SU1275775A1 - Number-to-shaft turn angle converter - Google Patents

Abstract

The invention relates to the field of automation and can be used in automatic systems to control the angular position of the control; My objects. The aim of the invention is to simplify the converter and increase its accuracy and reliability. To do this, a subtracting amplifier and a switch are inserted into the code converter into the shaft rotation angle containing the source of the reference voltage, the actuator, the register, the octant switch, the code-voltage converter, the servo amplifier. This goal is achieved due to the higher linearity of the conversion of the actuator signals, which is provided by a subtracting amplifier with a certain transmittance and processing by the code-voltage converter by signals from the output and input of the subtractor c (to the amplifier fed to the voltage reference inputs of this transducer (L l code-voltage. 2 Il.

Description

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The invention relates to automation and can be used in automatic systems for controlling the angular position of controlled objects.

The aim of the invention is to simplify the converter and increase its accuracy and reliability.

FIG. Figure 1 shows the structural diagram of the code converter to the angle of rotation (shaft; in Fig. 2, diagrams of conversion and control signals.

The code converter to the shaft rotation angle contains the source 1 of the reference voltage, the actuator 2, the register 3, the switch 4 octants, the subtractive amplifier 5, the switch 6, the code-voltage converter 7, the servo amplifier 8, the input 9, the actuator 2, in the form of kinematically coupled engine 10 and sine-cosine sensor 11. The converter operates as follows. The source 1 of the reference voltage excites the sine-cosine sensor 11. At the outputs of the sensor 11, voltages V and V- are formed (Fig. 2a), the amplitudes of which are proportional to the sine and cosine of the angle of rotation of the shaft. These voltages are fed to the inputs of the switch 4 octants. The input code N of the angular position of the actuator shaft 2 enters the inputs of the register 3 from the input 9 of the converter. FIG. 2, 6, fe, g are signal plots at the outputs of the three most significant bits of register 3, provided that the code value changes sequentially upwards. The output signals of the three higher bits of register 3 control the switch of 4 octants, which selects and connects to the outputs of the corresponding voltages V and V, depending on the n and octant. The octant number is determined by the value of the three most significant bits of the input code N. The voltages (Fig. 23, f) from the outputs of the 4 octant switch are fed to the inputs of the subtractive amplifier 5,:: having a transmission coefficient of -0.7071. Amplifier 5 generates a signal (Fig. 2e1c), equal to the difference of the input signals from the opposite phase. For a zero octant, the output of the subtracting amplifier 5 is -0.7071 (V, .- V). This signal is fed to the first input of the switch 6, the second input of which receives a signal from the second output of the switch 4 octants. The switch 6 is controlled by the signal of the lower three bits of the input code.

, Voltages from the switch outputs (Fig. 2, and) are fed to the inputs of the reference voltage of the converter 7, code :: voltage, at the output of which the signal Vy is controlled by the actuator .2 in accordance with the expression

Claims (2)

Vy () - (; 7071Ni; cos (o (- nJ) -sin (cX-nJ-)) 4 where V is the amplitude of the supply voltage: the angle of rotation of the actuator shaft 2. The control voltage Vy flows through the servo amplifier 8, where it is amplified in power to the desired value, at the input of the actuator 2. This voltage controls the motor 10, which is kinematically connected to the sine-cosine sensor 11. When the voltage Vy is different from zero, the engine changes the angular position of the sensor shaft 11 until the voltage Vy is zero . In this case, the angular position of the shaft of the sensor 11 will correspond to the input code N. The invention of the code converter in the angle of rotation of the shaft, comprising an actuator, the input of which is connected to the output of the reference voltage source, the outputs of the actuator are connected to the inputs of the octant switch, the control inputs of which are connected with the outputs of three higher register bits, a code-voltage converter, characterized in that, in order to simplify the converter and increase its accuracy and reliability, into it vede3 .1 Here, the subtractive amplifier and the switch, the first and second outputs of the octant switch are connected to the inputs of the subtractive amplifier, the output of which is connected to the first information input of the switch, the second information input of which is connected to the first output of the octite switch, and the outputs are connected to the inputs of supports 757754 The low voltage bits of the register are connected to digital inputs of a code voltage converter, the 5 outputs of which are connected via a servo amplifier to the executive mechanism, the lower low outputs of the three high bits of the register are connected to the control input of the switch.