Impulse
Casandro Diveley
The term "impulse" is also used to refer to a fast-acting force or impact. This type of impulse is often idealized so that the change in momentum produced by the force happens with no change in time. This sort of change is a step change, and is not physically possible. However, this is a useful model for computing the effects of ideal collisions (such as in videogame physics engines). Additionally, in rocketry, the term "total impulse" is commonly used and is considered synonymous with the term "impulse".
The application of Newton's second law for variable mass allows impulse and momentum to be used as analysis tools for jet- or rocket-propelled vehicles. In the case of rockets, the impulse imparted can be normalized by unit of propellant expended, to create a performance parameter, specific impulse. This fact can be used to derive the Tsiolkovsky rocket equation, which relates the vehicle's propulsive change in velocity to the engine's specific impulse (or nozzle exhaust velocity) and the vehicle's propellant-mass ratio.
I'm using a WinXP machine connected to PCI-6024E and AT-MIO-16E-10. The whole setup is supposed to drive a DC motor and I'm supposed to design an experiment to input an impulse signal to the system and get an impulse/step response. I have to be able to define the width of the impulse signal.
The Convolution Reverb will load impulses, but that's the only effect that will. How this would cope with a guitar cab sound I have no idea, but I tried a couple of the shorter impulses it comes with, and it wasn't bad. Give it a go!
Is it possible to manually input training impulse on the Freshness and Fitness page? Power meter wasn't working on a recent ride, so no entry was made on this Strava page. A significant uptick in fitness would have occurred if the data had been registered. So my fitness curve is not reflective of actual fitness.
On Training Peaks, data can be manually inputted such that it adjusts fitness based on your estimates. Even if not totally accurate, it seems better than a curve which doesn't move at all based on the lack of data.
Thanks for posting about this. There isn't a way to add a training impulse. Do you also record heart rate on your rides? If so, you can also view your Fitness on the web using Relative Effort only (we calculate your relative effort using your heart rate data). You'll need to make sure you select that in the drop-down menu. See image below:
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Background: Identification of mechanical factors associated with patellofemoral pain, the most prevalent running injury, is necessary to help in injury prevention, but unfortunately they remain elusive.
Methods: A retrospective study compared knee abduction impulses of 20 patellofemoral pain patients with those of 20 asymptomatic patients. A second prospective study quantified knee angular impulses during the stance phase of running of 80 runners at the beginning of the summer running season. Epidemiologic data were then collected, recording the type and severity of injury of these runners during a 6-month running period.
Clinical relevance: Footwear and running style can influence knee angular impulse, and the appropriate manipulation of these variables may play a preventive role for patients who are predisposed to patellofemoral pain.
During the envlp sweeps, I see that the first simulation takes about 40 minutes to for spectre to complete (including calculattion/create impulse response bin files) while the following steps in the sweep take no more than couple of minutes (useing the models). But with no changes/updates of the schematic/N-ports/netlist, on the next sweep once again the first simulation takes about 40 minutes and all the bin files are re-generated on the first run.
If I understand your question correctly, I think the option to save the impulse response files spectre creates from an S-parameter N-port file already exists and may be selected either through the GUI or through options set in either your .cdsinit file or .cdsenv file.
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