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  • Users: papab
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  1. papab

    DC model motor and viscous damping: behavior inconsistent?

    I think xnuke already said this, but let me try to rephrase it. What may be confusing is that what you are calling 'faster response', is not necessarily rotational speed. If you give your infinite damping system a step input it has fast response because it's already at it's steady state speed...
  2. papab

    Control System Modelling Process

    In many respects it doesn't matter if the motion is linear or rotational. Work thru some of the tutorials IRstuff pointed to.
  3. papab

    Control System Modelling Process

    I think the your question is too broad & difficult to answer. A controls text book would be a good place to start. Do you have Simulink? They have quite a bit of tutorials and examples that could help too.
  4. papab

    AGM Charging

    Mike, the doc you linked is mostly for FLA, trojan says do not equalize AGM. Trojan and lifeline have very different recommendations. Lifeline does recommend 14.3, and they don't put a limit on current. Trojan recommends 20% of capacity. Trojan says do not equalize, lifeline says you can...
  5. papab

    AGM Charging

    Weekly equalization? Wouldn't that shorten the life? Lifeline says do it only if you have to. What happens to the battery if the voltage is you high, as long as it doesn't get too hot?
  6. papab

    AGM Charging

    I have an inverter running from the van 12V system as you've described. The lifeline guy I talked to said that 14.1 was close enough to the 14.3 +/- 0.1 that they recommend. I also have the temperature sensor with the xantrex. I have a trimetric battery monitor which includes voltage & I've...
  7. papab

    AGM Charging

    Yes, there are 3 chargers, xantrex, alternator, solar CC. My usage profile: daily use is about 30 ah (20%). A short drive or some good sun if I'm parked will get me back to 90%. That last 10% can take a while. Some days there's no sun and I don't drive. On a trip this year, with little sun...
  8. papab

    AGM Charging

    I have a lifeline 150 ah AGM battery in a campervan. I have a trimetric battery monitor. The charging system consists of the van alternator (about 14.1V, 220 Amps), a xantrex 60 amp charger, and a 100 W portable solar panel. When driving I can charger from either the charger or the van...
  9. papab

    hypermiling technique, driving with load

    I know what enrichment is, but why would you do that at part throttle? I can understand wot enrichment, but seems like less than wot would be stoichiometric.
  10. papab

    hypermiling technique, driving with load

    "part throttle enrichment" ?
  11. papab

    diesel/gas costs

    Nope, taxes only make up 10 cents out of of the 50-75 cent per gal difference. Us: gas:49.5 diesel 54.8 CO gas 40.4 diesel 44.9
  12. papab

    diesel/gas costs

    I realize this isn't an engineering question, but more engineering economy, but I'm sure someone here will have some wisdom[bigsmile]. Diesel fuel costs about 25% more than regular gas right now. Is this here to stay because of the requirement for low sulfer now? If it isn't that, is there...
  13. papab

    hypermiling technique, driving with load

    I can see that going slowing on the climb is going to save gas, but so would slower on the flats. The rollercoaster highway (Lionel's example) may be a special case where it makes sense. Most of the hills that I drive on are not like that. I should probably run some calcs on this, but it...
  14. papab

    hypermiling technique, driving with load

    The hypermilers have this technique they call driving with load DWL. In a nutshell the technique is to hold a constant load on the climb, keeping the fuel consumption constant while allowing the speed to drop. http://ecomodder.com/forum/EM-hypermiling-driving-tips-ecodriving.php#58...

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