Difference between revisions of "Imprecise Rescue"

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'''Rescue/Stabilisation is imprecise :'''
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'''What to do when Rescue/Stabilisation is imprecise?'''
  
:What to do if your Rescue or Stabilisation modes are not precise?
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<!--T:12-->
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Perform Bench testing first. If it is correct, you are ready to fly.
  
:#Very important is to check, whether the Position and the Swashplate parameters are configured correctly. If not, these modes can't operate properly. Sometimes, when you are doing some tweaks in the settings, then piro optimization direction may change because of these modifications. Mostly when you have reversed Yaw axis in the Sensor tab. So it is recommended to double check/configure this parameter as the last one, when basic configuration is done.
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== Bench testing == <!--T:13-->
:#Check if the unit is aligned in all 3 axes. Alignment error should be approx. in 1° range or less. You should mount the unit precisely in respect to a helicopter frame.
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:#Rescue and Stabilisation can work in nearly any condition. But in case that your Vibrations are exceptionally high it can't be guaranteed. You can check vibrations with Spectral Analysis in the software, especially Y - Aileron axis, where there are mostly the highest.
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:#Helicopter was tilted during initialization or after initialization (it was on the side or upside down for a while). If you move with helicopter after initialization, make sure that the swashplate is level and collective is going up when the rescue is engaged.
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:If any of these requirements are not met, then you can observe with increasing flight time bigger error/inprecision. So in the start all could be OK, but at the end of the flight it may be worse.
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<!--T:14-->
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If rescue or stabilisation is not precise, do the following test:
  
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<!--T:15-->
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#Put model at a table and engage the rescue/stabilisation.
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#Swashplate should be perfectly level. If model has inclined skids, swashplate will be tilted backwards little bit to compensate this attitude.
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#When model is taken from table and any of the mode is engaged, swashplate should compensate any inlinaction in attitude of the model/unit.
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#Swashplate should counter-act to any movement so that model is forced back to the horizontal level.
 +
#When model is tilted forward, swashplate should tilt backwards (with the most helicopters).
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#When model is tilted left, swashplate should tilt right and vice versa.
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== Rescue/Stabilisation is imprecise during flight == <!--T:3-->
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In case that any of Rescue or Stabilisation modes are inconsistent, banking model to a side upon engaging or even pushing model down instead of ascending, there is serious problem either in the configuration or in the condition of the model.
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If the problem happened once it will happen sooner or later again, for this reason it is extremely important to find reason for this behavior.
 +
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=== Check list ===
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<!--T:4-->
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*Very important is to check, whether the '''Mounting Position''' and the '''Swashplate type''' parameters are configured correctly (General tab). If not, these modes can't operate properly, eventually they will work properly only for a limited time. Make sure that in the Diagnostic tab '''all directions correspond''' with a real stick movement of your radio.
 +
*Check if the unit is aligned in all 3 axes. Alignment error should be approx. in 1° range or less. You should mount the unit precisely in respect to the helicopter' frame. Use only one provided adhesive tape (1 layer). The unit should not flex or move in any way - mounting should be rock solid.
 +
*Rescue and Stabilisation can work in nearly any condition. But in case that your Vibrations are exceptionally high it can't be guaranteed. It can work only for limited time in that case. The longer and complex is flight, the higher chance for failure. Use '''Spectrum Analysis''' tool in the Spirit Settings software, especially Y - Aileron axis, where there are mostly the highest. Resonant vibrations are the most problematic and are audiable. Measure carefully with Tail Blades on if possible. Measuring vibration level by hand is irelevant, because hand can't sense a high frequencies.
 +
*Helicopter is equipped with a cooling fan that is producing ultrasound frequency. '''HobbyWing ESCs FAN''' are known for this. This has a great impact on the precision of Rescue and Stabilisation modes.
 +
*Spirit unit should be as far from a heatsource as possible.
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*Spirit unit must be initialized with no movement of the model.
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 +
<!--T:9-->
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:In case that the model is tilting to the same side during activation always, then the basic servo settings are likely not correct.
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:Please verify that the swashplate is perfectly leveled when ''Servos/Subtrim (tuning)'' is enabled. During setup it is necessary to use the '''Cyclic Leveler''' tool.
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{{Info|[[File:Info.png|18px]]
 
