I am working on an engine temperature model. I am stuck at a Point. There is a Signal named tred which Needs to be filtered using a Low Pass Filter to get the final Output Signal as tredf.the Problem is that tred starts from 90°C but after filtering the tredf starts from 0. I am comparing my simulink model with another realtime model. Everything seems to be ok except this initialisation. I want my filtered Signal tredf to also start from 90°C. The filter i am using is a PT1 (proportional Transmission 1st order) filter(low pass) which is being derived from a self created library.
The filter has the following 6 Inputs :
- u(k) i.e. the Input viz
tred. - T i.e. Filter Time Constant viz 500.
- y(0) i.e. the Initial value viz also
tred. - reset - connected to a bit (resets when bit is false).
- compute - connected to the same bit (computes the Output when bit is true).
- dT - sampling/increment time - i have set this to 0.1.
This is the descreption of the PT1 block for better understanding :
- The PT1 block is a discrete-time low-pass with a time constant T , the integration algorithm works by an Euler - forward . The time constant is automatically limited in their range of values ( T > = dT ) . The y ( 0 ) - input is the digital lowpass specify a start value , for this initial value can be at any time by a pulse at the reset - return receipt . The PT1 - block must explicitly with the compute - enabled input
The first 5 Inputs of the filter are fixed and i can only set dT. Does anyone has an idea so as to what am i doing wrong and how could the Output i.e.tredf also starts from 90°C ?
