Lift Rope Acceleration Control for Impact Vibration Prevention
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Solution Overview
Problem
Existing hoisting systems face impact vibrations due to the inability to timely adjust the time-varying simulation parameter of acceleration when the weight of loads in the hoisting container changes, leading to potential damage and safety threats.
Innovation Solution
A method and device that acquire the load weight, determine the fundamental wave vibration period of the hoisting ropes, and adjust the time-varying simulation parameter of acceleration based on preset basic and calculation parameters, including self-weight, hoisting height, rope properties, and expected speed, to control the hoisting process effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed time-varying simulation parameter of acceleration is used for hoisting, then the control method is simple, but the system cannot timely regulate the acceleration parameter when load weight changes, causing impact vibration
Solution Approach 1:
The patent transforms the fixed acceleration simulation parameter into a dynamic parameter that changes with load weight. The control device calculates and adjusts the acceleration simulation parameter in real-time based on the actual load weight detected by the weighing device, making the system adaptive to different loading conditions and preventing impact vibrations without requiring overly complex control algorithms.
Solution Approach 2:
The patent implements a feedback mechanism where the weighing device continuously monitors the load weight in the hoisting container and feeds this information back to the control device. The control device then adjusts the acceleration simulation parameter based on this feedback, creating a closed-loop control system that automatically adapts to weight changes and prevents impact vibrations.
2Reliability
If the acceleration parameter is adjusted according to load weight changes, then impact vibration is prevented, but the control system becomes more complex
Solution Approach 1:
The control device performs multiple functions: it not only controls the hoisting speed and acceleration but also calculates the fundamental wave vibration period of the hoisting ropes, determines the optimal acceleration simulation parameter, and adjusts control signals based on load weight. By integrating these functions into a single control device, the patent avoids the need for separate complex systems while achieving impact vibration prevention.
Solution Approach 2:
The patent changes the acceleration parameter based on load weight by calculating the fundamental wave vibration period of the hoisting ropes and adjusting the acceleration simulation parameter accordingly. This parameter change approach allows the system to adapt to different loading conditions and prevent impact vibrations through mathematical relationships rather than complex mechanical adjustments.
3Ease of operation
If a fixed hoisting method is used, then the operation is simple, but equipment may be damaged due to impact vibration when load weight changes
Solution Approach 1:
The patent applies preliminary action by pre-calculating the fundamental wave vibration period of the hoisting ropes and establishing the relationship between load weight and optimal acceleration simulation parameter. The control device uses these pre-established mathematical relationships to quickly determine the appropriate acceleration parameter when load weight changes, preventing impact vibrations before they can damage equipment while maintaining simple operation.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with a computational approach. Instead of using mechanical devices to physically adjust hoisting parameters based on load weight, the system uses the control device to calculate the optimal acceleration simulation parameter and send electronic control signals to the drive device, simplifying the mechanical structure while improving equipment protection.
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
Prevents damage from impact vibrations by dynamically adjusting the acceleration parameter, thereby prolonging the service life of the hoisting system and ensuring safety.
Implementation Method 1
a fundamental wave vibration period of hoisting ropes when the hoisting system is started is determined according to the load weight in the hoisting container and the preset hoisting system basic parameter
Implementation Method 2
a fundamental wave vibration period of hoisting ropes when the hoisting system is started is determined according to the load weight in the hoisting container and the preset hoisting system basic parameter
Data Source
AI summary
A method and device for preventing impact vibration of a lift system include: acquiring a load weight in a lift container; obtaining preset basic parameters of a lift system; according to the load weight in the lift container and the basic parameters of the lift system, determining a fundamental wave vibration period of a lifting rope when the lift system starts; according to the fundamental wave vibration period and preset calculation parameters of the lift system, determining time-varying simulation parameters of an acceleration of the lift system during a lifting process; according to determined time-varying simulation parameters of the acceleration, lifting the lift container.