{{Info|[[File:Info.png|18px]]
The easiest test for checking the rescue is to fly the helicopter in very normal way (your style). Then, immediatelly after the flight and rotor is not spinning anymore, you can activate the bailout/stabilisation. If you can see that swashplate is in the horizontal position and helicopter too, then it should work correctly anytime during the flight as well. This is very safe method for checking the operation.
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<!--T:11-->
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The easiest test for checking the rescue is to fly the helicopter in very normal way (your style). Then, immediatelly after the flight while rotor is not spinning anymore, you can activate the bailout/stabilisation. If you can see that swashplate is in the horizontal position and helicopter too, then it should work correctly anytime during the flight as well. This is very safe method for checking the operation.
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== Settings for the best performance == <!--T:16-->
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<!--T:17-->
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There are two parameters that can greatly improve reliability and precision of the Stabilisation and Rescue modes:
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* '''Stabi Correction'''
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* '''Extended Signal Processing'''
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<!--T:18-->
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Both can be found in Advanced - Expert Settings.
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<!--T:19-->
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Generally default settings should be suitable for the most models. With default settings both parameters are disabled.
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If you are in doubt, please use this settings.
 +
 +
<!--T:20-->
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If you are unable to achieve precise behavior with basic maneuvers, enable ''Extended Signal Processing''.
 +
This mode is suitable for models that are producing high vibrations or a kind that is strongly interfering with sensors.
 +
 +
<!--T:21-->
 +
For advanced pilots that are performing complicated maneuvers parameter Stabi Correction can be helpful.
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Use this parameter only if default settings are not satisfying and model is in a good condition. Otherwise results can be worsened.
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Latest revision as of 13:55, 13 September 2024

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What to do when Rescue/Stabilisation is imprecise?

Perform Bench testing first. If it is correct, you are ready to fly.

1 Bench testing

If rescue or stabilisation is not precise, do the following test:

  1. Put model at a table and engage the rescue/stabilisation.
  2. Swashplate should be perfectly level. If model has inclined skids, swashplate will be tilted backwards little bit to compensate this attitude.
  3. When model is taken from table and any of the mode is engaged, swashplate should compensate any inlinaction in attitude of the model/unit.
  4. Swashplate should counter-act to any movement so that model is forced back to the horizontal level.
  5. When model is tilted forward, swashplate should tilt backwards (with the most helicopters).
  6. When model is tilted left, swashplate should tilt right and vice versa.

2 Rescue/Stabilisation is imprecise during flight

In case that any of Rescue or Stabilisation modes are inconsistent, banking model to a side upon engaging or even pushing model down instead of ascending, there is serious problem either in the configuration or in the condition of the model. If the problem happened once it will happen sooner or later again, for this reason it is extremely important to find reason for this behavior.

2.1 Check list

  • Very important is to check, whether the Mounting Position and the Swashplate type parameters are configured correctly (General tab). If not, these modes can't operate properly, eventually they will work properly only for a limited time. Make sure that in the Diagnostic tab all directions correspond with a real stick movement of your radio.
  • Check if the unit is aligned in all 3 axes. Alignment error should be approx. in 1° range or less. You should mount the unit precisely in respect to the helicopter' frame. Use only one provided adhesive tape (1 layer). The unit should not flex or move in any way - mounting should be rock solid.
  • Rescue and Stabilisation can work in nearly any condition. But in case that your Vibrations are exceptionally high it can't be guaranteed. It can work only for limited time in that case. The longer and complex is flight, the higher chance for failure. Use Spectrum Analysis tool in the Spirit Settings software, especially Y - Aileron axis, where there are mostly the highest. Resonant vibrations are the most problematic and are audiable. Measure carefully with Tail Blades on if possible. Measuring vibration level by hand is irelevant, because hand can't sense a high frequencies.
  • Helicopter is equipped with a cooling fan that is producing ultrasound frequency. HobbyWing ESCs FAN are known for this. This has a great impact on the precision of Rescue and Stabilisation modes.
  • Spirit unit should be as far from a heatsource as possible.
  • Spirit unit must be initialized with no movement of the model.
In case that the model is tilting to the same side during activation always, then the basic servo settings are likely not correct.
Please verify that the swashplate is perfectly leveled when Servos/Subtrim (tuning) is enabled. During setup it is necessary to use the Cyclic Leveler tool.

Info.png The easiest test for checking the rescue is to fly the helicopter in very normal way (your style). Then, immediatelly after the flight while rotor is not spinning anymore, you can activate the bailout/stabilisation. If you can see that swashplate is in the horizontal position and helicopter too, then it should work correctly anytime during the flight as well. This is very safe method for checking the operation.

3 Settings for the best performance

There are two parameters that can greatly improve reliability and precision of the Stabilisation and Rescue modes:

  • Stabi Correction
  • Extended Signal Processing

Both can be found in Advanced - Expert Settings.

Generally default settings should be suitable for the most models. With default settings both parameters are disabled. If you are in doubt, please use this settings.

If you are unable to achieve precise behavior with basic maneuvers, enable Extended Signal Processing. This mode is suitable for models that are producing high vibrations or a kind that is strongly interfering with sensors.

For advanced pilots that are performing complicated maneuvers parameter Stabi Correction can be helpful. Use this parameter only if default settings are not satisfying and model is in a good condition. Otherwise results can be worsened.