JPS6349280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a smoothing device for digital-to-sync conversion signals.

A digital-to-synchronizer converter (hereinafter referred to as a D/S converter) is used to convert a digital rotation angle control signal output from a computer system into an analog synchro signal, and the output of the D/S converter is The disadvantage was that the signal was in stages and the load could not be operated smoothly. In order to make the load operate smoothly, it is necessary to make the steps of the synchronization signal small.
To do this, it is necessary to convert the digital signal into an input synchronized signal at a high speed of, for example, 100 mS. Therefore, the occupation rate of the computer's software processing becomes high, and other processing has to be sacrificed. Furthermore, in order to drive a large-capacity load, a large-capacity D/S converter is required, which also has the disadvantage of being very expensive.

An object of the present invention is to solve the above-mentioned drawbacks, to provide a digital-to-synchro conversion signal smoothing device that can provide a large-capacity output at low cost without increasing software processing, and also provides a smoothed synchro output. Our goal is to provide the following.

In order to achieve the above object, the digital-to-synchronized conversion signal smoothing device of the present invention includes a D/S converter, a synchronized receiver rotated by the output signal of the D/S converter, and a servo motor. a generator, which receives the output signal of the synchro receiver as input;
An angle conversion servo including a servo amplifier whose output drives the servo motor generator and whose output is used as a feedback input via a resistor, and a synchro transmitter that rotates coaxially with the synchro receiver. mechanism, the resistance value of the resistor is set so as to be in a critical damping state of the angle conversion servo mechanism, and the step-like output signal of the D/S converter is configured to be smoothed and output. It is characterized by

Next, one embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a system connection diagram showing one embodiment of the present invention, and 1 is a D/S that converts a digital input signal into a stepwise analog synchronized signal.
Converter, 2 is a synchro receiver, and 3 is a servo amplifier that uses the synchro receiver 2 as an input to drive a servo motor generator 5, and uses the output signal of the generator as a feedback input via a resistor 4.
5 is a servo motor generator driven by the servo amplifier 3; 6 is a feedback resistor that returns a generator output signal of the servo motor generator to the input of the servo amplifier 3; The synchro receiver 2, the servo amplifier 3, and the resistor 4
and the servo motor generator 5 constitute an angle conversion servo mechanism. The angle conversion servomechanism is brought into a critical damping state by setting the resistance to an appropriate value. That is, the attenuation rate τ=1. In this case, the input angle θ _i of the synchro electric machine
The relationship between and the output angle θ ₀ is expressed by the following formula.

θ ₀ = | θ _i | {1-(1+ω _o t) e-ω _o t where ω _o : circular frequency t: operating time Therefore, the output signal of the synchro oscillator 6 is shown in curve 6 in FIG. As shown in _FIG . becomes.
Smooth angle control can be performed by inputting this smoothed signal into a commonly used angle conversion servo receiving mechanism (shown in FIGS. 7 to 10). Conventionally, the output signal of the D/S converter 1, that is, the stepwise synchronization signal as shown in curve 1 in FIG. I couldn't. The details of the operation of the angle conversion servo receiving mechanism will be omitted, but it is composed of a synchro receiver 7, a servo amplifier 8, a servo motor 9, and a control mechanism 10, and controls the angle of the load according to the input synchro signal. It is a mechanism. There is no need to explain that smooth control can be achieved if the input is smoothed.

As explained above, the digital synchro signal smoothing device of the present invention is configured to smooth and output a stepped input signal by operating the angle conversion servo mechanism in a critical damping state. This has the advantage that the operation of the load can be smoothly controlled without any increase in software processing. Furthermore, by increasing the size of the synchro transmitter, the load capacity can be easily increased.

[Brief explanation of the drawing]

FIG. 1 is a system connection diagram showing one embodiment of the present invention, and FIG. 2 is a time chart showing input signals and output signals of FIG. 1. 1... D/S converter, 2... Synchro receiver,
3... Servo amplifier, 4... Feedback resistor, 5... Servo motor generator, 6... Synchro transmitter, 7... Synchro receiver, 8... Servo amplifier, 9... Servo motor, 10... Control mechanism.

Claims (1)

[Claims] 1 A digital-synchronized converter, a synchronized receiver rotated by the output signal of the digital-synchronized converter, a servo motor generator, the output signal of the synchronized receiver as input, and the output of the synchro receiver rotated by the output signal of the digital-synchronized converter. and an angle conversion servo mechanism including a servo amplifier and a synchro receiver rotating coaxially with the synchro receiver, the output of the servo motor generator being used as a feedback input via a resistor. A digital synchronizer, characterized in that the resistance value is set so that the angle conversion servomechanism is in a critical damping state, and the digital synchro converter is configured to smooth and output a stepped output signal. Conversion signal smoothing device.