[VicPiMakers Projects] Challenge 2: Confirm preliminary results

[James Briante]

Hi Mark,

Congratulations for 100% on Challenge 2 (Bonus helped!)

I’ve used your times for (t1, t2) to compute total distance covered.

P = 2p1  +  p2

   = at12 + vt2  , using your values gives

   = 10(1.17)2 + 35(6.66)

   = 246.789, past desired position (p =240)

Check your solution to the quadratic equation.
Jim



On Sat, Nov 14, 2020 at 9:29 PM Mark G. <vpm at palaceofretention.ca> wrote:

> Hi Jim,
>
> Thanks for the corrections.  Here are my updated results
> with some trial solutions for outputs 9 and 10.
> I differ in output 10.
>
> $ echo  33009 9002 11 | ../bin/cnc
> Input:
> RegP: 33009      bits: 1000000011110001
> RegM: 9002       bits: 0010001100101010
> RegS: 11         bits: 00001011
> Output #1: 241   (position)      bits: 11110001
> Output #2: 35    (velocity)      bits: 00100011
> Output #3: 2     (accel.)        bits: 00000010
> Output #4: 10    (time)          bits: 00001010
>
> Error status:
> Position error.
> Velocity ok.
> Acceleration error.
> Time error.
>
> Error corrected:
> Output #5: 240   (position)      bits: 11110000
> Output #6: 35    (velocity)      bits: 00100011
> Output #7: 10    (accel.)        bits: 00001010
> Output #8: 9     (time)          bits: 00001001
>
> Error status:
> Position ok.
> Velocity ok.
> Acceleration ok.
> Time ok.
>
> Output #9:
>   Travel time t: 6.93 (s)
>   final velocity v: 69.28 (cm/sec)
>
> Output #10:
>   Testung t1 solution 1: 12.83 (s)
>   Invalid t2 with t1 solution 1: -16.66
>   trying t1 solution 2: 1.17 (s)
>   Valid t2 with t1 solution 2: 6.66 (s)
>
>   Solution t1: 1.17 (s)
>   Solution t2: 6.66 (s)
>
> Output #11:
> Solutions involving a negative amount for t2 are not
> physically possible without time travel.
>
>
>
> On 2020-11-12 8:00 p.m., James Briante wrote:
> >
> >
> > Mark -a big thanks for pointing out the errors! v & t in the
> > Callenge2.pdf are typing errors. I should have included the actual
> > output screen (see attachment) with the other files. I've blacked out
> > the answer to Output #11.
> >
> > Things have been quiet on project talk re: challenge 2. Could these
> > errors be the reason?
> >
> > I don't have a read on what I should do for output #10. Should I provide
> > the solution to the quadratic equation?
> >
> > Jim
> >
> >
> > On Wed, Nov 11, 2020 at 5:09 PM Mark G. <vpm at palaceofretention.ca
> > <mailto:vpm at palaceofretention.ca>> wrote:
> >
> >     Hi Jim,
> >
> >     I've completed up-to output #8 of the challenge and have
> >     some discrepancies with your challenge specification.
> >     Specifically, velocity/acceleration error switch, differing
> >     values for uncorrected time (t) and velocity (v).
> >
> >     Your values:
> >     Input Data: 33009,9002,11 (initial values - RegP, RegM, RegS)
> >     Output #1: 241 (value of p, transferred from RegP)
> >     Output #2: 186 (value of v, transferred from RegM)
> >     Output #3: 10 (value of a, transferred from RegM)
> >     Output #4: 220 (value of t, transferred RegM)
> >
>  --------------------------------------------------------------------------------
> >
> >     Output # 5 to #8 – values of p, v, a, and t with corrections
> >
>  --------------------------------------------------------------------------------
> >
> >     Output #5: 240 (p)
> >     Output #6: 35 (v)
> >     Output #7: 10 (a)
> >     Output #8: 9 (t)
> >
> >     My values:
> >
> >     $ echo  33009 9002 11 | ../bin/cnc
> >     Input:
> >     RegP: 33009      bits: 1000000011110001
> >     RegM: 9002       bits: 0010001100101010
> >     RegS: 11         bits: 00001011
> >     Output #1: 241   (position)      bits: 11110001
> >     Output #2: 35    (velocity)      bits: 00100011
> >     Output #3: 2     (accel.)        bits: 00000010
> >     Output #4: 10    (time)          bits: 00001010
> >     Position error.
> >     Velocity ok.
> >     Acceleration error.
> >     Time error.
> >     Error corrected:
> >     Output #5: 240   (position)      bits: 11110000
> >     Output #6: 35    (velocity)      bits: 00100011
> >     Output #7: 10    (accel.)        bits: 00001010
> >     Output #8: 9     (time)          bits: 00001001
> >     Position ok.
> >     Velocity ok.
> >     Acceleration ok.
> >     Time ok.
> >
> >     What do you think?
> >
> >     Mark
> >
> >     --
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> >     Projects at vicpimakers.ca <mailto:Projects at vicpimakers.ca>
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> >
> >
>
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