signals.py 文件源码

def compute_faii(self):
        filtered_acc = signal.lfilter(self.b1, self.a1, self.acc, axis=0)
        self.faii = np.sqrt((filtered_acc**2).sum(axis=1))
        # Publish just the last value
        val = self.faii[-1]
        self.faii_pub.publish(Float64(val))
        if self.recording:
            t = time()
            self.data['faii'].append((t, val))