Actuator Control Device Mechanical Coupling Defect Detection
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Solution Overview
Problem
Existing control devices in closed-loop systems, such as those in internal combustion engines, cannot effectively detect mechanical coupling defects between actuators and actuating elements, especially when the sensor is not directly connected to the actuating element, leading to potential unnoticed damage and increased production costs.
Innovation Solution
A method and apparatus that actuate an actuator with a predetermined control signal, determine the profile of the actuating position read by the sensor, and assess the mechanical coupling's functionality by comparing the determined profile with a predetermined one, allowing for the detection of defects in the mechanical coupling, including parameters like mechanical damping and inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor is not directly connected to the actuating element, then the mechanical coupling complexity is reduced, but the ability to detect mechanical coupling defects is worsened
Solution Approach 1:
The patent implements feedback by continuously monitoring the actuating element's position via the sensor and comparing it with the control signal sent to the actuator. This closed-loop feedback mechanism enables detection of mechanical coupling defects by identifying discrepancies between commanded and actual positions, thereby resolving the contradiction between reduced mechanical complexity and maintained defect detection capability.
Solution Approach 2:
The control device serves as an intermediary that mediates between the actuator and sensor, processing control signals and sensor feedback to detect mechanical coupling defects. This intermediary function allows indirect detection of coupling issues without requiring direct mechanical connection between sensor and actuating element, resolving the contradiction.
2Reliability
If the control device is continuously monitored during operation, then defect detection capability is improved, but the energy consumption is worsened
Solution Approach 1:
The patent employs periodic action by performing mechanical coupling checks at specific intervals or under certain conditions rather than continuously. The control device can activate diagnostic routines periodically or when triggered by specific events, maintaining defect detection capability while reducing overall energy consumption compared to continuous monitoring.
3Measurement precision
If the sensor is directly coupled to the actuating element, then measurement precision is improved, but the ease of manufacture is worsened
Solution Approach 1:
The control device acts as an intermediary that compensates for the indirect sensor connection. By processing control signals and sensor feedback through sophisticated algorithms, the system maintains measurement precision equivalent to direct coupling while simplifying manufacturing and assembly processes.
Data Source
AI summary
A control device may include an actuator for actuating a final control element on a cooling system of an internal combustion engine and a sensor for scanning a position of the final control element. A method for checking the control device may include the steps of triggering the actuator with a predetermined control signal, determining a progression of the control position scanned by the sensor, and determining the functional capability of the mechanical coupling of the actuator to the final control element on the basis of the predetermined control signal and the determined progression.