Application of programmable weft tension controller

According as energy conservation principle,the formula of weft tension peak value during air-jet weaving was deduced.It points out that the way to decrease the peak value is to decrease the weft speed at weft braking.Based on this,the method of weft tension controller was introduced.It has developed a new method to controlling weft tension.The linear prediction will be used in the method.It decreases the peak value and consoles the coefficient of mean deviation of arriving time,thus leveling off the flight state of weft and improving production efficiency.It constitutes an integral weft control strategy when coupled with the existing control method of weft arriving time.