[NSRCA-discussion] curious

[Vicente "Vince" Bortone]

George, 



We know now the solution you need a suppression filter integrated into the TX control system .  If NASA did it we can do it. 



I really don't like the term PIO .  They are blaming the pilot for the controlability problem and it is not the pilot.  


Vicente "Vince" Bortone 

----- Original Message ----- 
From: "Bob Richards" <bob@ toprudder .com> 
To: "General pattern discussion" < nsrca -discussion at lists. nsrca .org> 
Sent: Monday, March 22, 2010 1:38:57 PM GMT -06:00 US/Canada Central 
Subject: Re: [NSRCA-discussion] curious 


I don't know about that, but I do know that if there is enough lag time you could get into PIO (pilot induced oscillation).  

http :// www . dfrc . nasa .gov/Gallery/Movie/ STS /HTML/EM-0084-02. html 

It is interesting that the measured lag time in this instance is close to the human latency that Bill mentioned, so maybe you are right. 

Bob R. 


--- On Mon, 3/22/10, Vicente "Vince" Bortone < vicenterc @comcast.net> wrote: 



From: Vicente "Vince" Bortone < vicenterc @comcast.net> 
Subject: Re: [NSRCA-discussion] curious 
To: "General pattern discussion" < nsrca -discussion at lists. nsrca .org> 
Date: Monday, March 22, 2010, 1:57 PM 



This is very good point.  There is another important factor that I am going to try to explain.  Someone expert in controls can help us here.  I think that is called natural frequency of the control system.  If the the human natural frequency is close to the TX/RX combo that will be a huge problem since the  control system won't be stable.  In other worlds if the TX/RX latency is very small but the natural frequencies are close to each other it could be very bad results.  Well, I think this is very difficult to measure but I think this additional factor should be of consideration.  

Vicente "Vince" Bortone 

----- Original Message ----- 
From: "Bill's Email" < wemodels @cox.net> 
To: "General pattern discussion" < nsrca -discussion at lists. nsrca .org> 
Sent: Monday, March 22, 2010 10:07:47 AM GMT -06:00 US/Canada Central 
Subject: Re: [NSRCA-discussion] curious 

I think it's amusing that a year or so ago nobody had ever even heard of 
latency. Now it is THE NUMBER ONE technical specification to consider. 

Keep in mind that radio latency is one to two orders of magnitude less 
than the "human" latency (reaction time) that we must all deal with. 
That runs about 215 milliseconds on average. 

Test yours:   http :// www . humanbenchmark .com/tests/ reactiontime /index. php 




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