TEM PROIECT

S se proiecteze sistemul de comand i control al unei transmisii mecanice, cu urmtorii

parametrii:

Senzor de poziie deplasare optic absolut n cod binar natural, cu rezoluia = 7 i linia de citire

= 450;

Motor electric de curent continuu, cu puterea P = 150 W i tensiunea de alimentare U = 12 V.

Schema general a unui sistem de comand i control

SISTEM

TEHNIC

Senzor

EC Controller

Convertor

digital

analog EE

Y

y

0.1 u W

v

X

X mrime de msur (neelectric)

Y mrime de ieire din sensor

y mrime de referin

EC element comparator

eroare

u mrime de comand

EE element de execuie (motor continuu percepe semnale analogice)

W mrime de execuie

v factori perturbatori (vibraii)

Determinarea numrului de combinaii necesare poziionrii cu rezoluia = 7

=

; n zone transparente i opace.

n =

; = 7 n =

= 3086

D C R

3086 2 1543 0

1543 2 771 1

771 2 385 1

385 2 192 1

192 2 96 0

96 2 48 0

48 2 24 0

24 2 12 0

12 2 6 0

6 2 3 0

3 2 1 1

1 2 0 1

110000001110 12 bii

110000001110 = 20 * ai + 21 * ai + 2

2 * ai + 23 * ai + 2

4 * ai + 25 * ai + 2

6 * ai + 27 * ai + 2

8 *

ai + 29 * ai + 2

10 * ai + 211 * ai

110000001110 = 20 * 0 + 21 * 1 + 22 * 1 + 23 * 1 + 24 * 0 + 25 * 0 + 26 * 0 + 27 * 0 + 28 *

0 + 29 * 0 + 210 * 1 + 211 * 1

110000001110 = 3086

ai = 1 zon transparent

ai = 0 zon opac

n =

= 386; = 450

D C R

386 2 193 0 193 2 96 1

96 2 48 0 48 2 24 0

24 2 12 0 12 2 6 0

6 2 3 0

3 2 1 1 1 2 0 1

110000010 = 9 bii

110000010 = 20 * ai + 21 * ai + 2

2 * ai + 23 * ai + 2

4 * ai + 25 * ai + 2

6 * ai + 27 * ai + 2

8 *ai

110000010 = 20 * 0 + 21 * 1 + 22 * 0 + 23 * 0 + 24 * 0 + 25 * 0 + 26 * 0 + 27 * 1 + 28 *1

110000010 = 386

MOTOR DE CURENT CONTINUU

Motor current continuu

Tabel caracteristici motor current continuu

Tip S P [W] U [V] I [A] Mn [Nm] nl [min/l] IP Greutate [kg]

EC 100 S 2 25 150 12 16,8 0,43 3000 44 2,7

Diagrama motorului

ENCODER

Built to the same rugged standards as the H40 Incremental Heavy Duty encoder, this unit features an

absolute encoder out-put up to 13 bits of resolution. Designed to take the rigors- of physically demanding

environments,- the H40 has a heavy-duty housing, a 100+ pound bearing, and internal shock absorbers.

When you need absolute position in a really- tough environment the H40 absolute is what you need.

Electrical Specifications Code: 12 or 13 bits NB or GC; excess gray and BCD available Counts Per Shaft Turn: 4096 or 8192 Count Transition Accuracy: 1/2 bit maximum Supply

Voltage: 528 VDC Current Requirements: 120 mA typical Output Formats: Parallel: Gray Code, Natural Binary and Binary Coded Decimal; Serial: Serial

Synchronous Interface (SSI) compatible; Analog: 4-20 mA, 0-10V Voltage/Output: (see note 5) 28V/V: Line Driver, 528 VDC in, Vout = Vin 28V/5: Line Driver, 528 VDC in, Vout = 5 VDC 28V/OC: Open Collector, 528 VDC in OCout

SSI: 528 VDC in/5Vout (consult factory) Protection Level: Reverse, overvoltage and output short circuit protection Frequency Response: 100kHz (1200 RPM for 12-bits, 600 RPM for 13-bits)

Mechanical Specifications Shaft Diameter: 5/8 nominal

6

Flats On Shaft: Two flats, 0.75 long X 0.30 deep at 90

Shaft Loading/Bearing Life: Refer to Figure 1

Shaft Runout: 0.001 T.I.R. at mid-point of

shaft Starting Torque at 25 C: 10.0 in-oz (max)

Bearings: Class 52100 SAE high carbon steel

Shaft Material: 1070 carbon steel, 303 stainless steel optional

Enclosure: Die cast aluminum, hard anodized with optional sealed finish. Shaft seals and sealed

bearings are standard to achieve environmental ratings.

Maximum RPM: 10,000 RPM (see Frequency Response)

Coupling Windup: The H40 uses an internal cou-pling. Windup error (degrees) = a X 7.5 X 10-4

rad/

sec2 where a = angular acceleration in rad/sec

2

Weight: Approx 9 lbs

CONTROLLER

TECHNICAL PARAMETER:

The input voltage: DC 12 v - 40 v; Power: 0.01 - 400 w; Current, rated current 8 A, through the current largest 12; Frequency: 13 KHZ; The PWM pulse width speed range: 10% - 100%; With 10 a fuse, with power control, voltage over-voltage protection function; Size: 55 * 60 * 28 mm;

7

Four positioning hole is apart from the 5 mm plate edge, positioning hole diameter is 3.2 mm; Onboard 10 a fuse, the fuse is 5 * 20 mm standard size.

COMPARATOR

Adjustable Voltage comparator DC 12V Car Volt Module for Car circuit modification/industrial equipment/circuit testing

Operating temperature: -400 C +85

0 C

Type: logic ICs Brand Name: Voltage Comparator Module Supply voltage: DC 12 V Model number: comparator controller Operating voltage: 12 V Operating current: 30 mA

CONVERTOR

12-Bit, 3Msps, Sampling A/D Converter

Sample Rate: 3Msps 72dB S/(N + D) and 82dB SFDR at Nyquist 0.35LSB INL and 0.25LSB DNL (Typ) Power Dissipation: 150W

40MHz Full Power Bandwith Sampling 2.5V Bipolar Input Range

8

8

BIBLIOGRAFIE

http://cds.linear.com/docs/en/datasheet/1412fs.pdf

https://www.thorlabs.com/thorcat/7100/LDC8020-Manual.pdf

http://www.conexelectronic.ro/produs.php?id=12139

http://www.givimisure.it/download/3_ENCODER_ROTATIVI/6_AEN58/ST06_E12_A_AEN58SCPAR_GI

VI_E NG.pdf