Manufacturing system task reliability modeling method based on quality state task network
A technology of manufacturing systems and task networks, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as ignoring the dynamic characteristics of manufacturing systems
Active Publication Date: 2016-07-20
BEIHANG UNIV
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Problems solved by technology
Some studies include the quality of manufactured products into the scope of reliability research of manufacturing systems, but still ignore the dynamic characteristics of manufacturing systems
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[0064] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.
[0065] The present invention is a manufacturing system task reliability modeling method based on quality state task network, see image 3 As shown, the steps are as follows
[0066] Step 1 Collect the manufacturing information and related reliability information of the cylinder head of a certain model of four-cylinder diesel engine. Then based on the relationship between the task reliability of the manufacturing system and the product reliability, such as figure 1 , used for quality function deployment to decompose and map key quality characteristics, and identify key processes and production equipment related to the engine cylinder head manufacturing system, as shown in Table 1.
[0067] Table 1. Critical quality characteristics and their manufacturing process information
[0068]
[0069] Step 2 is to analyze possible material quality states ...
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The invention discloses a manufacturing system task reliability modeling method based on a quality state task network. The method comprises the following steps: 1, a correlation between the manufacturing system task reliability and the product reliability is built; 2, the possible quality state of a material after being processed by each related device is analyzed; 3, a manufacturing system quality state task network model is built; 4, the processing ability state distribution and the probability of each related device are analyzed; 5, the manufacturing qualified probability of each related device is estimated; 6, the task decomposes and quantizes the sub task load of each related device; 7, the lower limit for the device processing ability meeting the sub task load requirements is recognized; 8, a sub task reliability model for the related device is built, and a manufacturing system task reliability comprehensive model is built; and 9, a dynamic change curve for the manufacturing system task reliability is analyzed and discussed. The reliability model based on the quality state task network is built, an effective basis is provided for production activities such as production scheduling, quality control and device prevention and maintenance, and the enterprise production benefits and the competitiveness are enhanced.
Description
technical field [0001] The invention provides a method for modeling the task reliability of a manufacturing system based on a quality state task network, which belongs to the technical field of reliability modeling and analysis. Background technique [0002] With the continuous improvement of my country's position in the global manufacturing industry, the pressure and competition it faces are also increasing. As the carrier of product output, a reliable manufacturing system is an important factor to ensure product quality and productivity. In the face of complex manufacturing systems, reliability modeling and analysis methods often focus on the failure of the equipment itself in the manufacturing system, analyze the various failure modes and trends of the failure rate of the equipment, and then guide enterprises to develop Periodic repair and maintenance of targeted equipment. [0003] From the perspective of system engineering, the product is the output of the manufacturi...
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Login to View More IPC IPC(8): G05B19/418
CPCG05B19/41885G05B2219/32339Y02P90/02Y02P90/80
Inventor 何益海谷长超韩笑崔家铭
Owner BEIHANG UNIV