“…Figure 1 is the block diagram of FxLMS algorithm, d ( n ) represents the primary noise signal, x ( n )represents the reference noise signal, P ( z ) represents the transfer function of the primary sound channel, e ( n ) represents the error signal, y ( n ) represents the output signal of the secondary loudspeaker, S ( z ) represents the transfer function of the secondary sound channel, represents the estimation of the transfer function of the secondary sound channel. W ( z ) represents the transfer function of the adaptive filter 3 – 6 . Figure 1 Block diagram of FxLMS control algorithm.…”
Section: Classical Anc Theory and Methodsmentioning
confidence: 99%
“…Assuming that the order of ANC controller filter is L , then the filter coefficient at time n can be expressed as 3 – 6 : …”
Section: Classical Anc Theory and Methodsmentioning
confidence: 99%
“…With the rapid development of electronic technology and the deepening of active noise control technology, active noise control technology has entered a period of rapid development. The development of digital signal processor makes it possible to use adaptive control theory to develop active noise controller 4 – 6 .…”
In recent years, active noise reduction technology has become a research hotspot. However, most active noise reduction technologies are developed based on passenger vehicles and are not implemented in large commercial vehicles. The large commercial vehicle sound field space is large, the traditional active noise reduction method is difficult to implement. In order to explore this problem, this paper proposes an improved active noise control method for commercial vehicles: (1) based on the traditional notch filter, a notch FxLMS algorithm based on speed smoothing is proposed; (2) on the basis of the traditional wire–narrowband hybrid ANC algorithm, the reference signal weighting technology is introduced into the wide-band subsystem, and the notch FxLMS algorithm based on speed smoothing is used as the narrowband subsystem, so as to propose an improved wire-narrowband hybrid ANC algorithm. With the help of MATLAB, the simulation model of the designed algorithm is established, and the collected commercial vehicle test noise data is used as the reference signal to simulate and verify the proposed algorithm. The results show that the proposed method has certain practicability.
“…Figure 1 is the block diagram of FxLMS algorithm, d ( n ) represents the primary noise signal, x ( n )represents the reference noise signal, P ( z ) represents the transfer function of the primary sound channel, e ( n ) represents the error signal, y ( n ) represents the output signal of the secondary loudspeaker, S ( z ) represents the transfer function of the secondary sound channel, represents the estimation of the transfer function of the secondary sound channel. W ( z ) represents the transfer function of the adaptive filter 3 – 6 . Figure 1 Block diagram of FxLMS control algorithm.…”
Section: Classical Anc Theory and Methodsmentioning
confidence: 99%
“…Assuming that the order of ANC controller filter is L , then the filter coefficient at time n can be expressed as 3 – 6 : …”
Section: Classical Anc Theory and Methodsmentioning
confidence: 99%
“…With the rapid development of electronic technology and the deepening of active noise control technology, active noise control technology has entered a period of rapid development. The development of digital signal processor makes it possible to use adaptive control theory to develop active noise controller 4 – 6 .…”
In recent years, active noise reduction technology has become a research hotspot. However, most active noise reduction technologies are developed based on passenger vehicles and are not implemented in large commercial vehicles. The large commercial vehicle sound field space is large, the traditional active noise reduction method is difficult to implement. In order to explore this problem, this paper proposes an improved active noise control method for commercial vehicles: (1) based on the traditional notch filter, a notch FxLMS algorithm based on speed smoothing is proposed; (2) on the basis of the traditional wire–narrowband hybrid ANC algorithm, the reference signal weighting technology is introduced into the wide-band subsystem, and the notch FxLMS algorithm based on speed smoothing is used as the narrowband subsystem, so as to propose an improved wire-narrowband hybrid ANC algorithm. With the help of MATLAB, the simulation model of the designed algorithm is established, and the collected commercial vehicle test noise data is used as the reference signal to simulate and verify the proposed algorithm. The results show that the proposed method has certain practicability.
“…Reinglee tried to use ANC technology to control the radiated noise of transformers [6]. This experiment was the first time that active noise control technology was applied in practical situations.…”
Section: Compared With Passive Noise Control Technology Active Noise ...mentioning
confidence: 99%
“… XW (7) Assuming that the secondary acoustic channel function is estimated by a filter of order M, the filter coefficient at time n can be expressed as [4][5][6]:…”
Section: Classical Adaptive Active Noise Control Algorithmmentioning
In recent years, active noise reduction technology has become a research hotspot. However, most active noise reduction technologies are developed based on passenger vehicles and are not implemented in large commercial vehicles. The large commercial vehicle sound field space is large, the traditional active noise reduction method is difficult to implement. In order to explore this problem, this paper proposes an improved active noise control method for commercial vehicles :(1) based on the traditional notch filter, a notch FxLMS algorithm based on speed smoothing is proposed; (2) On the basis of the traditional wire-narrowband hybrid ANC algorithm, the reference signal weighting technology is introduced into the wide-band subsystem, and the notch FxLMS algorithm based on speed smoothing is used as the narrowband subsystem, so as to propose an improved wire-narrowband hybrid ANC algorithm. With the help of MATLAB, the simulation model of the designed algorithm is established, and the collected commercial vehicle test noise data is used as the reference signal to simulate and verify the proposed algorithm. The results show that the proposed method has certain practicability.
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