optimizermethod.cpp

来自「InnovLabSimu在vc++下实现」· C++ 代码 · 共 53 行

//#include "StdAfx.h"
#include "OptimizerMethod.h"
using namespace std;
COptimizerMethod::COptimizerMethod(void)
{
	 m_fAmplitudeGain=1.2;
	 m_fDecreaseGain=0.5;
	 m_fStepAmplitudeMax=0.9;
	 m_fStepAmplitudeMin=1e-6;
}
COptimizerMethod::COptimizerMethod(float AmplitudeGain,float DecreaseGain,float StepAmplitudeMax)
{
	m_fAmplitudeGain=AmplitudeGain;
	m_fDecreaseGain=DecreaseGain;
	m_fStepAmplitudeMax=StepAmplitudeMax;
	m_fStepAmplitudeMin=1e-6;
}
COptimizerMethod::~COptimizerMethod(void)
{
	
}

float COptimizerMethod::RPPOP_DeltaStepSeek(double& CurrentErrorDif,double& PreErrorDif,double& PreDeltaStep)
{
	float AdjustStep;//最后结果，即本此调整步长
	float DeltaStep;//步长调整值的变化量
	if (CurrentErrorDif*PreErrorDif>0)//%误差单调（上升或下降）
	{
		DeltaStep=min(float(m_fAmplitudeGain*PreDeltaStep),m_fStepAmplitudeMax);
		PreDeltaStep=DeltaStep;//;%步长调整的幅值,当前计算的结果传出去下次用
		AdjustStep=-DeltaStep*sign(CurrentErrorDif);  
		PreErrorDif=CurrentErrorDif;//%为下一次准备
	}	
	else if (CurrentErrorDif*PreErrorDif<0)//%误差经过极值
	{
		AdjustStep=-PreDeltaStep;
		PreDeltaStep=max(float(m_fDecreaseGain*PreDeltaStep),m_fStepAmplitudeMin);//%当前计算的结果传出去下次用    
		PreErrorDif=0;//关键在此处，必须把0传出去
	}	
	else if (CurrentErrorDif*PreErrorDif==0)//%误差曾经过极值
	{
		AdjustStep=-sign(CurrentErrorDif)*PreDeltaStep;
		PreErrorDif=CurrentErrorDif;//%为下一次准备
	}		
	return AdjustStep;
}
inline float COptimizerMethod::sign(double &number)
{
	float Sign=number>=0?1.0:-1.0;
	return Sign;
}