Calculate velocity and acceleration in each time step in neural network

Question

Tulasi Ram Tammu 2016-10-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/309119-calculate-velocity-and-acceleration-in-each-time-step-in-neural-network

回答： Greg Heath 2016-10-26

I am working with feed forward neural network. I have a data set with 46995 rows and 18 columns. First 12 columns are input parameters and other 6 columns are displacement, velocity,acceleration in vertical and torsional directions respectively.

I would like train the network for half time steps and test for the rest. While testing I would like take first input parameters in input2 and update them with output3 for the rest of the time steps.

could anyone help me with this because my results are not matching with target values in the second half.

load 'Dataset'
Dataset(any(isnan(Dataset),2),:)=[]; 
input1 = Dataset(1:23497,1:12)';
target1 = Dataset(1:23497,[13,15])';
input2 = Dataset(23498:46995,1:12)';
target2 = Dataset(23498:46995,[13,15])';
t1=0:0.0128:300.7808;
t2=300.7808:0.0128:601.5744;
% Create a Fitting Network
hiddenLayerSize = 24;
net = fitnet(hiddenLayerSize);
% Setup Division of Data for Training,
net.divideParam.trainRatio = 70/100;
net.divideParam.valRatio = 15/100;
net.divideParam.testRatio = 15/100;
% Train the Network
[net,tr] = train(net,input1,target1);
% Test the Network
InputActual = input2(:,1);
output3=zeros(2,23498);
vel=zeros(2,23498);
acc = zeros(2,23498);
for i = 1:23498-1  
output3(:,i) = net(InputActual);
vel(:,i) = diff(output3(:,i))./0.0128;
acc(:,i)= diff(vel(:,i))./0.0128;
InputActual =[output3(1,i);vel(1,i);acc(1,i);output3(2,i);vel(2,i);acc(2,i);input2(7:end,i+1)];
end