Fault diagnosis method and device for service robot motion system based on time series features

A technology for robot motion and system failure, which is applied in measurement devices, neural learning methods, and testing of machine/structural components. Improve and other issues to achieve the effect of ensuring authenticity and improving accuracy

Active Publication Date: 2020-06-09
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The diagnosis model only extracts features from the fault data at a single moment, ignoring the time series characteristics of the fault data, making the training samples cover insufficient information, resulting in the failure to further improve the accuracy of system fault diagnosis

Method used

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  • Fault diagnosis method and device for service robot motion system based on time series features
  • Fault diagnosis method and device for service robot motion system based on time series features
  • Fault diagnosis method and device for service robot motion system based on time series features

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Embodiment 1

[0039] figure 1 It is a flowchart of a method for diagnosing faults in the kinematic system of a service robot based on time series features in this embodiment.

[0040] Such as figure 1 As shown, a time-series feature-based service robot motion system fault diagnosis method in this embodiment includes:

[0041] S101: Generating time series training samples in a sliding window manner for the original data.

[0042] Wherein, the raw data includes velocity, angular velocity and acceleration.

[0043] Different from the BP neural network, the neural network model based on time series has certain requirements on the format of the input data. The BP neural network only needs to concatenate the characteristic data into a vector and directly input it into the model. The neural network based on time series needs to input the characteristic data within a period of time into the model. The feature dimension is one more time dimension than the BP neural network. .

[0044] The speci...

Embodiment 2

[0084] Such as Figure 4 As shown, a time-series feature-based service robot motion system fault diagnosis device in this embodiment includes a cloud server and a robot-side detection device;

[0085] The cloud server includes:

[0086] A training sample generation module, which is used to generate time series training samples in the form of a sliding window to the original data; wherein, the original data includes velocity, angular velocity and acceleration;

[0087] A fault feature selection module, which is used to perform weighted fusion using multiple random forest models and multiple gradient boosting tree models to form a random model, and use the random model to select fault features from training samples;

[0088] The fault classification module is used to input the selected fault feature data into the GRU neural network, extract the time series features of the fault, input the data at the last moment of the sliding window into the BP neural network, extract the faul...

Embodiment 3

[0100] This embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the following figure 1 The steps in the service robot kinematic system fault diagnosis method based on time series features are shown.

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Abstract

The present disclosure provides a fault diagnosis method and device for a motion system of a service robot based on time series features. Among them, a service robot motion system fault diagnosis method based on time series features, including: using sliding window to generate time series training samples for the original data; using multiple random forest models and multiple gradient boosting tree models for weighted fusion to form random module, using the random model to select fault features from the training samples; input the selected fault feature data into the GRU neural network to extract the time series features of the fault, input the data at the last moment of the sliding window into the BP neural network, and extract the current Time-to-time fault features, after fusing time-series features and current-time fault features, fault classification is performed.

Description

technical field [0001] The disclosure belongs to the field of fault diagnosis of robots, and in particular relates to a method and device for fault diagnosis of a motion system of a service robot based on time series features. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] With the development of artificial intelligence and Internet of Things technology, service robots have made great breakthroughs in terms of software and hardware resource allocation and function realization. Service robots have powerful functions and rich application scenarios, which provide great convenience for people's lives. However, it is very difficult to popularize service robots now. On the one hand, the reason is that the product intelligence level is not enough, and on the other hand, the reason is that the product safety is low. [0004] In recent years, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G06K9/62G06N3/04G06N3/08
CPCG01M13/00G06N3/084G06N3/045G06F18/24323
Inventor 周风余郭仁和袁宪锋梁姣万方沈冬冬王淑倩
Owner SHANDONG UNIV
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