Motor Jam Detection Using Recursive Filter Response Modeling
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Solution Overview
Problem
Existing motor error detection systems in battery-powered appliances fail to accurately detect jams or overloads due to dynamic motor drive conditions, leading to delayed detection or failure, particularly in systems with reduced torque, and are not well-suited for dynamic motor behavior.
Innovation Solution
An apparatus and method using discrete-time recursive filters to model expected motor behavior, compare it with actual responses, and identify motor errors by dynamically adjusting filter coefficients based on motor input, allowing for real-time detection of jams or overloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-antenna systems are used, then device complexity is reduced, but communication reliability deteriorates due to susceptibility to jamming and fading
Solution Approach 1:
The system divides the communication function across multiple antennas (first antenna and second antenna) instead of using a single antenna. Each antenna can independently transmit or receive signals, and the controller coordinates between them to maintain communication reliability when one antenna experiences fading or jamming conditions.
Solution Approach 2:
The patent combines multiple antennas and their receiving paths into a unified MIMO communication system. The controller merges the signals from multiple antennas through spatial multiplexing or diversity combining techniques to achieve both high data rates and improved reliability against jamming and fading.
2Productivity
If MIMO technology is implemented to improve data rates and reliability, then communication performance is enhanced, but device complexity and power consumption increase
Solution Approach 1:
The system dynamically switches between different transmission modes (single-antenna mode and MIMO mode) based on channel conditions, jamming detection, and power availability. The controller adjusts the operational state of each antenna and receiving path in real-time to optimize the balance between data rate and power consumption.
Solution Approach 2:
The patent changes operational parameters such as the number of active antennas, receiving path selection, and transmission power levels based on detected channel conditions and jamming presence. This allows the system to achieve high data rates when conditions permit while reducing power consumption when resources are constrained.
3Reliability
If multiple receiving paths are added to counteract fading, then communication reliability improves, but device complexity increases
Solution Approach 1:
Each receiving path is designed to serve multiple functions: it can process signals from different antennas, support both single-antenna and MIMO modes, and adapt to various channel conditions. The controller universally manages all receiving paths to provide fading resistance while maintaining system simplicity through unified signal processing architecture.
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AI summary
An apparatus comprising : at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to: model a response of a motor to a drive signal using one or more filters, the one or more filters configured to define a range of expected motor behaviour associated with the drive signal; compare the modelled response with an actual response of the motor to the drive signal; and identify a motor error if the actual response of the motor is outside the range of expected motor behaviour defined by the modelled response.