Distributor Linkage Hydraulic Control for Vibration Damping
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Solution Overview
Problem
Existing agricultural devices with large distributor linkages experience vibrations due to uneven terrain, leading to inconsistent material spread and ineffective damping systems that fail to account for actual pressure differences, resulting in continuous control errors.
Innovation Solution
A control and regulation system that determines the actual pressure offset using sensor signals, processes them with a low-pass filter to extract the quasi-static component, and adjusts hydraulic devices to compensate for dynamic vibrations, ensuring precise damping and maintaining the distributor linkage's target position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed pressure offset value is used in the control system, then the system structure is simple, but the vibration damping precision deteriorates because the fixed value does not reflect actual operating conditions
Solution Approach 1:
The patent transforms the static fixed pressure offset into a dynamic value that changes with operating conditions. The control system continuously monitors actual operating parameters (speed, position, load) and adjusts the pressure offset in real-time, allowing the system to adapt to varying field conditions while maintaining precise vibration damping control
Solution Approach 2:
The patent implements a feedback mechanism where the control system continuously monitors actual operating conditions and uses this information to adjust the pressure offset. Sensors detect parameters such as distributor linkage position, travel speed, and hydraulic pressure, feeding this data back to the control unit which then optimizes the pressure offset value to match current operating conditions
2Productivity
If the distributor linkage working width is increased to 40 m for efficient field coverage, then productivity is improved, but vibration forces increase causing material distribution uniformity to deteriorate
Solution Approach 1:
The patent uses the hydraulic cylinder system to generate counteracting forces that balance the vibration forces acting on the distributor linkage. The actuators apply compensating forces in opposition to the vibration-induced forces, effectively canceling out the destabilizing effects and maintaining material distribution uniformity even at full 40 m working width
Solution Approach 2:
The patent dynamically changes hydraulic pressure parameters to counteract vibration effects. By adjusting pressure in real-time based on detected vibration amplitude and frequency, the system modifies the stiffness and damping characteristics of the hydraulic actuators, enabling stable material distribution across the entire 40 m working width despite varying vibration conditions
3Force
If hydraulic actuators are used to dampen vibrations, then vibration damping capability is improved, but pressure differences occur in the cylinders due to vibrations affecting control precision
Solution Approach 1:
The patent introduces intermediate pressure sensing elements and compensation mechanisms that mediate between the high-force vibration damping function and precise measurement requirements. Differential pressure sensors and compensation circuits filter out vibration-induced noise while capturing the true pressure offset signal, enabling accurate measurement even during active vibration compensation
Solution Approach 2:
The patent applies preliminary compensation for expected pressure variations caused by vibrations. The control system anticipates vibration-induced pressure fluctuations and pre-adjusts the measurement reference or applies correction factors based on detected vibration patterns, ensuring accurate pressure offset determination before vibrations can corrupt the measurement
Data Source
AI summary
A control and/or regulating system for an agricultural device includes a distributor linkage for spreading material, such as fertilizer, pesticide or seed, which extends transversely to the direction of travel and has a central part and two lateral arms connected to the central part with a plurality of arm sections which are foldable in towards one another in the transport position and foldable out in the working position and are connected by joints. At least one hydraulic device is associated with each arm. The hydraulic device comprises a hydraulic. The control and/or regulating system comprises a sensor device configured to detect a pressure change occurring at the respective hydraulic and a data processing unit configured to process signals of the sensor device and, on the basis thereof, to generate a control signal for the respective hydraulic device.