Scalar Sensor Class#

class rocketpy.sensors.ScalarSensor[source]#

Model of a scalar sensor (e.g. Barometer). Scalar sensors are used to measure a single scalar value. The measurements are not affected by the sensor’s orientation in the rocket.

Variables:

sampling_rate (float) – Sample rate of the sensor in Hz.
measurement_range (float, tuple) – The measurement range of the sensor in the sensor units.
resolution (float) – The resolution of the sensor in sensor units/LSB.
noise_density (float) – The noise density of the sensor in sensor units/√Hz.
noise_variance (float) – The variance of the noise of the sensor in sensor units^2.
random_walk_density (float) – The random walk density of the sensor in sensor units/√Hz.
random_walk_variance (float) – The variance of the random walk of the sensor in sensor units^2.
constant_bias (float) – The constant bias of the sensor in sensor units.
operating_temperature (float) – The operating temperature of the sensor in Kelvin.
temperature_bias (float) – The temperature bias of the sensor in sensor units/K.
temperature_scale_factor (float) – The temperature scale factor of the sensor in %/K.
name (str) – The name of the sensor.
measurement (float) – The measurement of the sensor after quantization, noise and temperature drift.
measured_data (list) – The stored measured data of the sensor after quantization, noise and temperature drift.

__init__(sampling_rate, measurement_range=inf, resolution=0, noise_density=0, noise_variance=1, random_walk_density=0, random_walk_variance=1, constant_bias=0, operating_temperature=25, temperature_bias=0, temperature_scale_factor=0, name='Sensor')[source]#

Initialize the accelerometer sensor

Parameters:

sampling_rate (float) – Sample rate of the sensor
measurement_range (float, tuple, optional) – The measurement range of the sensor in the sensor units. If a float, the same range is applied both for positive and negative values. If a tuple, the first value is the positive range and the second value is the negative range. Default is np.inf.
resolution (float, optional) – The resolution of the sensor in sensor units/LSB. Default is 0, meaning no quantization is applied.
noise_density (float, list, optional) – The noise density of the sensor for a Gaussian white noise in sensor units/√Hz. Sometimes called “white noise drift”, “angular random walk” for gyroscopes, “velocity random walk” for accelerometers or “(rate) noise density”. Default is 0, meaning no noise is applied.
noise_variance (float, list, optional) – The noise variance of the sensor for a Gaussian white noise in sensor units^2. Default is 1, meaning the noise is normally distributed with a standard deviation of 1 unit.
random_walk_density (float, list, optional) – The random walk density of the sensor for a Gaussian random walk in sensor units/√Hz. Sometimes called “bias (in)stability” or “bias drift”. Default is 0, meaning no random walk is applied.
random_walk_variance (float, list, optional) – The random walk variance of the sensor for a Gaussian random walk in sensor units^2. Default is 1, meaning the noise is normally distributed with a standard deviation of 1 unit.
constant_bias (float, list, optional) – The constant bias of the sensor in sensor units. Default is 0, meaning no constant bias is applied.
operating_temperature (float, optional) – The operating temperature of the sensor in Kelvin. At 298.15 K (25 °C), the sensor is assumed to operate ideally, no temperature related noise is applied. Default is 298.15.
temperature_bias (float, list, optional) – The temperature bias of the sensor in sensor units/K. Default is 0, meaning no temperature bias is applied.
temperature_scale_factor (float, list, optional) – The temperature scale factor of the sensor in %/K. Default is 0, meaning no temperature scale factor is applied.
name (str, optional) – The name of the sensor. Default is “Sensor”.

Return type:

None