By: Mark Bright and Mike Donaldson

 Project Goal  Applications of our system  System Block Diagram  Thermal Plant Overiew  Current Progress ◦ Engine Side (Mark) ◦ Thermal Side (Mike)

The goal of our Engine Control Workstation is to simulate thermal environments that are found in liquid-based cooling systems. With this simulation we are creating several different control methods via MATLAB and Simulink that all work together to control both the engine and thermal transient responses. Both of which combine to reduce system energy usage

Car Application PC Application

Cooling Block Thermistor Flowmeter Pump Motor

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 32-bit Processor  30 MHz Clock  16 A-D channels  12 PWM Digital I/O Channels  128K on-chip Flash memory  9 Ports total  3.3 v Supply  Interface with TI C2000 Simulink System

 What is it? ◦ Two Square Waves 90º out of phase  How does this improve accuracy? ◦ Four times as many pulse counts  Allows for ±5 RPM Error Max  Used in DSP Port 8 – Pins 6 and 7

 Drag QEP Block from Simulink  Code Below is Auto-Generated from Simulink  Show as Inner Shaft RPM in Code Composer  Show as Out Shaft RPM in GUI

Proportional, Integral Control  PI Control was added  Integral Controller is (z/z-1)  K was tuned to.0005  Ess = ± 20RPM  All data is sent to the GUI

 Performed Bilinear Transformation in MATLAB  Bilinear Transform converts an analog controller to a digital controller  Tuned Gain = 1/34.2 instead of 1/17.1 (inverse of plant)

 100 RPM Step Input  Smaller time to first Peak (Tp) by 20 mS  Less Overshoot  Ess=0 FF Compensation PI Control Only

 User can input desired RPM  Outputs: RPM, Duty Cycle, Transient Response  Updates in real time  Will add more as the project continues

 Variable Resistance  Anti-aliasing filter X

 Conversion of A/D Value to Temperature  Excel Trendline  Moving Average Filter

 Datatype conversions  Function auto-code generated

 Interface from digital to analog  Average Voltage seen by the device

 Opto-Isolator  TIP120 choice  Design for 3A

 Increase Base current  Increase voltage from 12-volt regulator (more later)  Does any PWM work ? ◦ 300mHZ !

 LPF to DC the PWM  Ideal Op Amp theory  Input = Pump

 Nick Schmidt ◦ Case Assembly ◦ Hardware Assembly

 Motivation ◦ TIP 120 Vce drop 880mv ◦ 13.5 volts max for pump/fan * Linear/Switchmode Voltage Regulator Handbook

 OCHAN’s allow for data to be outputted to: ◦ GUI ◦ Workspace

P = Vce * Ie

 Start, Type “guide” in MATLAB  GUI can be designed here with many components  Once designed, MATLAB auto- generates a.m file and.fig file

 Started with Professor Dempsey PWM Tutorial  Interfaced DSP Board, Simulink and PWM for Motor Tutorial Contents:  Simulink Model  Auto-Gen.m file  Auto-Gen.fig file  Demo.m file  DSP/Simulink Interface.m file

 PWM Brush Type Servo Amplifer – Model 10A8DD  Protected for over- voltage and over- current  DC Supply Voltage: v  Peak Current: ±10A  Maximum Continuous Current: ±6A

System Components Total Cost Fan $ Radiator $ Cooling Block $ Reservoir and Pump $ Pump $ Flow Meter $ Coolant $ Cold Cathode $ Temp Sensors - (2) $ V Power Supply $ TI TMS320F2812 DSP Boards - (2) $ VAC Solenoid Valve $ V Pittman Motor - (2) $ Misc - Wires, Tubing, Case $ 20.00