数控直流电流源(电子设计大赛论文).doc
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数控直流电流源(电子设计大赛论文),论文标准word格式排版 共43页 13201字摘要本系统以摩托罗拉16位dsp芯片56f807为核心处理器,主要负责a/d采集、d/a输出和pid算法的计算。在恒流电源控制电路中,采用大功率达林顿管提供恒流电源所需要的大电流,负载可变,输出电压在10v以内变化。d/a输出电压控制输出电流在20ma到2000ma之间调...
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论文标准WORD格式排版 共43页 13201字
摘要
本系统以摩托罗拉16位DSP芯片56F807为核心处理器,主要负责A/D采集、D/A输出和PID算法的计算。在恒流电源控制电路中,采用大功率达林顿管提供恒流电源所需要的大电流,负载可变,输出电压在10V以内变化。D/A输出电压控制输出电流在20mA到2000mA之间调节,并保持稳定。本系统采用单闭环负反馈PID(比例、积分、微分)算法控制,缩短上升时间,减小超调量,减小了输出电流的偏差。采用 总线接口键盘,具有设定值调整,微调(步进量1),粗调(步进量10)三种调整功能,中文LCD,可同时显示设定值,实际值和测量误差的绝对值。本系统具有超压保护和报警功能。我们自行设计了 15V、+12V和5V电源为系统供电。
Abstract
This system depends on Motorola DSP56F807 as the core. It is mainly used for A/D collection, D/A controller and PID control algorithm in the automatic control system.In the constant ampere power source circuit, we use complementary silicon power darlington transistors for the large current supply, variable load and variable voltage within 10V.D/A output voltage can control the current between 20mA and 2000mA.
This system adoption list shuts the wreath negative feedback PID( proportion, integral calculus, differential calculus) calculate way control, shortening to rise time, let up super adjust the quantity, let up to output the deviation of the electric current. Adopt the bus connects a keyboard, having the initial value adjustment, tiny adjust, large adjust three kinds of adjust the function, LCD with Chinese characters, which can show the initial value at the same time, actual value and measure absolute value of the error margin. This system has super press the protection and warning system. We by ourselves designed the 15 Vs, 12V and 5V power supplies to be the system power supplies.
1 方案比较,设计与论证
1.1 控制方案比较
方案一(见图1)此方案是传统的模拟PID控制方案,其优点是不占用CPU处理器的时间,对处理器性能的要求比较低。但模拟PID控制方式的参数不易匹配,调节时间长,难以把精度做得很高,并且难以实现题中要求的良好的人机交互功能。
......
摘要
本系统以摩托罗拉16位DSP芯片56F807为核心处理器,主要负责A/D采集、D/A输出和PID算法的计算。在恒流电源控制电路中,采用大功率达林顿管提供恒流电源所需要的大电流,负载可变,输出电压在10V以内变化。D/A输出电压控制输出电流在20mA到2000mA之间调节,并保持稳定。本系统采用单闭环负反馈PID(比例、积分、微分)算法控制,缩短上升时间,减小超调量,减小了输出电流的偏差。采用 总线接口键盘,具有设定值调整,微调(步进量1),粗调(步进量10)三种调整功能,中文LCD,可同时显示设定值,实际值和测量误差的绝对值。本系统具有超压保护和报警功能。我们自行设计了 15V、+12V和5V电源为系统供电。
Abstract
This system depends on Motorola DSP56F807 as the core. It is mainly used for A/D collection, D/A controller and PID control algorithm in the automatic control system.In the constant ampere power source circuit, we use complementary silicon power darlington transistors for the large current supply, variable load and variable voltage within 10V.D/A output voltage can control the current between 20mA and 2000mA.
This system adoption list shuts the wreath negative feedback PID( proportion, integral calculus, differential calculus) calculate way control, shortening to rise time, let up super adjust the quantity, let up to output the deviation of the electric current. Adopt the bus connects a keyboard, having the initial value adjustment, tiny adjust, large adjust three kinds of adjust the function, LCD with Chinese characters, which can show the initial value at the same time, actual value and measure absolute value of the error margin. This system has super press the protection and warning system. We by ourselves designed the 15 Vs, 12V and 5V power supplies to be the system power supplies.
1 方案比较,设计与论证
1.1 控制方案比较
方案一(见图1)此方案是传统的模拟PID控制方案,其优点是不占用CPU处理器的时间,对处理器性能的要求比较低。但模拟PID控制方式的参数不易匹配,调节时间长,难以把精度做得很高,并且难以实现题中要求的良好的人机交互功能。
......