【作者】 李洪祚； 白雪梅； 詹伟达；

【Author】 LI Hong-zuo,BAI Xue-mei,ZHAN Wei-da(Changchun University of Science and Technology,Changchun 130022,china)

【机构】 长春理工大学；

【摘要】 卫星光通信系统中机载转塔是闭合机箱,需采用整体温度控制技术使转塔温度稳定在设定的值,为转塔内设备提供恒温环境。其单闭环基本控制原理为:传感器将温度采样值输入单片机89C55中央控制单元,采样值与温度设定值同时送入算法子程序进行运算得到输出控制量,输出控制量通过固态继电器(执行电路)作用到加热电阻丝上,控制部分采用脉宽调制即PWM,通过控制一个时间段内通过的交流电波数控制加热功率。由温度采样中断程序、控制中断程序、时间计时中断程序、参数调节中断服务程序等实现。更多还原

【Abstract】 Airborne turret is a closed case in the satellite optical communication system,so it’s necessary to adopt global temperature control technique to maintain the temperature of the turret at the set value to provide constant temperature for the equipments.The control principle of the single loop is as followed.First the temperature sample value is inputted by the sensor to the centre control unit of a 89C55 microprocessor,then sampled value and set value are delivered to the algorithm subprogram at the same time,the output control value calculated by the algorithm subprogram is processed to the heating resistance wires through the execution circuit solid relay.Its control part adopts pulse width modulation(PWM) which controls the heating power by controlling alternating current over a period of time.Those are implemented by temperature sample interrupt program,control interrupt program,timing interrupt program and parameter adjustment interrupt program,etc.更多还原