velocity_smoother c代码
时间: 2023-07-30 22:10:46 浏览: 77
以下是一个简单的 velocity_smoother 的 C 代码示例:
```c
typedef struct
{
double max_acceleration; // 最大加速度
double max_deceleration; // 最大减速度
double time_constant; // 时间常数
double last_velocity; // 上次速度
double last_time; // 上次时间
} VelocitySmoother;
VelocitySmoother* velocity_smoother_create(double max_acceleration, double max_deceleration, double time_constant)
{
VelocitySmoother* smoother = (VelocitySmoother*)malloc(sizeof(VelocitySmoother));
smoother->max_acceleration = max_acceleration;
smoother->max_deceleration = max_deceleration;
smoother->time_constant = time_constant;
smoother->last_velocity = 0.0;
smoother->last_time = 0.0;
return smoother;
}
void velocity_smoother_destroy(VelocitySmoother* smoother)
{
free(smoother);
}
double velocity_smoother_update(VelocitySmoother* smoother, double velocity, double time)
{
double dt = time - smoother->last_time;
double dv = velocity - smoother->last_velocity;
double acceleration = dv / dt;
double sign = (acceleration > 0.0) ? 1.0 : -1.0;
double smoothed_velocity = velocity + sign * (1.0 - exp(-fabs(acceleration) * dt / smoother->time_constant)) * smoother->time_constant;
double max_rate = (sign > 0.0) ? smoother->max_acceleration : smoother->max_deceleration;
double max_change = max_rate * dt;
smoothed_velocity = fmin(smoothed_velocity, smoother->last_velocity + max_change);
smoothed_velocity = fmax(smoothed_velocity, smoother->last_velocity - max_change);
smoother->last_velocity = smoothed_velocity;
smoother->last_time = time;
return smoothed_velocity;
}
```
该代码使用了 C 语言结构体来封装 velocity_smoother,包含了创建、销毁和更新 velocity_smoother 的函数。在更新函数中,首先计算出机器人的加速度,然后根据时间常数和加速度对机器人的速度进行平滑处理。接着,根据最大加速度和最大减速度限制机器人的速度变化,确保机器人速度变化平滑且不超过最大加速度和最大减速度的限制。最后,更新机器人的速度和时间,并返回平滑后的速度值。
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