Published October 14, 2025 | Version v1
Dataset Open

Data and code for: Feedback control stabilizing the center of mass can be identified in unperturbed, upright standing

Authors/Creators

  • 1. ROR icon Vrije Universiteit Amsterdam

Description

Here we provide the code and data associated with our research article titled “Feedback control stabilizing the center of mass can be identified in unperturbed, upright standing.”

In this study, we propose a model relating corrective ground reaction forces to preceding center of mass position and velocity. We first checked the model’s validity by simulating an inverted pendulum model with known intrinsic and feedback parameters, to see whether and to what extend we could effectively identify the feedback parameters. Next, we tested the model in 15 young adult volunteers (21± 4 yrs, 63 ± 9 kg, 1.70 ± 0.10 m, 13 females, 2 males) in normal standing.

By running the provided code, you will be able to reproduce the results presented in the paper. Please refer to the instructions and table below for detailed information about file contents and usage.

Model simulation results

Run the following scripts in order:

1.     P1_MS01_RunSimulation

2.     P1_MS02_Analysis

3.     P1_MS03_plotFigure

4.     P1_MS04_TypicalSimFigure

To reproduce the results shown in the manuscript, run all scripts except P1_MS01_RunSimulation, since it includes random perturbations that will generate slightly different outcomes each time. If you want to generate new simulation data, make sure to run P1_MS01_RunSimulation first.

 

Human experimental results

Run the following scripts in order:

1.     P1_S01_CalcModelInput

2.     P1_S02_CalcFeedback_ParaFig

3.     P1_S03_CalcSway

To reproduce the manuscript results, run these scripts in order.

 

Folders

Content

Model_Simulation

code

P1_MS01_RunSimulation

Scripts to get all combinations of model inputs: ‘all_combinations.mat’, and simulation results: ‘sim_results_XX.mat’.

P1_MS02_Analysis

Script to get the linear regression results shown in Table 2, and the unrealistic sway simulations for each parameter value shown in Table 3.

P1_MS03_plotFigure

Script to get the figures illustrating the relationship between estimated and input parameters, as shown in Figure 4.

P1_MS04_TypicalSimFigure

Script to get the model simulation results with default input parameters, as well as estimated human control parameters, as shown in Figure 3 and 9.

MS_function

Functions which are used by the scripts

all_combinations.mat

All possible input combinations.

sim_results_01.mat

…

sim_results_10.mat

Simulation results, the number ‘01’, ‘02’, …, ‘10’ represents the number of the simulation.

sim_default.mat

Simulation results under default input parameters

sim_human.mat

Simulation results under the estimated human control parameters

Human_Experiment

code

P1_S01_CalcModelInput

Script to get the feedback model input, you will get the COM kinematics and Force data, save in the ‘result’ folder.

P1_S02_CalcFeedback_ParaFig

Script to get the feedback parameters and related figures; for each subject, you will get the feedback results of each trial and average value of all trials under normal standing conditions.

P1_S03_CalcSway

Script to get the sway results: mean, SD, RMS of COM,VCOM,COP, VCOP, and body sway.

=VU 3D model new=

Necessary functions and folders to run the main scripts.

P1_functions

ndigital

AllSub_Info.xlsx

Basic subjects’ information: age, height, mass, gender, null force number and force plates coordination records.

Remove_Standing.xlsx

Remove noise setup, will be used in ‘P1_S01_CalcModelInput’.

StandingInfo_AllSub.xlsx

Standing trial numbers.

data

Sub01, Sub02, …, Sub18

NormalStanding.xlsx: trial information

XX.ndf: motion capture data

XX.afp: force plate data

Files

Feedback control stabilizing the center of mass can be identified in unperturbed, upright standing.zip

Files (3.2 GB)

Additional details

Related works

Documents
Dataset: 10.1101/2024.12.20.629656 (DOI)