Illumination energy-saving control method based on variable-amplitude and variable-gain gradient extreme value searching algorithm

Abstract

The invention discloses an illumination energy-saving control method based on a variable-amplitude and variable-gain gradient extreme value searching algorithm. The illuminance requirement is maintained through PID (proportion integration differentiation) closed loop control; meanwhile, through the variable-amplitude and variable-gain gradient extreme value searching algorithm, the iteration is continuously performed to fast find the lowest value of the illumination system energy consumption; the lowest value stable output is maintained; in the variable-amplitude and variable-gain gradient extreme value searching algorithm, one positive signal is introduced for changing a disturbance amplitude value; the signal is firstly and fast increased so as to ensure the precision of the algorithm; then, the signal is decreased; the time required for algorithm searching is shortened; in addition, another positive signal is introduced for changing the gain size, so that the gain is firstly increased and is then decreased; when the gain is increased, the output of the algorithm fast approaches to an extreme point; when the gain is decreased, the fluttering degree of the output near the extreme point is reduced, so that the searching time is shortened; the fluttering degree during the stabilization approaching is reduced. By using the method provided by the invention, the speed and the accuracy of the gradient extreme value searching algorithm can be improved.

Description

technical field [0001] The invention belongs to the technical field of lighting control, and more specifically relates to a lighting energy-saving control method based on a gradient extremum search algorithm of variable amplitude and variable gain. Background technique [0002] According to statistics, while the global energy consumption is increasing day by day, the power consumption is also rising accordingly, among which lighting alone accounts for 20% of the world's total annual electricity consumption. Obviously, saving electric energy and reducing the consumption of electric energy is an essential part of the whole energy-saving project. [0003] The traditional lighting system can only be turned on and off for lighting, while the existing lighting control system can meet the needs of users by adjusting the brightness of the lights and achieve a certain amount of energy saving, but the control method is more complicated, and the effect of energy saving bad. Therefore...

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Problems solved by technology

[0005] In the process of further research and experimental verification of the above method, the applicant found that the method is not ideal in terms of speed and accuracy of extremum search, and further improvement is still needed

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