Multi-channel active controller

Abstract

This invention discloses a multi-channel active controller, which comprises an error signal conditioner, a digital signal processor, a filter, a control signal driver and reference signal conditioner. Wherein, the signal from error sensor located outside the multi-channel active controller sequentially passes error signal conditioner, digital signal processor, filter and control signal driver; outer reference signal via reference signal condition is input to digital signal processor consisting of a plurality of A / D converters, real-time processor chips, and background factor updating data processor chips. The invention is operated simply, can maintain reality of time and use the controller traceability.

Description

1. Technical field [0001] The invention relates to an active controller, in particular to an active controller with multiple channels. 2. Background technology [0002] Active controllers are widely used in the field of noise and vibration control and are an important part of active control systems. Several control sources (speakers or exciters) can be driven by the active controller, so that the control sources generate sound or vibration that interacts with the initial noise and vibration phase, so as to achieve the purpose of reducing noise and vibration. The feature of this adaptive controller is that it has obvious effects on low-frequency noise and vibration, which makes up for the shortcomings of traditional noise and vibration control that have poor low-frequency effects. The active controllers that have been practical are widely used in active anti-noise earmuffs, active noise control systems in pipelines, active noise control systems in aircraft and car cabins, an...

AI Technical Summary

Problems solved by technology

EZ-ANC II uses a single-chip floating-point DSP chip, but its computing power is limited, and it cannot control more than 10 control sources

There are also many units in our country engaged in research on active controllers, such as Northwestern Polytechnical University, Institute of Acoustics of the Chinese Academy of Sciences, Southeast University, Shanghai Jiaotong University and Naval Engineering University, etc., but the active controllers they manufacture are only used in laboratories. For scientific research, the computing power of the chip used is also very limited, and the number of channels is less than 10

Therefore, the existing technology cannot make the number of channels of the active controller reach more than 10, cannot control more than 10 control sources at the same time, and has limited ability to control noise and vibration

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