> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:flightgear-devel- > [EMAIL PROTECTED] On Behalf Of Vivian Meazza > Sent: 20 June 2005 13:13 > To: 'FlightGear developers discussions' > Subject: RE: [Flightgear-devel] Re: New turbo/supercharger code > > Melchior FRANZ > > > > > * Vivian Meazza -- Saturday 18 June 2005 12:22: > > > void Thruster::setThrottle(float throttle) > > > { > > > _throttle = Math::clamp(throttle, 0, 1); > > > } > > > > > > Will this prevent a negative value for: > > > > > > <control-input axis="/controls/engines/engine[0]/boost-control" > > > control="THROTTLE"/> > > > > No, but this will: > > > > ControlMap.cpp:83:---------------------------------------------------- > > > > map->src0 = map->dst0 = rangeMin(type); > > > > > > ControlMap.cpp:222:--------------------------------------------------- > > > > float ControlMap::rangeMin(int type) > > { > > // The minimum of the range for each type of control > > switch(type) { > > case FLAP0: return -1; // [-1:1] > > case FLAP1: return -1; > > case STEER: return -1; > > case CYCLICELE: return -1; > > case CYCLICAIL: return -1; > > case COLLECTIVE: return -1; > > case MAGNETOS: return 0; // [0:3] > > default: return 0; // [0:1] > > } > > } > > > > > > There's no THROTTLE, so we get the default 0 set for map->{src,dst}0. > > You can avoid that by setting {src,dst}{0,1} explicitly, for example: > > > > <control-input axis="/controls/engines/engine[0]/boost-control" > > src0="-1" src1="1" dst0="-1" dst1="1" > > control="THROTTLE"/> > > > > Right - that fixes the problem.
With Melchior's valuable help I have developed a nasal simulation of the Boost Control and Boost Control Cutout for the Hurricane. This should be committed to cvs shortly. When a preset boost value is exceeded, the Boost Control acts to reduce throttle opening. This action can be overridden by the Boost Control Cutout which allows maximum boost. The output of the Boost Control is smoothed by a low-pass filter selected by Melchior. You will notice an overshoot and some lag if the throttle is opened quickly. To make it work a patch (for cvs/head) is required to YASim - attached. A new attribute 'supercharger' has been added to the aircraft config file. When this is true, the attribute 'wastegate' no longer controls the supercharger output. If you want to try the update to the Hurricane, you will need to apply this patch. It will not adversely affect any other YASim model, so far as I can tell. Both the nasal and YASim patch are temporary; both will require reworking when Andy comes up with his revision of YASim to include the new supercharger code. Any testing would be welcome, although Melchior is doing his best to break it already! In particular any feedback on any adverse effects on other models would be good. Regards, Vivian
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