VIP20

本课程属于：031-Automotive Crash Testing & LS-DYNA Validation English Technical Courses · 共 20 门相关课程，组合学习更完整。

查看所属VIP全部课程 →

← 返回所属目录咨询 / 购买

Crash Test DAQ and CFC Filtering 30 Cases

30 Chapters

View Course Samples Online

Configure a Crash DAQ Channel for a 50 g Accelerometer

Set up a single acceleration channel in a crash DAQ system, including sensor excitation, gain, anti-alias filter, and sample rate, to correctly acquire a 50 g full-scale signal during a sled test.

Verify DAQ Channel Gain and Offset with a Calibration Shunt

Perform an end-to-end gain and offset verification of a strain-gage channel using a shunt resistor and a precision voltage source, and document the resulting calibration factors for crash test data reduction.

Build a CFC 60 Low-Pass Filter for a Seatbelt Load Channel

Implement a CFC 60 digital low-pass filter in the DAQ post-processing chain for a seatbelt load cell channel, ensuring the filter meets the CFC class requirements for phase and magnitude response.

Compare CFC 180 and CFC 600 Filtering on a Head Acceleration Pulse

Apply CFC 180 and CFC 600 filters to the same head acceleration pulse and compare the resulting peak values and pulse durations to illustrate the effect of filter class selection on injury criteria.

Design an Anti-Alias Filter for a 10 kHz Crash DAQ System

Select and configure an analog anti-alias filter for a 10 kHz sampled crash DAQ system, ensuring adequate attenuation at the Nyquist frequency while preserving the signal bandwidth required for CFC 600 channels.

Detect and Correct Channel Saturation in a Crash Pulse

Identify saturation in a chest acceleration channel from a sled test, apply a validated correction method, and assess the impact on the calculated chest deflection.

SaturationIdentify

Synchronize DAQ Channels with an Event Trigger

Configure a hardware event trigger to synchronize acceleration, load, and displacement channels in a crash DAQ system, and verify time alignment within 1 ms across all channels.

Implement a CFC Filter Bank for Multi-Channel Post-Processing

Develop a reusable CFC filter bank that applies the correct CFC class (60, 180, 600, 1000) to each channel based on channel metadata, and validate the output against reference filtered data.

Validate CFC Filter Implementation Against ISO 6487 Reference Data

Test a custom CFC filter implementation using ISO 6487 reference test signals and verify that the magnitude and phase responses meet the standard's tolerances.

Analyze the Effect of Filter Order on CFC 180 Compliance

Compare first-order, second-order, and fourth-order Butterworth filters for CFC 180 compliance, and determine the minimum order that satisfies the ISO 6487 tolerance band.

Remove DC Offset and Drift from a Crash Acceleration Signal

Apply a high-pass filter and baseline correction to remove DC offset and low-frequency drift from a crash acceleration signal without distorting the CFC-filtered pulse.

Accelerationhigh-pass

Resample a Crash DAQ Signal to a Uniform Time Base

Resample a non-uniformly sampled crash DAQ signal to a uniform time base using polyphase filtering, and verify that the resampling does not introduce aliasing or alter the CFC-filtered peak.

Compute Injury Criteria from Filtered Crash Data

Calculate HIC, chest deflection, and femur force from CFC-filtered crash DAQ channels, and verify the results against a known reference dataset.

CriteriaFiltered

Design a CFC 1000 Filter for a High-Frequency Acceleration Channel

Design and implement a CFC 1000 filter for a high-frequency acceleration channel sampled at 20 kHz, ensuring the filter meets the CFC 1000 tolerance while avoiding numerical instability.

CFCHigh-Frequency

Troubleshoot Noise in a Low-Level Load Cell Channel

Diagnose and mitigate 50 Hz power-line noise and ground-loop interference in a low-level load cell channel by applying proper shielding, grounding, and a notch filter without affecting CFC compliance.

TroubleshootLow-Level

Implement Real-Time CFC Filtering on an FPGA-Based DAQ

Implement a CFC 180 filter in an FPGA-based DAQ system for real-time data reduction, and verify that the fixed-point implementation meets the CFC tolerance and latency requirements.

ImplementReal-Time

Evaluate Filter Transient Response at Crash Pulse Onset

Analyze the transient response of a CFC 60 filter at the onset of a crash pulse, and determine the required pre-trigger data length to avoid filter startup artifacts.

EvaluateTransient

Calibrate a Piezoresistive Accelerometer for Crash Testing

Perform a two-point calibration of a piezoresistive accelerometer using a centrifuge or shaker, and update the DAQ channel sensitivity and offset to ensure accurate CFC-filtered acceleration data.

CalibratePiezoresistive

Detect and Repair Time Stamp Jitter in Crash DAQ Data

Identify time stamp jitter in a crash DAQ record, correct it using interpolation, and verify that the correction preserves the CFC-filtered signal integrity.

Implement a CFC Filter with Zero-Phase Distortion

Apply a forward-backward (zero-phase) CFC filter to a crash pulse and compare its peak and timing with a causal CFC filter to assess the suitability for post-test analysis.

Validate DAQ Channel Cross-Talk for a Multi-Axis Accelerometer

Measure and compensate for cross-talk between axes of a triaxial accelerometer in a crash DAQ system, ensuring that CFC-filtered data from each axis is independent.

Design a CFC 60 Filter for a Displacement Channel

Design a CFC 60 filter for a displacement channel derived from an accelerometer, and verify that the double integration and filtering produce a displacement pulse within 5% of a reference measurement.

CFCDisplacement

Analyze the Impact of Sample Rate on CFC 600 Filter Accuracy

Evaluate the effect of sample rates from 5 kHz to 50 kHz on the accuracy of a CFC 600 filter, and determine the minimum sample rate that meets the ISO 6487 tolerance.

Implement a Digital Butterworth Filter for CFC 180 in Python

Implement a CFC 180 Butterworth filter in Python using scipy.signal, and validate its magnitude response against the ISO 6487 tolerance band.

ImplementButterworth

Troubleshoot Filter Instability in a High-Order CFC Implementation

Diagnose and resolve numerical instability in a high-order CFC filter implementation by analyzing pole locations and applying a suitable filter structure.

TroubleshootInstability

Create a CFC Filter Compliance Test Report

Generate a compliance test report for a CFC 180 filter implementation, including magnitude response, phase response, and pass/fail against ISO 6487 tolerances.

Apply CFC Filtering to a Crash Pulse with Missing Data

Handle missing data segments in a crash DAQ record by applying gap filling and CFC filtering, and assess the effect on the filtered peak value.

Compare Analog and Digital CFC Filtering on a Crash Signal

Compare the results of analog CFC filtering (hardware filter) and digital CFC filtering (post-processing) on the same crash signal, and quantify the differences in peak and timing.

Implement a CFC Filter for a Rotary Potentiometer Channel

Apply a CFC 60 filter to a rotary potentiometer channel measuring steering wheel angle, and verify that the filtered signal accurately captures the steering rate during a crash event.

Automate CFC Filter Selection Based on Channel Metadata

Develop a script that reads channel metadata from a crash DAQ file and automatically applies the correct CFC filter class to each channel, then validates the output against a manually filtered reference.