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W16

1. Onshape 零組件繪製

2. 建立 CoppeliaSim 4.1.0 MTB robot 場景

程式:

function sysCall_init()
    joint01=sim.getObjectHandle('joint1')
    joint02=sim.getObjectHandle('joint2')
    joint03=sim.getObjectHandle('joint3')
    jointz=sim.getObjectHandle('jointz')
    sim.setJointTargetPosition(joint01,0)
    sim.setJointTargetPosition(joint02,0)
    sim.setJointTargetPosition(joint03,0)
    sim.setJointTargetPosition(jointz,0)
    deg1=0
    deg2=0
    deg3=0
end

function sysCall_actuation()
    message,auxiliaryData=sim.getSimulatorMessage()
    while message~=-1 do
        if (message==sim.message_keypress) then
            if (auxiliaryData[1]==2009) then
            deg1=deg1+1
            deg3=deg2-deg1
            sim.setJointTargetPosition(joint01,deg1*math.pi/180)
            end
            if (auxiliaryData[1]==2010) then
            deg1=deg1-1
            deg3=deg2-deg1
            sim.setJointTargetPosition(joint01,deg1*math.pi/180)
            end
            if (auxiliaryData[1]==2007) then
            deg2=deg2+1
            deg3=deg1-deg2
            sim.setJointTargetPosition(joint02,deg2*math.pi/180)
            end
            if (auxiliaryData[1]==2008) then
            deg2=deg2-1
            deg3=deg1-deg2
            sim.setJointTargetPosition(joint02,deg2*math.pi/180)
            end
            if (auxiliaryData[1]==115) then
                   sim.setJointTargetPosition(jointz,-0.02)
                   sim.setIntegerSignal('pad_switch',1)
                end
            if (auxiliaryData[1]==119) then
                   sim.setJointTargetPosition(jointz,0)
                end
            if (auxiliaryData[1]==32) then
                   sim.setIntegerSignal('pad_switch',0)
                end
        end
    message,auxiliaryData=sim.getSimulatorMessage()
    end        
end

function sysCall_sensing()
    -- put your sensing code here
end

function sysCall_cleanup()
    -- do some clean-up here


-- See the user manual or the available code snippets for additional callback functions and details
   end

3. 手臂末端加入 components-gripper-suction pad 吸盤

程式:

function sysCall_init() 
    --this is teach by 40823214
    objectHandle=sim.getObjectHandle('suctionPad')
    sim.setUserParameter(objectHandle,'@enable','')
    modelBase=sim.getObjectAssociatedWithScript(sim.handle_self)
    robotBase=modelBase
    while true do
        robotBase=sim.getObjectParent(robotBase)
        if robotBase==-1 then
            robotName='Dobot'
            break
        end
        robotName=sim.getObjectName(robotBase)
        suffix,suffixlessName=sim.getNameSuffix(robotName)
        if suffixlessName=='Dobot' then
            break
        end
    end

    s=sim.getObjectHandle('suctionPadSensor')
    l=sim.getObjectHandle('suctionPadLoopClosureDummy1')
    l2=sim.getObjectHandle('suctionPadLoopClosureDummy2')
    b=sim.getObjectHandle('suctionPad')
    suctionPadLink=sim.getObjectHandle('suctionPadLink')
    local gripperBase=sim.getObjectAssociatedWithScript(sim.handle_self)

    infiniteStrength=sim.getScriptSimulationParameter(sim.handle_self,'infiniteStrength')
    maxPullForce=sim.getScriptSimulationParameter(sim.handle_self,'maxPullForce')
    maxShearForce=sim.getScriptSimulationParameter(sim.handle_self,'maxShearForce')
    maxPeelTorque=sim.getScriptSimulationParameter(sim.handle_self,'maxPeelTorque')

    sim.setLinkDummy(l,-1)
    sim.setObjectParent(l,b,true)
    m=sim.getObjectMatrix(l2,-1)
    sim.setObjectMatrix(l,-1,m)
end

function sysCall_cleanup() 
    --this is teach by 40823214
    sim.setLinkDummy(l,-1)
    sim.setObjectParent(l,b,true)
    m=sim.getObjectMatrix(l2,-1)
    sim.setObjectMatrix(l,-1,m)
end 

function sysCall_sensing() 
    parent=sim.getObjectParent(l)
    --this is teach by 40823214
    local sig=sim.getIntegerSignal("pad_switch")
    if (not sig) or (sig==0) then
        if (parent~=b) then
            sim.setLinkDummy(l,-1)
            sim.setObjectParent(l,b,true)
            m=sim.getObjectMatrix(l2,-1)
            sim.setObjectMatrix(l,-1,m)
        end
    else
        if (parent==b) then
            index=0
            while true do
                shape=sim.getObjects(index,sim.object_shape_type)
                if (shape==-1) then
                    break
                end
                local res,val=sim.getObjectInt32Parameter(shape,sim.shapeintparam_respondable)
                if (shape~=b) and (val~=0) and (sim.checkProximitySensor(s,shape)==1) then
                    -- Ok, we found a respondable shape that was detected
                    -- We connect to that shape:
                    -- Make sure the two dummies are initially coincident:
                    sim.setObjectParent(l,b,true)
                    m=sim.getObjectMatrix(l2,-1)
                    sim.setObjectMatrix(l,-1,m)
                    -- Do the connection:
                    sim.setObjectParent(l,shape,true)
                    sim.setLinkDummy(l,l2)
                    break
                end
                index=index+1
            end
        else
            -- Here we have an object attached
            if (infiniteStrength==false) then
                -- We might have to conditionally beak it apart!
                result,force,torque=sim.readForceSensor(suctionPadLink) -- Here we read the median value out of 5 values (check the force sensor prop. dialog)
                if (result>0) then
                    breakIt=false
                    if (force[3]>maxPullForce) then breakIt=true end
                    sf=math.sqrt(force[1]*force[1]+force[2]*force[2])
                    if (sf>maxShearForce) then breakIt=true end
                    if (torque[1]>maxPeelTorque) then breakIt=true end
                    if (torque[2]>maxPeelTorque) then breakIt=true end
                    if (breakIt) then
                        -- We break the link:
                        sim.setLinkDummy(l,-1)
                        sim.setObjectParent(l,b,true)
                        m=sim.getObjectMatrix(l2,-1)
                        sim.setObjectMatrix(l,-1,m)
                    end
                end
            end
        end
    end
end 
--by 40823214

