51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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#ifndef PIBOT_DIFFERENTIAL_H_
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#define PIBOT_DIFFERENTIAL_H_
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// 2轮差分模型
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#include "model.h"
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#include "math.h"
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//定义Motor数目
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#define MOTOR_COUNT 2
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// 2轮差分模型接口实现
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class Differential : public Model
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{
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public:
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Differential() {}
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Differential(float _wheel_radius, float _body_radius) : Model(_wheel_radius, _body_radius) {}
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// 运动解算 把给到机器人的速度分解为各个轮子速度
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virtual void motion_solver(float* robot_speed, float* motor_speed) {
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// robot_speed[0] x robot_speed[1] y robot_speed[2] z
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motor_speed[0] = (-robot_speed[0] + robot_speed[2] * body_radius) / wheel_radius;
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motor_speed[1] = ( robot_speed[0] + robot_speed[2] * body_radius) / wheel_radius;
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}
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// 反解算,把各个轮子的速度转为机器人的速度,这里通过固定时间间隔转为里程
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virtual void get_odom(struct Odom* odom, float* motor_dis, unsigned long interval) {
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float dxy_ave = (-motor_dis[0] + motor_dis[1]) / 2.0;
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float dth = (motor_dis[0] + motor_dis[1]) / (2* body_radius);
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float vxy = 1000 * dxy_ave / interval;
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float vth = 1000 * dth / interval;
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odom->vel_x = vxy;
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odom->vel_y = 0;
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odom->vel_z = vth;
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float dx = 0, dy = 0;
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if (motor_dis[0] != motor_dis[1]) {
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dx = cos(dth) * dxy_ave;
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dy = -sin(dth) * dxy_ave;
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odom->x += (cos(odom->z) * dx - sin(odom->z) * dy);
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odom->y += (sin(odom->z) * dx + cos(odom->z) * dy);;
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}
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if (motor_dis[0] + motor_dis[1] != 0)
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odom->z += dth;
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}
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};
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#endif
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