Instituto Politécnico NacionalEscuela Superior de Ingeniería Mecánica y Eléctrica

Control and Mechanical Design for a Flume with Wavemaker

Students:Ávila del Castillo FernandoBandala Carreón MauricioMartínez Mejía Rodrigo A.

Advisers:Dr. Eric G. Bautista

GodínezDr. Salvador A. Rodríguez

Paredes

Objective

• Flume design with wavemaker, proposing the mechanism and the controller for the simulation of different wave conditions, manipulating the variables witch interving in the waves

Necesity

• To have a device which permits the study and corroboration of scale models based on the wave’s kinematics and dynamics.

Requirements

• The flume with wavemaker should have the posibility to be programed under the introduction of desirable frecuency and wave height.

• This data must be introduced by software or another peripheral entrance

Wavemaker Types

• Flap• Double Flap• Wedge • Piston • Pneumatic piston

State of the Art

Wallingford (England)

Comercial flumes with wavemaker

Cussons (England)

Gunt (Demark)

Aplication Areas: Naval Engineering

• Ship stability

• Hydrodinamic Test

Maritime Port and Coast Engineering

• Performance of plataforms

• Sediment transport• Beach Protection• Test of structures

Measurable termsCustomer Requirements Engineering Requirements

A1 – Affordable Construction National Materials

A2 – Water reuse Water reuse

A3 – Affordable Maintenance Unskilled staff

A4 – Water treatment Filter Unit

B1 – Regular Waves Paddle Control

B2 – Programable amplitude and frecuency Microcontroller

B3 – Real wave with 1m amplitude and frequency of 3 – 4 seconds

Scale representation

B4 – Friendly interface Wave programming and simulation of results

B5 – To reduce to the minimum waves reflection

Feedback control

B6 - Plotting desired wave Softwares with sinus ploting

B7 – To measure height of OWC Height measuring device

B8 – Equation based wave programming. Introduce equation in it’s general form

B9 – Water volume must be the desired Paddle with enough power

B – 10 Paddle's joint avoids movement on it generated due to the torque

Crank located in the pressure center of the paddle

B – 11 Water container in stand by Tank

B – 12 Bomb for filling flume Proper selection based on power

C1 - 5 m large, 0.45m deep, 0.3 m wide Measures in base to scale

C2 – Total height comfortable for the user Height based in the average height of Mexican people

D1 – Esthetic Finished goods

D2 – Transparent Walls Translucent walls

E1 – Easy Installation Installation without skilled labor

E2 – Simple Design Commercial joints elements

E3 – Pallet material must be light and resistant

Resistant to pressure force

F1 – Anticorrosive materials Water resistant

F2 – Prevent water leakage Hermetic jointsF3 – Protection of electric-electronic system. Safety switchF4 – Structurally resistant design Capable of supporting flume, OWC and

water

Concepts generator Function Concept A B C D F G

Wavemaker

Mechanic

Motor to generate movement

Pneumatic Actuator

Hydraulic Actuator

Lineal servomotor

AC Motor with sliding crank crank mechanism

CD motor with sliding crank crank mechanism

Transmit movement Chain Band Gears

Transmit power to the water Flap Paddle Double flap paddle Piston paddle Wedge Cylinder Complex movement

paddleResist corrosin (pallet) Aluminum Stanless Steel Nylamit Teflon Acrylic

Electronic

Movement control Servo valves Solenoid Driver

Motor speed sensing Encoder Tachometer

Flume

Desing

Decrease wave reflection Simple Artificial Beach

Double Artificial Beach Ramps

Flume Visibility Acrylic Glass Policarbonate

Fill Flume Bomb Gravity Arquimedes Screw

Empty Flume Gravity Water Stand by Rotoplas Tank

Water Flume Contain Hermetics Joints Clean Water Filter

Electronic

Height sensing of the waves Resistive Sensor Optic Sensor Diferential Preassure Sonar

Structure

Capable for Flume, OWC and water 80/20 Profile Cast iron Profile

Interface

Signal procces Microcontroller AVR

Microcontroller PIC PC PLC Microcontroller Motorola

Plot the waves on the PC MatLab Maple LabView

Control Desire wave Microcontroller AVR

Microcontroller PIC PC PLC Microcontroller Motorola

Comunication between PC and the device USB RS232 BlueTooth Radiofecuency

Transfer data to the device Visual Studio MatLab C++ Java Fortran Sing in data of dessire wave PC Keyboard and LCD 699 840 000

Feasibility

Function Concept

A B C D F

Wavemaker

Mechanic

Motor to generate movement Pneumatic Actuator Hydraulic Actuator Lineal servomotor AC Motor with sliding crank crank mechanism

