Block: AdaptiveNotch

PIC

Inports

In

Input signal

n

Speed input = notch frequency


Outports

Out

Filtered output signal


Mask Parameters

Name

ID

Description

Q

1

Q-Factor of the notch filter

n_thresh

2

Speed threshold for activating the filter

n_max

3

Maximum revolutions per minute

(Not used in floating point implementations)

p

4

Number of pole pairs

ts_fact

5

Multiplication factor of base sampling time (in integer format)

method

6

Discretization method


Description:

Notch filter with variable notch frequency

Calculation:

{ In(k) n(k) ≤ n Out (k ) = thresh In(k) ⋅ H (z) n(k) > nthresh

The transfer function H(z) of the filter is

- 1 - 2 H (z) = b0 +-b1z--+-b2z--- 1 + a1z-1 + a2z-2

with coefficients derived from the transfer function

s2 + ω2 H (s) = -----ω--0--2- s2 + Q0+ ω 0

by a matched Z-transformation.

Implementations:
FiP16 16 Bit Fixed Point Implementation
FiP32 32 Bit Fixed Point Implementation
Float32 32 Bit Floating Point Implementation
Float64 64 Bit Floating Point Implementation

Implementation: FiP16

16 Bit Fixed Point Implementation

Inports Data Type

In

int16

n

int16


Outports Data Type

Out

int16


Implementation: FiP32

32 Bit Fixed Point Implementation

Inports Data Type

In

int32

n

int32


Outports Data Type

Out

int32


Implementation: Float32

32 Bit Floating Point Implementation

Inports Data Type

In

float32

n

float32


Outports Data Type

Out

float32


Implementation: Float64

64 Bit Floating Point Implementation

Inports Data Type

In

float64

n

float64


Outports Data Type

Out

float64