Pump Truck Boom Vibration Suppression via Dynamic Current Control
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Solution Overview
Problem
Vibration in the revolution direction of boom structures on pump trucks, such as concrete pump trucks, poses safety risks and reduces operational efficiency, as existing methods for vibration suppression are either time-consuming, labor-intensive, or introduce safety hazards.
Innovation Solution
A vibration suppression method and system that detects the vibration severity of the boom, extracts dynamic characteristic parameters, calculates a control signal to compensate for the vibration, and drives a revolving actuator to move accordingly, using a controller with an input module, processing module, and control module to effectively reduce boom vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the pumping gear is shifted down to decrease the pumping rate and pumping efficiency, then the vibration of the boom is reduced, but the productivity and construction period are negatively affected
Solution Approach 1:
The patent changes the operating parameters of the revolving mechanism by adjusting the current waveform from a standard square wave to a sloped square wave with controlled rising and falling edges. This parameter change allows the system to suppress boom vibration while maintaining normal pumping efficiency, resolving the contradiction between vibration reduction and productivity.
2Object-affected harmful factors
If the form of operating current of the revolving mechanism is changed to sloped square wave to buffer vibration, then the vibration is reduced, but the revolving operation time is increased and safety hazards remain
Solution Approach 1:
The patent makes the current waveform dynamic by adjusting the slope rates of the sloped square wave in real-time based on the operating conditions. The controller can dynamically modify the rising and falling edge characteristics to achieve vibration suppression while maintaining efficient revolving operation timing, avoiding the time loss and safety issues associated with fixed sloped waveforms.
3Object-affected harmful factors
If the slope rate of the operating current is increased to buffer vibration, then the vibration suppression is improved, but the boom revolves further than intended creating safety hazards
Solution Approach 1:
The patent implements a feedback control system where the controller monitors the actual position and vibration state of the boom, then adjusts the slope rates of the operating current in real-time. This closed-loop feedback ensures that the boom stops at the intended position without overshooting, maintaining both vibration suppression and operational safety.
Data Source
AI summary
A revolution vibration suppressing method and apparatus for pump truck boom is provided. Vibration severity of the boom in the revolution direction is detected. Dynamic characteristic parameters of the boom are extracted. A control signal that can be used to control the revolving actuator to compensate the vibration severity according to the vibration severity and the dynamic characteristic parameters is calculated. The revolving actuator is driven according to the control signal to move, to suppress the revolution vibration of the boom. A revolution vibration suppression controller and a revolution vibration suppression device for a pump truck boom are provided to implement the methods. With the disclosed methods and apparatus, the vibration of a pump truck boom in the revolution direction can be suppressed, and therefore the risk of failures of the boom is decreased and the operating safety in the work is improved.