diff options
| -rw-r--r-- | src/modules/systemlib/pid/pid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/modules/systemlib/pid/pid.c b/src/modules/systemlib/pid/pid.c index ada364e37..2aafe0636 100644 --- a/src/modules/systemlib/pid/pid.c +++ b/src/modules/systemlib/pid/pid.c @@ -155,7 +155,7 @@ __EXPORT float pid_calculate(PID_t *pid, float sp, float val, float val_dot, flo pid->error_previous_filtered = error_filtered; } else if (pid->mode == PID_MODE_DERIVATIV_CALC_NO_SP) { - error_filtered = pid->error_previous_filtered + (val - pid->error_previous_filtered) * pid->diff_filter_factor; + error_filtered = pid->error_previous_filtered + (- val - pid->error_previous_filtered) * pid->diff_filter_factor; d = (error_filtered - pid->error_previous_filtered) / fmaxf(dt, 0.003f); // fail-safe for too low dt pid->error_previous_filtered = error_filtered; } else if (pid->mode == PID_MODE_DERIVATIV_SET) { |