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PID float scaling in deg/sec

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fix
This commit is contained in:
borisbstyle 2016-07-17 01:46:04 +02:00
parent 34fd8f3c88
commit 6582a958aa
2 changed files with 11 additions and 9 deletions
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14
src/main/flight/pid.c
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@ -129,9 +129,9 @@ static void pidFloat(const pidProfile_t *pidProfile, uint16_t max_angle_inclinat
float tpaFactor = PIDweight[0] / 100.0f; // tpa is now float
// Scaling factors for Pids for better tunable range in configurator
static const float luxPTermScale = 1.0f / 128;
static const float luxITermScale = 1000000.0f / 0x1000000;
static const float luxDTermScale = (0.000001f * (float)0xFFFF) / 508;
static const float PTermScale = 0.032029f;
static const float ITermScale = 0.244381f;
static const float DTermScale = 0.000529f;
if (FLIGHT_MODE(HORIZON_MODE)) {
// Figure out the raw stick positions
@ -170,7 +170,7 @@ static void pidFloat(const pidProfile_t *pidProfile, uint16_t max_angle_inclinat
}
}
gyroRate = gyroADCf[axis] / 4.0f; // gyro output scaled for easier int conversion
gyroRate = gyroADCf[axis] / 16.4f; // gyro output deg/sec
// --------low-level gyro-based PID. ----------
// Used in stand-alone mode for ACRO, controlled by higher level regulators in other modes
@ -187,7 +187,7 @@ static void pidFloat(const pidProfile_t *pidProfile, uint16_t max_angle_inclinat
}
// -----calculate P component
PTerm = luxPTermScale * RateError * pidProfile->P8[axis] * tpaFactor;
PTerm = PTermScale * RateError * pidProfile->P8[axis] * tpaFactor;
// Constrain YAW by yaw_p_limit value if not servo driven in that case servolimits apply
if((motorCount >= 4 && pidProfile->yaw_p_limit) && axis == YAW) {
@ -197,7 +197,7 @@ static void pidFloat(const pidProfile_t *pidProfile, uint16_t max_angle_inclinat
// -----calculate I component.
uint16_t kI = (pidProfile->dynamic_pid) ? getDynamicKi(axis, pidProfile, (int32_t)angleRate[axis]) : pidProfile->I8[axis];
errorGyroIf[axis] = constrainf(errorGyroIf[axis] + luxITermScale * errorLimiter * RateError * getdT() * kI, -250.0f, 250.0f);
errorGyroIf[axis] = constrainf(errorGyroIf[axis] + ITermScale * errorLimiter * RateError * getdT() * kI, -250.0f, 250.0f);
// limit maximum integrator value to prevent WindUp - accumulating extreme values when system is saturated.
// I coefficient (I8) moved before integration to make limiting independent from PID settings
@ -232,7 +232,7 @@ static void pidFloat(const pidProfile_t *pidProfile, uint16_t max_angle_inclinat
// Filter delta
if (pidProfile->dterm_lpf_hz) delta = pt1FilterApply4(&deltaFilter[axis], delta, pidProfile->dterm_lpf_hz, getdT());
DTerm = constrainf(luxDTermScale * delta * (float)pidProfile->D8[axis] * tpaFactor, -300.0f, 300.0f);
DTerm = constrainf(DTermScale * delta * (float)pidProfile->D8[axis] * tpaFactor, -300.0f, 300.0f);
// -----calculate total PID output
axisPID[axis] = constrain(lrintf(PTerm + ITerm + DTerm), -1000, 1000);