Fault-tolerant measurement method based on double queues

Abstract

The invention belongs to the technical field of automatic control, in particular to a fault-tolerant measurement method based on double queues for external physical quantity. The method is as follows: double queues are adopted for storing measuring data, and measurement is carried out according to methods of effective judgment and compatible judgment. The measurement of the physical quantity is carried out by utilizing a high-accuracy rapid multiple- sampling averaging method so as to eliminate random errors, and improve the measurement accuracy. A measured result is subject to validity judgment before entering the queues, and whether the result is valid is judged according to the set dynamic random error range so as to eliminate the interference of one-time random events. When the interferences of twice random events occur continuously and are recorded by sampling queues, the measuring result enters a candidate queue, and finally a correct measuring result is given. By utilizing the measurement method, the random errors with normal distribution characteristics can be eliminated, the primary random errors can be eliminated, and the physical quantity under the condition of tolerating continuous twice random errors is correctly measured. The method can be widely applicable to measurement of the physical quantity with the dynamic random error characteristic.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a double-queue-based fault-tolerant measurement method for external physical quantities. Background technique [0002] The correct measurement of external physical quantities is the basis for the normal and stable operation of the control system. In practical systems, the measurement of any physical quantity is often accompanied by dynamic random errors and disturbances of random events. These errors and disturbances, if not handled correctly, will lead to erroneous measurement results and control system operation errors. In order to improve the accuracy of physical quantity measurement, three improved measurement methods are mainly used in the existing control system: [0003] The first is to improve the accuracy of the measurement circuit, such as using a higher-precision conversion circuit. This method can effectively improve the accuracy drop caused b...

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Problems solved by technology

However, it is impossible to deal with one-time random events with multiple intervals during the measurement process, and it is even more impossible to rule out the influence of random events occurring twice in a row to obtain correct measurement results.

[0006] The above three improved measurement methods cannot well eliminate the interference of random errors and random events on the measurement process and measurement results

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