Boom Retraction Control Using Self-Weight and Pressure Feedback
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Solution Overview
Problem
Existing boom retraction systems in aerial work vehicles consume excessive energy due to high pressure settings and small pilot ratios in balancing valves, leading to reduced battery life and working hours.
Innovation Solution
A control method and system that combines self-weight retraction with pressure retraction, using proportional valves and motors to adjust the speed of boom retraction dynamically, ensuring it remains within a preset speed while minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a high pressure setting value and small pilot ratio are used in the balancing valve to ensure smooth retraction, then retraction stability is improved, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the balancing valve's opening degree variable rather than fixed. The control system dynamically adjusts the opening degree based on real-time feedback from sensors detecting boom position, retraction speed, and system pressure. This allows the system to achieve smooth retraction stability only when needed while minimizing energy consumption during other phases of operation.
Solution Approach 2:
The patent implements feedback control through sensors that continuously monitor boom position, retraction speed, and hydraulic system pressure. This feedback is processed by the control system which automatically adjusts the balancing valve opening degree and motor power output to maintain optimal retraction performance while minimizing energy consumption, resolving the contradiction between stability and energy use.
2Duration of action of moving object
If the capacity of a battery is increased to extend working hours, then working hours are extended, but use cost increases
Solution Approach 1:
The patent applies self-service by enabling the hydraulic system to automatically optimize its own operation. The control system autonomously adjusts motor power output and balancing valve opening based on real-time sensor feedback, optimizing retraction efficiency without requiring larger battery capacity. This self-regulating capability extends working hours by improving energy utilization rather than increasing energy storage.
Solution Approach 2:
The patent changes operational parameters dynamically - specifically adjusting motor power output and balancing valve opening degree based on boom position, retraction speed, and system pressure. These parameter changes optimize energy consumption during retraction operations, extending effective working hours without requiring increased battery capacity, thus avoiding higher equipment costs.
3Ease of operation
If a high pressure is used to open the balancing valve, then retraction smoothness is ensured, but energy consumption of retraction increases
Solution Approach 1:
The patent makes the balancing valve operation dynamic by continuously adjusting its opening degree based on real-time feedback from sensors. Instead of maintaining constantly high pressure, the system adjusts pressure and valve opening to the minimum necessary level for smooth retraction at each moment, significantly reducing energy consumption while maintaining operational smoothness.
Solution Approach 2:
The patent changes the pressure parameter dynamically during retraction operations. The control system monitors retraction speed and boom position, adjusting system pressure and balancing valve opening degree to match actual operational needs. This parameter optimization ensures smooth retraction only when required by actual conditions, minimizing unnecessary energy consumption associated with maintaining high pressure settings.
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 method achieves stable and efficient boom retraction with reduced energy consumption, extending battery life and working hours by optimizing the interaction between self-weight and pressure retraction mechanisms.
Implementation Method 1
retraction of the boom by self-wight
Implementation Method 2
pressure retraction motor
Implementation Method 3
pressure retraction proportional valve
Data Source
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AI summary
Disclosed are a control method and a control system for controlling retraction of a boom, a mechanical device and a storage medium. The control method for controlling the retraction of the boom is applied to a hydraulic system which combines retraction of the boom by self-wight with retraction of the boom by pressure, the hydraulic system includes a pressure retraction motor (7), a pressure retraction proportional valve (6) and a self-weight retraction proportional valve (3) that are sequentially connected. The boom with non-rod cavity is connected to the self-weight retraction proportional valve (3), and the boom with rod cavity is connected to the pressure retraction motor (7) and the pressure retraction proportional valve (6). The control method includes: when the boom is retracted, controlling the self-weight retraction proportional valve (3) to be at a maximum opening; obtaining an actual speed at which the boom is retracted; controlling a rotation speed of the pressure retraction motor (7) to rise or an opening degree of the pressure retraction proportional valve to increase when the actual speed is less than a preset speed; and controlling the rotation speed of the pressure retraction motor (7) to reduce or the opening degree of the pressure retraction proportional valve to decrease when the actual speed is greater than the preset speed.