CD motor with sliding crank crank mechanism

Transmit movement Chain Band Gears

Transmit power to the water Flap Paddle Double flap paddle Piston paddle Wedge

Resist corrosin (pallet) Aluminum Nylamit Teflon Acrylic

Electronic

Movement control Servo valves Solenoid Driver

Motor speed sensing Encoder Tachometer

Flume

Desing

Decrease wave reflection Simple Artificial Beach Double Artificial Beach Ramps

Flume Visibility Acrylic Glass Policarbonate

Fill Flume Bomb Gravity Arquimedes Screw

Empty Flume Gravity

Water Stand by Rotoplas Tank

Water Flume Contain Hermetics Joints

Clean Water Filter

Electronic

Height sensing of the waves Resistive Sensor Optic Sensor Diferential Preassure

Structure Capable for Flume, OWC and water 80/20 Profile Cast iron Profile

Interface

Signal procces Microcontroller AVR Microcontroller PIC PC PLC

Plot the waves on the PC MatLab Maple LabView

Control Desire wave Microcontroller AVR Microcontroller PIC PC PLC

Comunication between PC and the device USB RS232

Transfer data to the device Visual Studio MatLab C++

Sing in data of dessire wave PC Keyboard and LCD

268 738 560

Techonologic Availability

Function Concept

A B C D

Wavemaker

Mechanic

Motor to generate movement Pneumatic Actuator Hydraulic Actuator AC Motor with sliding crank crank mechanism

DC Motor with sliding crank crank mechanism

Transmit movement Chain Band Gears

Transmit power to the water Flap Pallet Piston Pallet Wedge

Resist corrosin (pallet) Aluminum Nylamit Acrylic

Electronic

Movement control Servo valves Solenoid Driver

Motor speed sensing Encoder Tachometer

Flume

Desing

Decrease wave reflection Simple Artificial Beach Ramps

Flume Visibility Acrylic Glass

Fill Flume Bomb Gravity

Empty Flume Gravity

Water Stand by Rotoplas Tank

Water Flume Contain Hermetics Joints

Clean Water Filter

Electronic

Height sensing of the waves Resistive Sensor Optic Sensor

Structure Capable for Flume, OWC and water Cast Iron Profile

Interface

Signal procces Microcontroller AVR Microcontroller PIC PC PLC

Plot the waves on the PC MatLab Labview

Control Desire wave Microcontroller AVR Microcontroller PIC PC PLCComunication between PC and the

device USB RS232

Transfer data to the device Visual Studio MatLab C++

Sing in data of dessire wave PC Keyboard and LCD

2 985 984

Customer Requirements Function Concept A B

Wavemaker

Mechanic

Motor to generate movement AC Motor with mechanism sliding crank crank DC Motor with mechanism sliding crank crankTransmit movement Chain Band

Transmit power to the water Piston Pallet Resist corrosin (pallet) Aluminium

Electronic

Movement control Driver

Motor speed sensing Tachometer

Flume

Desing

Decrease wave reflection Simple Artificial Beach RampsFlume Visibility Acrylic

Fill Flume Bomb Empty Flume Gravity

Water Stand by Tank Water Flume Contain Hermetics Joints

Clean Water Filter

Electronic

Height sensing of the waves Resistive Sensor

Structure Capable for Flume, OWC and water Cast Iron Profil

Interface

Signal procces Microcontroller PIC Plot the waves on the PC Labview

Control Desire wave PC Comunication between PC and the device RS232

Transfer data to the device Visual Studio Sing in data of dessire wave PC

8

Pugh MatrixPugh Matrix

Desirable Customer Requirements Desirable RequirementsScale Score 1 2 3 4

B2 – Programable amplitude and frecuency 16.92 - - + +

B4 – Friendly interface 15.38 + + + +

BB6 - Ploting desired wave 12.3 + + + +

B10 – Padlle´s joint avoids movement on it generated due to the torque 12.3 + + + +

A1 – Afforable Construction 10.76 - - + +

A3 – Afforable Maintenance 9.23 - + + +

B7 – To measure the height of OWC 7.69 + + + +

A4 – Water treatment 4.61 + + + +

B8 – Equation-based wave programming 3.07 - - + +

C1 - 5 m large, 0.45m deep, 0.3 m wide 3.07 + + + +

1 – Easy Installation 3.07 + + + -

D1 – Esthetic 1.53 + + + +

Σ + 8 9 12 11Σ - 4 3 0 1

Total Weight 60.02 69.25 100 96.93Winner Concept (Ranking) 4 3 1 2

Winner Concept• The flume with wavemaker is activated by a DC motor joint for a chain

with a sliding crank crank mechanism to the aluminum piston paddle with variable angled velocity determined by a driver and tachometer. The flume, make of acrylic, mounted on a cast iron structure, has hermetic joints, artificial double beach and ramps for decrease the wave reflection; one bomb for it filling and one valve for it drained for gravity, as well as a resistive sensor to measure the wave height and a filter for keep the water clean. Also have a tank for the stand by of the water. The signals are sent and receive through a PIC and a computer with the program Visual Studio through an RS232 cable.