Electrohydraulic Control Unit for Damping Non-User Inputs
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Solution Overview
Problem
Existing control mechanisms for electrohydraulic machines are inadequate in distinguishing and mitigating non-user induced inputs, such as joystick oscillations caused by spring-loading and machine shaking, which can lead to unintended and potentially damaging machine operations.
Innovation Solution
A control unit with a monitoring and determination unit to differentiate between user-induced and non-user-induced inputs, generating damped control commands for non-user-induced inputs to prevent machine shaking by analyzing input signal patterns, frequency, and velocity, and adjusting modulation maps to reduce control command magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow rate damping or ramping feature is used to prevent abrupt motion of joystick, then safety is improved, but device complexity increases
Solution Approach 1:
The system changes parameters of the input signal (flow rate, ramping characteristics) to prevent abrupt joystick motion while maintaining simple hardware architecture. The control unit processes signals with damping or ramping features that modify motion parameters without adding complex mechanical structures.
2Measurement precision
If sophisticated control mechanisms are added to distinguish user-induced from non-user-induced inputs, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The control unit monitors joystick position and velocity signals, comparing them against threshold values to distinguish between user-induced and non-user-induced inputs. This feedback mechanism enables precise input differentiation through software-based threshold comparison rather than complex hardware sensors.
Solution Approach 2:
The system replaces complex mechanical sensing mechanisms with electronic signal processing. The control unit uses software algorithms to analyze input signal characteristics (position, velocity, acceleration) and distinguish input types, substituting mechanical complexity with computational logic.
Data Source
AI summary
The present invention refers to a method for generating a control command to at least one actuator of an electrohydraulic machine, comprising a step of receiving and monitoring an input signal provided by a user interface, a step of determining if the monitored input signal is related to a user-induced input or a non-user-induced input, and a step of generating the control command upon processing the input signal in dependence on whether the input signal is a user-induced input or a non-user-induced input.