//To find power and speed fluctuation clc //Given: N=250 //rpm m=500 //kg k=600/1000 //m //Solution: //Refer Fig. 16.8 //Calculating the angular speed of the crank omega=2*%pi*N/60 //rad/s //Calculating the torque required for one complete cycle T=(6*%pi*750)+(1/2*%pi*(3000-750))+(2*%pi*(3000-750))+(1/2*%pi*(3000-750)) //N-m //Calculating the mean torque Tmean=T/(6*%pi) //N-m //Calculating the power required to drive the machine P=Tmean*omega/1000 //kW //Coefficient of fluctuation of speed: //Calculating the value of LM LM=%pi*((3000-1875)/(3000-750)) //Calculating the value of NP NP=%pi*((3000-1875)/(3000-750)) //Calculating the value of BM BM=3000-1875 //N-m CN=BM //Calculating the value of MN MN=2*%pi //Calculating the maximum fluctuation of energy deltaE=(1/2*LM*BM)+(MN*BM)+(1/2*NP*CN) //N-m //Calculating the coefficient of fluctuation of speed CS=deltaE/(m*k^2*omega^2) //Results: printf("\n\n Power required to drive the machine, P = %.3f kW.\n\n",P) printf(" Coefficient of speed, CS = %.3f.\n\n",CS)