Built-in testing design method based on relevance model
A correlation model and test design technology, applied in the field of testability, can solve problems such as high product system complexity, design redundancy, and difficulty in assigning fault mode detection and isolation methods
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[0041] Example
[0042] The object selected in this case is the rotary transformer excitation generating circuit. This circuit is used to generate the sine signal required by the excitation winding of the resolver, and provide excitation for the operation of the resolver, so as to realize the detection requirements of the motor position in the control system of the aviation permanent magnet synchronous motor and the brushless DC motor. The functional block diagram of the circuit is as figure 1 Shown.
[0043] Based on the functional structure of the resolver excitation circuit, the test modeling software is used to test the circuit, and the correlation model is obtained as figure 2 As shown, the testability model includes a total of six functional modules: power supply module, sinusoidal signal generation, frequency control command digital-to-analog conversion, frequency control command output module, amplitude adjustment module, and drive capacity adjustment module. There are a ...
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