由 40823214 林厚宇教學

4. 逆向運動學函式

程式:

function moving(x,y)
    a=0.4
    b=0.4
    c=math.pow((math.pow(x,2)+math.pow(y,2)),0.5)
    s=(a+b+c)/2
    area=math.pow((s*(s-a)*(s-b)*(s-c)),0.5)
    h=area/(2*c)
    deg1_base=math.atan(x/y)
    if x<0 and y<0 then
        deg1_base=deg1_base+math.pi
    end
    deg1_tri=math.asin(h/a)
    deg1=deg1_base+deg1_tri
    deg2=math.pi-(0.5*math.pi-deg1_tri)-math.acos(h/b)
    deg3=deg2-deg1
    sim.setJointTargetPosition(joint01,deg1)
    sim.setJointTargetPosition(joint02,-deg2)
    sim.setJointTargetPosition(joint03,deg3)
end


function sysCall_threadmain()
    joint01=sim.getObjectHandle('joint1')
    joint02=sim.getObjectHandle('joint2')
    joint03=sim.getObjectHandle('joint3')
    jointz=sim.getObjectHandle('jointz')
    sim.setJointTargetPosition(joint01,0)
    sim.setJointTargetPosition(joint02,0)
    sim.setJointTargetPosition(joint03,0)
    sim.setJointTargetPosition(jointz,0)
    sim.setIntegerSignal("pad_switch",1)
    sim.setJointTargetPosition(jointz,-0.02)
    sim.wait(5)
    sim.setJointTargetPosition(jointz,0)
    while sim.getSimulationState()~=sim.simulation_advancing_abouttostopre do
    moving(0.2,0.7)
    sim.wait(5)
    sim.setIntegerSignal("pad_switch",0)
    sim.wait(5)
    sim.setIntegerSignal("pad_switch",1)
    sim.setJointTargetPosition(jointz,-0.1)
    sim.wait(5)
    sim.setJointTargetPosition(jointz,0)
    sim.wait(5)
    moving(-0.3,-0.55)
    sim.wait(2)
    sim.setIntegerSignal("pad_switch",0)
    sim.wait(5)
    sim.setIntegerSignal("pad_switch",1)
    sim.setJointTargetPosition(jointz,-0.1)
    sim.wait(5)
    sim.setJointTargetPosition(jointz,0)
    sim.wait(5)
    end

end

function sysCall_cleanup()
    -- Put some clean-up code here
end

-- See the user manual or the available code snippets for additional callback functions and details

5. Python remote API 逆向運動學函式

程式:

import sim as vrep
import math
import random
import time
import math


print ('Start')
 
vrep.simxFinish(-1)
 
clientID = vrep.simxStart('127.0.0.1', 19997, True, True, 5000, 5)
  
if clientID != -1:
    print ('Connected to remote API server')
      
    res = vrep.simxAddStatusbarMessage(
        clientID, "This is teach by 40823214",
        vrep.simx_opmode_oneshot)
    if res not in (vrep.simx_return_ok, vrep.simx_return_novalue_flag):
        print("Could not add a message to the status bar.")
  
     
    opmode = vrep.simx_opmode_oneshot_wait
    STREAMING = vrep.simx_opmode_streaming 
  
     
    vrep.simxStartSimulation(clientID, opmode)
    ret,joint01=vrep.simxGetObjectHandle(clientID,"joint1",opmode)
    ret,joint02=vrep.simxGetObjectHandle(clientID,"joint2",opmode)
    ret,joint03=vrep.simxGetObjectHandle(clientID,"joint3",opmode)
    ret,jointz=vrep.simxGetObjectHandle(clientID,"jointz",opmode)
       
    vrep.simxSetJointTargetPosition(clientID,joint01,0,opmode)
    vrep.simxSetJointTargetPosition(clientID,joint02,0,opmode)
    vrep.simxSetJointTargetPosition(clientID,joint03,0,opmode)
    vrep.simxSetIntegerSignal(clientID,"pad_switch",1,opmode)
    vrep.simxSetJointTargetPosition(clientID,jointz,-0.015,opmode)
    time. sleep(1)
    vrep.simxSetJointTargetPosition(clientID,jointz,0,opmode)

心得感想

很感謝40823214林厚宇，花費許多時間來教導大家關於CoppeliaSim及相關程式基礎，如果沒有他的話，我應該很難完成這項任務，而在進行任務的同時，我也學到了很多，也對程式跟CoppeliaSim更加熟悉了解了。

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