Variable Hydraulic Swing Brake Control for Slope Positioning
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Solution Overview
Problem
Conventional machines face challenges in accurately controlling swing components on slopes due to sensor failures, leading to excessive torsional loading and component failure, as existing systems fail to provide reliable position estimation and variable torque control.
Innovation Solution
A mechanical swing brake variable control system that uses IMUs and sensor fusion to monitor machine roll angle, linkage configuration, and operator inputs, applying variable hydraulic pressure to adjust holding torque based on slope and component inertia, reducing torque when grounded and increasing it on slopes to prevent drift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a hydraulic swing system with mechanical braking is used to prevent swing component drift on slopes, then positioning accuracy is improved, but excessive torsional loading on swing drive components occurs leading to component failure
Solution Approach 1:
The patent applies dynamics by transitioning from a static mechanical brake system to a dynamic hydraulic swing system that can continuously adjust holding torque based on real-time sensor feedback about machine orientation and swing component position, allowing the system to maintain positioning accuracy while adapting torque levels to prevent excessive loading
Solution Approach 2:
The patent implements feedback through sensors that continuously monitor machine roll angle, swing component position, and hydraulic system pressure, feeding this information back to the control system which adjusts hydraulic pressure to maintain precise positioning while preventing excessive torsional loading on drive components
2Measurement precision
If sensor fusion with multiple sensors is used to determine machine pose and state, then measurement accuracy is improved, but system complexity increases due to sensor failures and data fusion requirements
Solution Approach 1:
The patent uses an intermediary approach by implementing a controller that acts as a mediator between multiple sensors and the hydraulic swing system, processing sensor data through fusion algorithms and coordinating the hydraulic actuators to achieve precise swing control while managing the complexity of multiple sensor inputs
Solution Approach 2:
The patent applies universality by designing a control system that performs multiple functions: it processes data from various sensors (GNSS, IMU, DMI), determines machine pose and state, calculates required holding torque, and controls hydraulic pressure, thereby managing complexity through a multi-functional integrated controller
3Stability of the object's composition
If conventional mechanical braking is used to hold swing components, then positioning stability is improved, but torsional loading on swing drive components increases causing component failure
Solution Approach 1:
The patent applies hydraulics by replacing conventional mechanical braking with a hydraulic swing system that uses hydraulic pressure to control swing component positioning, allowing for smoother force application and reduced torsional loading while maintaining positioning stability through variable pressure control
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting hydraulic pressure levels based on sensor feedback about machine orientation and swing component position, allowing the system to maintain stable positioning with minimal holding torque and prevent excessive torsional loading on drive components
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
Enables precise control of swing components on slopes, preventing excessive torsional loading and component failure by dynamically adjusting holding torque, ensuring accurate positioning and safe operation.
Implementation Method 1
a mechanical service brake on the machine in order to vary an amount of swing drive holding torque... through friction components of the mechanical service brake interconnected with the upper and lower car bodies
Implementation Method 2
a pressure control device configured to control a variable pressure applied to a mechanical service brake on the machine in order to vary an amount of swing drive holding torque
Implementation Method 3
The signals received from sensors may be indicative of one or more of machine roll angle... A mechanical swing brake variable control system that uses IMUs and sensor fusion to monitor machine roll angle
Data Source
AI summary
A mechanical swing brake variable control system for an earth-moving machine including an upper revolving car body with swing components mounted on the upper revolving car body, a lower traveling car body with traction components mounted on the lower traveling car body, and a mechanical service brake interconnected with the upper and lower car bodies, controls relative rotation between the upper and lower car bodies. A pressure control device controls a variable pressure applied to the mechanical service brake to vary an amount of swing drive holding torque. An electronic controller monitors and processes signals received from sensors associated with the swing components and machine operator commands, and variably controls the amount of holding torque exerted on the upper revolving car body using the mechanical service brake as a function of one or more of machine roll angle, operational configuration of the swing components, inertial mass of the swing components, and machine operator commands.