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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Re: Automatic Variometer adjustment at DK7FC |
| From: | Stefan Schäfer <[email protected]> |
| Date: | Fri, 23 Dec 2011 17:57:43 +0100 |
| In-reply-to: | <805AC05E834C4F7DA019C36A04013479@JimPC> |
| References: | <[email protected]> <805AC05E834C4F7DA019C36A04013479@JimPC> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
Jim, Another thought: Am 23.12.2011 12:17, schrieb James Moritz: [...] I guess the inertia of the motor and gearbox will produce some hysteresis, moving the variometer to a very slightly over-adjusted position after the motor drive is removed, which will also help to prevent the system continuously searching around the correct tuning point.[...] This effect can be compensated by choosing the dead band treshold value. Then the motor gets stopped a bit before the resonance point and will exactly land on it. As good as having an infinitesimal small dead band ;-) Anyway we are talking about phase angles which are very very small, much below that what could become critical for a PA. 73, Stefan/DK7FC |
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