Approach 1:
The system changes the physical parameter of hydraulic oil temperature through active heating. By controlling the hydraulic oil temperature to remain above a threshold value, the system maintains optimal viscosity characteristics, thereby preserving steering responsiveness and following performance even when operating in cold environmental conditions
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 effectively suppresses the decrease in following performance of the unmanned vehicle by maintaining optimal hydraulic oil viscosity, thereby enhancing the vehicle's steering responsiveness and overall travel performance in cold conditions.
Implementation Method 1
a heating processor that executes a heating process of the hydraulic oil based on the heating command
Data Source
AI summary
An unmanned vehicle control system includes: a determination unit that determines whether or not to output a heating request for a hydraulic oil based on hydraulic oil data supplied to a hydraulic actuator disposed in an unmanned vehicle and operated by the hydraulic oil; a vehicle receiver that receives a heating command for the hydraulic oil generated based on the heating request; and a heating processor that executes a heating process of the hydraulic oil based on the heating command.