如何在 C++ 中实现传递函数的控制系统块？
我想定义一个控制系统块，如下所示：
class ControlSystemBlock
{
public:
ControlSystemBlock()
{
m_dbTimeStep = 0.001; // time between two consequential inputs
}
// this method can be called anytime,
// but the object will assume
// that it was called
// after m_dbTimeStep before the last call
void LoadNewInput(double dbInputValue);
double GetCurrentOutput();
// ...
private:
double m_dbTimeStep;
// ...
};
系统将接收输入，并根据这些输入和用户定义的传递函数，其输出值将及时改变。
例如，假设我想实现传递函数 H(s) = 1 / (s + 2)。我该怎么做？有什么算法吗？
I want to define a control system block like:
class ControlSystemBlock
{
public:
ControlSystemBlock()
{
m_dbTimeStep = 0.001; // time between two consequential inputs
}
// this method can be called anytime,
// but the object will assume
// that it was called
// after m_dbTimeStep before the last call
void LoadNewInput(double dbInputValue);
double GetCurrentOutput();
// ...
private:
double m_dbTimeStep;
// ...
};
The system will receive inputs, and according to these inputs and user defined transfer-function in it, its output value will change in time.
For instance, assume that I want to implement the transfer function H(s) = 1 / (s + 2). How do I do it? Is there any algorithm for that?
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评论（2）
你觉得我的代码怎么样：
ControlSystemBlock.h
ControlSystemBlock.cpp
我刚刚完成它。
我很快就会测试一下。
What do you think of my code:
ControlSystemBlock.h
ControlSystemBlock.cpp
I have just finished it.
I going to test it soon.
让系统接受一个函数（即 C++0x 中的 std::function 或 Boost 中的等效函数）接受一个 double 值并返回一个 double 值，并使用该函数进行实际计算。
然后，用户可以提供任意函数或函子（重载
operator()的类）来执行您想要的转换函数。或者，使您的函数需要任意转换模板函数，并按值传递函子/函数指针，就像 STL 算法所做的那样。
Make the system accept a function (i.e.
std::functionin C++0x, or the equivalents in Boost) taking a double and returning a double, and use that function to do the actual calculation.The user can then supply any arbitrary function or functor (a class overloading
operator()) in order to do the transformation function you want.Alternately, make your functions requiring the arbitrary transformation template functions and pass the functor/function pointer in by value, like the STL algorithms do.